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]

 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]

 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.

 Wednesday, July 19, 2017, 13:44

Discs previously casted by Marla and Pauline and weighed. 

Discs are placed inside a small graphite container.

Graphite container with discs loaded with 30 discs was loaded into Ta-boat previously coated with TaC.

Ta-boat is wrapped with 3 Ta heat shields.

Loaded in evaporator 2.

Chamber currently pumping down.

Thursday, July 20, 2017, 16:07

 HS water valves were opened in the morning, no leaks were detected.

Perform water test to confirm paddle wheels are working well.

Current was tapped manually to 40 A.

Read out on meter confirmed paddle wheels are registering 

Tap back down to 20 A, tripped off system on purpose by closing HS water valves.

TGHT tripped off as expected.

Water flow test was good, initiating ramp up of samples.

Taped manually to 40 A.

After the stabilization of the vacuum auto ramping was set up to 0.2 A/min.

Up to a final set up point of 250 A.

Final desired temperature ~1800 C.

 Friday, July 21, 2017, 10:20

Final set up from July 20 was reached.

Current reading: 244.6 A.

Voltage reading: 3.82 V.

Temperature reached: 1105 C.

Final set up was change to 1500 A.

The temperature reached at 6 pm was 1936 C so the current  was decreased  to 488 A.

The final temperature after 30 min was 1800 C.

The set up stayed the same for the weekend.

 Monday, July 24, 2017, 13:06

Temperature reading in the morning was 1856 C.

TGHT: 487.87 A, 9.07 V

TGHT power supply: 

IGP1: 3.75e-7 Torr

IGP2: 3.51e-7 Torr

Started to ramp down at 1 A/min rate.

Initiating auto cooling at 1.0A/min for TGHT.

 Tuesday, July 25, 2017, 09:27

LaC2/C discs were taken off of evap2.

LaC2/C discs were brought in to glove box.

 Monday, July 31, 2017,  

Pellets previously pressed by Marla and Pauline. 

Pellets are placed inside a small graphite container.

Graphite container loaded with 5 pellets was loaded into Ta-boat previously coated with TaC.

Ta-boat is wrapped with 3 Ta heat shields.

Loaded in evaporator 2.

 Tuesday, August 01, 2017,

Chamber pumping down.

 Wednesday, August 02, 2017, 16:03

HS water valves were opened, no leaks were detected.

Current was tapped manually to 40 A.

After the stabilization of the vacuum auto ramping was set up to 0.5 A/min.

Up to a final set up point of 300 A.

Final desired temperature ~1700 C.

Marla Cervantes wrote:

Monday, July 31, 2017,   Pellets previously pressed by Marla and Pauline.  Pellets are placed inside a small graphite container. Graphite container loaded with 5 pellets was loaded into Ta-boat previously coated with TaC. Ta-boat is wrapped with 3 Ta heat shields. Loaded in evaporator 2.  Tuesday, August 01, 2017, Chamber pumping down.  Wednesday, August 02, 2017, 16:03 HS water valves were opened, no leaks were detected. Current was tapped manually to 40 A. After the stabilization of the vacuum auto ramping was set up to 0.5 A/min. Up to a final set up point of 300 A. Final desired temperature ~1700 C.

 Friday, August 04, 2017, 10:20

evap2 tripped twice yesterday.

1st trip) there was a power bump which caused a trip at ~4:20pm, this can be seen in the striptool image attached.

-TGHT spiked to zero, but immediately went back to the ~420A it was sitting at at the time.

-This did not initiate a full trip of everything, but a visual spike in the system can be seen

-Oddly this was not picked up in archives - happened so fast and must have been in the small time frame it was not picking up information

-Did TGHT actually drop to zero followed by then applying an immediate 420A?

-Or did it simple not register a reading due to power bump?

2nd trip) IGP1 stopped communicating at ~5:45pm, this can be seen in both the archives, striptool and evap2 control screenshot images attached

-IGP1 was fine, vacuum was good

-Registering good vacuum in epics - can see in screen shot vacuum was still good but IGP1 turned yellow as if turned off

-This resulted in TP followed by BV tripping off due to no longer getting a vacuum reading making the TP think there was a bad vacuum.

-Possible miscommunication with PLC?

-This is the same scenario that happened on mon - see elog i.d. 381

Will follow up when more information acquired...

