Thursday, July 12, 2012, 17:29

NiO was sprayed on Ni foil.

Average/discs: mass= 0.075g, thickness=0.076mm, density = 7.023g/cm3.

4 set of samples were loaded onto the targetboat (coated/sintered with TaC).  A piece of Ta foil was used as the under layer (see attachment #1).

A 0.002" thick Ta foil was wrapped around the container as the heat-shield.

The chamber was pumped down to 5.0e-6 Torr before the cooling water valve was opened; no leaks was detected.

For this process, the target heater will only go up to 250A (~1100C), with auto-ramping rate at 0.5A/min.

The heater has been stepped up to 50A, local 32A/ 0.23V.  The vacuum reached to max 1.6e-5 Torr, and it's coming down.

Thursday, July 12, 2012, 17:51

Auto-ramping initiated...

 Friday, July 13, 2012, 09:42

TGHT reached to 250A and stayed for 6 hrs (see attachment #2).  At that current, the target wasn't glowing so the temperature could not be measured. 

Initiated auto-cooling at 2A/min. 

Friday, July 13, 2012, 11:00  

TGHT reached to 65A.  Stopped the auto-cooling process and manually tapped down the p/s to 0A.  

Vacuum is stable at 5.7e-7 Torr.  

In the next 30 min or so, the chamber will be vented and the NiO target material will be taken out for inspection. 

Tuesday, July 17, 2012, 15:45

Target boat is filled with TaC coated regular- and D-endcaps. 

The boat is wrapped with a Ta heat-shield. 

Chamber is being pumped down, currently at 5e-6 Torr.

Tuesday, July 17, 2012, 15:58

Heat-shield cooling water valve opened; no leaks detected.

Initiated TGHT auto-ramping at 0.5A/min, set TGHT max at 580A.

 Wednesday, July 18, 2012, 10:44

Yesterday evening, the target heater tripped off a few times due to high vacuum excursion.  The TGHT ramping rate was low to 0.2A/min.  The current was ramped up sturdily to 500A this morning.  

Wednesday, July 18, 2012, 10:46

Increased ramping rate to 2A/min.  Vacuum currently at 2.2e-6 Torr.

 Wednesday, July 18, 2012, 16:18

TGHt has reached to 580A and stayed for about 5 hrs. 

Cooling down in process...  2A/min for TGHT --> 0A.

 Thursday, July 19, 2012, 10:31

TGHT reached to 0A. 

Evaporator is off. 

Venting chamber... 

Tuesday, August 27, 2013, 16:48

Target boat is filled with TaC coated endcaps (brown) and some partial sinterred ones (gray) from before.  (see attachment#1).

The container is wrapped with Ta heat-shield.

Chamber has been pumped down; IG currently @ 7.3e-7 Torr. 

Heat-shield cooling water valves are open; no leaks are detected.

Initiated TGHT auto-ramping at 0.5A/min, set TGHT max at 580A.

 Wednesday, August 28, 2013, 16:09

TGHT has reached to 580A and been heated for over 4 hours.

IG is coming down, currently at 1.9 e-6 Torr.

Initiated auto-cooling.  2A/min. 

John Wong wrote:

Tuesday, August 27, 2013, 16:48 Target boat is filled with TaC coated endcaps (brown) and some partial sinterred ones (gray) from before.  (see attachment#1). The container is wrapped with Ta heat-shield. Chamber has been pumped down; IG currently @ 7.3e-7 Torr.  Heat-shield cooling water valves are open; no leaks are detected. Initiated TGHT auto-ramping at 0.5A/min, set TGHT max at 580A.  Wednesday, August 28, 2013, 16:09 TGHT has reached to 580A and been heated for over 4 hours. IG is coming down, currently at 1.9 e-6 Torr. Initiated auto-cooling.  2A/min.

 Thursday, August 29, 2013, 11:50

TGHT at 0 A

IG at 3.5e-7 Torr

Turning off EVAP2 and venting chamber

Process complete

 Tuesday, January 19, 2016, 14:19

SiC nanofiber was prepared at UBC Material Engineering Sci.  

