Thursday, July 30, 2015, 17:02

EVAP1 cooling system is now on the NALCW.  The city water has been removed from the system.  

Tested all the cooling system interlocks by shutting off each individual valve, and the main supply valve to the lab -  All Passed!  

 Monday, July 13, 2015, 11:53

A Ta foil is placed in the target boat with separate slots for each endcap [same as elog 200]

The target boat is wrapped with 3-layers of Ta-heat shield.

The boat is installed in EVAP2, chamber is currently being pumped down.

 Monday, July 13, 2015, 15:00

Opened HS water valves, no leaks detected.

IGP1 = 2.7e-6 Torr.

Tapping up manually.

 Monday, July 13, 2015, 15:41

Tapped up manually to 30A

TGHT = 30A, 0.05V

IGP1 = 7e-6 Torr.

Initiating auto-ramp at 0.2A/min up to 480A with a final desired temperature of 1800C

 Tuesday, July 14, 2015, 09:12

IGP1 = 7.8e-7 Torr

TGHT = 241A, 3.3V

OMEGA = 1010C

Increasing auto-ramp to 2.0A/min

 Tuesday, July 14, 2015, 11:12

Reached final setpoint of TGHT = 480A, 8.43V

OMEGA = 1667C

IGP1 = 3.3e-6 Torr.

Tapping up manually to reach final desired temperature of 1800C.

 Tuesday, July 14, 2015, 11:33

Reached TGHT = 500A, 8.8V by tapping up manually.

OMEGA = 1714V

IGP1= 3.5e-6 Torr.

Re-initiating auto-ramp at 2.0A/min with a final setpoint of 580A.

New final desired temperature min of 1900C

 Tuesday, July 14, 2015, 13:16

TGHT = 577A, 10.74V

OMEGA = 1938C

IGP1 = 3.2e-6 Torr

Endcaps have been at this temperature for just over an hour.

Spikes in vacuum started ~430A - this is due to the green TaC coating reacting with the Ta foil, the carbide is reacting directly with the Ta foil [see picture]

Stopping sintering early before endcaps break -> initiating auto-cool at 2.0A/min.

 Wednesday, July 15, 2015, 11:33

Vented in air and took out this morning.

Endcaps sintered on top side but not fully sintered on inner edge.

Inner edge is peeling off and unsintered green TaC.

The coating peeling off did not shrink, as seen with previous tests done, one would expect a shrinkage in the coating when heated.

The peeling is most likely due to the way to endcaps were placed  in the slots of the Ta foil.

This may have cause the foil to be hotter than the inside of the endcaps and subsequently the Ta foil and TaC coating on the inside reacted - with the Ta foil extracting the carbide from the coating.

This would cause the outer edges of the inside of the endcap to peel/curl inwards as it was heated [like a cast, as the cast dries the outer edges curl inwards].

See photos attached for clarification.

Endcaps will be re-coated and sintered again via a different procedure.

 Monday, June 29, 2015, 16:17

Target container is coated with TaC. No Ta-heat shields are used.

TGHT will be ramped up to 580A at 0.2A/min.

TBHT will be ramped up to 230A at 01A/min.

Chamber is currently being pumped down.

Laura Lambert wrote:

Monday, June 29, 2015, 16:17 Target container is coated with TaC. No Ta-heat shields are used. TGHT will be ramped up to 580A at 0.2A/min. TBHT will be ramped up to 230A at 01A/min. Chamber is currently being pumped down.

 Monday, June 29, 2015, 23:37

Opened the HS valves around 5pm.  Small leaks or just a vibration in the pipe line caused a rise in vacuum.  Leak rate is small, so allow the chamber to continue to pump down over night.

Sintering process can begin tomorrow if vacuum is allowed.

John Wong wrote:

Laura Lambert wrote:  Monday, June 29, 2015, 16:17 Target container is coated with TaC. No Ta-heat shields are used. TGHT will be ramped up to 580A at 0.2A/min. TBHT will be ramped up to 230A at 01A/min. Chamber is currently being pumped down.    Monday, June 29, 2015, 23:37 Opened the HS valves around 5pm.  Small leaks or just a vibration in the pipe line caused a rise in vacuum.  Leak rate is small, so allow the chamber to continue to pump down over night. Sintering process can begin tomorrow if vacuum is allowed.

 Tuesday, June 30, 2015, 08:22

IGP1 = 3.6e-7 Torr.

Tapped up manually to 40A.

Vacuum looks good.

IGP1 = 6.9e-7 Torr.

Inititating auto-ramp...

 Thursday, July 02, 2015, 09:56

IGP1 = 8.9e-7 Torr.

OMEGA = 1728C

TGHT and TBHT = 580A and 230A respectively.

Tapping up manually to 1800C.

 Thursday, July 02, 2015, 11:02

TGHT = 615A, 10.9V

OMEGA = 1800C

IGP1 = 1.1e-6 Torr.

Will continue to heat for 4hrs.

 Thursday, July 02, 2015, 15:43

Target container remained at 1800C for 4hrs50min.

Initiating auto-cool for TGHT = 2A/min and TBHT = 1A/min.

 Friday, July 03, 2015, 08:24

Vented in air and opened up this morning.

Edge of container on both ends not fully sintered [see photos]

Laura Lambert wrote:

John Wong wrote: Laura Lambert wrote:  Monday, June 29, 2015, 16:17 Target container is coated with TaC. No Ta-heat shields are used. TGHT will be ramped up to 580A at 0.2A/min. TBHT will be ramped up to 230A at 01A/min. Chamber is currently being pumped down.    Monday, June 29, 2015, 23:37 Opened the HS valves around 5pm.  Small leaks or just a vibration in the pipe line caused a rise in vacuum.  Leak rate is small, so allow the chamber to continue to pump down over night. Sintering process can begin tomorrow if vacuum is allowed.    Tuesday, June 30, 2015, 08:22 IGP1 = 3.6e-7 Torr. Tapped up manually to 40A. Vacuum looks good. IGP1 = 6.9e-7 Torr. Inititating auto-ramp...  Thursday, July 02, 2015, 09:56 IGP1 = 8.9e-7 Torr. OMEGA = 1728C TGHT and TBHT = 580A and 230A respectively. Tapping up manually to 1800C.  Thursday, July 02, 2015, 11:02 TGHT = 615A, 10.9V OMEGA = 1800C IGP1 = 1.1e-6 Torr. Will continue to heat for 4hrs.  Thursday, July 02, 2015, 15:43 Target container remained at 1800C for 4hrs50min. Initiating auto-cool for TGHT = 2A/min and TBHT = 1A/min.  Friday, July 03, 2015, 08:24 Vented in air and opened up this morning. Edge of container on both ends not fully sintered [see photos]

 Monday, July 06, 2015, 11:54

Inner tube surface isn't homogeneously sintered with TaC (see attachment).  

A second coating may help.  

For the re-sintering process, the target container will be wrapped with 6.2cm Ta (width) foil as a layer for heat shield on each side of the tube,  excluding the centre block - just like the same process was done last time, see e-log ID#217.  

The Ta-foil and the target tube will be spaced with Ta wire coiled around it.  

TGHT can be ramped up about 520A/9.1V to achieve 1900C.  Heating time for 3-4 hours until vacuum comes down to low 10-6 Torr. 

John Wong wrote:

Laura Lambert wrote: John Wong wrote: Laura Lambert wrote:  Monday, June 29, 2015, 16:17 Target container is coated with TaC. No Ta-heat shields are used. TGHT will be ramped up to 580A at 0.2A/min. TBHT will be ramped up to 230A at 01A/min. Chamber is currently being pumped down.    Monday, June 29, 2015, 23:37 Opened the HS valves around 5pm.  Small leaks or just a vibration in the pipe line caused a rise in vacuum.  Leak rate is small, so allow the chamber to continue to pump down over night. Sintering process can begin tomorrow if vacuum is allowed.    Tuesday, June 30, 2015, 08:22 IGP1 = 3.6e-7 Torr. Tapped up manually to 40A. Vacuum looks good. IGP1 = 6.9e-7 Torr. Inititating auto-ramp...  Thursday, July 02, 2015, 09:56 IGP1 = 8.9e-7 Torr. OMEGA = 1728C TGHT and TBHT = 580A and 230A respectively. Tapping up manually to 1800C.  Thursday, July 02, 2015, 11:02 TGHT = 615A, 10.9V OMEGA = 1800C IGP1 = 1.1e-6 Torr. Will continue to heat for 4hrs.  Thursday, July 02, 2015, 15:43 Target container remained at 1800C for 4hrs50min. Initiating auto-cool for TGHT = 2A/min and TBHT = 1A/min.  Friday, July 03, 2015, 08:24 Vented in air and opened up this morning. Edge of container on both ends not fully sintered [see photos]    Monday, July 06, 2015, 11:54 Inner tube surface isn't homogeneously sintered with TaC (see attachment).   A second coating may help.   For the re-sintering process, the target container will be wrapped with 6.2cm Ta (width) foil as a layer for heat shield on each side of the tube,  excluding the centre block - just like the same process was done last time, see e-log ID#217.   The Ta-foil and the target tube will be spaced with Ta wire coiled around it.   TGHT can be ramped up about 520A/9.1V to achieve 1900C.  Heating time for 3-4 hours until vacuum comes down to low 10-6 Torr.

 Monday, July 06, 2015, 16:28

Container has been re-coated with TaC.

Target container is wrapped with a single 15.5cm x 8.5cm Ta foil heat shield on each side of the center block, spaced with Ta wire coil.

Chamber is currently being pumped down.

 Tuesday, July 07, 2015, 09:36

HS water valves were opened this morning, no leaks detected.

IGP1 = 6e-7 Torr.

Tapped up manually to 30A.

Waited ~1hr.

Vacuum stable, IGP1 = 1.9e-6 Torr.

Initiating auto-ramp at 0.2A/min and 0.1A/min for TGHT and TBHT respectively.

