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.

 Thursday, February 19, 2015, 15:19

Target container coated with TaC, loaded in EVAP2.

No Ta heat shields.

Will pump down over the weekend.

 Monday, February 23, 2015, 10:22

IGP1  = 1.75e-7 Torr

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

TBHT will be ramped up to 230A at 0.2A/min

evap2 power supply not responding to epics controls...waiting on fix

 Wednesday, February 25, 2015, 16:05

controls now fixed.

danceioc1 involving evap ioc will be updated tomorrow by controls.

once ioc update complete will ramp up.

 Friday, February 27, 2015, 09:34

ioc update complete yesterday afternoon.

IGP1 = 1.1e-7

initiating ramp up...

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

 Monday, March 02, 2015, 09:01

IGP1 = 2.5e-7 Torr

TGHT = 578A

TBHT = 232A

OMEGA = 1750C

Increasing to 1800C

 Monday, March 02, 2015, 10:42

Reached 1800C at 10:30

TGHT = 603A

TBHT = 232A

IGP1 = 2.8e-7 Torr

 Monday, March 02, 2015, 14:26

Sat at max set point for 4hrs.

IGP1 = 2.7e-7 Torr.

Initiating auto-cool, TGHT @ 2A/min, TBHT @ 1A/min.

 Tuesday, March 03, 2015, 09:17

vented and opened this a.m.

target container looks good, TaC coating fully sintered.

 Wednesday, February 11, 2015, 16:10

Container loaded into EVAP2.

3xTa heat shields.

Chamber currently being pumped down.

TGHT/ TBHT will be ramped up to 580A/ 230A or 1800C tapped up manually.

 Thursday, February 12, 2015, 09:39

HS water valves opened, no leaks detected.
Tapping up manually.

 Thursday, February 12, 2015, 12:07

OMEGA reached 1805C; TGHT = 415A, TBHT = 205A

Will continue to tap up manually to 2000C

 Thursday, February 12, 2015, 15:19

Reached TGHT = 500A, TBHT = 230A, OMEGA = 2035C.

Sat for ~2hrs.

Tapping up a further 25A on the TGHT.

 Thursday, February 12, 2015, 16:05

Tapped up manually to:

OMEGA = 2250C

DV = 5.65V

TGHT = 580A

TBHT = 230A

Friday, February 13, 2015, 10:05

Reached max setpoint last night.

Voltage starting to increase at contant TGHT @ 580A.  Lower TGHT to 525A, temp at 2150C (time 6:30pm) 

Initiating manual cool down.

Friday, February 13, 2015, 15:31

vented and opened up this afternoon.

everything looked good, container not broken! graphite insert looked good! the container was slightly bent, but nothing of significance.

however, the graphite insert bonded to the container so it was not taken out in one piece...

 Tuesday, February 10, 2015, 14:00

Container loaded into EVAP2 at noon.

no heat shields.

Chamber currently being pumped down.

TGHT/ TBHT will be ramped up to 580A/ 230A, tapped up manually.

 Tuesday, February 10, 2015, 14:39

HS water valves opened, no leaks detected.

Tapping up manually / recording data in excel

 Wednesday, February 11, 2015, 11:24

Reached max set points yesterday early evening.

Tapped down manually this a.m.

Will vent and open this afternoon.

 Wednesday, February 11, 2015, 15:54

Took out this afternoon.

container looks good.

graphite insert removed/ inspected - not much change, slightly lighter in colour.

[see attachments for graphs/ table]

Monday, February 02, 2015, 16:28

Container is coated with TaC.  No Ta foil wrapped around. 

Chamber is being pumped down.

TGHT/TBHT will be ramped up to 580A/230A at 0.2A/min.

John Wong wrote:

Monday, February 02, 2015, 16:28 Container is coated with TaC.  No Ta foil wrapped around.  Chamber is being pumped down. TGHT/TBHT will be ramped up to 580A/230A at 0.2A/min.

 Tuesday, February 03, 2015, 10:28

HS water valves opened; no leaks detected.