Laura Lambert wrote:

Marla Cervantes wrote:  Monday, July 31, 2017,   Pellets previously pressed by Marla and Pauline.  Pellets are placed inside a small graphite container. Graphite container loaded with 5 pellets was loaded into Ta-boat previously coated with TaC. Ta-boat is wrapped with 3 Ta heat shields. Loaded in evaporator 2.  Tuesday, August 01, 2017, Chamber pumping down.  Wednesday, August 02, 2017, 16:03 HS water valves were opened, no leaks were detected. Current was tapped manually to 40 A. After the stabilization of the vacuum auto ramping was set up to 0.5 A/min. Up to a final set up point of 300 A. Final desired temperature ~1700 C.    Friday, August 04, 2017, 10:20 evap2 tripped twice yesterday. 1st trip) there was a power bump which caused a trip at ~4:20pm, this can be seen in the striptool image attached. -TGHT spiked to zero, but immediately went back to the ~420A it was sitting at at the time. -This did not initiate a full trip of everything, but a visual spike in the system can be seen -Oddly this was not picked up in archives - happened so fast and must have been in the small time frame it was not picking up information -Did TGHT actually drop to zero followed by then applying an immediate 420A? -Or did it simple not register a reading due to power bump? 2nd trip) IGP1 stopped communicating at ~5:45pm, this can be seen in both the archives, striptool and evap2 control screenshot images attached -IGP1 was fine, vacuum was good -Registering good vacuum in epics - can see in screen shot vacuum was still good but IGP1 turned yellow as if turned off -This resulted in TP followed by BV tripping off due to no longer getting a vacuum reading making the TP think there was a bad vacuum. -Possible miscommunication with PLC? -This is the same scenario that happened on mon - see elog i.d. 381 Will follow up when more information acquired...

 Friday, August 04, 2017, 14:05

Vented in air and transferred to glove box today.

Container did not break.

Some wires in PLC were not creating a good contact - could be problem re: IGP1 tripping off.

Wires replaced by Gelo.

Put back under vacuum with nothing loaded over weekend to see how things run...

 Monday, March 16, 2020, 13:47

Target material characteristics: Graphite cast of 0.965g/cm3, 287 D-shaped discs, disc area 0.969cm2, total mass of 9.972g, length 10.657cm.

The target material is loaded in a graphite cartridge.

The graphite cartridge is placed in a tantalum boat previously coated with TaC,

the Ta boat was wrapped with two used Ta heat shields.

The system is currently pumping down.

 Tuesday, March 17, 2020, 08:11

IGP1 = 3.18e-7 Torr

Current will be increased manually to 10 A, and then it will be autoramp to 500 A

During the input of the 10 A there was no anomaly with the pressure and the autoramp was set to:

1 A each 10 s with a good vacuum of 3e-2 Torr and a bad vacuum 5e-2 Torr 

 Tuesday, March 17, 2020, 09:03

After 30 min:

TGHT: 98.1 A, 1.48 V (the voltage is increasing)

IGP1 = 3e-4 Torr

The autoramp is set to 2 A each 10 s to 500 A

Tuesday, March 17, 2020, 09:52

At 500 A the temperature was ~1243 C

So, the autoramp was re started  2 A each 10 s to 520 A

TGHT= 510 A, 9.18 V

IGP1= 8.2e-5 Torr

Pressure decreasing.

Temperature register in iR2C: 1272 C

The temperature stayed at 1270 C, 

The autoramp is re started: 2 A each 10 s to 600 A

Tuesday, March 17, 2020, 10:24

TGHT: 10.693 V, 588.5 A

IGP1 max 7.4e-5 Torr

Temperature after 3 min at 588.5 A: 1368 C

Tuesday, March 17, 2020, 10:34 

The autoramp is re started: 2 A each 10 s to 650 A

Tuesday, March 17, 2020, 10:46

TGHT=11.99 V, 637.6 A

IGP1=5.5e-5 Torr (8e-5 Torr max)

Temperature 1459 C

The current and voltage drop 10 A and 0.3 V respectively when the autoramp is stopped

Tuesday, March 17, 2020, 10:53

The autoramp is re started: 2 A each 10 s to 700A 

Tuesday, March 17, 2020, 11:04

TGHT: 13 V, 686.59 A

IGP1: 6.2e-5 Torr (Max 8.7e-5Torr) 

Temperature: 1507 C

Tuesday, March 17, 2020, 11:05

 The autoramp is re started: 2 A each 10 s to 800A 

Tuesday, March 17, 2020, 11:16

TGHT=14.29 V, 759 A

IGP1: 8.6e-5 Torr (Max 1e-4 Torr)

Temperature 1527 C

There is a current discrepancy in EPICs (see current discrepancy picture),

the autoramp stopped at 761 A because EPICS? reads 800 A

Increasing current manually. 