 Target container reached max setpoints of 520A/230A and 1950C ~6hrs ago.

IGP1 = 7.6e-7 Torr.

Initiating auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

 Friday, July 10, 2015, 11:16

Vented in air and removed from evap2.

Again, edges not fully sintered [see photos]

Inside of container looks better, fully coated.

 Thursday, June 25, 2015, 16:14

Total number of foils: 422 discs

Total mass of materials [incl graphite foils]: 

Total length packed: 12.0cm

Container has one Ta heat shield.

No endcaps inserted to allow outgassing

Two TaC coated Ta wires formed into a spring inserted either end to avoid ZrC expansion of materials.

Currently being pumped down.

 Friday, June 26, 2015, 11:44

HS water valves opened.

No leaks detected.

Initiating ramp up.

 Friday, June 26, 2015, 14:44

EVAP2 was tapped up manually to 50A.

Vacuum tripped evap off.

Tapping back up manually now...

 Friday, June 26, 2015, 15:53

Tapped up manually to 45A for both TGHT and TBHT

IGP1 = 4.8e-5 Torr

Will initiate auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively once vacuum settled down and stable.

Max setpoints set to 520A and 230A for the TGHT and TBHT respectively.

Good Vacuum = 3.0e-5 Torr. Bad Vacuum = 4.0e-5 Torr.

Laura Lambert wrote:

Thursday, June 25, 2015, 16:14 Total number of foils: 422 discs Total mass of materials [incl graphite foils]:  Total length packed: 13.2cm Container has one Ta heat shield. No endcaps inserted to allow outgassing Two TaC coated Ta wires formed into a spring inserted either end to avoid ZrC expansion of materials. Currently being pumped down.  Friday, June 26, 2015, 11:44 HS water valves opened. No leaks detected. Initiating ramp up.  Friday, June 26, 2015, 14:44 EVAP2 was tapped up manually to 50A. Vacuum tripped evap off. Tapping back up manually now...  Friday, June 26, 2015, 15:53 Tapped up manually to 45A for both TGHT and TBHT IGP1 = 4.8e-5 Torr Will initiate auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively once vacuum settled down and stable. Max setpoints set to 520A and 230A for the TGHT and TBHT respectively. Good Vacuum = 3.0e-5 Torr. Bad Vacuum = 4.0e-5 Torr.

 Monday, June 29, 2015, 06:57

TGHT has been at 520A/9.80V, DV 5.80V for 7 hours, temperature measured at 1800C.  Vac is coming down to 9.18e-6 Torr.  However, TGHT voltage is slightly going up over the 7 hours of heating, See screenshot attachment. (Can't make further comments until target is inspected.)

Initiated cooling down at 2A/min for TGHT and 1A/min for TBHT.

Chamber can be vented later today.

 Monday, June 29, 2015, 14:58

Target has been inspected.

Slightly crystallization on the outer tube of the container can be observed. 

Overall, the container looks a lot better than before. 

Rn foiled inserted. Salt added - Ready for test-stand

Tuesday, June 23, 2015, 12:21

Target container is loaded with 485 discs of SiC with packed length of 17.4cm. 

Container is wrapped with 3 Ta-heat shields and previously coated/sintered with TaC.

Chamber is currently being pumped down

TGHT will be ramped up to 800A, ~1800C, and TBHT is limited to 230A max.

 Tuesday, June 23, 2015, 15:53

HS valves are open, no leaks detected.

TGHT stepped up to 70A, pressure is currently at 4.17e-5 torr and coming up. 

Initiated auto-ramping at 0.5A/min for both TGHT and TBHT: good vac at 3.0e-5, bad vac at 4.0e-5 Torr.

 Wednesday, June 24, 2015, 00:03

Stopped auto-ramping about 2 hours ago.  

Manual stepped up TGHT to 73A.  Vac is stabilizing at 5e-8 Torr.  Will keep it at that current over night.

 Wednesday, June 24, 2015, 07:41

Vac has come down to 3.6e-6 Torr.

Continue to step up TGHT...

 Wednesday, June 24, 2015, 23:52

It has been a super long day operating the evaporator and finally the target is up to 1800C.  Vac is coming down from 2.e-5 Torr. 

TGHT is at 790A/12.61V, DV at 6.60V, TBHT at 230A/3.57V.  Omega temp reader is at 1680C - that's due to the window being coated with SiC, as expected. 

Target will continue heated at that current for over night, and will start the cooling process next AM. 

Thursday, June 25, 2015, 06:18  

Target is holding pretty well over night.  Vac is coming down to 1.6e-6 Torr. 

Initiated cooling down at 2A/min. 

John Wong wrote:

Tuesday, June 23, 2015, 12:21 Target container is loaded with 485 discs of SiC with packed length of 17.4cm.  Container is wrapped with 3 Ta-heat shields and previously coated/sintered with TaC. Chamber is currently being pumped down TGHT will be ramped up to 800A, ~1800C, and TBHT is limited to 230A max.  Tuesday, June 23, 2015, 15:53 HS valves are open, no leaks detected. TGHT stepped up to 70A, pressure is currently at 4.17e-5 torr and coming up.  Initiated auto-ramping at 0.5A/min for both TGHT and TBHT: good vac at 3.0e-5, bad vac at 4.0e-5 Torr.  Wednesday, June 24, 2015, 00:03 Stopped auto-ramping about 2 hours ago.   Manual stepped up TGHT to 73A.  Vac is stabilizing at 5e-8 Torr.  Will keep it at that current over night.  Wednesday, June 24, 2015, 07:41 Vac has come down to 3.6e-6 Torr. Continue to step up TGHT...  Wednesday, June 24, 2015, 23:52 It has been a super long day operating the evaporator and finally the target is up to 1800C.  Vac is coming down from 2.e-5 Torr.  TGHT is at 790A/12.61V, DV at 6.60V, TBHT at 230A/3.57V.  Omega temp reader is at 1680C - that's due to the window being coated with SiC, as expected.  Target will continue heated at that current for over night, and will start the cooling process next AM.  Thursday, June 25, 2015, 06:18   Target is holding pretty well over night.  Vac is coming down to 1.6e-6 Torr.  Initiated cooling down at 2A/min.

 Thursday, June 25, 2015, 16:09

Vented in air and took out this afternoon.

Target looks good [see photos]

Window for OMEGA fully coated from outgassing of target materials

Monday, June 22, 2015, 13:00

Containers is coated with TaC. Wrapped with 3 layers of Ta heat-shield.  Air blown to for quick dry.

Installed, and pumped down, vac currently at 6.7e-6 Torr. 

HS water valve open, no leaks detected. 

Stepping up TGHT/TBTH:  50A.

 Monday, June 22, 2015, 14:22

Pressure is coming down, currently at 1.75e-5 Torr.

auto-ramping initiated: TGHT = 820A; TBHT = 230A, rate at 2A/min.

 Tuesday, June 23, 2015, 00:50

Target container has reached to 1860C and has been heated for almost 4 hours, with TGHT at 800A/12.60V, DV = 6.28. TBHT at 230A/3.8V.  

Vac at 3e-6 Torr.  

Cooling down at 2A/min.  

Chamber can be vented tomorrow and SiC can be loaded in for the sintering process. 

John Wong wrote:

Monday, June 22, 2015, 13:00 Containers is coated with TaC. Wrapped with 3 layers of Ta heat-shield.  Air blown to for quick dry. Installed, and pumped down, vac currently at 6.7e-6 Torr.  HS water valve open, no leaks detected.  Stepping up TGHT/TBTH:  50A.  Monday, June 22, 2015, 14:22 Pressure is coming down, currently at 1.75e-5 Torr. auto-ramping initiated: TGHT = 820A; TBHT = 230A, rate at 2A/min.  Tuesday, June 23, 2015, 00:50 Target container has reached to 1860C and has been heated for almost 4 hours, with TGHT at 800A/12.60V, DV = 6.28. TBHT at 230A/3.8V.   Vac at 3e-6 Torr.   Cooling down at 2A/min.   Chamber can be vented tomorrow and SiC can be loaded in for the sintering process.

 Tuesday, June 23, 2015, 10:17

vented in air and opened up this morning.

coating looks good.

loading container now...

Tuesday June 16, 2015

An Extraction Insulator ITD0381 made from a different grade of AiN was installed in Evaporator 2 for testing purposes. The sub assembly included the SIS Restraint Housing ITD0389, New Extraction Insulator ITD0381, Repeller Electrode ITD0377, Extraction Electrode ITD0374 with fingerstock mounted.

The standoff insulator ITD0400 was found to be swelled up and broken. It was replaced with and glazed alumina insulator.

The tube heater Insulator ITD0342 - central support helicoil was repaired.

 Tuesday, June 09, 2015, 9:16

Target container is coated with TaC. No Ta-heat shields are used.

TGHT will be ramped up to 580A at 0.2A/min.

TBHT will be ramped up to 230A at 01A/min.

Chamber is currently being pumped down.

 Tuesday, June 09, 2015, 15:37

HS water valves were opened. no leaks detected.

Tapped up manually to 35A.

Once vacuum stabilized after ~45min, initiated auto-ramp.

 Wednesday, June 10, 2015, 08:02

IGP1 = 5.3e-7 Torr.

TGHT = 250A and TBHT = 140A.

Increasing auto ramp to 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

Laura Lambert wrote:

Tuesday, June 09, 2015, 9:16 Target container is coated with TaC. No Ta-heat shields are used. TGHT will be ramped up to 580A at 0.2A/min. TBHT will be ramped up to 230A at 01A/min. Chamber is currently being pumped down.  Tuesday, June 09, 2015, 15:37 HS water valves were opened. no leaks detected. Tapped up manually to 35A. Once vacuum stabilized after ~45min, initiated auto-ramp.  Wednesday, June 10, 2015, 08:02 IGP1 = 5.3e-7 Torr. TGHT = 250A and TBHT = 140A. Increasing auto ramp to 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

 Wednesday, June 10, 2015, 16:32

TGHT/TBHT are at 580A/230A for almost 6 hours, temp at 1728C.

