Aurelia Laxdal wrote:

Aurelia Laxdal wrote: Anders Mjos wrote: Laura Lambert wrote: Aurelia Laxdal wrote: Started Ta#47 heating at Evap2 using the autoramp program. The TGHT current is setup to go to 300A (for now) and the TBHT to 230A (final value).  Monday, March 14, 2016, 09:20 One thermocouple was not welded on correctly and is not working.  Cooling evap2 back down, to remove target and re-weld thermocouple. Once thermocouple replaced, will ramp back up and continue with tests/ conditioning of target.    Monday, March 14, 2016, 13:12: Stopped turbo pump  After EVAP2 was vented the thermocouple problem was fixed: it was the wire at on connector inside the box not making proper contact. The lid of the heat shield was also replaced since the one initially mounted had no holes, so one couldn't see the center block. Restarted pumping down at 4:30pm. Just started again the autoramp program: TGHT set to 300A (for the time being) and TBHT to 230A. Temperature measurements will resume tomorrow morning.  Raised the TGHT at 620A. The TBHT was already set at 230A. The temperature is at 1902 deg C. As per John's instructions the target will condition at these setpoints over the week-end.

Today, lowered the TGHT from 620A (at 1894 deg C) to 300A.  TBHT is still at 230A.

Aurelia Laxdal wrote:

Aurelia Laxdal wrote: Aurelia Laxdal wrote: Anders Mjos wrote: Laura Lambert wrote: Aurelia Laxdal wrote: Started Ta#47 heating at Evap2 using the autoramp program. The TGHT current is setup to go to 300A (for now) and the TBHT to 230A (final value).  Monday, March 14, 2016, 09:20 One thermocouple was not welded on correctly and is not working.  Cooling evap2 back down, to remove target and re-weld thermocouple. Once thermocouple replaced, will ramp back up and continue with tests/ conditioning of target.    Monday, March 14, 2016, 13:12: Stopped turbo pump  After EVAP2 was vented the thermocouple problem was fixed: it was the wire at on connector inside the box not making proper contact. The lid of the heat shield was also replaced since the one initially mounted had no holes, so one couldn't see the center block. Restarted pumping down at 4:30pm. Just started again the autoramp program: TGHT set to 300A (for the time being) and TBHT to 230A. Temperature measurements will resume tomorrow morning.  Raised the TGHT at 620A. The TBHT was already set at 230A. The temperature is at 1902 deg C. As per John's instructions the target will condition at these setpoints over the week-end. Today, lowered the TGHT from 620A (at 1894 deg C) to 300A.  TBHT is still at 230A.

 Cooling down the target.

Aurelia Laxdal wrote:

Aurelia Laxdal wrote: Aurelia Laxdal wrote: Aurelia Laxdal wrote: Anders Mjos wrote: Laura Lambert wrote: Aurelia Laxdal wrote: Started Ta#47 heating at Evap2 using the autoramp program. The TGHT current is setup to go to 300A (for now) and the TBHT to 230A (final value).  Monday, March 14, 2016, 09:20 One thermocouple was not welded on correctly and is not working.  Cooling evap2 back down, to remove target and re-weld thermocouple. Once thermocouple replaced, will ramp back up and continue with tests/ conditioning of target.    Monday, March 14, 2016, 13:12: Stopped turbo pump  After EVAP2 was vented the thermocouple problem was fixed: it was the wire at on connector inside the box not making proper contact. The lid of the heat shield was also replaced since the one initially mounted had no holes, so one couldn't see the center block. Restarted pumping down at 4:30pm. Just started again the autoramp program: TGHT set to 300A (for the time being) and TBHT to 230A. Temperature measurements will resume tomorrow morning.  Raised the TGHT at 620A. The TBHT was already set at 230A. The temperature is at 1902 deg C. As per John's instructions the target will condition at these setpoints over the week-end. Today, lowered the TGHT from 620A (at 1894 deg C) to 300A.  TBHT is still at 230A.  Cooling down the target.

Thursday, March 24, 2016, 11:29 

Target was removed from the Evaporator.  

The thermocouples broke off.  

