Wednesday, November 29, 2017, 16:17

LP-FEBIAD loaded into evap2 today and currently pumping down.

Temperature measurements of the ionizer will be done by Fernando for ARIEL development.

Ta foil covering side holes on heat shield so no temp measurements can be done using OMEGA on side ports of evaporator as per request of Fernando

No Ta heat shields on container.

Final desired temperature of ionizer = 2000C

 Thursday, November 30, 2017, 09:51

HS water valves opened, no leaks detected.

IGP1 = 2.1e-7 Torr

IGP2 = 1.7e-7 Torr

Tapped up to TGHT = 350A, 5.83V; TBHT = 230A, 3.31V

IGP1 = 6.3e-7 Torr

IGP2 = 3.7e-7 Torr

Will check temp measurements in lab after lunch before proceeding...

 Friday, December 01, 2017, 11:04

Temperature measurements done.

Initiated auto-cool this morning.

TGHT cooling at 2.0A/min and TBHT at 1.0A/min.

Monday, December 04, 2017, 11:04

Removed from evap2 this morning.

 Wednesday, December 13, 2017, 10:36

LP-FEBIAD loaded into evap2 this morning and pumped down.

Temperature measurements of the ionizer will be done by Fernando for ARIEL development.

Ta foil covering side holes on heat shield so no temp measurements can be done using OMEGA on side ports of evaporator as per request of Fernando

No Ta heat shields on container.

HS water valves opened, no leaks detected.

IGP1 = 2.3e-6 Torr

IGP2 = 1.7e-6 Torr

Tapped up to TGHT = 50A, 0.30V; TBHT = 50A, 0.59V

IGP1 = 1.8e-6 Torr

IGP2 = 1.4e-6 Torr

Initiating auto ramp for TGHT at 2.0A/min up to 350A and TBHT at 1.0A/min up to 210A

 Wednesday, December 13, 2017, 14:53

IGP1 = 7.6e-7 Torr

IGP2 = 6.4e-7 Torr

TGHT = 350A, 5.85V

TBHT = 210A, 3.02V

TGHT and TBHT will be adjusted accordingly for temperature measurements...

Thursday, December 14, 2017, 09:16 

IGP1 = 2.1e-7 Torr

IGP2 = 1.7e-7 Torr

TGHT = 385A, 6.80V

TBHT = 210A, 3.01V

Tapped up to TGHT = 400A, 7.11V

Stopped for temperature measurements.

Tapped up to TGHT = 450A, 8.20V

 Friday, December 15, 2017, 09:50

IGP1 = 1.2e-7 Torr

IGP2 = 9.6e-8 Torr

TGHT = 350A, 5.82V

TBHT = 210A, 2.94V

Initiating auto-ramp to TGHT = 650A

Monday, December 18, 2017, 10:43

Temperature measurements done.

Initiated auto-cool.

TGHT cooling at 2.0A/min and TBHT at 1.0A/min.

 Tuesday, December 19, 2017, 11:40

Vented in air and removed from evap2 today.

Monday, February 19, 2018, 13:39

LP-FEBIAD loaded into evap2 this morning and pumped down.

Temperature measurements of the ionizer will be done by Fernando for ARIEL development.

Ta foil covering side holes on heat shield so no temp measurements can be done using OMEGA on side ports of evaporator as per request of Fernando

No Ta heat shields on container.

HS water valves opened, no leaks detected.

IGP1 = 2.75e-6 Torr

IGP2 = 1.42e-6 Torr

Tapped up to TGHT = 50A, 0.53V; TBHT = 50A, 0.56V

IGP1 = 2.64e-6 Torr

IGP2 = 1.35e-6 Torr

Initiating auto ramp for TGHT at 2.0A/min up to 350A and TBHT at 1.0A/min up to 210A

 Tuesday, February 20, 2018, 09:15

IGP1 = 6.9e-7 Torr

IGP2 = 3.8e-7 Torr

TGHT = 350A, 5.98V

TBHT = 210A, 3.02V

TGHT and TBHT will be adjusted accordingly for temperature measurements...

 Tuesday, February 27, 2018, 14:55

Temperature measurements done.

Initiated auto-cool.

TGHT cooling at 2.0A/min and TBHT at 1.0A/min.

 Wednesday, February 28, 2018, 10:39

Tuesday, December 19, 2017, 11:40

Vented in air and removed from evap2 today.

 Friday, March 09, 2018, 11:03

LP-FEBIAD loaded into evap2 and pumped down.