Vac at 8.5e-7 Torr. 

Cooling down initiated at 1A/min.

Target container should be inspected once the chamber is vented.

John Wong wrote:

Laura Lambert wrote:  Tuesday, June 09, 2015, 9:16 Target container is coated with TaC. No Ta-heat shields are used. TGHT will be ramped up to 580A at 0.2A/min. TBHT will be ramped up to 230A at 01A/min. Chamber is currently being pumped down.  Tuesday, June 09, 2015, 15:37 HS water valves were opened. no leaks detected. Tapped up manually to 35A. Once vacuum stabilized after ~45min, initiated auto-ramp.  Wednesday, June 10, 2015, 08:02 IGP1 = 5.3e-7 Torr. TGHT = 250A and TBHT = 140A. Increasing auto ramp to 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.    Wednesday, June 10, 2015, 16:32 TGHT/TBHT are at 580A/230A for almost 6 hours, temp at 1728C. Vac at 8.5e-7 Torr.  Cooling down initiated at 1A/min. Target container should be inspected once the chamber is vented.

 Thursday, June 11, 2015, 10:55

Vented in air and opened up this morning.

Same as last container sintered in evap2 [IG-LIS for UCx#13] - ends not quite fully sintered and coating not very good.

most likely due to old TaC spray.

See link for photos.

https://www.dropbox.com/sh/75o43x8y2z16e7j/AABc8Z1fTTaTRtJ5_Jr1eacWa?dl=0

Laura Lambert wrote:

John Wong wrote: Laura Lambert wrote:  Tuesday, June 09, 2015, 9:16 Target container is coated with TaC. No Ta-heat shields are used. TGHT will be ramped up to 580A at 0.2A/min. TBHT will be ramped up to 230A at 01A/min. Chamber is currently being pumped down.  Tuesday, June 09, 2015, 15:37 HS water valves were opened. no leaks detected. Tapped up manually to 35A. Once vacuum stabilized after ~45min, initiated auto-ramp.  Wednesday, June 10, 2015, 08:02 IGP1 = 5.3e-7 Torr. TGHT = 250A and TBHT = 140A. Increasing auto ramp to 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.    Wednesday, June 10, 2015, 16:32 TGHT/TBHT are at 580A/230A for almost 6 hours, temp at 1728C. Vac at 8.5e-7 Torr.  Cooling down initiated at 1A/min. Target container should be inspected once the chamber is vented.    Thursday, June 11, 2015, 10:55 Vented in air and opened up this morning. Same as last container sintered in evap2 [IG-LIS for UCx#13] - ends not quite fully sintered and coating not very good. most likely due to old TaC spray. See link for photos. https://www.dropbox.com/sh/75o43x8y2z16e7j/AABc8Z1fTTaTRtJ5_Jr1eacWa?dl=0

 Monday, June 15, 2015, 15:24

Same problem also found for the LP-IG-LIS container, WO#40860-1, see elog id#215.  After re-coating and sintering, it seems better. 

For this container, it is re-coated and will undergo the sintering process one more time. 

Will try to go up to 1900C for the sintering process.

Target container is temporarily wrapped with 6.2cm of Ta foil as a layer for heat shield on each side of the tube, excluding the centre block.  The shield will be removed once the process is done.  

Target current will be controlled accordingly. 

Chamber is being pumped down. 

 Monday, June 15, 2015, 16:17

HS water valves open; no leaks detected. 

IGP1 at 6.8e-6 Torr and coming down.

 Monday, June 15, 2015, 17:21

Stepping up TGHT/TBHT to 60A, pressure seems pretty stable at 7.2e-6 Torr and coming down. 

Setting TGHT to 400A and TBHT to 230A, auto-ramping initiated.   Will setup up current to reach 1900C, if necessary. 

 Monday, June 15, 2015, 20:28

TGHT and TBHT reached 400A/230A, Temp at 1552C.  Vac at 2.7e-6 Torr.

Stepping TGHT

Monday, June 15, 2015, 21:16  

TGHT at 520A/9.06 V to achieve 1900C.  DV at 5.09V.  

Vac at 4.2e-6 Torr.  

Will continue the sintering process at this temperature for another 3-4 hours. 

 Tuesday, June 16, 2015, 00:15

Target container has been heated at 1900C for over 3 hours.  

Vacuum is coming down to 1.4e-6 Torr.  

Initiated cooling process at 2A/min

Chamber can be vented tomorrow and container should be inspected

 Friday, June 26, 2015, 16:04

Container looks good!

 Thursday, June 04, 2015, 9:07

Container was sprayed with TaC and let dry.

Container has 3x Ta heat shields including center block.

Container was loaded into EVAP2 yesterday and pumped down overnight.

HS water valves were opened up this morning, no leaks detected.

IGP1 = 4.6e-7 Torr.

Tapped up manually to 40A.

Waited ~25min, Vacuum stable.

IGP1 = 5.0e-7 Torr.

Initiating auto-ramp.

TGHT will be ramped to reach 2000C

 Friday, June 05, 2015, 10:01

IGP1 = 4.5e-7 Torr.

TGHT = 313A, 4.47V

OMEGA = 1444C

Increasing ramping rate to 1.0A/min

 Friday, June 05, 2015, 11:31

IGP1 = 1.2e-6 Torr.

Increasing ramping rate to 2.0A/min

Laura Lambert wrote:

Thursday, June 04, 2015, 9:07 Container was sprayed with TaC and let dry. Container has 3x Ta heat shields including center block. Container was loaded into EVAP2 yesterday and pumped down overnight. HS water valves were opened up this morning, no leaks detected. IGP1 = 4.6e-7 Torr. Tapped up manually to 40A. Waited ~25min, Vacuum stable. IGP1 = 5.0e-7 Torr. Initiating auto-ramp. TGHT will be ramped to reach 2000C  Friday, June 05, 2015, 10:01 IGP1 = 4.5e-7 Torr. TGHT = 313A, 4.47V OMEGA = 1444C Increasing ramping rate to 1.0A/min  Friday, June 05, 2015, 11:31 IGP1 = 1.2e-6 Torr. Increasing ramping rate to 2.0A/min

 Friday, June 05, 2015, 12:01

TGHT reached to 465A/7.56V, temp is stable at 2000C. Current vac at 1.2e-6 Torr and coming down

Cooling down process can be initiated after 4 hours. 

John Wong wrote:

Laura Lambert wrote:  Thursday, June 04, 2015, 9:07 Container was sprayed with TaC and let dry. Container has 3x Ta heat shields including center block. Container was loaded into EVAP2 yesterday and pumped down overnight. HS water valves were opened up this morning, no leaks detected. IGP1 = 4.6e-7 Torr. Tapped up manually to 40A. Waited ~25min, Vacuum stable. IGP1 = 5.0e-7 Torr. Initiating auto-ramp. TGHT will be ramped to reach 2000C  Friday, June 05, 2015, 10:01 IGP1 = 4.5e-7 Torr. TGHT = 313A, 4.47V OMEGA = 1444C Increasing ramping rate to 1.0A/min  Friday, June 05, 2015, 11:31 IGP1 = 1.2e-6 Torr. Increasing ramping rate to 2.0A/min    Friday, June 05, 2015, 12:01 TGHT reached to 465A/7.56V, temp is stable at 2000C. Current vac at 1.2e-6 Torr and coming down Cooling down process can be initiated after 4 hours.

 Friday, June 05, 2015, 13:21

OMEGA = 1995C

Increasing TGHT to 470A to achieve desired max temperature of 2000C

Friday, June 05, 2015, 15:59

TGHT sat at max desired temperature of 2000C for ~4hrs.

TGHT = 470A, 7.7V

Initiating auto-cool at 1.0A/min.

 Monday, June 08, 2015, 11:31

Vented in air and opened up this morning.

Target container mostly sintered, two tiny patches near both ends not fully sintered.

Will re-install and re-sinter next week as another container with priority needs to be sintered first.

 Tuesday, June 09, 2015, 10:45

See attachements for 'not-fully-sintered' photos

Laura Lambert wrote:

John Wong wrote: Laura Lambert wrote:  Thursday, June 04, 2015, 9:07 Container was sprayed with TaC and let dry. Container has 3x Ta heat shields including center block. Container was loaded into EVAP2 yesterday and pumped down overnight. HS water valves were opened up this morning, no leaks detected. IGP1 = 4.6e-7 Torr. Tapped up manually to 40A. Waited ~25min, Vacuum stable. IGP1 = 5.0e-7 Torr. Initiating auto-ramp. TGHT will be ramped to reach 2000C  Friday, June 05, 2015, 10:01 IGP1 = 4.5e-7 Torr. TGHT = 313A, 4.47V OMEGA = 1444C Increasing ramping rate to 1.0A/min  Friday, June 05, 2015, 11:31 IGP1 = 1.2e-6 Torr. Increasing ramping rate to 2.0A/min    Friday, June 05, 2015, 12:01 TGHT reached to 465A/7.56V, temp is stable at 2000C. Current vac at 1.2e-6 Torr and coming down Cooling down process can be initiated after 4 hours.     Friday, June 05, 2015, 13:21 OMEGA = 1995C Increasing TGHT to 470A to achieve desired max temperature of 2000C Friday, June 05, 2015, 15:59 TGHT sat at max desired temperature of 2000C for ~4hrs. TGHT = 470A, 7.7V Initiating auto-cool at 1.0A/min.  Monday, June 08, 2015, 11:31 Vented in air and opened up this morning. Target container mostly sintered, two tiny patches near both ends not fully sintered. Will re-install and re-sinter next week as another container with priority needs to be sintered first.  Tuesday, June 09, 2015, 10:45 See attachements for 'not-fully-sintered' photos

 Wednesday, June 10, 2015, 12:06

After inspecting the target container,  the inner tube surface has "dark" patches, which may not be evenly coated or the coating layer was too think.  