Need to insert Re foil prior to installing

John Wong wrote:

Aurelia Laxdal wrote: Aurelia Laxdal wrote: Aurelia Laxdal wrote: Aurelia Laxdal wrote: Anders Mjos wrote: Laura Lambert wrote: Aurelia Laxdal wrote: Started Ta#47 heating at Evap2 using the autoramp program. The TGHT current is setup to go to 300A (for now) and the TBHT to 230A (final value).  Monday, March 14, 2016, 09:20 One thermocouple was not welded on correctly and is not working.  Cooling evap2 back down, to remove target and re-weld thermocouple. Once thermocouple replaced, will ramp back up and continue with tests/ conditioning of target.    Monday, March 14, 2016, 13:12: Stopped turbo pump  After EVAP2 was vented the thermocouple problem was fixed: it was the wire at on connector inside the box not making proper contact. The lid of the heat shield was also replaced since the one initially mounted had no holes, so one couldn't see the center block. Restarted pumping down at 4:30pm. Just started again the autoramp program: TGHT set to 300A (for the time being) and TBHT to 230A. Temperature measurements will resume tomorrow morning.  Raised the TGHT at 620A. The TBHT was already set at 230A. The temperature is at 1902 deg C. As per John's instructions the target will condition at these setpoints over the week-end. Today, lowered the TGHT from 620A (at 1894 deg C) to 300A.  TBHT is still at 230A.  Cooling down the target.   Thursday, March 24, 2016, 11:29  Target was removed from the Evaporator.   The thermocouples broke off.   Need to insert Re foil prior to installing

 Tuesday, April 19, 2016, 09:28: Uploaded thermoucouple data.

Monday, February 08, 2021, 17:00: Installed brackets w/ Ta wire and a small piece of Re to test voltage drop.

Rough down, TP on. Waterlines open.

Tuesday, February 09, 2021, 06:44: Vacuum @ 8.63e-07T.

Tuesday, February 09, 2021, 06:45: Shut TP & roughing pump ff. Valves are close. Ready for power outage.

Tuesday, February 09, 2021, 11:30: BP1 & TP1 back on.

Tuesday, February 09, 2021, 11:37: PS on. Vacuum @ 9.7e-06T & continuing down.

micron slope 0.98

Tuesday, February 09, 2021, 16:01 Pressure 7.26e-7 Torr

aiming at a temperature of 2000 degC on the wire; wire is not in the visual range of pycnometer; simulations of the system indicate that wire will be at 2000 degC at 60 W, hence current will be increased slowly.

Rate: 0.1 A/60 s to 10 A

Tuesday, February 09, 2021, 16:47 Tendence showed that at 5 A the power will be ~10 W, final ramping step was updated accordingly.

Tuesday, February 09, 2021, 16:49 Pressure dropping a bit: Current reading 7e-7 Torr

Tuesday, February 09, 2021, 17:09Pressure going down, curent will be ramped down at 0.2 A/min

Pressure: 6.958e-7 Torr, TGHT: 5 A, 2.748 V, omega is reading 1625 degC somewhere somehow, wire will stay at this conditions for 10 min to see  if there is a pressure or voltage change.

Tuesday, February 09, 2021, 17:16 voltage and temperature are slowly increasing  2.789 V, and 1688 degC respectively.

Tuesday, February 09, 2021, 17:32 Voltage signal is noisy but it seems like the voltage is not increasing anymore, preassure has remained constant, wire is glowing, 1100 degC with manual pyrometer.

Tuesday, February 09, 2021, 17:44 TGHT: 2.81 V, 4.95 A, IGP1 6.63e-7 Torr. current will be increased manually at 0.2 A steps. At first step voltage is stable.

Tuesday, February 09, 2021, 18:13 TGHT: 6.6A, 3.981V (~26W), Omega 1741 degC and manual pyrometer ~1300 degC

Tuesday, February 09, 2021, 18:28 TGHT: 8A, 5.121V (~40W), omega 1816 degc, 1390 degC with manual pyrometer, step changed to 0.4A.

Tuesday, February 09, 2021, 18:34 TGHT: 8.8A, 5.88V (50W), omega 2008 degC, 1500 manual pyrometer

Tuesday, February 09, 2021, 18:56  TGHT: 9.6A, 6.64V, manual pyrometer 1800 degC, omega 2042 degC, wire is shinny enough for micron 2092 degC.

