Gradually open waterlines under vacuum after period of no use.

Wednesday, May 20, 2020, 07:17: Vacuum @ 1.13e-06T

Wednesday, May 20, 2020, 07:19: Hot lab cooling water return opened. Vacuum @ 1.13e-06T.

Wednesday, May 20, 2020, 07:22: Hot lab cooling water supply opened. Vacuum @ 1.11e-06T.

Wednesday, May 20, 2020, 07:29: Vacuum remains stable @ 1.11e-06T.  

 Darwin reported that he was unable to achieve vacuum of 150mTorr. The flex-line HS had been removed last week for modifications. SS gaskets received today. Replaced HS gaskets (Cu). 

Monday, July 13, 2020, 11:00: Roughing. 

Monday, July 13, 2020, 11:44: Vacuum to 200mTorr. Venting.

Monday, July 13, 2020, 11:55: Roughing. HS waterlines were opened. No visible leak detected.

Monday, July 13, 2020, 12:32: Venting. Vacuum to 175mTorr.

Monday, July 13, 2020, 12:34: Roughing.  

Monday, July 13, 2020, 15:21: Turn off the roughing pump. Vent in the am & plan to remove the HS to leak check the HS & EVAP 2. 

Tuesday, July 14, 2020, 07:42: Venting. 

Tuesday, July 14, 2020, 08:23: Flexible line HS removed. U-Line installed. Roughing. 

Tuesday, July 14, 2020, 08:54: Turbo pump on. 

Tuesday, July 14, 2020, 11:15: Vacuum @ 3.14e-06T. Turbo & Roughing pump off. 

Tuesday, July 14, 2020, 11:25:

HS leak checks:

0.0e-08 atm-cc/sec 

0.0e-07 atm-cc/sec @ 75 PSI He w/ sniffer.

0.0e-07 atm-cc/sec @ 120 PSI He w/ sniffer. (Note HS is very dirty inside)

Tuesday, July 14, 2020, 11:35: Venting EVAP 2. He bottle connected on "Air-In" on the HS water supply line. 

Tuesday, July 14, 2020, 13:50:

Pressurized the HS lines on EVAP 2 w/ 30 PSI He for 10 minutes. Remained @ 0.0e-07 atm-cc/sec.

Tuesday, July 14, 2020, 13:53: Roughing.

Tuesday, July 14, 2020, 17:33: Turbo pump on. 

Wednesday, July 15, 2020, 10:31: Turbo pump off. 

Wednesday, July 15, 2020, 12:02: HS Leak checked in the cold lab: 0.0e-07 atm-cc/sec @ 120 PSI He w/ sniffer.

Wednesday, July 15, 2020, 12:34: Venting. 

Wednesday, July 15, 2020, 13:37: Installed flex-line HS. Pressurized the HS lines on EVAP 2 w/ 30 PSI He for 10 minutes. Remained @ 0.0e-07 atm-cc/sec.

Wednesday, July 15, 2020, 13:42: Roughing. 

Wednesday, July 15, 2020, 14:16: Turbo pump on. 

Wednesday, July 15, 2020, 15:59: Vacuum @ 3.85e-06T 

Wednesday, July 15, 2020, 16:00: Waterline opened. No immediate response on Vacuum. 

Wednesday, July 15, 2020, 16:03: Vacuum @ 3.69e-06T and continuing to drop. 

 BP1 swapped with RP2 (TS beamline)

U-line installed.

Wednesday, August 05, 2020, 13:37: Roughing. 

Wednesday, August 05, 2020, 13:39: Open RV1 to EVAP 2 chamber.

Wednesday, August 05, 2020, 14:08: Turbo pump on. 

Wednesday, August 05, 2020, 14:17: Turbo pump on (green) / Shut - off. 

Wednesday, August 05, 2020, 14:18: BP1 off. Runs ok. 

Flex line HS installed. New SS gaskets. 

Wednesday, August 12, 2020, 08:56: Roughing (Check).

Wednesday, August 12, 2020, 09:17: Ready for turbo pump.

Wednesday, August 12, 2020, 09:20: BP1 Off. Venting. 

Saturday, September 05, 2020, 12:56

A Ta tube was wrapped with 3 tantalum foils,

a tantalum cap was inserted in both sides of the Ta tube, the caps weren't sealed.