See link for photos:  https://www.dropbox.com/sh/m94mjuuodwhz5jb/AADEBv_Kha_p_1An40eftWNHa?dl=0 

Attempt to re-spray the container and re-sinter.  

John Wong wrote:

Laura Lambert wrote: John Wong wrote: Laura Lambert wrote:  Thursday, June 04, 2015, 9:07 Container was sprayed with TaC and let dry. Container has 3x Ta heat shields including center block. Container was loaded into EVAP2 yesterday and pumped down overnight. HS water valves were opened up this morning, no leaks detected. IGP1 = 4.6e-7 Torr. Tapped up manually to 40A. Waited ~25min, Vacuum stable. IGP1 = 5.0e-7 Torr. Initiating auto-ramp. TGHT will be ramped to reach 2000C  Friday, June 05, 2015, 10:01 IGP1 = 4.5e-7 Torr. TGHT = 313A, 4.47V OMEGA = 1444C Increasing ramping rate to 1.0A/min  Friday, June 05, 2015, 11:31 IGP1 = 1.2e-6 Torr. Increasing ramping rate to 2.0A/min    Friday, June 05, 2015, 12:01 TGHT reached to 465A/7.56V, temp is stable at 2000C. Current vac at 1.2e-6 Torr and coming down Cooling down process can be initiated after 4 hours.     Friday, June 05, 2015, 13:21 OMEGA = 1995C Increasing TGHT to 470A to achieve desired max temperature of 2000C Friday, June 05, 2015, 15:59 TGHT sat at max desired temperature of 2000C for ~4hrs. TGHT = 470A, 7.7V Initiating auto-cool at 1.0A/min.  Monday, June 08, 2015, 11:31 Vented in air and opened up this morning. Target container mostly sintered, two tiny patches near both ends not fully sintered. Will re-install and re-sinter next week as another container with priority needs to be sintered first.  Tuesday, June 09, 2015, 10:45 See attachements for 'not-fully-sintered' photos    Wednesday, June 10, 2015, 12:06 After inspecting the target container,  the inner tube surface has "dark" patches, which may not be evenly coated or the coating layer was too think.   See link for photos:  https://www.dropbox.com/sh/m94mjuuodwhz5jb/AADEBv_Kha_p_1An40eftWNHa?dl=0  Attempt to re-spray the container and re-sinter.

 Friday, June 12, 2015, 14:58

re-sprayed with second layer of TaC spray this morning.

re-loaded into evap2.

HS water valves opened, no leaks detected.

will ramp-up over weekend.

Laura Lambert wrote:

John Wong wrote: Laura Lambert wrote: John Wong wrote: Laura Lambert wrote:  Thursday, June 04, 2015, 9:07 Container was sprayed with TaC and let dry. Container has 3x Ta heat shields including center block. Container was loaded into EVAP2 yesterday and pumped down overnight. HS water valves were opened up this morning, no leaks detected. IGP1 = 4.6e-7 Torr. Tapped up manually to 40A. Waited ~25min, Vacuum stable. IGP1 = 5.0e-7 Torr. Initiating auto-ramp. TGHT will be ramped to reach 2000C  Friday, June 05, 2015, 10:01 IGP1 = 4.5e-7 Torr. TGHT = 313A, 4.47V OMEGA = 1444C Increasing ramping rate to 1.0A/min  Friday, June 05, 2015, 11:31 IGP1 = 1.2e-6 Torr. Increasing ramping rate to 2.0A/min    Friday, June 05, 2015, 12:01 TGHT reached to 465A/7.56V, temp is stable at 2000C. Current vac at 1.2e-6 Torr and coming down Cooling down process can be initiated after 4 hours.     Friday, June 05, 2015, 13:21 OMEGA = 1995C Increasing TGHT to 470A to achieve desired max temperature of 2000C Friday, June 05, 2015, 15:59 TGHT sat at max desired temperature of 2000C for ~4hrs. TGHT = 470A, 7.7V Initiating auto-cool at 1.0A/min.  Monday, June 08, 2015, 11:31 Vented in air and opened up this morning. Target container mostly sintered, two tiny patches near both ends not fully sintered. Will re-install and re-sinter next week as another container with priority needs to be sintered first.  Tuesday, June 09, 2015, 10:45 See attachements for 'not-fully-sintered' photos    Wednesday, June 10, 2015, 12:06 After inspecting the target container,  the inner tube surface has "dark" patches, which may not be evenly coated or the coating layer was too think.   See link for photos:  https://www.dropbox.com/sh/m94mjuuodwhz5jb/AADEBv_Kha_p_1An40eftWNHa?dl=0  Attempt to re-spray the container and re-sinter.        Friday, June 12, 2015, 14:58 re-sprayed with second layer of TaC spray this morning. re-loaded into evap2. HS water valves opened, no leaks detected. will ramp-up over weekend.

 Friday, June 12, 2015, 16:07

Vacuum comes down to 6.1e-6 Torr.

Initiated auto-ramping at 0.2A/min for 300A first. 

John Wong wrote:

Laura Lambert wrote: John Wong wrote: Laura Lambert wrote: John Wong wrote: Laura Lambert wrote:  Thursday, June 04, 2015, 9:07 Container was sprayed with TaC and let dry. Container has 3x Ta heat shields including center block. Container was loaded into EVAP2 yesterday and pumped down overnight. HS water valves were opened up this morning, no leaks detected. IGP1 = 4.6e-7 Torr. Tapped up manually to 40A. Waited ~25min, Vacuum stable. IGP1 = 5.0e-7 Torr. Initiating auto-ramp. TGHT will be ramped to reach 2000C  Friday, June 05, 2015, 10:01 IGP1 = 4.5e-7 Torr. TGHT = 313A, 4.47V OMEGA = 1444C Increasing ramping rate to 1.0A/min  Friday, June 05, 2015, 11:31 IGP1 = 1.2e-6 Torr. Increasing ramping rate to 2.0A/min    Friday, June 05, 2015, 12:01 TGHT reached to 465A/7.56V, temp is stable at 2000C. Current vac at 1.2e-6 Torr and coming down Cooling down process can be initiated after 4 hours.     Friday, June 05, 2015, 13:21 OMEGA = 1995C Increasing TGHT to 470A to achieve desired max temperature of 2000C Friday, June 05, 2015, 15:59 TGHT sat at max desired temperature of 2000C for ~4hrs. TGHT = 470A, 7.7V Initiating auto-cool at 1.0A/min.  Monday, June 08, 2015, 11:31 Vented in air and opened up this morning. Target container mostly sintered, two tiny patches near both ends not fully sintered. Will re-install and re-sinter next week as another container with priority needs to be sintered first.  Tuesday, June 09, 2015, 10:45 See attachements for 'not-fully-sintered' photos    Wednesday, June 10, 2015, 12:06 After inspecting the target container,  the inner tube surface has "dark" patches, which may not be evenly coated or the coating layer was too think.   See link for photos:  https://www.dropbox.com/sh/m94mjuuodwhz5jb/AADEBv_Kha_p_1An40eftWNHa?dl=0  Attempt to re-spray the container and re-sinter.        Friday, June 12, 2015, 14:58 re-sprayed with second layer of TaC spray this morning. re-loaded into evap2. HS water valves opened, no leaks detected. will ramp-up over weekend.  Friday, June 12, 2015, 16:07 Vacuum comes down to 6.1e-6 Torr. Initiated auto-ramping at 0.2A/min for 300A first.

Sunday, June 14, 2015, 09:37  

TGHT at 254.2A/3.5V3, DV = 1.614V Temp at 1177C. 

Vacuum is stable at 3.2e-7 Torr.  

Increase ramping rate at 2A/min until TGHT reached 300A. 

Sunday, June 14, 2015, 10:04  

TGHT reached 300A, temp 1368C.

Tapping up to ~1800C

Sunday, June 14, 2015, 11:26 

TGHT at 425A/6.84V, DV 3.59V, temp at 1814C, 

Vacuum coming down, currently at 7.5e-7 Torr. 

Will remain at that current for at least 4 hours before cooling down

Sunday, June 14, 2015, 17:15  

Target container has been sintered with TiC for over 6 hours at 1823C, with TGHT at 425A/6.84V, DV at 3.584V. 

Vac at 4.9e-7 Torr.  

Cooling initiated.  

Chamber can be vented tomorrow and target container can be taken out for inspection. 

 Monday, June 15, 2015, 11:38

Target container was taken out for inspection.  

It's observed that the coated/sintered TaC surface is improved.  The sintered temperature was only gone up just above 1800C, so there still some area near the ends that is still somewhat "brownish", fully sintered shows a

smooth .  (see attachment) 

Spraying into a cylinder tube can be challenging.  It was observed that the coating was dispersed out from the end cap to the centre tube.  For that reason, the container isn't has much protective layer;vthe Ta surface can

react with carbides and the container eventually breaks.  Take the endcap process for example,  the caps are evenly coated with TaC and can be sintered up to 2000C (see e-log Evap ID 202).

Suggestions:  

Using a spray ball nozzle or some sort so that the inner tube can be evenly coated. 

Under investigating...

 Friday, May 29, 2015, 11:21

Total number of foils: 425 discs

Total mass of materials [incl graphite foils]: 44.41g

Total length packed: 12.3cm

Container has no heat shields.

No endcaps inserted to allow outgassing.

Currently being pumped down.

 Friday, May 29, 2015, 14:13

HS water valves opened, no leaks detected.

IGP1 = 5.4e-6 Torr.

Tapping up manually.

Friday, May 29, 2015, 16:48

Tapped up manually to 20A.

IGP1 = 5.9e-6 Torr.

Initiating auto-ramp at 0.2A/min for the TGHT and 0.1A/min for the TBHT.