Tuesday, February 09, 2021, 19:01TGHT: 10A, 7V, ~1800 degC manual pyrometer, omega 2123 degC, micron 2152 degC

Tuesday, February 09, 2021, 19:15 TGHT: 10.5A, 7.47V, 2150 degC Omega, 2165 degC, ~1800 degC manual

Tuesday, February 09, 2021, 19:23 TGHT: 11A, 7.93 V, 2188 omega, 2210 deC micron

 Tuesday, February 09, 2021, 19:29 TGHT: 11.5A, 8.37V, 2188 omega, 2210 deC micron

Tuesday, February 09, 2021, 19:33 TGHT: 12A, 9V, 2325 degC, 1900 degC manual, the wire changed shape and the preassure increase a bit , micron was readjusted to read, micron 2454 degC. Wire might be touching tube, only one more amper will be imputed.

Tuesday, February 09, 2021, 19:55 TGHT 13A, 9.865 V, 2404 degC omega , 2558 degC micron, manual pyrometer still reads 1800 degC, pressure increased with the power increment, bbut it seems like the wire touching the tube so no more current will be imputed.

Tuesday, February 09, 2021, 20:08 started ramping at -0.2A/min

Wednesday, February 10th , 20211, 10:00 System unloaded from EVAP2, wire has straightened, it has not sintered to the copper brackets, system is clean there is no evidence of coating.

There was no signal going from the coils to the PLC. After manipulating the connection points on the coil a signal could again be established. Frequency is ~ 40Hz.

Tuesday, November 04, 2014, 16:08

The purpose of this experiment is to improve the fabrication of SiC.  Previously, the SiC target was heated to 2000c and yellow crystals were observed.

In this experiment, 10g of SiC powder (7um size) was previously milled down (actual size to be determined under SEM).  The powder was mixed with 5% PVA and the slurry was pour onto a glass and let dry.  The semi-dry slurry was rolled up into balls. The SiC balls were let dry in over (115C) over night. Taken out 2.903g SiC + 5% PVA, it's rolled up with a small sheet of graphite foil.  Then the targer boat is filled with the sample and wrapped with 3-layers of Ta-heat shield.

The sample will be heated up to 2000C to see if the yellow crystals are reproducible.  It is suspected that there might be a phase transformation from 6H alpha-SiC to 3C beta-SiC. 

Chamber is currently being pumped down... 

Wednesday, November 05, 2014, 14:04

TGHT was ramped up over night, currently at 485A = 1800 C. 

Will do manual step up to get to 2000C. 

1st test polarity 1

10:12 am Begin pumping down to rough vacuum
12:50 pm begin ramping up towards 2000C. Ta tube only, welded thermocouple mount
3:08 Ta tube reached 2000C, began ramping down. The ramping up process was smooth and no hiccups happened
4:57 ramp down complete, began shutting down the evap2, will let the turbopump to slow down spin overnight.

2nd test polarity 2(swapped)

Tuesday, Aug 09 2022, 4pm begin pumping to vacuum after switching the polarity of the power supply

Wednesday, August 10, 2022, 13:09 begin ramping up

3:18 ramped to 671A. 2000C, no hiccups, everything is nominal. The thermocouple reads higher than before, about 20-30 deg C colder than pyro at high temperatures (1400C and above)

No bad connections, short circuits or unexpected overheating.

begin ramping down

ramping down was smooth, with error being the TC about 40 deg C colder than pyro at temp above 1500C

ramping done completed at Wednesday, August 10, 2022, 16:46 , shutting down evap 2 roughing and turbopump

Tuesday, June 27, 2022, early afternoon: We assembled the setup in evap2 and started the pumps leaving it running over night.

Tuesday, June 28, 2022, 09:31 Turbo pump stopped for unknown reasons a few hours after we left. Restarting the pump.

Tuesday, June 28, 2022, 10:23 Vacuum down to 1e-5T start to ramp up TGHT 1A/10s to 200A.

Tuesday, June 28, 2022, 1:20 pm, Ramped from 0-500A. thermocouple reading 900C while pyrometer reads 1600C. begin ramping down to 0A.

 11am: Setting up new target tube thermocouple test

Thursday, August 04, 2022, 09:31 Test finished August 3rd afternoon. Venting now.  