Temperature measurements of the ionizer will be done by Fernando for ARIEL development.

Ta foil covering side holes on heat shield so no temp measurements can be done using OMEGA on side ports of evaporator as per request of Fernando

No Ta heat shields on container.

HS water valves opened, no leaks detected.

Tapped up to TGHT = 50 A, 0.54 V; TBHT = 50 A, 0.45 V

IGP1 = 1.8e-6 Torr

IGP2 = 1.4e-6 Torr

Initiating auto ramp for TGHT at 2.0A/min up to 310A and TBHT at 1.0A/min up to 210A

Monday, March 12, 2018, 10:16 

IGP1 = 8.8e-8 Torr

IGP2 = 6.6e-8 Torr

TGHT = 310A, 5.06V

TBHT = 210A, 2.98 V

TGHT and TBHT will be adjusted accordingly for temperature measurements

Tuesday, March 13, 2018, 16:00 

Temperature measurements done.

Initiated auto-cool.

TGHT cooling at 2.0A/min and TBHT at 1.0A/min.

Wednesday, March 14, 2018, 16:03

Removed from evap2.

 Wednesday, October 31, 2018, 19:35

Container is coated with TaC and wrapped with Ta heat-shield (3 layers)

Desired temp = 1900 C (expected TGHT ~445A/7.5V), TBHT will be set fixed at 230A (max).

Chamber is currently being pumped down

 Thursday, November 01, 2018, 10:31

Pressure at IGP1 9.44e-7 Torr. 

Tapped up TGHT and TBHT manually to 40 A

Thursday, November 01, 2018, 12:32

Waited ~1 hr for vacuum to stabilize.

IGP1 = 1.42e-6 Torr

Good vac at 3.00-5 Torr

Bad vac at 5.0e-5 Torr.

Initiating auto ramp for TGHT @ 1 A/min to a max setpoint of 350 A

Initiating auto ramp for TBHT @ 0.5 A/min to a max setpoint of 230 A

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

 Tapped manually to 445 A, Temperature 1896 C.

Friday, November 02, 2018, 07:35

TGHT 7.86 V 445.6 A

TBHT 3.22 V 233.3 A

IGP1 1e-6 Torr

Ramping down TGHT and TBHT to 0 A @ 2 A/min.  

Friday, November 02, 2018, 17:28

Monday, October 29, 2018, 12:39

Venting EVAP2, TaC coat sintering completed. 

 Friday, November 02, 2018, 17:33

A new LP-FEBIAD was coated and syntered (e-log 421 Evaporator_2) 

The container was loaded with an empty graphite insert.

Graphite insert mass = 24.1724 g

A current of 440 A TGHT and 230 A TBHT will be inputed to the container

EVAP2 currently pumping down

 Saturday, November 03, 2018, 08:04

IGP1 = 5.66e-7 Torr

Tapping manually to 40 A on TGHT and TBHT

Then auto/ramp wiill be set to 2 A/min on TGHT and 1 A/min on TBHT

Maximum temperature achieve 1802 C

 Tuesday, November 06, 2018, 14:49

Container has reduced and increased its temperature from ~1760 to 1802 C.

IGP1  3.44e-7 Torr

TGHT 441.7 A and 7.7 V

TBHT 233.2 A and 3.2 V

 Wednesday, November 07, 2018, 08:32

Temperature 1785 C

IGP1  2.90e-7 Torr

TGHT 441.38 A and 7.7 V

TBHT 233.2 A and 3.2 V

 Friday, November 09, 2018, 17:26

Temperature 1787 C

IGP1  2.12 -7 Torr

TGHT 442.03 A and 7.7 V

TBHT 233.06 A and 3.19 V

Tuesday, November 13, 2018, 14:13: Turbos, power supplies off. Prepare for venting. 

 Wednesday, April 17, 2019, 09:03

An uncoated target container was loaded with a graphite insert and wrapped with 3 tantalum layers,

Two Ta caps were used

EVAP2 was pumped down, IGP1 = 5.14e-7 Torr

 The TGHT and TBHT current was tapped to 40 A manually

Autoramp was set to TGHT 1A/min to 500 A

and TBHT 0.5A/min to 230 A.

The temperature reached 2000 C as planned 

the target container stayed at that temperature for 1 week.

Tuesday, April 23, 2019, 10:00

EVAP2 was vented and the target container was removed.

The container crystalized but did not break.

 Tuesday, May 14, 2019, 13:56: Removed old HS w/ flexible lines & swapped in the FEBIAD. (HS waterlines are still purged.) Roughing.