Max setpoints set to 580A and 230A for the TGHT and TBHT respectively.

Good Vacuum = 3.0e-5 Torr. Bad Vacuum = 4.0e-5 Torr.

 Monday, June 01, 2015, 09:17

IGP1 = 3.8e-6 Torr.

TGHT = 478A.

TBHT reached max setpoint of 230A.

Increasing ramping rate to 0.5A/min.

 Monday, June 01, 2015, 13:15

Checked window for temperature readings, good visibility, no coating on window. 

IGP1 = 9.1e-6 Torr.

TGHT reached max setpoint of 580A 30min ago.

Stepping up manually to a target temperature of 2000C...

 Monday, June 01, 2015, 16:25

IGP1 = 6.5e-6 Torr.

TGHT = 870A, 17.90V

OMEGA = 1948C

Laura Lambert wrote:

Friday, May 29, 2015, 11:21 Total number of foils: 425 discs Total mass of materials [incl graphite foils]: 44.41g Total length packed: 12.3cm Container has no heat shields. No endcaps inserted to allow outgassing. Currently being pumped down.  Friday, May 29, 2015, 14:13 HS water valves opened, no leaks detected. IGP1 = 5.4e-6 Torr. Tapping up manually. Friday, May 29, 2015, 16:48 Tapped up manually to 20A. IGP1 = 5.9e-6 Torr. Initiating auto-ramp at 0.2A/min for the TGHT and 0.1A/min for the TBHT. Max setpoints set to 580A and 230A for the TGHT and TBHT respectively. Good Vacuum = 3.0e-5 Torr. Bad Vacuum = 4.0e-5 Torr.  Monday, June 01, 2015, 09:17 IGP1 = 3.8e-6 Torr. TGHT = 478A. TBHT reached max setpoint of 230A. Increasing ramping rate to 0.5A/min.  Monday, June 01, 2015, 13:15 Checked window for temperature readings, good visibility, no coating on window.  IGP1 = 9.1e-6 Torr. TGHT reached max setpoint of 580A 30min ago. Stepping up manually to a target temperature of 2000C...  Monday, June 01, 2015, 16:25 IGP1 = 6.5e-6 Torr. TGHT = 870A, 17.90V OMEGA = 1948C

 Monday, June 01, 2015, 17:59

After almost an hour at 870A, the temperature went up from 1948C to 1980C; however temperature around the target container/legs are >2000C.  The voltage on the power supply also went up slightly. 

There is a film coated on the window port and that could affect the temp reading.

To be safe, I lowered the TGHT to 830A/17.38V, temp at 1930C. 

Will keep at 830A for 4 hours and cool down this evening. 

Recommend: Using Ta-heat shields for sintering next time.

 Monday, June 01, 2015, 22:55

TGHT at 830A for almost 5 hours.  

TEMP has gone up to 1994C.  Voltage has also gone up to 19V.  

Cooling down at 2A/min for TGHT and 1A/min for TBHT. 

John Wong wrote:

Laura Lambert wrote:  Friday, May 29, 2015, 11:21 Total number of foils: 425 discs Total mass of materials [incl graphite foils]: 44.41g Total length packed: 12.3cm Container has no heat shields. No endcaps inserted to allow outgassing. Currently being pumped down.  Friday, May 29, 2015, 14:13 HS water valves opened, no leaks detected. IGP1 = 5.4e-6 Torr. Tapping up manually. Friday, May 29, 2015, 16:48 Tapped up manually to 20A. IGP1 = 5.9e-6 Torr. Initiating auto-ramp at 0.2A/min for the TGHT and 0.1A/min for the TBHT. Max setpoints set to 580A and 230A for the TGHT and TBHT respectively. Good Vacuum = 3.0e-5 Torr. Bad Vacuum = 4.0e-5 Torr.  Monday, June 01, 2015, 09:17 IGP1 = 3.8e-6 Torr. TGHT = 478A. TBHT reached max setpoint of 230A. Increasing ramping rate to 0.5A/min.  Monday, June 01, 2015, 13:15 Checked window for temperature readings, good visibility, no coating on window.  IGP1 = 9.1e-6 Torr. TGHT reached max setpoint of 580A 30min ago. Stepping up manually to a target temperature of 2000C...  Monday, June 01, 2015, 16:25 IGP1 = 6.5e-6 Torr. TGHT = 870A, 17.90V OMEGA = 1948C    Monday, June 01, 2015, 17:59 After almost an hour at 870A, the temperature went up from 1948C to 1980C; however temperature around the target container/legs are >2000C.  The voltage on the power supply also went up slightly.  There is a film coated on the window port and that could affect the temp reading. To be safe, I lowered the TGHT to 830A/17.38V, temp at 1930C.  Will keep at 830A for 4 hours and cool down this evening.  Recommend: Using Ta-heat shields for sintering next time.  Monday, June 01, 2015, 22:55 TGHT at 830A for almost 5 hours.   TEMP has gone up to 1994C.  Voltage has also gone up to 19V.   Cooling down at 2A/min for TGHT and 1A/min for TBHT.

 Tuesday, June 02, 2015, 12:37

Chamber was vented and the target was inspected. 

Some stressed marks on the target container can be observed.

The container is also slightly curved but otherwise it's fine. 

The materials packed length has expended outward so 3 discs were removed in order to insert the end caps. 

The packed length is now 16cm.

Two extra graphite foils were inserted on both ends, and previously coated/sintered TaC-end caps are inserted and expended. 

Rn foil is inserted & Std solutions are added. 

Ready for test-stand.

Link to photos for more details:

https://www.dropbox.com/sh/0cra7viqs9ro8q3/AADEGk8goGI4c-uzRQSGwWmxa?dl=0

John Wong wrote:

John Wong wrote: Laura Lambert wrote:  Friday, May 29, 2015, 11:21 Total number of foils: 425 discs Total mass of materials [incl graphite foils]: 44.41g Total length packed: 12.3cm Container has no heat shields. No endcaps inserted to allow outgassing. Currently being pumped down.  Friday, May 29, 2015, 14:13 HS water valves opened, no leaks detected. IGP1 = 5.4e-6 Torr. Tapping up manually. Friday, May 29, 2015, 16:48 Tapped up manually to 20A. IGP1 = 5.9e-6 Torr. Initiating auto-ramp at 0.2A/min for the TGHT and 0.1A/min for the TBHT. Max setpoints set to 580A and 230A for the TGHT and TBHT respectively. Good Vacuum = 3.0e-5 Torr. Bad Vacuum = 4.0e-5 Torr.  Monday, June 01, 2015, 09:17 IGP1 = 3.8e-6 Torr. TGHT = 478A. TBHT reached max setpoint of 230A. Increasing ramping rate to 0.5A/min.  Monday, June 01, 2015, 13:15 Checked window for temperature readings, good visibility, no coating on window.  IGP1 = 9.1e-6 Torr. TGHT reached max setpoint of 580A 30min ago. Stepping up manually to a target temperature of 2000C...  Monday, June 01, 2015, 16:25 IGP1 = 6.5e-6 Torr. TGHT = 870A, 17.90V OMEGA = 1948C    Monday, June 01, 2015, 17:59 After almost an hour at 870A, the temperature went up from 1948C to 1980C; however temperature around the target container/legs are >2000C.  The voltage on the power supply also went up slightly.  There is a film coated on the window port and that could affect the temp reading. To be safe, I lowered the TGHT to 830A/17.38V, temp at 1930C.  Will keep at 830A for 4 hours and cool down this evening.  Recommend: Using Ta-heat shields for sintering next time.  Monday, June 01, 2015, 22:55 TGHT at 830A for almost 5 hours.   TEMP has gone up to 1994C.  Voltage has also gone up to 19V.   Cooling down at 2A/min for TGHT and 1A/min for TBHT.     Tuesday, June 02, 2015, 12:37 Chamber was vented and the target was inspected.  Some stressed marks on the target container can be observed. The container is also slightly curved but otherwise it's fine.  The materials packed length has expended outward so 3 discs were removed in order to insert the end caps.  The packed length is now 16cm. Two extra graphite foils were inserted on both ends, and previously coated/sintered TaC-end caps are inserted and expended.  Rn foil is inserted & Std solutions are added.  Ready for test-stand. Link to photos for more details: https://www.dropbox.com/sh/0cra7viqs9ro8q3/AADEGk8goGI4c-uzRQSGwWmxa?dl=0

 see attachment for data recorded during ZrC conditioning 

 Thursday, May 28, 2015, 11:34

Endcaps were sintered [see elog#199]

A Ta foil is placed in the target boat with separate slots for each endcap [see image]

The target boat is wrapped with 3-layers of Ta-heat shield.

The boat is installed in EVAP2, chamber is currently being pumped down.

 Thursday, May 28, 2015, 14:01

HS water valves opened, no leaks detected.

IGP1 = 1.4e-6 Torr.

Initiating manual tap up.

 Thursday, May 28, 2015, 15:10

Manually tapped up TGHT  to 108A, 1.1V

Initiating auto-ramp at 2.0A/min with a max setpoint of 300A

 Thursday, May 28, 2015, 15:22

Hoping to speed up the process...

IGP1 = 1.0e-6 Torr.

Increasing ramping rate to 4.0A/min with a max setpoint of 500A

Final desired temperature = 1800C

Laura Lambert wrote:

Thursday, May 28, 2015, 11:34 Endcaps were sintered [see elog#199] A Ta foil is placed in the target boat with separate slots for each endcap [see image] The target boat is wrapped with 3-layers of Ta-heat shield. The boat is installed in EVAP2, chamber is currently being pumped down.  Thursday, May 28, 2015, 14:01 HS water valves opened, no leaks detected. IGP1 = 1.4e-6 Torr. Initiating manual tap up.  Thursday, May 28, 2015, 15:10 Manually tapped up TGHT  to 108A, 1.1V Initiating auto-ramp at 2.0A/min with a max setpoint of 300A  Thursday, May 28, 2015, 15:22 Hoping to speed up the process... IGP1 = 1.0e-6 Torr. Increasing ramping rate to 4.0A/min with a max setpoint of 500A Final desired temperature = 1800C

 Thursday, May 28, 2015, 17:42

TGHT at 500A. Temp at 1780C.