 Tuesday, May 15, 2012, 17:03

The tube heater power supply current readback and setpoint are not matching.  Ray Dube checked the power supply and confirmed that it is faulty.  He will replace a functional p/s tomorrow. 

 Friday, May 18, 2012, 13:24

The original p/s was replaced with a new one and there was still a discrepancy between the readback and the setpoint.  After checking with the drawings for the ITE/ITW tube heaters, it was confirmed that the connections for the Evap#2 tube heater control were wrong.  (see attachment 1).  The connections were corrected and the power supply is now operational. 

 Tuesday, May 15, 2012, 17:00

It was found that there were water droplets from the TBHT cooling line.  The joint is leaky.  (see attachment 1) 

A message has sent to Rick M. 

John Wong wrote:

Tuesday, May 15, 2012, 17:00 It was found that there were water droplets from the TBHT cooling line.  The joint is leaky.  (see attachment 1)  A message has sent to Rick M.

 Wednesday, May 16, 2012, 14:01

The connector was re-tighten.  The water valve was opened, and no water leaks were found.

Tuesday, June 21, 2022, 09:43

Total number of foils: 377 ( including 6 analysis discs on the right side of the container)

Total weight = 1454 g (includes heatshields, spring and T bar)

Total length packed 15.5 cm (excluding 6 analysis discs that will be removed)

container has 3 Ta heat shields and is coated

No endcaps inserted to facilitate out-gassing

Ta coated spring at  front (right) side

Initially to ramp TGHT and TBHT to 80A at 2 A/min

then to 120A and slow down ramp when pressure begins to increase

max approx 675A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1=3.6 e-07 Torr at start of initial ramp.

Tuesday, June 21, 2022, 13:54

IGP1= 7.1 e-05 and dropping.  Start ramp to 150A for both TGHT and TBHT @1A/min

Tuesday, June 21, 2022, 21:27

Increased ramp rate to 3A/min for TGHT to 675A

Tuesday, June 21, 2022, 22:38

Ramp up to 685 A on TGHT and leave for 4 hours. 

OMEGA = 1645 C but suspect reading not on Ta surface.

Wednesday, June 22, 2022, 02:28

IGP1=7.7e-6 Torr

OMEGA =1610C

TGHT = 685A, 10.5V

TBHT = 230A, 3V

initiate rampdown at -2A/min and -1Amin TGHT and TBHT

Tuesday, June 07, 2022, 07:19

Total number of foils: 403 ( including 5 analysis discs on the right side of the container)

Total weight = 1535.3 g (includes heatshields, spring and T bar)

Total length packed 16.4 cm (excluding 5 analysis discs that will be removed)

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Ta coated spring at  front (right) side

Initially to ramp TGHT and TBHT to 50A at 3 A/min

then continue to 80A and slow down ramp when pressure begins to increase

max approx 700A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 7.6 e-07 Torr at start of initial ramp.

 Tuesday, June 07, 2022, 11:14

Ramping to 150A on TGHT and TBHT at 1A/min

Ramped TGHT and TBHT to 230A at 2A/min

Tuesday, June 07, 2022, 13:12

Ramping TGHT to 600A at 4A/min

TBHT at 230A, 3.0V

Tuesday, June 07, 2022, 16:41

TGHT= 740 A, 12.1V

TBHT= 232A, 3.0 V

OMEGA reading 1616C but questionable.  Will leave for 4 hours at 740A top TGHT.

Wednesday, June 08, 2022, 22:15

Early Wednesday morning the left TGHT bolt was found damaged.  The target leg was coated with bolt material rendering the Target inoperable.   

The Heatshield assembly was swapped and surfaces cleaned.  A "dummy" FEBIAD was installed to test if the system can withstand high current. 

The system was pumped down and ramped to 740A on TGHT at 4A/min.  It was then left at that current for 4 to 5 hours.

Currently starting rampdown at -2A/min to 0A. 

Photos of the incident attached in *eLog 580*.  IGP1= 5.7e-06 Torr

TGHT= 742A, 11.4V

 Wednesday, May 18, 2022, 09:46

Total number of foils: 415 ( including 10 analysis discs on the right side of the container)

Total weight = 1580 g (includes heatshields and T bar)

Total length packed 17 cm (including 10 analysis discs that will be removed)

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Ta coated spring at  front (right) side

Initially to ramp TGHT and TBHT to 30A at 3 A/min

then continue to and slow down ramp when pressure begins to increase

max approx 700A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 7.1 e-07 Torr at start of initial ramp.  Note, first real operation with new noisy Turbo Pump.

