Laura Lambert wrote:

John Wong wrote:  Friday, March 21, 2014, 16:09 Target container is loaded with 360 Discs of TiC.   Target length = 11.7cm.   Total green mass = 40.945g  Container is wrapped with 3 Ta-heat shields, and have been pumped down in the chamber.  For the sintering process:  TGHT ramp up to 820A, and TGHT to 300A at 0.1A/min.  Friday, March 21, 2014, 16:15 TGHT/TBHT were manually stepped up to 40A.   Vac stabilizes at 1.7e-6 Torr.   Initiate auto-ramping...     Wednesday, March 26, 2014, 11:05 TBHT reached max desired current of 300A IGP1 = 1.4e-6 Torr TGHT = 543A Increasing TGHT auto-ramp to 2.0A/min

 Wednesday, March 26, 2014, 18:18

TGHT has reached to 820A\13.4V and target has been heated at that current for 4.5 hours.

Vac is coming down to 1.1e-6 Torr.

See link for RGA results: https://www.dropbox.com/sh/08dcxskux21aqap/1SF_dTJB4l

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

 Thursday, March 27, 2014, 11:14

Target is cooled down.  TGHT/TBHT have reached to 0A. 

All pumps off; chamber will be vented soon. 

 Friday, March 28, 2014, 15:00

Target has been assembled.  Heat shield WO#39956-10

Tuesday, October 16, 2012, 14:12

Target is filled with 360 discs of TiC (with 1 mole of graphite) backed on C-grv foil.  

No Ta heat-shields wrapped around the container.

One regular end-cap is inserted and expanded.  The other end is inserted with a D-cap for out-gassing.

Re ionizer foil is inserted.

TGHT will be ramped up to 580A, TBHT to 230A; ramping rate at 0.2A/min.

Chamber is currently being pumped down...

 Tuesday, October 16, 2012, 16:11

HS water valve is opened.  No leaks is detected.

Vacuum is coming down steadily.  IGP1 currently at 1.7e-5 Torr.

 Wednesday, October 17, 2012, 11:41

The chamber was pumped down overnight.  IGP1 reads at 5.8e-7 Torr.

Both TGHT & TBHT were stepped up to 30A. P/S OK! 

Initiated auto-ramping...

Monday, October 22, 2012, 10:58

TGHT and TBHT have reached to 580A & 230A, respectively (see attachment#1).

IGP1 currently at 6.27e-6 Torr.  BP@20mTorr.

Currents will remain at max for another 3 hours. 

Local temperature measured at 1500C (container surface), 1300C (center block)

 Monday, October 22, 2012, 17:27

Auto cooling initiated.

 Tuesday, October 23, 2012, 17:54

TGHT & TBHT are at 0A.  P/S & pumps off. 

The chamber will be vented, and the target will be taken out for inspections.

 Friday, March 21, 2014, 16:09

Target container is loaded with 360 Discs of TiC.  

Target length = 11.7cm.  

Total green mass = 40.945g 

Container is wrapped with 3 Ta-heat shields, and have been pumped down in the chamber. 

For the sintering process: 

TGHT ramp up to 820A, and TGHT to 300A at 0.1A/min. 

Friday, March 21, 2014, 16:15

TGHT/TBHT were manually stepped up to 40A.  

Vac stabilizes at 1.7e-6 Torr.  

Initiate auto-ramping... 

John Wong wrote:

Friday, March 21, 2014, 16:09 Target container is loaded with 360 Discs of TiC.   Target length = 11.7cm.   Total green mass = 40.945g  Container is wrapped with 3 Ta-heat shields, and have been pumped down in the chamber.  For the sintering process:  TGHT ramp up to 820A, and TGHT to 300A at 0.1A/min.  Friday, March 21, 2014, 16:15 TGHT/TBHT were manually stepped up to 40A.   Vac stabilizes at 1.7e-6 Torr.   Initiate auto-ramping...