Increased TGHT to 580A (online operating current),  Temp 1945C, vac 2.9e-6 torr and coming down.  Will remain at that current for the sintering process.

Cooling it down later this evening.

Thursday, May 28, 2015, 21:27  

Temp stabilized at 1960C with TGHT at 580A for almost 4 hours.  Vacuum at 1.8e-7 Torr.

Cooling down initiated at 2A/min.

John Wong wrote:

Laura Lambert wrote:  Thursday, May 28, 2015, 11:34 Endcaps were sintered [see elog#199] A Ta foil is placed in the target boat with separate slots for each endcap [see image] The target boat is wrapped with 3-layers of Ta-heat shield. The boat is installed in EVAP2, chamber is currently being pumped down.  Thursday, May 28, 2015, 14:01 HS water valves opened, no leaks detected. IGP1 = 1.4e-6 Torr. Initiating manual tap up.  Thursday, May 28, 2015, 15:10 Manually tapped up TGHT  to 108A, 1.1V Initiating auto-ramp at 2.0A/min with a max setpoint of 300A  Thursday, May 28, 2015, 15:22 Hoping to speed up the process... IGP1 = 1.0e-6 Torr. Increasing ramping rate to 4.0A/min with a max setpoint of 500A Final desired temperature = 1800C    Thursday, May 28, 2015, 17:42 TGHT at 500A. Temp at 1780C. Increased TGHT to 580A (online operating current),  Temp 1945C, vac 2.9e-6 torr and coming down.  Will remain at that current for the sintering process. Cooling it down later this evening. Thursday, May 28, 2015, 21:27   Temp stabilized at 1960C with TGHT at 580A for almost 4 hours.  Vacuum at 1.8e-7 Torr. Cooling down initiated at 2A/min.

 Friday, May 29, 2015, 11:16

Vented in air and opened up this morning.

Endcaps look great!  

Sintering was spot on [see pictures]

 Tuesday, May 26, 2015, 13:06

Endcaps were sprayed with TaC coating and let dry.

Each endcap is wrapped separately with a sheet of graphite foil and stacked in the target boat [see image]

The target boat is wrapped with 3-layers of Ta-heat shield.

The boat is installed in EVAP2, chamber is currently being pumped down.

 Wednesday, May 27, 2015, 08:50

HS water valves opened, no leaks detected.

Stepped up manually to 35A.

Initiated auto-ramp at 0.2A/min yesterday afternoon.

TGHT = 254A, 3.56V.

IGP1 = 5.9e-7 Torr.

Increasing ramping rate to 1.0A/min with a max setpoint of 400A.

Laura Lambert wrote:

Tuesday, May 26, 2015, 13:06 Endcaps were sprayed with TaC coating and let dry. Each endcap is wrapped separately with a sheet of graphite foil and stacked in the target boat [see image] The target boat is wrapped with 3-layers of Ta-heat shield. The boat is installed in EVAP2, chamber is currently being pumped down.  Wednesday, May 27, 2015, 08:50 HS water valves opened, no leaks detected. Stepped up manually to 35A. Initiated auto-ramp at 0.2A/min yesterday afternoon. TGHT = 254A, 3.56V. IGP1 = 5.9e-7 Torr. Increasing ramping rate to 1.0A/min with a max setpoint of 400A.

 Wednesday, May 27, 2015, 17:51

TGHT has been at 400A for almost 6 hours.  Temp at 1500C.

Cooling down to 0A at 1A/min.

Chamber will be vented to inspect the caps. 

May have to remove the graphite foil wrapped on the caps and re-sintered the caps to 1800C.

John Wong wrote:

Laura Lambert wrote:  Tuesday, May 26, 2015, 13:06 Endcaps were sprayed with TaC coating and let dry. Each endcap is wrapped separately with a sheet of graphite foil and stacked in the target boat [see image] The target boat is wrapped with 3-layers of Ta-heat shield. The boat is installed in EVAP2, chamber is currently being pumped down.  Wednesday, May 27, 2015, 08:50 HS water valves opened, no leaks detected. Stepped up manually to 35A. Initiated auto-ramp at 0.2A/min yesterday afternoon. TGHT = 254A, 3.56V. IGP1 = 5.9e-7 Torr. Increasing ramping rate to 1.0A/min with a max setpoint of 400A.    Wednesday, May 27, 2015, 17:51 TGHT has been at 400A for almost 6 hours.  Temp at 1500C. Cooling down to 0A at 1A/min. Chamber will be vented to inspect the caps.  May have to remove the graphite foil wrapped on the caps and re-sintered the caps to 1800C.

 Thursday, May 28, 2015, 08:13

Vented in air and opened up this morning.

Not fully sintered [see pictures]

 Friday, May 22, 2015, 11:43

A target boat was sprayed with TaC coating and let dry yesterday.

The target boat is wrapped with 3-layers of Ta-heat shield.

The boat was installed in EVAP2, chamber is currently being pumped down.

 Friday, May 22, 2015, 14:22

HS water valves opened, no leaks detected.

IGP1 = 2.4e-6 Torr.

Tapping up manually...

 Friday, May 22, 2015, 14:33

Tapped up to 20A.

Vacuum jumped up to 7e-6 Torr.

Backed off to 5A before vacuum started to drop again.

IGP1 = 5e-6 Torr.

Tapping up manually again...just more slowly...

 Friday, May 22, 2015, 15:31

Tapped up to 12A, unable to tap up very fast due to volatile content in coating.

IGP1 = 3.6e-6 Torr.

Initiating auto-ramp at 0.1A/min with a max current of 580A.

 Monday, May 25, 2015, 09:03

IGP1 = 3e-7 Torr.

TGHT = 397.5A, 6.43V

Increasing ramping rate to 1.0A/min.

Laura Lambert wrote:

Friday, May 22, 2015, 11:43 A target boat was sprayed with TaC coating and let dry yesterday. The target boat is wrapped with 3-layers of Ta-heat shield. The boat was installed in EVAP2, chamber is currently being pumped down.  Friday, May 22, 2015, 14:22 HS water valves opened, no leaks detected. IGP1 = 2.4e-6 Torr. Tapping up manually...  Friday, May 22, 2015, 14:33 Tapped up to 20A. Vacuum jumped up to 7e-6 Torr. Backed off to 5A before vacuum started to drop again. IGP1 = 5e-6 Torr. Tapping up manually again...just more slowly...  Friday, May 22, 2015, 15:31 Tapped up to 12A, unable to tap up very fast due to volatile content in coating. IGP1 = 3.6e-6 Torr. Initiating auto-ramp at 0.1A/min with a max current of 580A.  Monday, May 25, 2015, 09:03 IGP1 = 3e-7 Torr. TGHT = 397.5A, 6.43V Increasing ramping rate to 1.0A/min.

 Monday, May 25, 2015, 17:06

TGHT at been at 580A for over 4 hours.  Cooling down in process at 1A/min. 

John Wong wrote:

Laura Lambert wrote:  Friday, May 22, 2015, 11:43 A target boat was sprayed with TaC coating and let dry yesterday. The target boat is wrapped with 3-layers of Ta-heat shield. The boat was installed in EVAP2, chamber is currently being pumped down.  Friday, May 22, 2015, 14:22 HS water valves opened, no leaks detected. IGP1 = 2.4e-6 Torr. Tapping up manually...  Friday, May 22, 2015, 14:33 Tapped up to 20A. Vacuum jumped up to 7e-6 Torr. Backed off to 5A before vacuum started to drop again. IGP1 = 5e-6 Torr. Tapping up manually again...just more slowly...  Friday, May 22, 2015, 15:31 Tapped up to 12A, unable to tap up very fast due to volatile content in coating. IGP1 = 3.6e-6 Torr. Initiating auto-ramp at 0.1A/min with a max current of 580A.  Monday, May 25, 2015, 09:03 IGP1 = 3e-7 Torr. TGHT = 397.5A, 6.43V Increasing ramping rate to 1.0A/min.    Monday, May 25, 2015, 17:06 TGHT at been at 580A for over 4 hours.  Cooling down in process at 1A/min.

 Vented in air and opened up this morning.

Target boat looks good! fully sintered! 

 Tuesday, May 19, 2015, 13:33

Target container is coated with TaC.  No Ta-heat shields are used.

TGHT will be ramped up to 580A at 0.2A/min.

TBHT will be ramped up to 230A at 0.1A/min.

Chamber is currently being pumped down

 Tuesday, May 19, 2015, 15:04

Opened up HS water, no leaks detected.

Stepped up to 35A.

Waited ~35min, vacuum stable.

IGP1 = 1.7e-6 Torr.

Initiating auto-ramp.

 Wednesday, May 20, 2015, 11:43

IGP1 = 3e-7 Torr.

TGHT = 282A, 3.8V

TBHT = 156A, 2.2V

Increasing ramping rate to 1.0A/min and 0.5A/min for the TGHT and TBHT respectively.

 Thursday, May 21, 2015, 10:42

IGP1 = 2.9e-7

Direct voltage = 5.48V

OMEGA = 1703C.

Initiating auto-cool at 2.0A/min  and 1.0A/min for the TGHT and TBHT.

 Friday, May 22, 2015, 11:41

Vented in air and opened up this morning.

TaC coating fully sintered, looks good! 

 Wednesday, May 13, 2015, 15:21

Three different samples of ZrC are loaded into a target boat.

Sample A: ZrC + NO graphite

Sample B: ZrC + graphite [1:0.5 molar ratio]

Sample C: ZrC + graphite [1:1 molar ratio]

Each sample consists of 20 discs, stacked together and wrapped in graphite sheet

The target boat is wrapped with 3 x Ta heat shield.