Wednesday, May 18, 2022, 10:18

Pressure increase observed starting around 60A.  Ramped to 70 A and will leave until pressure stabilizes

After about 30 minutes pressure dropped so ramped up to 90 A @1A/min on both TGHT and TBHT

Wednesday, May 18, 2022, 11:37

pressure spike around 90A.  will leave until pressure stabilizes 

Wednesday, May 18, 2022, 12:54  

start autoramp to 100A at 1A/min.  IGP1= 1.4e-4 Torr

Wednesday, May 18, 2022, 13:15

autoramp to 150A @1A/min 

Wednesday, May 18, 2022, 13:41

 At 110A another spike in pressure.  System waiting for good vacuum

Wednesday, May 18, 2022, 15:24

ramped to 150A on both TGHT and TBHT.  Ramping to 200 A at @A/min for both TGHT and TBHT

currently IGP1=  2.0e-4 Torr

Wednesday, May 18, 2022, 15:33  

Pressure still trending down; therefore will start ramp at 4A/min to 400 amp on TGHT and 230A to TBHT

Wednesday, May 18, 2022, 16:22 

Increasing ramp to 4A/min on TGHT

Wednesday, May 18, 2022, 17:26 

switched to 6A/min in 1A/10s increments on TGHT

Wednesday, May 18, 2022, 17:43 

Set final current to 730 A as per regression attached.

Wednesday, May 18, 2022, 17:54

Final current on TGHT = 740A, 11.9 V

OMEGA = 1775 C

TBHT = 230A, 

Will leave for 4 hours

Wednesday, May 18, 2022, 19:56

Temperature dropped so increased current to 755A for the remaining of the time.

Friday, May 20, 2022, 08:58

Final notes:  The difference between initial and final mass was 6 g as expected.  Slight coating on window of evaporator may explain apparent temperature drop.  Next time will keep current at projected setting.  The material looks good with slight overheating on the outer discs of left side.

Thursday, November 24, 2022, 11:01

Target container contains one disc of e-spun TiO2/PAN fibrous disc, (Ref sample P-134).

Sample will be heated to 1875C, similar to the previous process, see e-log ID#599.

TGHT will be autoramped to 350 A and monitor the conditions before ramping up further.

Good vacuum: 3e-5 Torr

Bad vacuum: 5e-5 Torr

Omega slope: 0.99

Initiate autoramp: 1 A/min

Chamber has been pumped down below 5.0e-6 Torr.

 Friday, November 25, 2022, 08:38

TGHT reached to 348A/5.8V; temp is holding at 1600 C since 19:00 yesterday, see attachment#1.

Stepping up TGHT to 400A and continue to monitor.

 Friday, November 25, 2022, 09:45

TGHT reached to 400A/6.8V; temp holding at 1758C.  Pressure coming down from 6.6e-7 Torr.

Ramping up to 410A.

 Friday, November 25, 2022, 12:28

TGHT reached 410A/7.08V.  temp holding at 1790 C.  Pressure coming down from 6.9e-7 Torr. 

Ramping up to 430A.

 Friday, November 25, 2022, 13:01

TGHT reached 430A/7.4V. Temp holding at 1837 C.  Pressure coming down from 7.73e-7 Torr.

Ramping up to 440A.

 Friday, November 25, 2022, 13:50

TGHT reached to 440A/7.6V.  Temp holding at 1864C.  Tapping TGHT to 444A (readback 443A - 449 A)/7.7V. 

Desired Temp has reached, 1875 C.  Will continue to hold on this temp over the weekend.

 Sunday, November 27, 2022, 21:14

TGHT has been holding at 442A (lowered by 2 A on Fri to maintain 1875C).  Temp increased to 1887C.  Pressure at 2.5e-7 Torr. 

See attachment#2 for plots/temp. 

Initiated cooling at 1A/min.

 Tuesday, October 18, 2022, 13:52

38 pieces of samples made of TiO2/C/PVP loaded into a target boat wrapped with 2 layers of Ta-heat shield.