The tube was set in the EVAP2 

IGP1 = 3.6e-7 Torr 

Saturday, September 05, 2020, 12:57

Autoram set to 10A/30 s to 200 A

 Saturday, September 05, 2020, 13:11

TGHT = 2.7 V, 198.9 A

IGP1 =3e-6 Torr

Autoramp set to to 300 A at 5A/30s 

 Saturday, September 05, 2020, 14:45

IGP1 = 5.1e-7 torr

TGHT = 4.5 V, 303 A

Oemga = 1259 C, 

AP = 1233.5 C

Autoramp set to 450A at 5 A/30s 

 Saturday, September 05, 2020, 15:05

TGHT = 7.3 V, 457.7 A

IGP1 = 2.8e-6 Torr

Omega = 1722 °C

AP = 1572.2 °C

Saturday, September 05, 2020, 15:16 

TGHT = 9.2 V, 552.5 A

IGP1 = 7.5e-6 Torr

Omega = 2016 °C 

AP= 1735.9 °C

Saturday, September 05, 2020, 21:33 

IGP1 = 1.1e-6 Torr

TGHT = 11.2 V, 651.9 A

Omega = 2300 °C

Sample loaded into a vertical target boat. Flex line HS removed, SS waterline HS installed -AS.

Thursday, September 24, 2020, 13:22: Roughing.

Thursday, September 24, 2020, 13:54: Turbo pump on. 

Friday, September 25, 2020, 10:30 

Target boat with a layer of niobium foil on the bottom is used to heat up Nb samples to 1400 C for 4 hrs.

OMEGA slope = 0.99

The niobium samples are wrapped in two layers of  Nb foil.

Boat is wrapped with 2 layers of Ta foil, careful to avoid touching samples.

Friday, September 25, 2020, 20:00 

autoramp to 345 A

 Friday, September 25, 2020, 20:39

TGHT = 345 A, 5.4 V

OMEGA = 1296 C

IPG1= 8.1 e-07 Torr

Ramp manually to 1400 C

 Friday, September 25, 2020, 20:51

reached 1400 C on OMEGA at TGHT = 476 A

Friday, September 25, 2020, 20:59

OMEGA increased to 1410, lowered TGHT to 468 A to get back to 1400 C on OMEGA 

Friday, September 25, 2020, 21:40

Lowered TGHT to 463 A,  5.79 V to bring OMEGA to 1400 C from 1404 C

 Saturday, September 26, 2020, 00:51

Sample has been at 1400 C for 4 hours.

IGP1= 7.2 e-07 Torr

Cooling at- 2A/min

Darwin Ortiz Rosales wrote:

Friday, September 25, 2020, 10:30  Target boat with a layer of niobium foil on the bottom is used to heat up Nb samples to 1400 C for 4 hrs. OMEGA slope = 0.99 The niobium samples are wrapped in two layers of  Nb foil. Boat is wrapped with 2 layers of Ta foil, careful to avoid touching samples.  Friday, September 25, 2020, 10:35 Manually ramped TGHT to 40 A and kept at that current for approximately 15 minutes.   Then started autoramp at  1A/min up to 100 A  Friday, September 25, 2020, 16:58 IPG1= 4.7e-07 Torr TGHT =100.0 A, 1.3 V Start autoramp to TGHT to 300 A  @ 2A/min  @ 300A temperature = 1179 C   Friday, September 25, 2020, 20:00  autoramp to 345 A  Friday, September 25, 2020, 20:39 TGHT = 345 A, 5.4 V OMEGA = 1296 C IPG1= 8.1 e-07 Torr Ramp manually to 1400 C  Friday, September 25, 2020, 20:51 reached 1400 C on OMEGA at TGHT = 476 A Friday, September 25, 2020, 20:59 OMEGA increased to 1410, lowered TGHT to 468 A to get back to 1400 C on OMEGA  Friday, September 25, 2020, 21:40 Lowered TGHT to 463 A,  5.79 V to bring OMEGA to 1400 C from 1404 C  Saturday, September 26, 2020, 00:51 Sample has been at 1400 C for 4 hours. IGP1= 7.2 e-07 Torr Cooling at- 2A/min

 Monday, September 28, 2020, 09:36

Vented chamber - for Darwin.

Monday, September 28, 2020, 11:49

6 discs of np-SiC were loaded to the target boat wrapped with 3 layers of heat shields.