Increasing the current manually did not work, because set current is at fake maximum 

 Tuesday, March 17, 2020, 13:43

The temperature stabilized to 1567 C. The current however was not stable ( look at the CarbonTarget - Max current)

an autoramp is set to -2 A  each 10 s to 0A

The set current is going down but not the epics reading current neither the temperature. I assume the current will star going down when the set and the reading current from epics are the same.

Tuesday, March 17, 2020, 13:50

Autoramp was stopped, and current was reduced manually, at around 652 A (set current) the reading current started going down (639.5 A) 

Autoramp is set to -2 A each 10s to 0 A

The tantalum boat deformed and the graphite cartridge rim broke 

Laura Lambert wrote:

Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.

 Tuesday, January 21, 2014, 11:10

Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected.

TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A.

Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A.

Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.

Laura Lambert wrote:

Laura Lambert wrote:  Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.    Tuesday, January 21, 2014, 11:10 Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected. TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A. Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A. Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.

 Tuesday, January 21, 2014, 11:51

Vacuum was grumpy and was well on it's way to tripping off [reached 5e-5 Torr], auto ramping was stopped at ~95A and quickly stepped down to 90A to avoid tripping it off.

Allowed vacuum to settle back down to 2.3e-6 Torr. Auto ramping changed to 0.2A/min and re-started.

 close-call!

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote:  Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.    Tuesday, January 21, 2014, 11:10 Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected. TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A. Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A. Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.    Tuesday, January 21, 2014, 11:51 Vacuum was grumpy and was well on it's way to tripping off [reached 5e-5 Torr], auto ramping was stopped at ~95A and quickly stepped down to 90A to avoid tripping it off. Allowed vacuum to settle back down to 2.3e-6 Torr. Auto ramping changed to 0.2A/min and re-started.  close-call!

 Wednesday, January 22, 2014, 09:46

TGHT has been slowly ramping up overnight at a rate of 0.2A/min.

IGP1 = 2.9e-7 Torr, TGHT = 342A; stepping ramping rate up to 2.0A/min.

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.    Tuesday, January 21, 2014, 11:10 Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected. TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A. Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A. Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.    Tuesday, January 21, 2014, 11:51 Vacuum was grumpy and was well on it's way to tripping off [reached 5e-5 Torr], auto ramping was stopped at ~95A and quickly stepped down to 90A to avoid tripping it off. Allowed vacuum to settle back down to 2.3e-6 Torr. Auto ramping changed to 0.2A/min and re-started.  close-call!    Wednesday, January 22, 2014, 09:46 TGHT has been slowly ramping up overnight at a rate of 0.2A/min. IGP1 = 2.9e-7 Torr, TGHT = 342A; stepping ramping rate up to 2.0A/min.

 Wednesday, January 22, 2014, 13:43

TGHT is sitting at 693A, IGP1 = 1.3e-6 Torr.

Stepping up TGHT voltage up to 14V from 13.05V to reach the max current of 700A.

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.    Tuesday, January 21, 2014, 11:10 Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected. TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A. Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A. Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.    Tuesday, January 21, 2014, 11:51 Vacuum was grumpy and was well on it's way to tripping off [reached 5e-5 Torr], auto ramping was stopped at ~95A and quickly stepped down to 90A to avoid tripping it off. Allowed vacuum to settle back down to 2.3e-6 Torr. Auto ramping changed to 0.2A/min and re-started.  close-call!    Wednesday, January 22, 2014, 09:46 TGHT has been slowly ramping up overnight at a rate of 0.2A/min. IGP1 = 2.9e-7 Torr, TGHT = 342A; stepping ramping rate up to 2.0A/min.    Wednesday, January 22, 2014, 13:43 TGHT is sitting at 693A, IGP1 = 1.3e-6 Torr. Stepping up TGHT voltage up to 14V from 13.05V to reach the max current of 700A.

 Wednesday, January 22, 2014, 15:09

TGHT reached to 700A/12.83V.  Local temperature on the boat surface was measured at ~1500C.