Samples will be heated to 1700, 1800, 1900, and 2000 C

Some of the pieces will be removed after each target temperature 

Target chamber has been pumping down and the current pressure reading is 6.62e-6 T

 Tuesday, October 18, 2022, 14:12

TGHT will be autoramped to 250 A

Good vacuum: 3e-5 Torr

Bad vacuum: 5e-5 Torr

Omega slope: 0.99

Initiate autoramp: 1 A/min

Hannah Toy wrote:

Tuesday, October 18, 2022, 13:52 38 pieces of samples made of TiO2/C/PVP loaded into a target boat wrapped with 2 layers of Ta-heat shield. Samples will be heated to 1700, 1800, 1900, and 2000 C Some of the pieces will be removed after each target temperature  Target chamber has been pumping down and the current pressure reading is 6.62e-6 T  Tuesday, October 18, 2022, 14:12 TGHT will be autoramped to 250 A Good vacuum: 3e-5 Torr Bad vacuum: 5e-5 Torr Omega slope: 0.99 Initiate autoramp: 1 A/min

 Wednesday, October 19, 2022, 09:42

TGHT has reached to 250A/3.95V, Temp at ~1100 C.  (The archiver is currently not working; already contacted Control to look into it.)

Pressure reached below 4.9 e-7 Torr. 

Auto-ramp to 300 A at 2A/min.  Continue to monitor.

 Wednesday, October 19, 2022, 10:24

TGHT reached to 300 A/4.89V.  Temp at 1206 C. 

Pressure went up slightly and came down after the TGHT setpoint was reached, see attachment#1.

Continue to auto-ramp to 350A at 2A/min.

 Wednesday, October 19, 2022, 11:35

TGHT reached to 350A/5.8V.  Temp at 1360C.

Pressure reached above 1e-6 Torr and came down after TGHT reached the setpoint. 

Continue to auto-ramp to 400 A at 2A/min

 Wednesday, October 19, 2022, 11:57

TGHT reached to 400 A/6.89V.  Temp at 1485C.

Pressure went up to 3.3e-6 Torr and came down after TGHT reached the setpoint,  see attachment#2.

A temp vs current plot has been generated (see shared folder \Hannah\) - est TGHT 480A to reach 1700 (T1).

Auto-ramp to 420 at 1A/min.  Continue to monitor closely...

 Wednesday, October 19, 2022, 13:01

TGHT reached 420A/7.23V, Temp at 1520 C.

Continue auto-ramping to 440A at 1A/min.

 Wednesday, October 19, 2022, 13:42

TGHT reached 440A/7.65V.  Temp at 1572 C

Continue auto-ramping to 460A at 1A/min.

Wednesday, October 19, 2022, 14:10

TGHT reached to 460A/8.10 V.  Temp at 1628 C.

Tapping up TGHT to reach 1700 C

 Wednesday, October 19, 2022, 15:33

TGHT was tapped up to 474A, Temp reached to 1700 C since 14:30.

Pressure is slowing coming down, currently at 1.4 e-6 Torr.

Will hold at this target current for a few hours.

 Wednesday, October 19, 2022, 16:58

Temp went up slightly to 1713 C as the pressure is coming down. 

Lower TGHT to 468A/8.45V to maintain the temp at 1700 C.

 Wednesday, October 19, 2022, 19:55

Temp went up again to 1716 C, but this time the pressure also went up, see attachment#3.  Not sure why the target got hotter... the voltage seems normal and consistent. 

Lower TGHT to 462A/8.44V to maintain at 1700 C. 

Continue monitoring...

 Wednesday, October 19, 2022, 22:56

Temp went up another 10 C, to 1710 C, TGHT is holding at 462 A/8.48V.  Notice the TGHT current readback is fluctuating between 458A - 463 A. 

Initiated cooling.. 2A/min

 Friday, October 21, 2022, 08:55

 All the samples were taken out from the Evap on Thursday Oct 20.  We decided to do so because there was not enough sample in each batch for XRD analysis.  All the sample will be analyzed as treated at 1700 C. 

See attachement #$ for the overall TGHT/Vac plot.

 Previous TP would only spin up to 4KRPM. New TP installed.

Monday, June 05, 2023, 14:50: Roughing. 

Monday, June 05, 2023, 15:10: Controller reset. TP on.