Tuesday, May 14, 2019, 14:06: Turbo pump on. 

Tuesday, May 14, 2019, 14:22: Waterlines opened. Vacuum ok @ 5.34e-05T & dropping. 

Wednesday, May 15, 2019, 06:21

IGP1 = 5.99e-7 Torr,

manually tapping to 40 A.

Autoramp set to 2A/min to TGHT=580 A and TBHT=290 A

Tuesday, May 21, 2019, 08:13

IGP1= 1.43e-7 Torr

TGHT = 580.875 A, 11.22 V

TBHT =  4.45 V, 309.219 A

Temperature 1004 C measured at Ta foil

Ramp-down was initiated with IGP1 = 1.423e-07 Torr

Ramp rate = 2A/min for TGHT and 1/min for TBHT

EVAP2 was vented with air

 Tuesday, May 21, 2019, 14:20 Test FEBIAD removed - AS.

Tuesday, December 03, 2019, 08:15: Waterlines opened. Vacuum ok @ 4.06e-07T

Tuesday, December 03, 2019, 08:23: Unable to start due to flow trip? PS off. 

Tuesday, December 03, 2019, 08:25: Turbo & Vac off. 

Tuesday, December 03, 2019, 08:51: Vented. Investigate. Install outer shields. Loose wire found on exterior paddle. Trip gone. Roughing. 

Tuesday, December 03, 2019, 09:03: Turbo pump on. 

Tuesday, December 03, 2019, 09:12: PS on. Vacuum @ 4.46e-05T and dropping. 

Wednesday, December 04, 2019, 10:21: Manually tapped up the TGHT / TBHT to 35 / 10 A.

Wednesday, December 04, 2019, 10:22: Auto-ramping TGHT / TBHT to 300 / 150 A @ 2 A per min. 

FM

Wednesday, December 04, 2019, 13:48:  Auto-ramping TGHT / TBHT to 350 / 175 A @ 2 A per min. 

Wednesday, December 04, 2019, 14:20: Auto-ramping TGHT / TBHT to 400/ 190 A @ 2 A per min.  

Thursday, December 05, 2019, 10:58: Checking the striptool, approximately 30 minutes ago there was an oscillatory behaviour on the TGHT power. It went down to 0 in a very short time.

Temperature measurements were recorded and indicate a 70C difference from before the event.

 Thursday, December 05, 2019, 15:08: Auto-ramping TGHT / TBHT to 450/ 230A @ 2 A per min.  

Thursday, December 05, 2019, 19:05: Checking the striptool, at around 6 pm the TGHT power supply trip and didn't come back.

Thursday, December 05, 2019, 19:06: Drop in temperature indicates the target stop glowing.

Thursday, December 05, 2019, 19:07> Turning off power supply on EPICS and setting the slider to 0A.

I will ramp up TGHT in the morning while in the lab. 

Friday, December 06, 2019, 14:55: Ramping down TBHT to 0A @ 2A/min 

Tuesday, December 10, 2019, 09:11: Manually tapped up the TGHT / TBHT to 35 / 10 A 

Tuesday, December 10, 2019, 09:12:  Auto-ramping TGHT / TBHT to 400/ 230A @ 2 A per min.  

Aborted

 FEBIAD installed. Anode PS installed. ANODE connected!.

Leak check

Thursday, September 10, 2020, 07:46: Vacuum @ 6.30e-07T

Thursday, September 10, 2020, 07:47: HS Waterline open. Stable vacuum.

Thursday, September 10, 2020, 07:51: Auto-ramp TGHT / TBHT to 400 / 200 A @ 2 A per min. 

FM

Thursday, September 10, 2020, 13:28: Pyrometer aligned.  Current reading 1106.7 @ slope=0.9

Thursday, September 10, 2020, 13:46: Auto-ramp TGHT / TBHT to 580/ 250A @ 2 A per min. 

Thursday, September 10, 2020, 13:47: Recording pyrometer data 

Thursday, September 10, 2020, 15:33: Auto-ramp finished. Temperature=1568.0 @slope=0.9

Thursday, September 10, 2020, 15:35: Voltage power supply limited to 150 mA.

Thursday, September 10, 2020, 15:36: Voltage power supply is set to output. Nothing strange on the other PS.