Note: This is the "old" design boat.  The new design boat was able to heat up to 900A/16.88 - the temperature was measured at about 1500C.  (see elog: https://elog.triumf.ca/TIS/Evaporator_2/15)

Target will be heated for a few hours and will be cooled down later tonight.

The chamber will be vented tomorrow and the boat will be inspected.

John Wong wrote:

Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.    Tuesday, January 21, 2014, 11:10 Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected. TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A. Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A. Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.    Tuesday, January 21, 2014, 11:51 Vacuum was grumpy and was well on it's way to tripping off [reached 5e-5 Torr], auto ramping was stopped at ~95A and quickly stepped down to 90A to avoid tripping it off. Allowed vacuum to settle back down to 2.3e-6 Torr. Auto ramping changed to 0.2A/min and re-started.  close-call!    Wednesday, January 22, 2014, 09:46 TGHT has been slowly ramping up overnight at a rate of 0.2A/min. IGP1 = 2.9e-7 Torr, TGHT = 342A; stepping ramping rate up to 2.0A/min.    Wednesday, January 22, 2014, 13:43 TGHT is sitting at 693A, IGP1 = 1.3e-6 Torr. Stepping up TGHT voltage up to 14V from 13.05V to reach the max current of 700A.    Wednesday, January 22, 2014, 15:09 TGHT reached to 700A/12.83V.  Local temperature on the boat surface was measured at ~1500C. Target will be heated for a few hours and will be cooled down later tonight. The chamber will be vented tomorrow and the boat will be inspected.

 Wednesday, January 22, 2014, 18:09

After the boat was heated for ~4hrs, TGHT tripped off on IEVAP2:TBHT2 (see attachment #1, #2). 

Tried clearing the water interlock via EPICS - failed to clear.  Checked the local water valves - ALL VALVES are OPEN 

Tried closing and re-opening the IEVAP2:TBHT2 valves, interlock cleared after a few minutes. 

Maybe a fault in the water signal.  If it happens again, the water signal should be replaced.

Turned back on the power supply - TGHT current/voltage are holding.  Target boat may be OK!

Chamber is a bit warm now.  Will allow time to cool down.

Will vent the chamber tomorrow and the boat will be inspected. 

John Wong wrote:

John Wong wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.    Tuesday, January 21, 2014, 11:10 Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected. TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A. Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A. Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.    Tuesday, January 21, 2014, 11:51 Vacuum was grumpy and was well on it's way to tripping off [reached 5e-5 Torr], auto ramping was stopped at ~95A and quickly stepped down to 90A to avoid tripping it off. Allowed vacuum to settle back down to 2.3e-6 Torr. Auto ramping changed to 0.2A/min and re-started.  close-call!    Wednesday, January 22, 2014, 09:46 TGHT has been slowly ramping up overnight at a rate of 0.2A/min. IGP1 = 2.9e-7 Torr, TGHT = 342A; stepping ramping rate up to 2.0A/min.    Wednesday, January 22, 2014, 13:43 TGHT is sitting at 693A, IGP1 = 1.3e-6 Torr. Stepping up TGHT voltage up to 14V from 13.05V to reach the max current of 700A.    Wednesday, January 22, 2014, 15:09 TGHT reached to 700A/12.83V.  Local temperature on the boat surface was measured at ~1500C. Target will be heated for a few hours and will be cooled down later tonight. The chamber will be vented tomorrow and the boat will be inspected.    Wednesday, January 22, 2014, 18:09 After the boat was heated for ~4hrs, TGHT tripped off on IEVAP2:TBHT2 (see attachment #1, #2).  Tried clearing the water interlock via EPICS - failed to clear.  Checked the local water valves - ALL VALVES are OPEN  Tried closing and re-opening the IEVAP2:TBHT2 valves, interlock cleared after a few minutes.  Maybe a fault in the water signal.  If it happens again, the water signal should be replaced. Turned back on the power supply - TGHT current/voltage are holding.  Target boat may be OK! Chamber is a bit warm now.  Will allow time to cool down. Will vent the chamber tomorrow and the boat will be inspected.

 Thursday, January 23, 2014, 16:18

Chamber vented overnight and was opened up this morning.

Target boat not fully sintered [see attached photos].

Chamber currently being pumped down again in order to continue with sintering TaC coating.

