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.

Laura Lambert wrote:

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.

 Tuesday, January 28, 2014, 13:06

Discussed with Peter. Instead of re-sintering the whole boat by itself, end caps will be inserted for sintering and will be placed further down the boat where the sintering process appears complete.

 Tuesday, January 28, 2014, 15:43

The target containers end-caps were coated with TaC spray and let dry.

Each cap is wrapped with a small piece of graphite foil and inserted in the target boat. [see attached photo]

The chamber is currently being pumped down overnight.

 Wednesday, January 29, 2014, 11:32

Chamber was pumped down to 1.6e-7 Torr overnight.

HS cooling water valve opened; no leaks detected.

TGHT was stepped up to 35A, voltage max set at 11.05V. TBHT currently at 0A.

Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 0.2A/min and max setpoint to 580A.

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

 Thursday, January 30, 2014, 09:06

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

IGP1 = 2.4e-7 Torr, TGHT = 283A; stepping ramping rate up to 2.0A/min.

 Thursday, January 30, 2014, 15:53

TGHT reached 580A at 11:45. Measured temp @1650C.

Initiating TGHT auto-cooling now at 2.0A/min.

 Friday, January 31, 2014, 09:04

Chamber cooled down overnight, vented and opened this morning.

Smooth run!

 Friday, January 31, 2014, 11:21

Opened up the end caps, turns out it wasn't such a smooth run...they're not fully sintered 

See attached photo comparison between fully sintered end cap [silver] and end cap from this run [green].

Will re-install and re-sinter next week.

 Wednesday, February 05, 2014, 11:34

End-caps re-installed into EVAP2

Target boat is wrapped with 3 x Ta heat-shield.

Chamber is currently being pumped down.

 Wednesday, February 05, 2014, 14:31

Chamber was pumped down to 5e-7 Torr this morning.

HS cooling water valve opened, no leaks detected.

TGHT was stepped up to 35A, voltage max set at 11.05V. TBHT currently at 0A.

Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 0.2A/min and max setpoint to 580A.

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

 Thursday, February 06, 2014, 09:06

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

IGP1 = 1.1e-7 Torr, TGHT = 259A; stepping ramping rate up to 2.0A/min.

 Friday, February 07, 2014, 10:10

TGHT reached 580A yesterday. Measured internal temp @ 1500C.

Initiated TGHT auto-cooling this morning at 2.0A/min

 Tuesday, February 11, 2014, 13:30

Vented and opened chamber this morning.

Endcaps are toast  [see pictures attached]

Some of the endcaps broke/fried, others deformed-none useable.

Possibly due to new target boat resulting in more current?

Too much heat with Ta heat shields?

Bad News Bears 

 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.

 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.

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 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.

 Wednesday, June 14, 2017, 15:49

Pellets previously made by Marla and weighed.

Pellets are placed inside a small graphite sample tube.

Graphite sample tube loaded with pellets is loaded into a previously TaC coated boat.

Boat is wrapped with 3x Ta heat shields.

Loaded into evap2.

Chamber currently pumping down.

 Thursday, June 15, 2017, 11:24

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

Tapped up manually to 50A, 0.44V

Vacuum currently rising starting to settle.

IGP1 = 1.51e-6 Torr.

One vacuum stabilizes will initiate auto ramp at a rate of 1.0 A/min up to a final set point of 150 A.

Final desired temperature of 1800C.

Laura Lambert wrote:

Wednesday, June 14, 2017, 15:49 Pellets previously made by Marla and weighed. Pellets are placed inside a small graphite sample tube. Graphite sample tube loaded with pellets is loaded into a previously TaC coated boat. Boat is wrapped with 3x Ta heat shields. Loaded into evap2. Chamber currently pumping down.  Thursday, June 15, 2017, 11:24 HS water valves were opened this morning, no leaks detected. Tapped up manually to 50A, 0.44V Vacuum currently rising starting to settle. IGP1 = 1.51e-6 Torr. One vacuum stabilizes will initiate auto ramp at a rate of 1.0 A/min up to a final set point of 150 A. Final desired temperature of 1800C.

 Friday, June 16, 2017, 10:37

IGP1 = 7.91e-7 torr.

TGHT = 167 A, 2.3 V.

Tapped up manually to 350A yesterday, remained there overnight.

IGP1 = 4.55e-7 torr

TGHT=350 A, 5.6 V,

Changed slope to 0.98

Checked temperature readings with mikron to confirm slope

Mikron LS = 1260C, RS=1290C

OMEGA= 1295C

Initiating auto ramp at 1.0A/min to a final set point of 450A.

Final desired temperature of 1600C (no longer need to go to 1800C).

*note: graphite sample tube has graphite endcaps inserted

Marla Cervantes wrote:

Laura Lambert wrote:  Wednesday, June 14, 2017, 15:49 Pellets previously made by Marla and weighed. Pellets are placed inside a small graphite sample tube. Graphite sample tube loaded with pellets is loaded into a previously TaC coated boat. Boat is wrapped with 3x Ta heat shields. Loaded into evap2. Chamber currently pumping down.  Thursday, June 15, 2017, 11:24 HS water valves were opened this morning, no leaks detected. Tapped up manually to 50A, 0.44V Vacuum currently rising starting to settle. IGP1 = 1.51e-6 Torr. One vacuum stabilizes will initiate auto ramp at a rate of 1.0 A/min up to a final set point of 150 A. Final desired temperature of 1800C.    Friday, June 16, 2017, 10:37 IGP1 = 7.91e-7 torr. TGHT = 167 A, 2.3 V. Tapped up manually to 350A yesterday, remained there overnight. IGP1 = 4.55e-7 torr TGHT=350 A, 5.6 V, Changed slope to 0.98 Checked temperature readings with mikron to confirm slope Mikron LS = 1260C, RS=1290C OMEGA= 1295C Initiating auto ramp at 1.0A/min to a final set point of 450A. Final desired temperature of 1600C (no longer need to go to 1800C). *note: graphite sample tube has graphite endcaps inserted

 Friday, June 16, 2017, 15:10

Tapped up manually to 420A and auto ramp at 1.0A/min to 450A.

IGP1= 7.15e-7 torr

TGHT=450 A, 7.85 V

OMEGA = 1605C

Process completed, initiating auto cool at 1.0A/min

Elog entry by Pauline

 Monday, June 19, 2017, 16:18

Vented in air and removed from evap2 this a.m.

Weirdly TGHT had tripped off at 10pm on friday June 16th

TGHT = 58A when it tripped off.

Nothing else tripped.

Power supply was still on.

Water was still running

But, in the epics water control box it showed green boxes for TGHT, HS and CHILLER...but all said trip in yellow next to the boxes...odd...

Also noted, before removing from evap2, noticed both legs were bent and touching heat shield, will look further into this...