4 samples are loaded in a Ta target contained (sintered with TaC coating): 

Sample 1: 

size:  21.70 x 21.54 mm, mass: 0.0762g, thick: 0.224mm

Sample 2: 

size: 20.89mm x 23.95mm, mass: 0.0954g, thick: 0.232mm 

--> Sample 1 and 2 with graphite backing foil 

Sample 3: 

size: 22.55 x 25.56mm, mass: 0.0082g, thick: 0.110mm

Sample 4: 16.93 x 23.82mm, mass: 0.0048g, thick: 0.086mm

--> Sample 3 and 4 with no graphite backing foil. 

(see attachment) 

Test#1:  Heating temperature at 1600C for 24hrs. 

TGHT will be adjusted accordingly.  There are 2 Ta-heat shields wrapped around the container. 

Chamber is currently being pumped down.

 Tuesday, January 19, 2016, 16:19

Vacuum at 2.0e-6 Torr.

For 1600C, expected current is around 350A.

Stepping up TGHT gradually...

 Wednesday, January 20, 2016, 14:34

TGHT was ramped up to 390A/6.63V to reach 1600C.  Samples have been heated at that temp since 11pm last night.

Visual check on the fibers seem ok (see attachment).

Will continue to heat this for a total time of 24hours.

 Wednesday, January 20, 2016, 22:57

Samples have been heated at 1600C for 24hours. 

Initiated cooling at 1A/min.

 Wednesday, January 27, 2016, 12:34

First attempt - heating 1600C.  XRD result showed board "bumps" that could be SiO2? It is inconclusive. 

Second attempt - re-heating the same samples, namely

Sample 1 - only the fiber

Sample 2 - with graphite backing.  This sample is loaded with the fiber facing down to see how well it holds on the graphite foil.  (see attachment)

TGHT will be ramped up to reach 1800C

Chamber is currently being pumped down.

 Wednesday, January 27, 2016, 14:04

Water valves open; no leaks detected.

Ramping up TGHT to 400A at 2A/min

 Wednesday, January 27, 2016, 18:08

TGHT is at 481A to obtain 1800C.

Visual check on Sample 2 - fiber has fallen off graphite backing foil.

Will remain heated at this temperature for over night.

 Friday, February 12, 2016, 11:11

Heat treatment test#1 is complete.  XRD results are inconclusive.  Need to do EDX to determine Si/SiO2.  

(See my dropbox for more details)

Tuesday, September 17, 2013, 11:14

Target boat contains 5 Nb discs.  3 discs are wraps with 0.001" thin of Nb foil (99.8% pure), and 2 are wraps with 0.001" Ta foil (see attachment#1)

Chamber has been pumped down over night.  Pressure is currently at 9.8e-7 Torr. 

Heating instructions:

Samples will be heated up to 800C.  TGHT will be ramped up accordingly. (Two thermocouples are wielded on the target container.)

Once at the desired temperature; the samples will be heat for 4 hours before cooling down.

 Tuesday, September 17, 2013, 14:37

Target temperature has reached to 800C at around 13:00 (see attachment#2)

TGHT @ 230A/3.07V (local 233A/3.25V). 

IG @ 1.06e-6 Torr. 

The heater will be ramped down at ~17:00 at 2A/min.

 Tuesday, September 17, 2013, 17:36

Target temp: T1 = 805C, T2=797.6C

IG @ 9.4e-7 Torr.

Cooling down initiated. 

 Wednesday, September 18, 2013, 11:34

TGHT at 0A.  Temp at 22C. 

IG @ 5.8e-7 Torr.

Venting chamber.