HS cooling water valves were opened, no leaks detected.

Will ramp up to 700A again over the weekend.

Laura Lambert wrote:

John Wong wrote: John Wong wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.    Tuesday, January 21, 2014, 11:10 Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected. TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A. Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A. Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.    Tuesday, January 21, 2014, 11:51 Vacuum was grumpy and was well on it's way to tripping off [reached 5e-5 Torr], auto ramping was stopped at ~95A and quickly stepped down to 90A to avoid tripping it off. Allowed vacuum to settle back down to 2.3e-6 Torr. Auto ramping changed to 0.2A/min and re-started.  close-call!    Wednesday, January 22, 2014, 09:46 TGHT has been slowly ramping up overnight at a rate of 0.2A/min. IGP1 = 2.9e-7 Torr, TGHT = 342A; stepping ramping rate up to 2.0A/min.    Wednesday, January 22, 2014, 13:43 TGHT is sitting at 693A, IGP1 = 1.3e-6 Torr. Stepping up TGHT voltage up to 14V from 13.05V to reach the max current of 700A.    Wednesday, January 22, 2014, 15:09 TGHT reached to 700A/12.83V.  Local temperature on the boat surface was measured at ~1500C. Target will be heated for a few hours and will be cooled down later tonight. The chamber will be vented tomorrow and the boat will be inspected.    Wednesday, January 22, 2014, 18:09 After the boat was heated for ~4hrs, TGHT tripped off on IEVAP2:TBHT2 (see attachment #1, #2).  Tried clearing the water interlock via EPICS - failed to clear.  Checked the local water valves - ALL VALVES are OPEN  Tried closing and re-opening the IEVAP2:TBHT2 valves, interlock cleared after a few minutes.  Maybe a fault in the water signal.  If it happens again, the water signal should be replaced. Turned back on the power supply - TGHT current/voltage are holding.  Target boat may be OK! Chamber is a bit warm now.  Will allow time to cool down. Will vent the chamber tomorrow and the boat will be inspected.     Thursday, January 23, 2014, 16:18 Chamber vented overnight and was opened up this morning. Target boat not fully sintered [see attached photos]. Chamber currently being pumped down again in order to continue with sintering TaC coating. HS cooling water valves were opened, no leaks detected. Will ramp up to 700A again over the weekend.

 Friday, January 24, 2014, 14:21

Chamber was pumped down to 1.7e-7 Torr.

TGHT was stepped up to 35A, voltage max set at 14V. TBHT currently sitting at 0A.

Waited 20min, vacuum consistently stable. Auto-ramp initiated at 2.0 A/min and max setpoint to 700A.

Laura Lambert wrote:

Laura Lambert wrote: John Wong wrote: John Wong wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.    Tuesday, January 21, 2014, 11:10 Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected. TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A. Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A. Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.    Tuesday, January 21, 2014, 11:51 Vacuum was grumpy and was well on it's way to tripping off [reached 5e-5 Torr], auto ramping was stopped at ~95A and quickly stepped down to 90A to avoid tripping it off. Allowed vacuum to settle back down to 2.3e-6 Torr. Auto ramping changed to 0.2A/min and re-started.  close-call!    Wednesday, January 22, 2014, 09:46 TGHT has been slowly ramping up overnight at a rate of 0.2A/min. IGP1 = 2.9e-7 Torr, TGHT = 342A; stepping ramping rate up to 2.0A/min.    Wednesday, January 22, 2014, 13:43 TGHT is sitting at 693A, IGP1 = 1.3e-6 Torr. Stepping up TGHT voltage up to 14V from 13.05V to reach the max current of 700A.    Wednesday, January 22, 2014, 15:09 TGHT reached to 700A/12.83V.  Local temperature on the boat surface was measured at ~1500C. Target will be heated for a few hours and will be cooled down later tonight. The chamber will be vented tomorrow and the boat will be inspected.    Wednesday, January 22, 2014, 18:09 After the boat was heated for ~4hrs, TGHT tripped off on IEVAP2:TBHT2 (see attachment #1, #2).  Tried clearing the water interlock via EPICS - failed to clear.  Checked the local water valves - ALL VALVES are OPEN  Tried closing and re-opening the IEVAP2:TBHT2 valves, interlock cleared after a few minutes.  Maybe a fault in the water signal.  If it happens again, the water signal should be replaced. Turned back on the power supply - TGHT current/voltage are holding.  Target boat may be OK! Chamber is a bit warm now.  Will allow time to cool down. Will vent the chamber tomorrow and the boat will be inspected.     Thursday, January 23, 2014, 16:18 Chamber vented overnight and was opened up this morning. Target boat not fully sintered [see attached photos]. Chamber currently being pumped down again in order to continue with sintering TaC coating. HS cooling water valves were opened, no leaks detected. Will ramp up to 700A again over the weekend.  Friday, January 24, 2014, 14:21 Chamber was pumped down to 1.7e-7 Torr. TGHT was stepped up to 35A, voltage max set at 14V. TBHT currently sitting at 0A. Waited 20min, vacuum consistently stable. Auto-ramp initiated at 2.0 A/min and max setpoint to 700A.