 Wednesday, March 26, 2014, 11:05

TBHT reached max desired current of 300A

IGP1 = 1.4e-6 Torr

TGHT = 543A

Increasing TGHT auto-ramp to 2.0A/min

John Wong wrote:

Laura Lambert wrote: John Wong wrote:  Wednesday, October 21, 2015, 17:35 This container is prepared for a backup UCx target (otherwise it will be used for development purposes). The container is coated with TaC; one layer of Ta-heat shield is used.  TGHT will be ramped up to reach 1900C (previous container had TGHT ramped up to 440A).   TBHT will be ramped up to max 230A.   Chamber is currently being pumped down.   Heating can begin once the vacuum is good, currently at 4.8e-5 Torr.     Thursday, October 22, 2015, 11:36 HS water valves opened, no leaks detected. Tapped up manually to 35A. Vacuum stabilized, initiated auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively. Final setpoints TGHT = 300A, TBHT = 230A IGP1 = 1.0e-6 Torr; TGHT = 45.18A, 0.17V; TBHT = 38.4A, 0.41V    Thursday, October 22, 2015, 17:09 Pressure coming down to 1.5e-6 Torr.  Increased ramping rate to 2A/min for both TGHT and TBHT.

 Monday, October 26, 2015, 16:10

Target container was ramped down over the weekend and taken out today.

Coating looks good.

Will add on another Ta layer and continue with temperature measurements.

See attachment for raw data.

 Wednesday, October 21, 2015, 17:35

This container is prepared for a backup UCx target (otherwise it will be used for development purposes).

The container is coated with TaC; one layer of Ta-heat shield is used. 

TGHT will be ramped up to reach 1900C (previous container had TGHT ramped up to 440A).  

TBHT will be ramped up to max 230A.  

Chamber is currently being pumped down.  

Heating can begin once the vacuum is good, currently at 4.8e-5 Torr. 

 Friday, October 23, 2015, 16:15

TGHT reached to 500A and temp measured at 1940C.  More about the temp plot can be found in the dropbox.

Initiated cooling down at 2A/min. 

Target will be inspected next Monday.

John Wong wrote:

Wednesday, October 21, 2015, 17:35 This container is prepared for a backup UCx target (otherwise it will be used for development purposes). The container is coated with TaC; one layer of Ta-heat shield is used.  TGHT will be ramped up to reach 1900C (previous container had TGHT ramped up to 440A).   TBHT will be ramped up to max 230A.   Chamber is currently being pumped down.   Heating can begin once the vacuum is good, currently at 4.8e-5 Torr.

 Thursday, October 22, 2015, 11:36

HS water valves opened, no leaks detected.

Tapped up manually to 35A.

Vacuum stabilized, initiated auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively.

Final setpoints TGHT = 300A, TBHT = 230A

IGP1 = 1.0e-6 Torr; TGHT = 45.18A, 0.17V; TBHT = 38.4A, 0.41V

Laura Lambert wrote:

John Wong wrote:  Wednesday, October 21, 2015, 17:35 This container is prepared for a backup UCx target (otherwise it will be used for development purposes). The container is coated with TaC; one layer of Ta-heat shield is used.  TGHT will be ramped up to reach 1900C (previous container had TGHT ramped up to 440A).   TBHT will be ramped up to max 230A.   Chamber is currently being pumped down.   Heating can begin once the vacuum is good, currently at 4.8e-5 Torr.     Thursday, October 22, 2015, 11:36 HS water valves opened, no leaks detected. Tapped up manually to 35A. Vacuum stabilized, initiated auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively. Final setpoints TGHT = 300A, TBHT = 230A IGP1 = 1.0e-6 Torr; TGHT = 45.18A, 0.17V; TBHT = 38.4A, 0.41V

 Thursday, October 22, 2015, 17:09

Pressure coming down to 1.5e-6 Torr. 

Increased ramping rate to 2A/min for both TGHT and TBHT.

 Monday, February 18, 2013, 16:28

The RFQ target container is coated with TaC and ready to be sintered.  No Ta-heat shields are used.  This container will be used for the SiC#28-LPSIS-RFQ. 

Two thermocouples are welded on the container:  One on the end cap and the other on the back block (see attachment#1)

The target will be heated to at least  TGHT at 580A and TBHT at 300A; the vacuum and gasses will be monitored.  

The chamber is currently being pumped down...  

 Friday, February 22, 2013, 14:24

The gasses were analyzed with the RGA:

TGHT @ 520A, TBHT @ 300A:  Mass 28 (CO) reached to max current of ~5pA before the current started to decrease, (see attachment #2).  This could be the indication of the material(s) in the target container was "sort of" fully reduced. 

TGHT was further ramped up  to 600A and heated for a few hours.  The temperature on the end was measured at 1252C and the center block was at 1580C.  (see attachment #3).