Thursday, September 10, 2020, 15:42: Slowly increased the voltage to 150 V but nothing read. two times during the voltage sweep the current on the Ps showed 1mA. Nothing strangeon the vacumm or the other power supply voltages

Thursday, September 10, 2020, 15:45: Auto-rampup TBHT to 290 @ 2A/min 

Thursday, September 10, 2020, 16:08: Voltage sweep  

Thursday, September 10, 2020, 17:24: Auto-rampup to 300 @ 2A/min

Friday, September 11, 2020, 11:05: Auto-ramping to 290 @ -2A/min 

Friday, September 11, 2020, 13:22: auto-ramping to 305 @ 2A/min 

Friday, September 11, 2020, 14:10: The power supply is not reading current anymore. At 305 A I couldn't get any reading. I lowered the current to 290 A and the PS displays 0 mA even at 500 V, whereas before it showed 13 mA.

Vacuum looks normal not any sort of spike.

I will open the system to inspect the interior.

Friday, September 11, 2020, 14:15: Auto-cooling to 0 A TGHT/TBHT @-2A/min 

Saturday, September 12, 2020, 10:52: Venting 

Saturday, September 12, 2020, 14:00: Confirmed anode de-attached. I will spot welded again. 

Saturday, September 12, 2020, 18:29: After many failures I aborted the spot welding. The anode ended up looking pretty bad. 

 Sunday, September 13, 2020, 19:06: Opened waterlines. Vacuum still decreasing.

Monday, September 14, 2020, 09:12: Vacuum @  8.15e-7 T. and decreasing. I will start the ramping now.

Monday, September 14, 2020, 09:28: Auto-ramping to 400/200 A @ 4/min (1 A/15 s) .

No reading on the 2-color pyrometer channel. 1-color channels indicate around 1000C

 Monday, September 14, 2020, 12:49: Recording temperature and vacuum. Auto-ramp TBHT to 210 @ 4A/min.

 Monday, September 14, 2020, 12:57: Emissivity slope sweep. Only "under" is being shown

Monday, September 14, 2020, 12:58:  Auto-ramp TBHT to 220 @ 4A/min. 

Monday, September 14, 2020, 13:05: Emissivity slope sweep. Only "under" is being shown

Monday, September 14, 2020, 13:06: Auto-ramp TBHT to 240 @ 4A/min.  

Monday, September 14, 2020, 13:17: Auto-ramp TBHT to 250 @ 4A/min.   

Monday, September 14, 2020, 13:22: Emissivity slope sweep. Only "under" is being shown 

Monday, September 14, 2020, 13:23: Auto-ramp TBHT to 260 @ 4A/min.    

Monday, September 14, 2020, 13:27 : Emissivity slope sweep. Only "under" is being shown 

Monday, September 14, 2020, 13:27 : Auto-ramp TBHT to 275 @ 4A/min.    

Monday, September 14, 2020, 13:36: Emissivity slope sweep. Only "under" is being shown for the 2-color channel. 1-color channel displays around 1200 C. Maybe there is a different  cutoff for the 2-color channel

Monday, September 14, 2020, 13:38: At 400V the PS reads back 1mA 

Monday, September 14, 2020, 13:39 : Auto-ramp TBHT to 290 @ 4A/min.   

Monday, September 14, 2020, 17:41: Roughing 

Tuesday, September 15, 2020, 07:03: Vacuum stable at 4.65e-7T.

Tuesday, September 15, 2020, 07:03:  Auto-ramp TGHT / TBHT to 400/ 200A @ 4 A per min. 

Tuesday, September 15, 2020, 10:00:  Auto-ramp TGHT  to 500 @ 4 A per min. 

Tuesday, September 15, 2020, 11:13:  Auto-ramp  TBHT to 250@ 4 A per min. 

Tuesday, September 15, 2020, 15:44: There is a short inside the system. I  thought it might be the vanadium wire but increasing the tbht current did not indicate a clear evaporation so I don't think this is the case.

I'll ramp down to 0 at 8A/min to open and inspect. My measurements don't make any sense without both the pyrometer and the anode leakage current reading.

Tuesday, September 15, 2020, 15:49: Auto-cooling TGHT/TBHT to 0A at 8A/min (2A /15 s).

 Tuesday, September 15, 2020, 16:00: Auto-cooling aborted, the system is no longer current limited. The contact causing the issue probably moved while cooling.

***many ramp ups.downs, Temperature measurements, voltage sweeps, inverse temperature estimations. Absolute temperature measurements for when the vanadium wire melted, the pyrometer was already reading 1920, a slightly adjust on the emissivity slope move it to 1911C

Tuesday, September 15, 2020, 18:47: Ramp down TGHT/TBHT to 500/250 A @ -1A/min

Tuesday, September 15, 2020, 18:48: Done for today. 