John Wong wrote:

Tuesday, September 17, 2013, 11:14 Target boat contains 5 Nb discs.  3 discs are wraps with 0.001" thin of Nb foil (99.8% pure), and 2 are wraps with 0.001" Ta foil (see attachment#1) Chamber has been pumped down over night.  Pressure is currently at 9.8e-7 Torr.  Heating instructions: Samples will be heated up to 800C.  TGHT will be ramped up accordingly. (Two thermocouples are wielded on the target container.) Once at the desired temperature; the samples will be heat for 4 hours before cooling down.  Tuesday, September 17, 2013, 14:37 Target temperature has reached to 800C at around 13:00 (see attachment#2) TGHT @ 230A/3.07V (local 233A/3.25V).  IG @ 1.06e-6 Torr.  The heater will be ramped down at ~17:00 at 2A/min.  Tuesday, September 17, 2013, 17:36 Target temp: T1 = 805C, T2=797.6C IG @ 9.4e-7 Torr. Cooling down initiated.   Wednesday, September 18, 2013, 11:34 TGHT at 0A.  Temp at 22C.  IG @ 5.8e-7 Torr. Venting chamber.

 Thursday, September 19, 2013, 11:41

Target boat contains batch#2 Nb samples (see attachment #1)

Chamber has been pumped down over night.  

IG @ 5.5e-07 Torr. 

CG1B @ 0.033 T

CG1A @ 0.127 T

There is a leak in the backing line.  BV1 was bypassed in order to turn on the turbo pump. (Will investigate the leaks after the processes are done)  

*See attached picture to view samples

Laura Lambert wrote:

John Wong wrote: Tuesday, September 17, 2013, 11:14 Target boat contains 5 Nb discs.  3 discs are wraps with 0.001" thin of Nb foil (99.8% pure), and 2 are wraps with 0.001" Ta foil (see attachment#1) Chamber has been pumped down over night.  Pressure is currently at 9.8e-7 Torr.  Heating instructions: Samples will be heated up to 800C.  TGHT will be ramped up accordingly. (Two thermocouples are wielded on the target container.) Once at the desired temperature; the samples will be heat for 4 hours before cooling down.  Tuesday, September 17, 2013, 14:37 Target temperature has reached to 800C at around 13:00 (see attachment#2) TGHT @ 230A/3.07V (local 233A/3.25V).  IG @ 1.06e-6 Torr.  The heater will be ramped down at ~17:00 at 2A/min.  Tuesday, September 17, 2013, 17:36 Target temp: T1 = 805C, T2=797.6C IG @ 9.4e-7 Torr. Cooling down initiated.   Wednesday, September 18, 2013, 11:34 TGHT at 0A.  Temp at 22C.  IG @ 5.8e-7 Torr. Venting chamber.    Thursday, September 19, 2013, 11:41 Target boat contains batch#2 Nb samples (see attachment #1) Chamber has been pumped down over night.   IG @ 5.5e-07 Torr.  CG1B @ 0.033 T CG1A @ 0.127 T There is a leak in the backing line.  BV1 was bypassed in order to turn on the turbo pump. (Will investigate the leaks after the processes are done)   *See attached picture to view samples

Thursday, September 19, 2013, 17:01  

TGHT reached to 800A.  Temp at 795.9C for 4 hours.  Vac at 5.8e-7 Torr.

Cooling down initiated.  ramping rate at 2A/min. 

John Wong wrote:

Tuesday, September 17, 2013, 11:14 Target boat contains 5 Nb discs.  3 discs are wraps with 0.001" thin of Nb foil (99.8% pure), and 2 are wraps with 0.001" Ta foil (see attachment#1) Chamber has been pumped down over night.  Pressure is currently at 9.8e-7 Torr.  Heating instructions: Samples will be heated up to 800C.  TGHT will be ramped up accordingly. (Two thermocouples are wielded on the target container.) Once at the desired temperature; the samples will be heat for 4 hours before cooling down.  Tuesday, September 17, 2013, 14:37 Target temperature has reached to 800C at around 13:00 (see attachment#2) TGHT @ 230A/3.07V (local 233A/3.25V).  IG @ 1.06e-6 Torr.  The heater will be ramped down at ~17:00 at 2A/min.  Tuesday, September 17, 2013, 17:36 Target temp: T1 = 805C, T2=797.6C IG @ 9.4e-7 Torr. Cooling down initiated.   Wednesday, September 18, 2013, 11:34 TGHT at 0A.  Temp at 22C.  IG @ 5.8e-7 Torr. Venting chamber.