The container was successfully sintered with TaC. 

 Tuesday, November 21, 2017, 12:01

Boat coated with TaC using 'flushing technique' and let dry overnight.

Wrapped with 1 long Ta heat shield 3x

Loaded into evap2 just before lunch

IGP1 = 7.1e-6 Torr

OMEGA slope = 0.98

Good vac at 3.0e-4, bad vac at 8.0e-4 Torr.

HS water valves have remained open since the last time evap2 was used.

No leak check done.

Tapped up manually to 35A.

Waited ~25min

Vacuum stable.

IGP1 = 1.15e-5 Torr

IGP2 = 1.17e-5 Torr

Initiating auto ramp for TGHT @ 0.2A/min to a max setpoint of 300A

Once max setpoints achieved, will tap up manually to final desired temperature of 1900C

 Wednesday, November 22, 2017, 09:32

TGHT = 270A, 4.15V

OMEGA = 1285C

IGP1 = 1.23e-6 Torr

IGP2 = 1.13e-6 Torr

Vacuum stable.

Increasing ramping rate to 1.0A/min and final setpoint to 350A

 Wednesday, November 22, 2017, 10:25

TGHT = 325A, 5.15V

OMEGA = 1500C

IGP1 = 2.80e-6 Torr

IGP2 = 2.93e-6 Torr

Vacuum stable.

Increasing ramping rate to 1.5A/min and final setpoint to 400A

 Wednesday, November 22, 2017, 10:49

TGHT = 350A, 5.60V

OMEGA = 1580C

IGP1 = 4.5e-6 Torr

IGP2 = 4.9e-6 Torr

Vacuum stable.

Increasing ramping rate to 2.0A/min

 Wednesday, November 22, 2017, 11:18

TGHT = 400A, 6.64V

OMEGA = 1734C

IGP1 = 5.8e-6 Torr

IGP2 = 6.2e-6 Torr

Vacuum stable.

Increasing final setpoint to 450A.

 Wednesday, November 22, 2017, 15:59

TGHT = 460A, 8.07V

OMEGA = 1898C

IGP1 = 1.34e-6 Torr

IGP2 = 1.27e-6 Torr

Sintering process complete.

Remained at max setpoints for just over 4hrs.

Initiating auto-cool at 2.0A/min.

 Thursday, November 23, 2017, 13:09

Removed from evap2 this morning.

Coating looks good.

 Wednesday, April 05, 2017, 15:36

Coated container with TaC coating using spray technique this morning and let dry.

Wrapped with one long layer of Ta heat shield, wrapped around boat 3x

No ends to target boat

Installed in evap2 and pumping down now...

Laura Lambert wrote:

Wednesday, April 05, 2017, 15:36 Coated container with TaC coating using spray technique this morning and let dry. Wrapped with one long layer of Ta heat shield, wrapped around boat 3x No ends to target boat Installed in evap2 and pumping down now...

 Thursday, April 06, 2017, 08:56

Problems with IGP2

Won't turn on, has low voltage output.

See screenshot attached.

Laura Lambert wrote:

Laura Lambert wrote:  Wednesday, April 05, 2017, 15:36 Coated container with TaC coating using spray technique this morning and let dry. Wrapped with one long layer of Ta heat shield, wrapped around boat 3x No ends to target boat Installed in evap2 and pumping down now...    Thursday, April 06, 2017, 08:56 Problems with IGP2 Won't turn on, has low voltage output. See screenshot attached.

 Thursday, April 06, 2017, 11:12

Turns out it was just a bad connection.

See attached photos.

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote:  Wednesday, April 05, 2017, 15:36 Coated container with TaC coating using spray technique this morning and let dry. Wrapped with one long layer of Ta heat shield, wrapped around boat 3x No ends to target boat Installed in evap2 and pumping down now...    Thursday, April 06, 2017, 08:56 Problems with IGP2 Won't turn on, has low voltage output. See screenshot attached.    Thursday, April 06, 2017, 11:12 Turns out it was just a bad connection. See attached photos.

Thursday, April 06, 2017, 13:16

HS water valves opened, no leaks detected.

Tapped up manually to 35A

Waited almost 2hrs

IGP1 = 9.9e-7 Torr

Initiating auto-ramp at 0.2A/min to 400A

Final desired temperature = 1900C

OMEGA slope = 0.98

Good vac at 3.0e-5, bad vac at 4.0e-5 Torr.