Desired temperature at 1500 C, (As per e-log 414/416, TGHT = 450A/7.31V, 3.28kW) 

Omega slope set at 1.05 (for carbide)

Good vac = 3.0e-5 Torr,

Bad vac = 5.0e-5 Torr.

Pumping down in progress

 Monday, September 28, 2020, 21:44

Pressure at 1e-6 Torr.  Initiated autoramping at 0.2A/min to reach 300 A.  Monitor temp.

 Wednesday, September 30, 2020, 11:39

TGHT reached to 300 A/ 4.5V, temp at 1130 C.  No coating on windows.

Continue to ramp up 330A.  Monitor temp.

 Wednesday, September 30, 2020, 16:38

TGHT reached 330 A / 5.04 V, temp at 1190 C. 

Ramp up to 400 A. Current pressure at 9.8 e-7 Torr.

Thursday, October 01, 2020, 10:28

TGHT reached 400 A/ 6.3V, temp at 1320 C.  Continue to ramp up to 450 A.

 Thursday, October 01, 2020, 16:44

TGHT reached to 450 A/ 7.4 V.  TEmp at 1500 C. 

Pressure at 1.35 e-6 Torr and coming down.   Continue to hold TGHT at 1500 C for at least 24 hr.

 Sunday, October 04, 2020, 16:49

TGHT has been holding at 450 A/ 7.3 V for nearly 3 days; temp has gone up and stabilized at 1554 C; pressure at 2.13 e -7 Torr.

Initiated cooling down at -2A/min.

 Monday, October 05, 2020, 10:02

Chamber vented.

 Wednesday, October 07, 2020

TP1 was not spinning up past 4krpm. Stalling & tripping out. Examined with Vacuum group, appears to be starting to seize. Exchange turbo pump.

Serial# 500937

Wednesday, October 07, 2020, 12:25: TP1 Exchanged. 

Wednesday, October 07, 2020, 12:38: Roughing. 

Wednesday, October 07, 2020, 13:55: Soft start initiated. Steps up krpm every 5 min. 10 steps.

Wednesday, October 07, 2020, 13:22 @ 24 krpm.  

Wednesday, October 07, 2020, 13:42: TP1 at speed. 38 krpm. 

Wednesday, October 07, 2020, 13:45: TP1 off. Soft start function off. Remote start configuration initiated. TP1 on. OK. 

Friday, October 16, 2020, 11:30

 Target mounted in EVAP2. Pump down started

Friday, October 16, 2020, 12:05

Pressure goes up. Checked with Ferran and he says that the valve IEVAP2:RV1 automatically closes sometimes. WEIRD, to be chacked.

Friday, October 16, 2020, 15:20

IGP2 bottoms at 0.2T, and doesn't increase recover if I close RV1 while it shouldn't (as shown before). --> Vented to restart from scratch

Friday, October 16, 2020, 15:45

Pumped down again, vacuum went down to 0.16 and then started raising until ~0.18. This time the valve was open indeed! opening and closing the valve had no effect on the vacuum as if the  booster pump was not effective

Friday, October 16, 2020, 16:27

Tried a THIRD time, this time effectively, to turn the turbo ON. I managed to, but the turbo makes weird spinning sounds every ~30 sec. Moreover, its pumping down plot seems quite weird  - see spike UP while pumping. Could it be related to a dysfunction of the backing pump?

Monday, November 23, 2020, 17:01: Flex-line HS installed.

Tuesday, November 24, 2020, 08:03: Vacuum @ 9.55e-07T.

Tuesday, November 24, 2020, 08:08: Vacuum Ok

Tuesday, November 24, 2020, 08:09: Modify Controls dialogue on IEVAP2:IGP1:RDVAC

Max value from 0.1 to 0.0001 to better view curve on the strip tool and monitor for vacuum spikes.

Tuesday, November 24, 2020, 08:13: TGHT / TBHT PS on. 

Flex-Line HS had been fully scrubbed out earlier. All gaskets replaced.

Empty. Quick check for leaks.

Monday, March 01, 2021, 13:57: Roughing.

Monday, March 01, 2021, 14:13: TP1 on. 

Monday, March 01, 2021, 15:18: Vacuum @ 1.01e-05T. Open HS waterline. 

Monday, March 01, 2021, 15:24: Vacuum @ 9.30e-06T & dropping. Waterline ok. 

Monday, March 01, 2021, 15:25: Turbo pump off. Vent when ready. 