Wednesday, September 16, 2020, 10:02: Auto-ramp up TGHT/TBHT to 580/285 A @ 2A/min 

Wednesday, September 16, 2020, 12:59: Auto-ramp  up TGHT/TBHT to 600 A @ 2 A/min 

Wednesday, September 16, 2020, 13:45: Auto-ramp up TBHT to 290 A @ 1A/min 

Wednesday, September 16, 2020, 18:45: Auto-ramp down TGHT/TBHT to 400/200 A @ -2A/min 

Thursday, September 17, 2020, 08:46: Auto-ramp up TBHT to 285 A @ 2A/min 

Thursday, September 17, 2020, 12:03: Auto-cooling TGHT/TBHT to 0A @ -4A/min

Thursday, September 17, 2020, 13:49: Turbo off. Roughing pump off 

Tuesday, February 28, 2023, 07:19

Ta LP-FEBIAD was coated with TaC and wrapped with Ta heat-shields (4 layers)

Desired temperature = 1850 C , TBHT will be set fixed at 230A (max).

Evap 2 will be pumped down over previous night

OMEGA slope= 0.990

Good vacuum = 5.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1= 1.2 e-06 Torr

Start autoramp @1A/min to 80 A then autoramp heat @1A/min to 150 A.  Then autoramp TGHT to 400 A and TBHT to 230A.1

Tuesday, February 28, 2023, 15:39

Will ramp to 426A to 1850C as per regression line. 

Tuesday, February 28, 2023, 15:57

Will start cooling at 8 pm

OMEGA= 1858 C

IGP1= 2.12e-06 Torr

TGHT =426 A, 7.5 V

TBHT = 230 A, 3.2 V

Tuesday, February 28, 2023, 19:58

OMEGA = 1858 C

IGP1 = 1.04e-06 Torr

TGHT =426 A, 7.6 V

TBHT = 230 A, 3.2 V

rampdown TGHT at -2A/min and TBHT @ -1A/min

Saturday, March 04, 2023, 08:29

Ta LP-FEBIAD with 369 discs plus 5 removable discs wrapped with 3 Ta heat-shields (in layers)

Evap 2 will be pumped down over previous night

Desired temperature = 1500 C as in Elog #52 , TGHT will be ramped up to 300 A and then adjusted manually to 1500C if temperature readings are ok

otherwise will use plot from coating sintering to approximate 1500C.

TBHT will be set fixed at 230A (max).

Good vacuum = 5.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1= 3.4 e-07 Torr

Start autoramp @2A/min to 80 A then autoramp heat @1A/min to 230 A (both TGHT and TBHT)

  Then autoramp TGHT to 300 A

-

Saturday, March 04, 2023, 22:27

At 332 A, 5.6V on TGHT, 230 A, 3.3 V TBHT

OMEGA = 1370 C

Will autoramp to 375A on TGHT @0.25A/min then leave for 4 hours at 1500C

Cooling should start at 6 am march 5th

OMEGA reading 1498 @ 2 am

Sunday, March 05, 2023, 06:03

OMEGA reading 1442 C @550am

ramped up to 394 A on TGHT and OMEGA reads 1500 C

will leave for 40 minutes than test ramp up to observe outgassing

d until 715 am then begin rampdown.

Sunday, March 05, 2023, 07:22

ramped to 425 to test further outgassing temperature increase observed but only while increasing current.

OMEGA = 1590 C

TGHT= 425A, 7.6V

TBHT= 230A, 3.3V

IGP1=2.0e-06 Torr

ramping down @-2A/min on TGHT and -1A/min TBHT

Thursday, April 20, 2023, 06:59

The coated container was wrapped in 3 Ta foil heatshields.

Target temperature on OMEGA= 1830-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230A

Final TGHT current= ~400A (adjustable)

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Thursday, April 20, 2023, 07:02

Started TBHT and TBHT ramp at 1A/min to 230A

Thursday, April 20, 2023, 09:55

From 170 A started ramping at 2A/min to 230 A on both TGHT and TBHT

Thursday, April 20, 2023, 10:27

Starting ramp on TGHT to 300A, TBHT kept at 230A, 3.0 V

Thursday, April 20, 2023, 11:19

ramping at 4A/min (2A/30s) to 340 A on TGHT

Thursday, April 20, 2023, 11:40

After plot, ramping @ 2A/min to 460A on TGHT expected to reeach at 1245.  4 hours at 4:45 pm

Thursday, April 20, 2023, 13:44

Note that top temperature was 1835C @  480 A, 7.9V

Thursday, April 20, 2023, 17:00

Start rampdown at -2A/min TGHT and -1A/min TBHT

Monday, April 24, 2023, 13:35

The coating is not as good as expected.  Maybe too much time between coating and sintering.  Will not use for TiC target.

