ELOG Evaporator

Turns out SiC HP-FEBIAD that has finished conditioning is loaded in the wrong container and it should be a SiC HP-FEBIAD cold transfer line...so rush on new target.

Container coated with TaC using new method: Ends taped off, with liquid poured in and swirled around entire container, then poured back out - 'flushing technique'

Container is wrapped with 1x heatshield around each side of cooling fins, not incl center block.

Loaded into EVAP2 and currently pumping down.

Thursday, May 11, 2017, 13:40

IGP1 = 1.85e-6 Torr.

HS water valves opened.

No leaks detected.

Tapped up manually to 35A.

Vacuum stable.

IGP1 = 3.2e-6 Torr

IGP2 = 4.2e-6 Torr

Initiated auto ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively.

Final setpoints for TGHT = 450A and TBHT = 230A, with final desired temp of 1900C

OMEGA slope = 0.98

Friday, May 12, 2017, 07:57

IGP1 = 4.3e-7 Torr.

IGP2 = 4.4e-7 Torr

TGHT = 233A, 2.8V

TBHT = 130A, 1.6V

Increasing ramping rate to 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

Friday, May 12, 2017, 08:54

Comparing direct readouts with epics:

IGP1: direct = 1.9e-6 Torr; epics = 1.3e-6 Torr

IGP2: direct = 1.55e-6 Torr; epics = 1.4e-6 Torr

TGHT: direct = 320A, 4.38V; epics = 321A, 4.19V

TBHT: direct = 181A, 2.40V; epics = 178A, 2.34V

Friday, May 12, 2017, 10:28

IGP1 = 1.07e-6 Torr

IGP2 = 1.15e-6 Torr

TGHT = 450A, 6.37V

TBHT = 230A, 3.21V

OMEGA = 1197C

Increasing max setpoint of TGHT = 700A

Friday, May 12, 2017, 13:06

IGP1 = 2.4e-6 Torr

IGP2 = 2.5e-6 Torr

TGHT = 696A, 11.21V

TBHT = 233A, 3.26V

OMEGA = 1758C

Increasing max setpoint of TGHT = 800A

Friday, May 12, 2017, 13:32

TGHT maxed out at 715A but continued ramping.

This was noticed when current set of TGHT = 750A but readout = 715A

This is due to max voltage limit = 12.0V and readout =11.58V

Increasing TGHT max setpoint to 14.0V and restarting auto ramp from 714A

Friday, May 12, 2017, 14:45

Container has reached max setpoint of ~1900C

TGHT setpoint = 775A

TGHT = 769A, 12.54V

TBHT = 233A, 3.28V

IGP1 = 2.94e-6 Torr

IGP2 = 2.99e-6 Torr

OMEGA = 1912C

Will remain at max setpoint over weekend.

See attached photos of temperature measurements using MIKRON while TGHT current set point = 770A.

Photos are not super accurate but good as a rough idea.

Ex. for left side the point in the camera is actually pointed slightly closer to the end of the container but in the photo it looks more centered.

Saturday, May 13, 2017, 10:52 by Anders

Ramping down heaters. Temp 1912 C. Vacuum IGP1 = 5.4e-7 Torr

Monday, May 15, 2017, 13:10

Vented in air and taken out this a.m.

Target container looks good.

Fully sintered coating.

Attachment 1: LS_during_TaC_sintering.jpg

Attachment 2: RS_during_TaC_sintering.jpg

371

Tuesday, May 16, 2017, 11:57

Tuesday, May 16, 2017, 10:56

Target container contains 460 discs of SiC

Target packed length = 17cm.

Mass of SiC(green) = 55.5152g

Consists of 4 packs of 5 and 440 singles.

Container is wrapped with 1x heatshield around each side of cooling fins; no end caps are inserted yet - coated spring inserted both sides to hold discs in place.

Sintering temp = 1800C

Chamber is currently being pumped down.

Tuesday, May 16, 2017, 15:27

HS water valves turned on, no leaks detected.

Tapped up manually to 30A

Waited ~30min , vacuum stable.

IGP1 = 8.25e-6 Torr

Initiating auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively.