 Friday, September 20, 2013, 14:56

Target contains batch#3 sample wrapped with Nb foil. 

Chamber has been pumped down to 1.03e-6 Torr. 

Samples will be heated up to 1200C for 4 hours.  

 Friday, September 20, 2013, 16:54

TGHT at 450A, temp stabilizes at 1238C.

Will cool down at 20:30 tonight.

Friday, September 20, 2013, 20:40  

Samples has been heated for 4 hours at 1235C.  

Cooling down initiated. 

 Monday, September 23, 2013, 14:40

Chamber was vented.

Batch#3 process completed.

John Wong wrote:

John Wong wrote: Tuesday, September 17, 2013, 11:14 Target boat contains 5 Nb discs.  3 discs are wraps with 0.001" thin of Nb foil (99.8% pure), and 2 are wraps with 0.001" Ta foil (see attachment#1) Chamber has been pumped down over night.  Pressure is currently at 9.8e-7 Torr.  Heating instructions: Samples will be heated up to 800C.  TGHT will be ramped up accordingly. (Two thermocouples are wielded on the target container.) Once at the desired temperature; the samples will be heat for 4 hours before cooling down.  Tuesday, September 17, 2013, 14:37 Target temperature has reached to 800C at around 13:00 (see attachment#2) TGHT @ 230A/3.07V (local 233A/3.25V).  IG @ 1.06e-6 Torr.  The heater will be ramped down at ~17:00 at 2A/min.  Tuesday, September 17, 2013, 17:36 Target temp: T1 = 805C, T2=797.6C IG @ 9.4e-7 Torr. Cooling down initiated.   Wednesday, September 18, 2013, 11:34 TGHT at 0A.  Temp at 22C.  IG @ 5.8e-7 Torr. Venting chamber.    Friday, September 20, 2013, 14:56 Target contains batch#3 sample wrapped with Nb foil.  Chamber has been pumped down to 1.03e-6 Torr.  Samples will be heated up to 1200C for 4 hours.    Friday, September 20, 2013, 16:54 TGHT at 450A, temp stabilizes at 1238C. Will cool down at 20:30 tonight. Friday, September 20, 2013, 20:40   Samples has been heated for 4 hours at 1235C.   Cooling down initiated.   Monday, September 23, 2013, 14:40 Chamber was vented. Batch#3 process completed.

 Monday, September 23, 2013, 16:14

Batch#4.  Target container contains 2 Nb stables (a bullet type and a disc).  

Samples are wrapped with "dimpled" Nb foil to prevent diffusion bonding. 

Chamber has been pumped down to 8.3e-7 Torr, CG1B @ 30mT, CG1A @ 118mT. 

Samples will be heated up to 1400C for 4 hours. 

Monday, September 23, 2013, 17:46

TGHT at 620A. Temp at 1400C. Current pressure @ 2.5e-6 Torr. 

Tuesday, September 24, 2013, 16:45

Sample#4 was heated up to 1400C and after about 3hrs, the target container started to break.

See the link below for more details:

https://www.dropbox.com/s/9mhpkz66u6yqldm/Nb_1400C.mp4

 Tests were performed with external power supply. No target boat or container.

Small power on heating small heating elements on parasitic target attached on isac heatshield with water cooling on. 

Thursday, June 09, 2022, 11:25

Total number of foils: 14 electrospun fiber pellets 

Total weight = 208.3 g

container has 3 Ta heat shields.

Desired temperature at 1800 C

Omega slope set at 0.990 

Good vac = 3.0e-5 Torr,

Bad vac = 5.0e-5 Torr.

Pumping down in progress

 Thursday, June 09, 2022, 11:25

chamber pumped down below 5e-5

initiate auto ramping, 1A/min ----> 100 A

 (see eLog 581)

Flora Wu wrote:

Thursday, June 09, 2022, 11:25 Total number of foils: 14 electrospun fiber pellets  Total weight = 208.3 g container has 3 Ta heat shields. Desired temperature at 1800 C Omega slope set at 0.990  Good vac = 3.0e-5 Torr, Bad vac = 5.0e-5 Torr. Pumping down in progress  Thursday, June 09, 2022, 11:25 chamber pumped down below 5e-5 initiate auto ramping, 1A/min ----> 100 A

 Thursday, June 09, 2022, 19:16

Pressure came down below 10e-5 Torr as TGHT ramped up to 100A.