Sunday, April 23, 2023, 07:23

The coated container was wrapped in 3 Ta foil heatshields.

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230A

Final TGHT current= ~450A (adjustable)

Good vacuum = 5.0 e-04Torr

Bad vacuum = 5.0E-02 Torr

Interlock tripped (HS water flow, SP6, GE, CHIL <--supposed to be bypassed)

 Monday, April 24, 2023, 13:24

In the morning Carla found some loose wires behind EVAP 2. Wires connecting the flow-meter.  The interlock problem was fixed as it was noted there was normal HS water flow.

Started ramp up at 1A/min to 230 A.  The first outgassing bump observed and wil start autoramp @ 2A/min on both TGHT and TBHT (target is 400A on TGHT and 230A on TBHT).

Monday, April 24, 2023, 16:24

Reached 480A on TGHT at 4 pm.  Manually tapped to 500 A on TGHT , OMEGA=1853C.  Will keep until 8 pm.

Monday, April 24, 2023, 19:56

OMEGA= 1853 C

IGP1= 1.5e-06 Torr

TGHT = 500A, 8.5V

TBHT= 230A, 3.1V

rampdown TGHT @-2A/min and TBHT @ -1A/min

Wednesday, April 26, 2023, 09:32

LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses

50 packs of 5 and the rest are singles

TaC coated (sintered) springs placed at both ends

Initial total Weight = 521.83 g

Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT

OMEGA slope = 0.99

Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr

Vacuum limit up after 200A: 3.0e-05 Torr -- 5.0e-05 Torr

No Ta heat-shields used

Initial IGP1 = 4.1e-07 Torr

Wednesday, April 26, 2023, 09:49

Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min

Wednesday, April 26, 2023, 12:50

Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done.

Wednesday, April 26, 2023, 14:03

IGP1 = 6.0 e-05 Torr

TGHT = 200 A, 2.7V

TBHT = 200 A, 2.6 v

OMEGA = Below lower limit

Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT.

Wednesday, April 26, 2023, 14:13

IGPI= 4.2 e-05 Torr

starting ramping to 400 A on TGHT and 280A on TBHT 

Wednesday, April 26, 2023, 14:26

The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed

Wednesday, April 26, 2023, 14:42

pressure hovering around good vacuum so very slow progress.

Wednesday, April 26, 2023, 15:12

TGHT= 223 A, 3.1 V

TBHT = 226 A, 3.0 V

Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.

Darwin Ortiz Rosales wrote:

Wednesday, April 26, 2023, 09:32 LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses 50 packs of 5 and the rest are singles TaC coated (sintered) springs placed at both ends Initial total Weight = 521.83 g Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT OMEGA slope = 0.99 Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr Vacuum limit up after 200A: 3.0e-05 Torr -- 5.5e-05 Torr No Ta heat-shields used Initial IGP1 = 4.1e-07 Torr Wednesday, April 26, 2023, 09:49 Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min Wednesday, April 26, 2023, 12:50 Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done. Wednesday, April 26, 2023, 14:03 IGP1 = 6.0 e-05 Torr TGHT = 200 A, 2.7V TBHT = 200 A, 2.6 v OMEGA = Below lower limit Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT. Wednesday, April 26, 2023, 14:13 IGPI= 4.2 e-05 Torr starting ramping to 400 A on TGHT and 280A on TBHT  Wednesday, April 26, 2023, 14:26 The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed Wednesday, April 26, 2023, 14:42 pressure hovering around good vacuum so very slow progress. Wednesday, April 26, 2023, 15:12 TGHT= 223 A, 3.1 V TBHT = 226 A, 3.0 V Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.

 Vacuum spike at 300A.