 Monday, January 27, 2014, 10:05

TGHT reached 700A over the weekend. Measured temp @ 2000C.

TGHT auto-cool inititated at 2.0A/min.

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote: John Wong wrote: John Wong wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Monday, January 20, 2014, 16:32 A new target boat was sprayed with TaC coating and let dry this morning. The target boat is NOT wrapped with Ta-heat shield. The boat was installed in Evap#2, chamber is currently being pumped down overnight.    Tuesday, January 21, 2014, 11:10 Chamber was pumped down to ~2e-7 Torr. HS cooling water valves were opened, no leaks detected. TGHT was stepped up to 35A, voltage max set at 13V. TBHT currently @ 0A. Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 2.0A/min and max setpoint to 700A. Good vacuum: 3.00e-5 Torr, Bad vacuum 4.00e-5 Torr.    Tuesday, January 21, 2014, 11:51 Vacuum was grumpy and was well on it's way to tripping off [reached 5e-5 Torr], auto ramping was stopped at ~95A and quickly stepped down to 90A to avoid tripping it off. Allowed vacuum to settle back down to 2.3e-6 Torr. Auto ramping changed to 0.2A/min and re-started.  close-call!    Wednesday, January 22, 2014, 09:46 TGHT has been slowly ramping up overnight at a rate of 0.2A/min. IGP1 = 2.9e-7 Torr, TGHT = 342A; stepping ramping rate up to 2.0A/min.    Wednesday, January 22, 2014, 13:43 TGHT is sitting at 693A, IGP1 = 1.3e-6 Torr. Stepping up TGHT voltage up to 14V from 13.05V to reach the max current of 700A.    Wednesday, January 22, 2014, 15:09 TGHT reached to 700A/12.83V.  Local temperature on the boat surface was measured at ~1500C. Target will be heated for a few hours and will be cooled down later tonight. The chamber will be vented tomorrow and the boat will be inspected.    Wednesday, January 22, 2014, 18:09 After the boat was heated for ~4hrs, TGHT tripped off on IEVAP2:TBHT2 (see attachment #1, #2).  Tried clearing the water interlock via EPICS - failed to clear.  Checked the local water valves - ALL VALVES are OPEN  Tried closing and re-opening the IEVAP2:TBHT2 valves, interlock cleared after a few minutes.  Maybe a fault in the water signal.  If it happens again, the water signal should be replaced. Turned back on the power supply - TGHT current/voltage are holding.  Target boat may be OK! Chamber is a bit warm now.  Will allow time to cool down. Will vent the chamber tomorrow and the boat will be inspected.     Thursday, January 23, 2014, 16:18 Chamber vented overnight and was opened up this morning. Target boat not fully sintered [see attached photos]. Chamber currently being pumped down again in order to continue with sintering TaC coating. HS cooling water valves were opened, no leaks detected. Will ramp up to 700A again over the weekend.  Friday, January 24, 2014, 14:21 Chamber was pumped down to 1.7e-7 Torr. TGHT was stepped up to 35A, voltage max set at 14V. TBHT currently sitting at 0A. Waited 20min, vacuum consistently stable. Auto-ramp initiated at 2.0 A/min and max setpoint to 700A.    Monday, January 27, 2014, 10:05 TGHT reached 700A over the weekend. Measured temp @ 2000C. TGHT auto-cool inititated at 2.0A/min.

 Tuesday, January 28, 2014, 11:53

Chamber cooled down overnight, vented and opened up this morning.

Target boat still has a strip of green, still not fully sintered! [see attached photos].

Chamber currently being pumped down again to attempt sintering - round 3.