Continue auto ramping to reach 250A at 1A/min.

 Thursday, June 09, 2022, 22:52

TGHT is hovering around 127A/1.68 V due to erractic pressure, see attachment #1..  Notice the backing line is at atm pressure - I don't recall this happened in the past. 

Temp is still low to be detected on Omega.  Will leave this overnight.

 Friday, June 10, 2022, 09:07

TGHT has been holding at 250A/3.76V since 2:45am.  Pressure comes down as THGT above 200 A.  Backing line is back down normal.

Temp reading at 1040 C. 

see attachment #2.

Continue to ramp up to 300A, monitoring temp/pressure.

 Friday, June 10, 2022, 10:31

TGHT reached to 300A/4.63V, temp at 1145C.  Pressure at 1.8e-6 and coming down. 

Continue to ramp up to 350A.

 Friday, June 10, 2022, 11:59

TGHT at 350A/5.66V, temp at 1300 C, Pressure at 8.1e-7 Torr, and coming down.

Continue to ramp up to 400A.

Friday, June 10, 2022, 13:19

TGHT reached to 400A/6.73V.  Pressure coming down from 1.04e-6 Torr. 

Temp at 1690.  Will set up manually to reach 1800 C. 

 Friday, June 10, 2022, 13:50

TGHT stepped up to 432A/7.42V.  Pressure coming down from 1.3 e-6 Torr. 

Temp at 1800 C.  See attachment#3 and #4 for the screenshot and temp-current plot.

Dumped striptool data to /usr1/evpr/carbonize_pan10_elog581_a and b.

Will keep at this setting over the weekend, and cooling down will take place on Sunday evening. 

 Sunday, June 12, 2022, 22:30

TGHT has been holding at 432A/7.40V since Friday.  Temperature has gone up slightly to 1825. 

See attachment#5 for the overall process. 

Initiated cooling down at -2A/min.

Chamber will be vented on Monday morning.

Saturday, April 28, 2018, 16:09

Container is coated with TaC and wrapped with TaC heatshield. 

Will be used for carbonizing nanoSiC target materials.

Chamber is pumping down...

Sintering temp 1800C, est TGHT ~550A

 Saturday, April 28, 2018, 18:08

Pressure at 5.e-6 Torr. 

Initial auto-ramp at 1.0A/min reaching TGHT 500A.  Monitoring temp.

 Sunday, April 29, 2018, 23:37

Target temp stabilizes at 1800C with TGHT holding at 400A/7.02V for 24 hours.  Pressure at 4.4 e-7 Torr.

Lower TGHT to 338A/5.51V to reach 1600C - This will temp/current will be used for carbonizing the nanoSiC fibers.

Holding TGHT overnight to determine temp stability.

 Monday, April 30, 2018, 18:04

Temp is holding at 1600C, TGHT 338A/5.5V.  Pressure at 3.0 e-7 Torr. 

Initiated cooling down at 2A/min.

Tuesday, May 08, 2018, 15:02

22 np-SiC fibrous discs loaded in the tube container (coated and sintered with TaC)

Heat treatment is similar to previous process, see elog #408. 

TGHT should be set at 330A/5.2V to reach temp 1575C (+/- 25).

Omega slope set at 1.05 (for carbide)

Chamber is currently being pumped down

 Tuesday, May 08, 2018, 22:46

Pressure at 2.2e-6 Torr.

Initiated autoramping at 0.2A/min to reach 330A

 Friday, May 11, 2018, 11:11

TGHT reached to 330A/5.1V but temp was measured at 1400A; It was held at that current for about 10 hours.

Increased TGHT to 335A/5.2V - temp is holding at 1420C (Will check the window if there is any coating that might have caused the discrepancy)

 Sunday, May 13, 2018, 00:25

In fact, the window is slightly coated.  The temperature should already be at optimum, 1600C.  Will keep heating for another day.