EVAP2 pumping down overnight...

 Thursday, May 14, 2015, 08:20

HS water valves opened up this a.m, no leaks detected.

IGP1 = 6.6e-7 Torr

Tapping up manually to 35A.

Good Vacuum = 3.00 e-5 Torr. Bad Vacuum = 4.00 e-5 Torr.

Thursday, May 14, 2015, 09:51

Tapped up manually to 30A.

After ~25min, vacuum gone up to IGP1 = 3.5e-5 Torr!

Backed off to 20A.

Waited ~10min. IGP1 = 1.75e-5 Torr.

Tapped back up to 25A.

Waited ~20min, IGP1 = 1.4e-5 Torr.

Tapped up to 30A.

Waited ~20min, IGP1 = 2.2e-5 Torr.

Tapped up to 35A

Waited ~50min, IGP1 = 2.5e-5 Torr.

Continuing manual tap-up...

 Thursday, May 14, 2015, 13:27

IGP1 = 9e-6 Torr

Tapped up to 40A.

Waited ~45min, IGP1 = 1e-5 Torr

Initiating auto-ramp at 0.1A/min for the TGHT with a max setpoint of 275A/ 8.0V

 Friday, May 15, 2015, 08:25

Max setpoints were changed to 400A/ 8.0V last night.

Reached 400A ~4.5hrs ago.

IGP1 = 4.9e-5 Torr

Initiating manual tap up and recording data.

 Friday, May 15, 2015, 15:50

Samples remained at ~2000C for ~4 hours [see attachment for data]

IGP1 = 7.8e-7 Torr.

Initiating auto-cool at 1.0A/min.

 Tuesday, May 19, 2015, 08:27

Vented in air and opened up this morning.

 Friday, May 01, 2015, 10:27

Four different samples of ZrC are loaded into a target boat.

Sample A: ZrC + NO graphite / hand cut

Sample B: ZrC + NO graphite / laser cut

Sample C: ZrC + graphite / hand cut

Sample D: ZrC + graphite / laser cut

A picture showing the different samples is attached [one face-up/ one face-down sample of each side-by-side]

Each sample consists of ~20-25 discs, stacked together and wrapped in graphite sheet [see attachment for photo]

The target boat is wrapped with 3 x Ta heat shield.

EVAP1 pumped down overnight.

HS water valves were opened this morning, no leaks detected.

IGP1 = 5.5e-7 Torr.

Tapping up TGHT manually to 30A...

 Friday, May 01, 2015, 10:54

Tapped up manually to 30A.

Over the course of 20min the vacuum climbed to IGP1 = 1.0 e-5 Torr.

Backed off TGHT to 20A to allow vacuum to stabilize.

Waited ~10min.

Vacuum dropped to IGP1 = 6.5e-6 Torr.

Tapped back-up manually to 30A.

Waited ~45min.

Vacuum stable, IGP1 = 1.2e-5 Torr.

Initiating auto-ramp at 0.1A/min for the TGHT with a max setpoint of 300A / 5.00V.

Good Vacuum = 3.00e-5 Torr. Bad vacuum = 4.00e-5 Torr.

 Monday, May 04, 2015, 11:17

IGP1 = 2e-7 Torr.

TGHT = 274A, 4.75V

Ramp-up limited to 275A due to max voltage being set at 5.0V

Increased max voltage to 10V

Tapping up manually to 1800C and recording data.

Laura Lambert wrote:

Friday, May 01, 2015, 10:27 Four different samples of ZrC are loaded into a target boat. Sample A: ZrC + NO graphite / hand cut Sample B: ZrC + NO graphite / laser cut Sample C: ZrC + graphite / hand cut Sample D: ZrC + graphite / laser cut A picture showing the different samples is attached [one face-up/ one face-down sample of each side-by-side] Each sample consists of ~20-25 discs, stacked together and wrapped in graphite sheet [see attachment for photo] The target boat is wrapped with 3 x Ta heat shield. EVAP1 pumped down overnight. HS water valves were opened this morning, no leaks detected. IGP1 = 5.5e-7 Torr. Tapping up TGHT manually to 30A...  Friday, May 01, 2015, 10:54 Tapped up manually to 30A. Over the course of 20min the vacuum climbed to IGP1 = 1.0 e-5 Torr. Backed off TGHT to 20A to allow vacuum to stabilize. Waited ~10min. Vacuum dropped to IGP1 = 6.5e-6 Torr. Tapped back-up manually to 30A. Waited ~45min. Vacuum stable, IGP1 = 1.2e-5 Torr. Initiating auto-ramp at 0.1A/min for the TGHT with a max setpoint of 300A / 5.00V. Good Vacuum = 3.00e-5 Torr. Bad vacuum = 4.00e-5 Torr.  Monday, May 04, 2015, 11:17 IGP1 = 2e-7 Torr. TGHT = 274A, 4.75V Ramp-up limited to 275A due to max voltage being set at 5.0V Increased max voltage to 10V Tapping up manually to 1800C and recording data.

 Monday, May 04, 2015, 17:24

Samples have been heated at 1800C for >2 hours. 

Vaccum at 4.3e-7 Torr, TGHT 475A/9.1V. (Direct Vol = 5.3V).

Initiated cooling down process.  Chamber will be vented tomorrow.

 Tuesday, May 05, 2015, 10:22

TGHT reached to 0A. Chamber has already vented. 

Samples will be taken out for examination.

John Wong wrote:

Laura Lambert wrote:  Friday, May 01, 2015, 10:27 Four different samples of ZrC are loaded into a target boat. Sample A: ZrC + NO graphite / hand cut Sample B: ZrC + NO graphite / laser cut Sample C: ZrC + graphite / hand cut Sample D: ZrC + graphite / laser cut A picture showing the different samples is attached [one face-up/ one face-down sample of each side-by-side] Each sample consists of ~20-25 discs, stacked together and wrapped in graphite sheet [see attachment for photo] The target boat is wrapped with 3 x Ta heat shield. EVAP1 pumped down overnight. HS water valves were opened this morning, no leaks detected. IGP1 = 5.5e-7 Torr. Tapping up TGHT manually to 30A...  Friday, May 01, 2015, 10:54 Tapped up manually to 30A. Over the course of 20min the vacuum climbed to IGP1 = 1.0 e-5 Torr. Backed off TGHT to 20A to allow vacuum to stabilize. Waited ~10min. Vacuum dropped to IGP1 = 6.5e-6 Torr. Tapped back-up manually to 30A. Waited ~45min. Vacuum stable, IGP1 = 1.2e-5 Torr. Initiating auto-ramp at 0.1A/min for the TGHT with a max setpoint of 300A / 5.00V. Good Vacuum = 3.00e-5 Torr. Bad vacuum = 4.00e-5 Torr.  Monday, May 04, 2015, 11:17 IGP1 = 2e-7 Torr. TGHT = 274A, 4.75V Ramp-up limited to 275A due to max voltage being set at 5.0V Increased max voltage to 10V Tapping up manually to 1800C and recording data.    Monday, May 04, 2015, 17:24 Samples have been heated at 1800C for >2 hours.  Vaccum at 4.3e-7 Torr, TGHT 475A/9.1V. (Direct Vol = 5.3V). Initiated cooling down process.  Chamber will be vented tomorrow.  Tuesday, May 05, 2015, 10:22 TGHT reached to 0A. Chamber has already vented.  Samples will be taken out for examination.

 Friday, May 08, 2015, 15:55

see attachment for data results.

 Wednesday, May 06, 2015, 13:54

Two different samples of ZrC are wrapped in graphite sheet and loaded into the target boat.

Sample #1 = ZrC

Sample #2 = ZrC+C

Both samples are hand punched with a 18mm die.

The target boat is wrapped with 3x Ta heat shield.

Pumped down this morning.

HS water valves opened, no leaks detected.

IGP1 = 1.5e-6 Torr.

Tapping up manually to 35A...

 Waited ~50min for vacuum to stabilize.

IGP1 = 5.3e-6 Torr.

Initiating auto-ramp at 0.1A/min for the TGHT with a max setpoint of 275A/ 10V

Good vacuum = 3.00e-5 Torr. Bad vacuum = 4.00e-5 Torr.

Wednesday, May 06, 2015, 15:37  

Increasing ramping rate to 0.2A/min

 Thursday, May 07, 2015, 11:15

Stopping auto ramp.

TGHT = 273A.

Tapping up manually and recording data...

IGP1 = 6.6e-7 Torr.

 Thursday, May 07, 2015, 14:21

Increased max voltage to 14V

 Friday, May 08, 2015, 09:33

EVAP2 reached 2000C yesterday evening and remained at max setpoint overnight.

IGP1 = 3.8e-7 Torr

Initiated auto-cool this morning at 2.0A/min.

 Friday, May 08, 2015, 11:32

IGP1 = 2.1e-7 Torr

TGHT = 221A, 3.21V

OMEGA = 1100C

Increasing auto-cool to 5.0A/min.

 Friday, May 08, 2015, 15:53

Vented in air and opened up this afternoon.

See attachment for data results.

 Friday, April 17, 2015, 16:01

Total number of foils: 520 discs

Total mass of materials [incl graphite foils]: 60.2441g

Total length packed: 17.0cm

Container is wrapped with 3x Ta-heat shields.

No endcaps inserted to allow outgasing.

Currently being pumped down.

 Monday, April 20, 2015, 11:08

Target container is coated with TaC and wrapped with 3-Ta heat shields, not incl center block.

TGHT and TBHT will be ramped up to 820A and 230A, respectively.

Chamber pumped down over the weekend.

IGP1 = 2.1e-7 Torr.

HS cooling water valves opened; no leaks detected.

TGHT max voltage = 18V, TBHT max voltage = 5V

....

attempted to start stepping up manually.

power supply not responding to epics controls for TBHT only...looking into problems now...