IGP1 = 5.9e-7 Torr

 Wednesday, February 04, 2015, 11:10

attempted to initiate manual ramp up of TGHT and TBHT yesterday, but not responding to EPICS

currently sitting under vacuum, waiting on fix...

 Wednesday, February 04, 2015, 14:16

controls fixed.

initiated auto-ramp.

 Thursday, February 05, 2015, 08:56

IGP1 = 4.1e-7 Torr

TGHT = 290A

TBHT = 225A

Increasing auto-ramp to 1.0A/min

 Thursday, February 05, 2015, 13:49

IGP1 = 1.4e-6 Torr

TGHT = 569A

TBHT = 232A

Increasing auto-ramp to 2.0A/min

Laura Lambert wrote:

John Wong wrote: Monday, February 02, 2015, 16:28 Container is coated with TaC.  No Ta foil wrapped around.  Chamber is being pumped down. TGHT/TBHT will be ramped up to 580A/230A at 0.2A/min.      Tuesday, February 03, 2015, 10:28 HS water valves opened; no leaks detected. IGP1 = 5.9e-7 Torr  Wednesday, February 04, 2015, 11:10 attempted to initiate manual ramp up of TGHT and TBHT yesterday, but not responding to EPICS currently sitting under vacuum, waiting on fix...  Wednesday, February 04, 2015, 14:16 controls fixed. initiated auto-ramp.  Thursday, February 05, 2015, 08:56 IGP1 = 4.1e-7 Torr TGHT = 290A TBHT = 225A Increasing auto-ramp to 1.0A/min  Thursday, February 05, 2015, 13:49 IGP1 = 1.4e-6 Torr TGHT = 569A TBHT = 232A Increasing auto-ramp to 2.0A/min

 Thursday, February 05, 2015, 18:02

Auto-cooling TGHT to 400A at 1A/min.  Need to take voltage reading tomorrow. 

John Wong wrote:

Laura Lambert wrote: John Wong wrote: Monday, February 02, 2015, 16:28 Container is coated with TaC.  No Ta foil wrapped around.  Chamber is being pumped down. TGHT/TBHT will be ramped up to 580A/230A at 0.2A/min.      Tuesday, February 03, 2015, 10:28 HS water valves opened; no leaks detected. IGP1 = 5.9e-7 Torr  Wednesday, February 04, 2015, 11:10 attempted to initiate manual ramp up of TGHT and TBHT yesterday, but not responding to EPICS currently sitting under vacuum, waiting on fix...  Wednesday, February 04, 2015, 14:16 controls fixed. initiated auto-ramp.  Thursday, February 05, 2015, 08:56 IGP1 = 4.1e-7 Torr TGHT = 290A TBHT = 225A Increasing auto-ramp to 1.0A/min  Thursday, February 05, 2015, 13:49 IGP1 = 1.4e-6 Torr TGHT = 569A TBHT = 232A Increasing auto-ramp to 2.0A/min    Thursday, February 05, 2015, 18:02 Auto-cooling TGHT to 400A at 1A/min.  Need to take voltage reading tomorrow.

 Tuesday, February 10, 2015, 09:35

Vented and opened this morning.

Container fully sintered.

 See previous e-log entry for details

 Wednesday, January 14, 2015, 13:46: Roughing

Wednesday, January 14, 2015, 14:57: Starting turbo

Monday, January 19, 2015, 13

Water opened up to one circuit at at time. No response on the vacuum could be seen.

IGP1 at 1.7E-7 T

IGP2 at 3E-8 T

Tuesday, January 20, 2015, 13:11: Stopped turbo and roughing pump.

Wednesday, January 21, 2015, 15:46: Venting

Rick and Anders found CG1A to be reading too high a value. A borrowed gauge from the vacuum group confirmed this. A new gauge will be installed

Thursday, January 22, 2015, 14:06: Roughing

Thursday, January 22, 2015, 14:18: Venting

The reading is consistent between CG1A and CG1B, which simplifies pump down.

 Thursday, December 11, 2014, 10:17

water supply and return valves closed for lab closure over the holidays.

all taps leading into evap2 have been closed.

evap2 was fully flushed leaving no water left inside the system.