 Monday, April 10, 2017, 09:26

IGP1 = 1.79e-7 Torr

TGHT = 400A, 6.47V

OMEGA = 1505C

Tapping up manually to 1900C...

 Monday, April 10, 2017, 11:46

TGHT tripped off at 410A, ~1530C

Water is still on and good flow.

Vacuum was stable ~1.8e-7 Torr.

No power trips according to controls.

Not sure of reasoning behind trip.

Initially tried tapping back-up, no current was being applied.

Turned off and back on TGHT power supply - this restarted things and now works again.

Have tapped back up to 35A, vacuum still good.

Restarting auto-ramp to 400A at 1.0A/min

 Monday, April 10, 2017, 13:13

Vacuum looks good.

IGP1 = 1.1e-7 Torr

TGHT = 127A, 1.30V

Increasing ramping rate to 2.0A/min

 Monday, April 10, 2017, 16:08

IGP1 = 1.5e-7 Torr

TGHT = 400A, 6.24V

OMEGA = 1510V

Increasing auto ramp setpoint to 450A at a rate of 0.2A/min

 Wednesday, April 12, 2017, 11:06

IGP1 = 2.96e-7 Torr

TGHT = 555A, 9.74V

OMEGA = 1935C

Has remained at max setpoints overnight.

Initiating auto-cool at 2.0A/min

 Thursday, April 13, 2017, 11:59

vented in air and opened up this morning.

container looks good.

see photo attached.

 Thursday, December 07, 2017, 09:57

Each endcap is wrapped in a separate piece of graphite foil and placed in a target boat.

There are also 4 coated springs, 2 on each side of the stack of endcaps.

The boat is wrapped with 3-layers of Ta heatshields.

Chamber pumped down overnight.

OMEGA slope = 0.98

HS water valves opened, no leaks detected.

IGP1 = 5.9e-7 Torr

IGP2 = 4.0e-7 Torr

Tapping up manually.

Final desired temperature = 1800C

Laura Lambert wrote:

Thursday, December 07, 2017, 09:57 Each endcap is wrapped in a separate piece of graphite foil and placed in a target boat. There are also 4 coated springs, 2 on each side of the stack of endcaps. The boat is wrapped with 3-layers of Ta heatshields. Chamber pumped down overnight. OMEGA slope = 0.98 HS water valves opened, no leaks detected. IGP1 = 5.9e-7 Torr IGP2 = 4.0e-7 Torr Tapping up manually. Final desired temperature = 1800C

 Thursday, December 07, 2017, 11:51

TGHT tripped off.

Turns out the vacuum limits have not been fully updated when they should have been and the old ones still apply.

IGP1 reached 8e-5 Torr which tripped off the system.

TGHT = 80A, 1.05V when the system tripped.

Laura Lambert wrote:

Laura Lambert wrote:  Thursday, December 07, 2017, 09:57 Each endcap is wrapped in a separate piece of graphite foil and placed in a target boat. There are also 4 coated springs, 2 on each side of the stack of endcaps. The boat is wrapped with 3-layers of Ta heatshields. Chamber pumped down overnight. OMEGA slope = 0.98 HS water valves opened, no leaks detected. IGP1 = 5.9e-7 Torr IGP2 = 4.0e-7 Torr Tapping up manually. Final desired temperature = 1800C    Thursday, December 07, 2017, 11:51 TGHT tripped off. Turns out the vacuum limits have not been fully updated when they should have been and the old ones still apply. IGP1 reached 8e-5 Torr which tripped off the system. TGHT = 80A, 1.05V when the system tripped.

 Friday, December 08, 2017, 15:29

Interlocks have been updated.

TGHT should now run up to 500mTorr before tripping off.

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote:  Thursday, December 07, 2017, 09:57 Each endcap is wrapped in a separate piece of graphite foil and placed in a target boat. There are also 4 coated springs, 2 on each side of the stack of endcaps. The boat is wrapped with 3-layers of Ta heatshields. Chamber pumped down overnight. OMEGA slope = 0.98 HS water valves opened, no leaks detected. IGP1 = 5.9e-7 Torr IGP2 = 4.0e-7 Torr Tapping up manually. Final desired temperature = 1800C    Thursday, December 07, 2017, 11:51 TGHT tripped off. Turns out the vacuum limits have not been fully updated when they should have been and the old ones still apply. IGP1 reached 8e-5 Torr which tripped off the system. TGHT = 80A, 1.05V when the system tripped.    Friday, December 08, 2017, 15:29 Interlocks have been updated. TGHT should now run up to 500mTorr before tripping off.