Currently:

TGHT= 316A, 4.6V

TBHT=283A, 3.9V

Wednesday, April 26, 2023, 18:18 Ramping TBHT down from 280A to 270A

Carla Babcock wrote:

Darwin Ortiz Rosales wrote: Wednesday, April 26, 2023, 09:32 LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses 50 packs of 5 and the rest are singles TaC coated (sintered) springs placed at both ends Initial total Weight = 521.83 g Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT OMEGA slope = 0.99 Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr Vacuum limit up after 200A: 3.0e-05 Torr -- 5.5e-05 Torr No Ta heat-shields used Initial IGP1 = 4.1e-07 Torr Wednesday, April 26, 2023, 09:49 Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min Wednesday, April 26, 2023, 12:50 Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done. Wednesday, April 26, 2023, 14:03 IGP1 = 6.0 e-05 Torr TGHT = 200 A, 2.7V TBHT = 200 A, 2.6 v OMEGA = Below lower limit Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT. Wednesday, April 26, 2023, 14:13 IGPI= 4.2 e-05 Torr starting ramping to 400 A on TGHT and 280A on TBHT  Wednesday, April 26, 2023, 14:26 The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed Wednesday, April 26, 2023, 14:42 pressure hovering around good vacuum so very slow progress. Wednesday, April 26, 2023, 15:12 TGHT= 223 A, 3.1 V TBHT = 226 A, 3.0 V Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.  Vacuum spike at 300A. Currently: TGHT= 316A, 4.6V TBHT=283A, 3.9V Wednesday, April 26, 2023, 18:18 Ramping TBHT down from 280A to 270A

 Wednesday, April 26, 2023, 22:12

TGHT = 400A, 6.1V; TBHT = 274A/3.7V. Temp is holding sturdy ~1100 C and will leave it overnight.

Pressure is coming down, currently at 8.8 e-6 Torr.  See attachment for the overview. 

TGHT will continue to ramp up tomorrow morning; check the pressure to ensure it has come down below 5e-6 Torr before proceeding.  Refer to the instructions for details.   

John Wong wrote:

Carla Babcock wrote: Darwin Ortiz Rosales wrote: Wednesday, April 26, 2023, 09:32 LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses 50 packs of 5 and the rest are singles TaC coated (sintered) springs placed at both ends Initial total Weight = 521.83 g Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT OMEGA slope = 0.99 Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr Vacuum limit up after 200A: 3.0e-05 Torr -- 5.5e-05 Torr No Ta heat-shields used Initial IGP1 = 4.1e-07 Torr Wednesday, April 26, 2023, 09:49 Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min Wednesday, April 26, 2023, 12:50 Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done. Wednesday, April 26, 2023, 14:03 IGP1 = 6.0 e-05 Torr TGHT = 200 A, 2.7V TBHT = 200 A, 2.6 v OMEGA = Below lower limit Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT. Wednesday, April 26, 2023, 14:13 IGPI= 4.2 e-05 Torr starting ramping to 400 A on TGHT and 280A on TBHT  Wednesday, April 26, 2023, 14:26 The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed Wednesday, April 26, 2023, 14:42 pressure hovering around good vacuum so very slow progress. Wednesday, April 26, 2023, 15:12 TGHT= 223 A, 3.1 V TBHT = 226 A, 3.0 V Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.  Vacuum spike at 300A. Currently: TGHT= 316A, 4.6V TBHT=283A, 3.9V Wednesday, April 26, 2023, 18:18 Ramping TBHT down from 280A to 270A  Wednesday, April 26, 2023, 22:12 TGHT = 400A, 6.1V; TBHT = 274A/3.7V. Temp is holding sturdy ~1100 C and will leave it overnight. Pressure is coming down, currently at 8.8 e-6 Torr.  See attachment for the overview.  TGHT will continue to ramp up tomorrow morning; check the pressure to ensure it has come down below 5e-6 Torr before proceeding.  Refer to the instructions for details.

 Thursday, April 27, 2023, 06:27

IGP1= 1.7e-06 Torr

OMEGA= 1097 C

TGHT= 400A, 6.2V

TBHT= 273A, 3.7 V

Starting ramp up of TGHT @0.2A/min set to 550A

Darwin Ortiz Rosales wrote:

John Wong wrote: Carla Babcock wrote: Darwin Ortiz Rosales wrote: Wednesday, April 26, 2023, 09:32 LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses 50 packs of 5 and the rest are singles TaC coated (sintered) springs placed at both ends Initial total Weight = 521.83 g Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT OMEGA slope = 0.99 Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr Vacuum limit up after 200A: 3.0e-05 Torr -- 5.5e-05 Torr No Ta heat-shields used Initial IGP1 = 4.1e-07 Torr Wednesday, April 26, 2023, 09:49 Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min Wednesday, April 26, 2023, 12:50 Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done. Wednesday, April 26, 2023, 14:03 IGP1 = 6.0 e-05 Torr TGHT = 200 A, 2.7V TBHT = 200 A, 2.6 v OMEGA = Below lower limit Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT. Wednesday, April 26, 2023, 14:13 IGPI= 4.2 e-05 Torr starting ramping to 400 A on TGHT and 280A on TBHT  Wednesday, April 26, 2023, 14:26 The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed Wednesday, April 26, 2023, 14:42 pressure hovering around good vacuum so very slow progress. Wednesday, April 26, 2023, 15:12 TGHT= 223 A, 3.1 V TBHT = 226 A, 3.0 V Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.  Vacuum spike at 300A. Currently: TGHT= 316A, 4.6V TBHT=283A, 3.9V Wednesday, April 26, 2023, 18:18 Ramping TBHT down from 280A to 270A  Wednesday, April 26, 2023, 22:12 TGHT = 400A, 6.1V; TBHT = 274A/3.7V. Temp is holding sturdy ~1100 C and will leave it overnight. Pressure is coming down, currently at 8.8 e-6 Torr.  See attachment for the overview.  TGHT will continue to ramp up tomorrow morning; check the pressure to ensure it has come down below 5e-6 Torr before proceeding.  Refer to the instructions for details.         Thursday, April 27, 2023, 06:27 IGP1= 1.7e-06 Torr OMEGA= 1097 C TGHT= 400A, 6.2V TBHT= 273A, 3.7 V Starting ramp up of TGHT @0.2A/min set to 550A

 Reached 550A on TGHT (paused there until I realized it was stopped) then resumed ramping to 580A at 0.2A/min. Saw both vacuum spikes before 550A. Attaching screenshot from John.

Darwin Ortiz Rosales wrote:

John Wong wrote: Carla Babcock wrote: Darwin Ortiz Rosales wrote: Wednesday, April 26, 2023, 09:32 LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses 50 packs of 5 and the rest are singles TaC coated (sintered) springs placed at both ends Initial total Weight = 521.83 g Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT OMEGA slope = 0.99 Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr Vacuum limit up after 200A: 3.0e-05 Torr -- 5.5e-05 Torr No Ta heat-shields used Initial IGP1 = 4.1e-07 Torr Wednesday, April 26, 2023, 09:49 Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min Wednesday, April 26, 2023, 12:50 Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done. Wednesday, April 26, 2023, 14:03 IGP1 = 6.0 e-05 Torr TGHT = 200 A, 2.7V TBHT = 200 A, 2.6 v OMEGA = Below lower limit Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT. Wednesday, April 26, 2023, 14:13 IGPI= 4.2 e-05 Torr starting ramping to 400 A on TGHT and 280A on TBHT  Wednesday, April 26, 2023, 14:26 The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed Wednesday, April 26, 2023, 14:42 pressure hovering around good vacuum so very slow progress. Wednesday, April 26, 2023, 15:12 TGHT= 223 A, 3.1 V TBHT = 226 A, 3.0 V Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.  Vacuum spike at 300A. Currently: TGHT= 316A, 4.6V TBHT=283A, 3.9V Wednesday, April 26, 2023, 18:18 Ramping TBHT down from 280A to 270A  Wednesday, April 26, 2023, 22:12 TGHT = 400A, 6.1V; TBHT = 274A/3.7V. Temp is holding sturdy ~1100 C and will leave it overnight. Pressure is coming down, currently at 8.8 e-6 Torr.  See attachment for the overview.  TGHT will continue to ramp up tomorrow morning; check the pressure to ensure it has come down below 5e-6 Torr before proceeding.  Refer to the instructions for details.         Thursday, April 27, 2023, 06:27 IGP1= 1.7e-06 Torr OMEGA= 1097 C TGHT= 400A, 6.2V TBHT= 273A, 3.7 V Starting ramp up of TGHT @0.2A/min set to 550A

 Thursday, April 27, 2023, 22:04

TGHT has reached 580A/10.33V. Temp = 1540C. 

The two out-gassing peaks were observed: 1st peak around 1300C and 2nd peak 1370C.  See attachments 1 & 2.

A few minutes after TGHT reached to 580A, there was a small jump in TGHT current/voltage and also the pressure, but didn't notice any change in the temp, see attachment 3&4. 

Pressure is currently at 3.4e-6 Torr; will hold TGHT until pressure reaches close to 1e-6 Torr before cooling down. 

 Friday, April 28, 2023, 01:06

Pressure has reached 1.8 e-6 Torr; TGHT has been holding at 580A for 3.5 hrs, a slight increase in voltage, reading at 10.45V and temperature, 1548C.  See attachment #5 for overview.

Initiating auto-cooling TGHT at -2A/min, TBHT at -1A/min.