 Monday, April 20, 2015, 16:06

Epics is working.

Power supply connections unplugged/plugged back in.

Everything working again.

Tapped up manually to 40A.

Waited ~1hr30 for vacuum to stabilize.

IGP1 = 1.8e-6 Torr.

Good vac = 3e-5 Torr. Bad vac = 4e-5 Torr.

TGHT and TBHT will be ramped up to 820A and 230A, respectively.

Initiating auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively.

 Wednesday, April 22, 2015, 15:23

TGHT = 200A, 2.26V; TBHT = 117A, 1.58V

IGP1 = 9.8e-6 Torr.

Increasing auto-ramp to 0.4A/min and 0.2A/min for the TGHT and TBHT respectively.

Laura Lambert wrote:

Friday, April 17, 2015, 16:01 Total number of foils: 520 discs Total mass of materials [incl graphite foils]: 60.2441g Total length packed: 17.0cm Container is wrapped with 3x Ta-heat shields. No endcaps inserted to allow outgasing. Currently being pumped down.  Monday, April 20, 2015, 11:08 Target container is coated with TaC and wrapped with 3-Ta heat shields, not incl center block. TGHT and TBHT will be ramped up to 820A and 230A, respectively. Chamber pumped down over the weekend. IGP1 = 2.1e-7 Torr. HS cooling water valves opened; no leaks detected. TGHT max voltage = 18V, TBHT max voltage = 5V .... attempted to start stepping up manually. power supply not responding to epics controls for TBHT only...looking into problems now...  Monday, April 20, 2015, 16:06 Epics is working. Power supply connections unplugged/plugged back in. Everything working again. Tapped up manually to 40A. Waited ~1hr30 for vacuum to stabilize. IGP1 = 1.8e-6 Torr. Good vac = 3e-5 Torr. Bad vac = 4e-5 Torr. TGHT and TBHT will be ramped up to 820A and 230A, respectively. Initiating auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively.  Wednesday, April 22, 2015, 15:23 TGHT = 200A, 2.26V; TBHT = 117A, 1.58V IGP1 = 9.8e-6 Torr. Increasing auto-ramp to 0.4A/min and 0.2A/min for the TGHT and TBHT respectively.

 Thursday, April 23, 2015, 10:15

Vac at 2.e-6 Torr.  Increased TGHT ramping rate to 1.0A/min.  Current temperature at 1443C, TGHT at 641A, TBHT at 230A.

 Thursday, April 23, 2015, 15:02

Evap#2 window for the temp reader is now coated, so temp reading is not available.  (see attachment). 

TGHT has been at 820A/13.45V for almost 2 hours, will continue to heat at this current for a few more hours.  Will initiate the cooling process from home…  

 Thursday, April 23, 2015, 22:31

Target has been heated at 820A for about 9.5hrs.  Current vacuum at 4.7e-7 Torr.

Initiating cooling process at -2A/min for TGHT and -1A/min for TBHT.

Friday, April 24, 2015, 10:13  

Target has been cooled at 0A for about 5 hours.  Chamber is currently being vented and the target will be taken out for inspection.

Friday, April 24, 2015, 12:37  

The target was inspected.  

Some yellow crystals were form around the ends but they were easily removed this time.  

With both ends open during the sintering process and shorten the target length with 1cm space of both side, the target is looking a lot better.  

 No visible damage on the target surface.  

Inside, the channel has a clear pathway, and the discs are nicely aligned.  

End caps and Rh foils are inserted - It's ready for assembly.

See link for pics after the sintering process.

https://www.dropbox.com/sh/w5k4l3fezfat2cm/AAAyX67zyUPUVvN_WzEHFXM2a?dl=0

 Thursday, April 09, 2015, 09:33

Target container is coated with TaC and wrapped with 3-Ta heat shields, not incl center block.

TGHT and TBHT will be ramped up to 820A and 230A, respectively.

Chamber pumped down overnight.

IGP1 = 5.2e-7 Torr.

HS cooling water valves opened; no leaks detected.

TGHT max voltage = 18V, TBHT max voltage = 5V

Stepping TGHT and TBHT up to 35A...

 Thursday, April 09, 2015, 10:07

Waited ~20min, vacuum stable.

IGP1 = 5.3e-7 Torr.

Good vac = 3e-5 Torr. Bad vac = 4e-5 Torr.

Auto-ramp initiated at 0.2A/min.

 Monday, April 13, 2015, 09:06

Reached max setpoints sunday morning [see attached photo for striptool].

Internal temperature measured with OMEGA  = 1965C

IGP1 = 4.4e-7 Torr,

Initiating auto cool for TGHT and TBHT at 2.0A/min and 1.0A/min respectively.

 Tuesday, April 14, 2015, 14:12

Vented in air and opened up this morning.

Fully sintered.

 Monday, March 09, 2015, 16:47

Target consists of 400 discs.

Total packed length 3.4cm

Total mass 45.8181g

Re foil inserted.

Chamber is currently being pumped down.

No Ta-heat shield wrapped.

One end-cap inserted on left (wrt ionizer into the page)

TGHT and TBHT will be ramped up to 820A/230A respectively at 2.0A/min.

 Tuesday, March 10, 2015, 10:28

HS water valves opened, no leaks detected.

IGP1 = 4.5e-7 Torr.

Power supply not responding to epics...AGAIN. grrrr 

Tuesday, March 10, 2015, 13:17  

IOC was rebooted - back up and running again! yay! 

IGP1 = 4.0e-7 Torr.

Tapped up manually to 35A, waited ~30min, vaccuum stable.

Initiating auto-ramp.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Wednesday, March 11, 2015, 09:11

Target has been at max setpoints for ~14hrs.

OMEGA = 1472C

TGHT = 820A, 12.85V

TBHT = 230A, 3.696V

IGP1 = 5.5ee-7 Torr

Manually tapping up to obtain hotter internal temperature...

 Wednesday, March 11, 2015, 11:33

Current conditions:

OMEGA = 1565C

TGHT = 900A, 14.3V

TBHT = 230A, 3.7V

IGP1 = 6.3e-7 Torr

Digital pyrometer readings:

Hottest point on left leg, WRT ionizer tube into page = 2400C

Internal temp of container = 1580C

Sat at this temperature ~45min.

Initiating auto-cool at TGHT 2.0A/min, TBHT 1.0A/min

[See attached photo for collected data]

 Thursday, March 12, 2015, 13:12

vented and opened up this morning.

only reached a max internal temp of 1580C.

therefore added 3xTa heat shield and will re-condition at a higher temp.

currently pumping back down.

 Thursday, March 12, 2015, 14:34

IGP1 = 7.0e-7 Torr

stepped up to 35A, waited ~30min, vacuum stable.

IGP1 = 6.1e-7 Torr

Initating ramp-up...

 Friday, March 13, 2015, 07:47

IGP1 = 2.9e-7 Torr

reached max set points for TGHT = 600A, TBHT = 230A

Initiating manual tap-up.

 Friday, March 13, 2015, 10:31

Reached 720A, 1800C at 0850

Will continue to heat for ~3hrs

[see attachment for collected data]

 Friday, March 13, 2015, 12:00

Sat at max temperature, 1800C, for 3 hours.

Initiating auto-cool at 2.0A/min for TGHT and 1.0A/min for TBHT.

Laura Lambert wrote:

Monday, March 09, 2015, 16:47 Target consists of 400 discs. Total packed length 3.4cm Total mass 45.8181g Re foil inserted. Chamber is currently being pumped down. No Ta-heat shield wrapped. One end-cap inserted on left (wrt ionizer into the page) TGHT and TBHT will be ramped up to 820A/230A respectively at 2.0A/min.  Tuesday, March 10, 2015, 10:28 HS water valves opened, no leaks detected. IGP1 = 4.5e-7 Torr. Power supply not responding to epics...AGAIN. grrrr  Tuesday, March 10, 2015, 13:17   IOC was rebooted - back up and running again! yay!  IGP1 = 4.0e-7 Torr. Tapped up manually to 35A, waited ~30min, vaccuum stable. Initiating auto-ramp. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.  Wednesday, March 11, 2015, 09:11 Target has been at max setpoints for ~14hrs. OMEGA = 1472C TGHT = 820A, 12.85V TBHT = 230A, 3.696V IGP1 = 5.5ee-7 Torr Manually tapping up to obtain hotter internal temperature...  Wednesday, March 11, 2015, 11:33 Current conditions: OMEGA = 1565C TGHT = 900A, 14.3V TBHT = 230A, 3.7V IGP1 = 6.3e-7 Torr Digital pyrometer readings: Hottest point on left leg, WRT ionizer tube into page = 2400C Internal temp of container = 1580C Sat at this temperature ~45min. Initiating auto-cool at TGHT 2.0A/min, TBHT 1.0A/min [See attached photo for collected data]  Thursday, March 12, 2015, 13:12 vented and opened up this morning. only reached a max internal temp of 1580C. therefore added 3xTa heat shield and will re-condition at a higher temp. currently pumping back down.  Thursday, March 12, 2015, 14:34 IGP1 = 7.0e-7 Torr stepped up to 35A, waited ~30min, vacuum stable. IGP1 = 6.1e-7 Torr Initating ramp-up...  Friday, March 13, 2015, 07:47 IGP1 = 2.9e-7 Torr reached max set points for TGHT = 600A, TBHT = 230A Initiating manual tap-up.  Friday, March 13, 2015, 10:31 Reached 720A, 1800C at 0850 Will continue to heat for ~3hrs [see attachment for collected data]  Friday, March 13, 2015, 12:00 Sat at max temperature, 1800C, for 3 hours. Initiating auto-cool at 2.0A/min for TGHT and 1.0A/min for TBHT.

 Monday, March 16, 2015, 17:30

Target was removed from Evap#2.  It was successfully conditioned. 

The other end cap was inserted and expended. 

Standard salts were added.   And Re foil is inserted. 

Target is ready for assembly.