 Tuesday, March 16, 2021, 08:28 

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, one in between endcaps and three on the ends

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

Chamber pumping down

OMEGA slope = 0.99

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

Final desired temperature on OMEGA (tap)= 1800C

Tuesday, March 16, 2021, 11:22

 IGP1= 3.5e-06 Torr

TGHT = 40A, 0.4V

Will ramp up at 1A/min to 400 A

Wednesday, March 17, 2021, 08:06

IGP1=  2.98 e-07 Torr

TGHT = 400 A, 4.3V

OMEGA shows no temperature reading.  Will ramp up to 450A at 1A/min

Wednesday, March 17, 2021, 08:58

OMEGA still shows no reading

IGP1= 4.2e-07 Torr

ramping to 470A @ 1A/min 

Wednesday, March 17, 2021, 09:21

OMEGA no reading

IGP1 = 4.4 e-07 Torr

TGHT = 470 A, 5V

ramp up to 490 A at 1A/min

Wednesday, March 17, 2021, 11:05 

TGHT at 490 A, 5.2 V since 10 am.  Will start cooling at 2 pm.  

Wednesday, March 17, 2021, 13:47

TGHT = 493A, 5.3V

IGP1= 3.2e-07 Torr and stable

Start ramp down at -2A/min

Thursday, March 18, 2021, 11:20 

The boat was dismounted but the materials had not sintered properly.  The boat looked very twisted.  Everything was transferred to a new boat with uncoated Ta caps at either end.  

It was left overnight to establish vacuum.

Friday, March 19, 2021, 08:23

IGP1= 2.2 e-07 Torr

initiate heating at 1A/min on TGHT to 60 A

Friday, March 19, 2021, 10:04

IGP1= 3.6 e-07 Torr

TGHT = 60 A, .73 V

Ramp up to 450 A @ 2A/min

Friday, March 19, 2021, 14:26

OMEGA 1895 at 455A, 8.4 V

manually ramp down to 1800C

OMEGA 1800C at 416A, 7.6V

will leave like that for 3 hours more

Friday, March 19, 2021, 17:12

OMEGA 1795 C

 TGHT = 415A, 7.6V

IGP1= 6.8e-07 Torr

Start ramp down at -2A/min

Monday, March 22, 2021, 23:07 

Marla removed from Evap 2.  Sintering vwas very good.  The container with Ta caps is better for sintering these pieces.

 Modified HS installed with new brackets as per Marla.

Tuesday, March 23, 2021, 08:02: Vacuum @ 3.64e-07T. Waterlines opened.

Tuesday, March 23, 2021, 08:06: Vacuum @ 3.60e-07T. Stable.

Thursday, March 25, 2021, 07:55: Vacuum @ 5.12e-07T. Waterlines opened.

Thursday, March 25, 2021, 07:55: Vacuum @ 5.09e-07T. Stable.

 Friday, June 11, 2021, 08:05

Target boat with a layer of niobium foil on the bottom is used to heat up Nb samples to 1100 C for 4 hrs.

OMEGA slope = 0.99

The niobium samples are wrapped in a layer of  Nb foil.

Boat is wrapped with 2 layers of Nb foil.

Good vacuum 3.00e-02 Torr

Bad vacuum 5.00e-02 Torr

Autoramping TGHT at 2A/min to 50A then to 100A, then monitor until desired temperature

Initial IGP1= 9.4e-07 Torr

Friday, June 11, 2021, 09:59

TGHT = 200 A, 2.7V

IGP1=  9.8e-07 Torr

Tap to 1100C

Friday, June 11, 2021, 10:09 

Temperature reached at 10:05 am.

TGHT = 224A, 3.1V

IGP1= 1.0e-06 Torr

OMEGA= 1100C +/- 10C fluctuations

Friday, June 11, 2021, 14:10

TGHT = 224A, 3.1V

IGP1= 9.2e-.07 Torr

OMEGA = 1100C +/-  10C fluctuations

Started rampdown at -3A/min

 2021-07-21 4:44pm Vacumm at 1e-5Torr. Water cooling leak check ok.

 2021-07-21 4:54pm ramping up TGHT to 200A 1A/10s.

2021-07-21 5:31pm 200A TGHT, TC 94degC pyro 1100degC. TC very low, ramping down and venting.

2021-07-22 5:00pm Parasitic prototype target installed, Vacuum 3e-5T, leak check ok. Power on HE of parasitic target.