Friday, December 08, 2017, 15:41

IGP1 = 2.8e-7 Torr

IGP2 = 1.9e-7 Torr

Tapped up manually to 50A

Initiated auto-ramp at a rate of 0.2A/min up to 300A.

Vacuum limit stop at 3.0e-5 Torr, backing off at 4.0e-5 Torr.

 Monday, December 11, 2017, 09:37

IGP1 = 2.4e-7

TGHT = 300A, 4.80V

OMEGA = 1175C

Tapping up manually...

 Monday, December 11, 2017, 14:19

Tapped up manually to 1800C

IGP1 = 2.1e-6 Torr

IGP2 = 2.1e-6 Torr

TGHT = 545A, 9.90V

OMEGA = 1810C

Will remain at max setpoints overnight and cool down in the a.m.

 Tuesday, December 12, 2017, 09:01

TGHT = 545A, 9.96V

OMEGA = 1833C

Remained at max setpoints for ~18hrs

IGP1 = 4.2e-7 Torr

IGP2 = 3.9e-7 Torr

Initiating auto-cool at 2.0A/min

 Wednesday, December 13, 2017, 11:05

Vented in air and removed from evap2 this morning.

Tuesday, June 04, 2019, 08:36

Each endcap is separated with a disc of graphite foil and rolled into packs of 5 within a foil envelope in a target boat.

There are also 4 coated springs, 2 on each side of the stack of endcaps.

The boat is wrapped with 3-layers of Ta heatshields.

Chamber pumped down overnight.

OMEGA slope = 0.99

IGP1 = 3.5e-7 Torr

Will Tap TGHT up manually to 40 A then autoramp to 400A at 1A/min.

Final desired temperature on OMEGA (tap)= 1800C

Tuesday, June 04, 2019, 11:54

IGP1= 6.1e-06 Torr

TGHT= 40 A

Begin autoramp to 400A at 1A/min

Out-gassing cycles observed.  Reduced autoramp to 0.5A/min

Currently TGHT=65A, 0.60 V

Wednesday, June 05, 2019, 08:27

TGHT = 321A, 4.9V @1149C

IGP1= 8.49 e-6 Torr

Set autoramp to 1A/min to530 A

Wednesday, June 05, 2019, 13:26

TGHT 530A, 9.2V

IGP1= 3.01e-05 Torr

OMEGA Temperature = 1689 Celsius

Set autoramp to 570A at 1A/min

 Wednesday, June 05, 2019, 15:51

Tapped manually to 1800 Celsius

TGHT 579A, 10.1V

IGP1= 2.06e-05 Torr

TGHT tapped down to 575A when OMEGA T ~1810 C

Thursday, June 06, 2019, 08:13

TGHT = 575A, 9.95V

OMEGA = 1809 C

IGP1 = 4.1e-7 Torr

Initiating auto-cool at -2.0A/min

Thursday, June 06, 2019, 16:00

After 1 hour  of TGHT at 0A and 0V, unloaded the Target boat.

Friday, October 04, 2019, 11:37

Each endcap is separated with a disc of graphite foil and rolled into packs of 5 within a foil envelope in a target boat.

There are also 3 coated springs, one in between endcaps and two on either end

The boat is wrapped with 2-layers of Ta heatshields.

Chamber pumping down

OMEGA slope = 0.99

Will Tap TGHT up manually to 40 A then autoramp to 400A at 1A/min.

Final desired temperature on OMEGA (tap)= 1800C

Monday, October 07, 2019, 09:08

Sunday night heating started at 1A/ min on TGHT to 54 A

heating paused for 1 hour to allow IGP1 to equillibrate.  Then restarted at 1A/min to 400A as planned. 

This morning IGP1 = 1.3e-06 Torr

TGHT = 401A, 4.2V

OMEGA = 1550 C

Monday, October 07, 2019, 09:36

manually tapping to 1800 C

Monday, October 07, 2019, 14:09

Temperature @ ~1800 for 3.5 hours

TGHT= 495.4, 9.2 V

IGP1= 1.1e-06 Torr Pressure Steady there begin cooling

Cooling @ -2A/min