 Sunday, May 13, 2018, 14:10

Temp holding up well.. Pressure at 1.8e-7 torr. 

cooling down at 2A/min.

 Monday, May 14, 2018, 09:33

Target has been cooled for over 18 hours.  Pressure at 1.1e-7 Torr.

Venting chamber.

mass loss = (8.65 - 4.32)g = 4.33 g (50%) [slightly higher than expected, likely due to increase of 5A on TGHT]

Tuesday, May 01, 2018, 18:06

21 fibrous discs of nanoSiC are loaded into a tube container (coated/Sintered with TaC). 

Thermal treatment temperature at 1600C, TGHT is ~338A/5.5V, according to elog #407.

 Wednesday, May 02, 2018, 08:27

20 mins ago... initiate auto ramping at 0.2A to reach TGHT 250A.  Instead of ramping incrementally, TGHT jumped straight to 250A; vacuum shot up to milli torr.

Turn off TGHT immediately to let vacuum stable down to 10-6 Torr. 

System problem??  Archive striptool for more details. 

Re-activate auto-ramping - OK!

Once TGHT reached 250A (18 hours later from now), will continue ramping up to reach 1600C

 Friday, May 04, 2018, 01:09

TGHT just reach 250A, temp at about 1190C.  Pressure remained high at 4.2e-5 Torr. 

Continue autoramping to reach TGHT 300A.

 Friday, May 04, 2018, 11:07

TGHT at 300A for about 1.5 hr.  Temp at 1315C.  Pressure at 5.7e-6 Torr.

Autoramp to 320A.

 Friday, May 04, 2018, 14:39

Tapping up to 330A; temp at 1560C with slope changed to 1.05 (for carbide material). Will keep at this current/temp.

 Sunday, May 06, 2018, 13:25

TGHT at 330A/5.2V; holding temp at 1550C.  No coating on windows.  Pressure at 1.6e-7 Torr.

Cooling down at 2A/min. 

 Monday, May 07, 2018, 10:49

Evap cooled.  Venting chamber. 

Inspection of the discs next...

mass loss = 6.79 - 3.62 = 3.1 g (46%) [in agreement, good]

Tuesday, July 03, 2018, 17:02

49 discs/ 15.42g np-SiC fibrous discs loaded into the tube container

Heat treatment is similar to previous process, see elog#408/409.

TGHt should be set at 330A/5.2V to reach temp 1575C (+/- 25C)

Omega slope set at 1.05 (for carbide)

Chamber is currently being pumped down

 Wednesday, July 04, 2018, 10:38

Pressure at 1.5 e-6 Torr.

Initiated auto-ramping at 0.2A/min to reach 330A/5.2V.

 Monday, July 09, 2018, 14:44

TGHT has been stabilized at 330A/5.2V for 24 hours.  Pressure at 3.7e-7 Torr.

Temp was measured at 1400C - light coating on window likely affected the measurements.

Measured with one-color pyrometer on Ta body inside the target container = 1550 C (with the correction of 250C for Ta). 

Adjusted OMEGA slope to 1.18, temp currently at 1580 C.

 Monday, July 09, 2018, 16:42

Pressure stabilized at 3.5e-7 Torr. 

Initiated auto-cooling at 1A/min.

 Tuesday, July 10, 2018, 11:11

Target is at room temperature. 

Process completed; see attachment for the data retrieval and dropbox (np-SiC production folder) for screen capture.

mass loss = (15.42 - 8.09) g = 7..33 g (47.5%) [in agreement - good!]

 Tuesday, February 28, 2012, 10:36

Two thermocouples were inserted through the left side of the copper heat shield, see attachment #1.  One thermocouple is attached to the target tube with a Ta-wire, and the other is attached to the back block.

Data gathering: 

1.  Target heater (IEVAP2:TGHT) setpoint current/voltage  

2.  Target heater (IEVAP2:TGHT) readback current/voltage

4.  Tube heater (IEVAP2:TBHT) setpoint current/voltage

3.  Thermocouples voltages & controls' readback (IEVAP2:TCM) 

 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.