2021-07-22 5:14pm vacuum 2e-5T. Ramping up container to 100A , 1A/10s.

2021-07-22 5:33pm vacuum 1e-5T. All good at 100A. Ramping up container to 200A , 1A/10s.

2021-07-22 5:54pm vacuum 8.2e-6T. All good at 200A pyro at 1100degC. Ramping up container to 300A , 1A/10s.

2021-07-22 6:15pm vacuum 7.6e-6T. All good at 300A pyro at 1420degC. Ramping up container to 400A , 1A/10s.

2021-07-22 6:36pm vacuum 8e-6T. All good at 400A pyro at 1700degC. Ramping up container to 500A , 1A/10s.

2021-07-22 6:57pm vacuum 1e-5T. All good at 500A pyro at 1960degC. Ramping up container to 553A , 1A/10s.

2021-07-22 7:13pm vacuum 1e-5T. All good at 553A pyro at 2100degC.

2021-07-22 7:36pm Ramping down 1A/10s.

2021-07-23 10:00am Venting.

Swapped out the Cu gaskets for SS gaskets in the HS top lines. (x2)

Wednesday, October 13, 2021, 08:35: Roughing.

Wednesday, October 13, 2021, 08:50: Turbo pump on. TP Current 6.06-6.10A.

Wednesday, October 13, 2021, 08:59: TP maxed out at 3-4 KRPM, yet went "Green/On".

Wednesday, October 13, 2021, 09:00: Change FULL to Low setting. Restart. TP Current 6.15A.

Wednesday, October 13, 2021, 09:08: Timed out. Restarted from 5 KRPM. 

Wednesday, October 13, 2021, 09:14: Stalling @ 5 KRPM. Stop TP. Contact vacuum group.

Monday, October 18, 2021, 09:03: Roughing. Reboot TP controller. 

Monday, October 18, 2021, 09:25: Walkthrough soft start w/ vacuum group. TP timed out. Soft start failed. 

Monday, October 18, 2021, 09:31: EVAP 2 vented. TP to be disconnected & removed.

Monday, October 18, 2021, 09:55: TP removed. Quick check, barely spins when spin by hand gently. Replacement or refurbishment needed. 

500 lpm turbo pumps installed. TV551 Varian. SN: 202311 (Slightly active from BL1A - will not cross contaminate. Field only - Tagged) 

Wednesday, October 20, 2021, 11:35: Roughing. 

Wednesday, October 20, 2021, 11:52: TP on. 

Wednesday, October 20, 2021, 11:59: TP at speed. 

Wednesday, October 20, 2021, 12:02: Vacuum @ 6.13e-05T. Open HS waterline.

Wednesday, October 20, 2021, 12:03: Vacuum @ 5.63e-05T & dropping.

Wednesday, October 20, 2021, 12:04: Vacuum @ 5.32e-05T. TGHT PS on. 

Thursday, October 21, 2021, 10:02

10 TaC coated Ta caps, wrapped in graphite foil.

2 TaC coated Ta springs .

All mounted inside a target boat with enclosed ends.

Good vacuum = 3.0 e-3 Torr

Bad vacuum = 5.0 e-2 Torr

Will heat up to 1800-1900 C and keep at Temp for four hours

OMEGA slope = 0.990

*Note that the turbo pump has been replaced and this is the first EVAP2 operation after replacement*

Thursday, October 21, 2021, 10:03

IGP1= 1.6 e-06 Torr

starting ramp up at  2 amp/min to 30 A on TGHT

Thursday, October 21, 2021, 10:46

Ramping to 40 A at 2A/min and will keep there for 20 minutes. 

Thursday, October 21, 2021, 11:19

 IGP1= 1.2e-05 Torr and dropping

Start ramp up to 400 A at 0.5A/min

Thursday, October 21, 2021, 18:58

Started ramping at 3A/min to 468A on TGHT

Thursday, October 21, 2021, 20:15

Current at 468.  Will keep there until pressure low enough.

Friday, October 22, 2021, 05:50

IGP1= 8.9 e-06 Torr

Start ramp down at -2A/min

 Monday, October 25, 2021, 11:47

Upon examination the caps and springs did not appeared coated.  The camera was not online so the current used was based on previous elogs.  It may have evaporated TaC due to over temperature.

The materials will be cleaned, recoated and resintered.