TGHT max = 400A. TBHT max at 230A.

Slope on OMEGA = 1.09 [see elog i.d. # 370 for reasoning behind OMEGA slope choice]

Friday, May 19, 2017, 10:13

TGHT = 250A, 3.11V DR = 248A, 3.3V

TBHT = 137A, 1.68V DR = 140A, 1.73V

OMEGA = 1100C

IGP1= 6.9e-6 Torr DR = 1e-5mbar

IGP2 = 5.9e-6 Torr DR = 6.45e-6 Torr

Vacuum stable.

Increasing ramping rate to 1.0A/min and 0.5A/min for the TGHT and TBHT respectively.

Friday, May 19, 2017, 10:33

Change in plan and switching ramping rate to 0.5A/min and 0.2A/min for the TBHT and TGHT respectively.

Friday, May 19, 2017, 14:49

TGHT = 400A, 5.46

TBHT = 200A, 2.66

IGP1 = 2.7e-5 Torr

IGP2 = 2.2e-5 Torr

OMEGA = 1200C

Increasing max setpoint for TGHT to 550A

Decreasing ramping rate to 0.2A/min and 0.1A/min for over the weekend.

Tuesday, May 23, 2017, 09:23

TGHT = 550A, 8.37

TBHT = 230A, 3.14

IGP1 = 1.6e-7 Torr

IGP2 = 1.6e-7 Torr

OMEGA = 1570C

Increasing max setpoint for TGHT to 600A at rate to 0.5A/min

Tuesday, May 23, 2017, 11:45

TGHT = 600A, 9.36

IGP1 = 3.5e-7 Torr

IGP2 = 3.8e-7 Torr

OMEGA = 1675C

Increasing max setpoint for TGHT to 625A at rate to 0.5A/min

Tuesday, May 23, 2017, 13:03

TGHT = 625A, 9.80V

IGP1 = 5.2e-7 Torr

IGP2 = 5.7e-7 Torr

OMEGA = 1715C

OMEGA no longer valid around 640A as temperature drops instantly after tapping up.

Could be due to target movement at high temperature.

No obvious window coating.

Tapped up manually to 660A, 10.49V.

Will remain at max setpoint overnight.

Wednesday, May 24, 2017, 11:13

TGHT = 660A, 10.74V

TGHT power supply = 662A, 11.00V

TBHT = 230A, 3.16V

TBHT power supply = 232A, 3.25V

IGP1 = 4.2e-7 Torr

IGP1 direct readout = 5.9e-7 mbar

IGP2 = 4.6e-8 Torr

IGP2 direct readout = 5e-7 Torr

Evap2 reached max setpoint yesterday afternoon.

Window has thiny coating - see attached photo.

OMEGA = 1800

MIKRON = ~1800

Initiating auto cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

Wednesday, May 24, 2017, 11:36

Change of plan.

TGHT = 620A, TBHT = 210A

Ramping back-up to max setpoints and will remain at those points until vacuum starts to decrease more.

Friday, May 26, 2017, 15:24

IGP1 = 2.1e-7 Torr

IGP2 = 2.2e-7 Torr

TGHT = 660A, 10.72V

TBHT = 230A, 3.21V

All windows coated.

Remained at max setpoints for ~3.5days.

Conditioning process complete.

Initiating auto-cool at 2A/min and 1A/min for the TGHT and TBHT respectively.

Tuesday, May 30, 2017, 14:41

Target vented in air and removed from evap2

Looks good!

Endcaps inserted and expanded.

See photos attached.

Attachment 1: window_at_max_setpoint_after_1_day.jpg

Attachment 2: 20170530_094047_Richtone(HDR).jpg

Attachment 3: 20170530_094118_Richtone(HDR).jpg

Attachment 4: 20170530_094137_Richtone(HDR).jpg

410

Wednesday, May 23, 2018, 15:21

Sintering TaC coating container for UCx#23

Wednesday, May 16, 2018, 09:56

Container coated with TaC using 'flushing technique' and let dry over weekend.

Cleaned ionizer tube with acetone, no coating inside ionizer tube.

Wrapped with 3 x Ta heat shields, not incl center block

OMEGA slope = 0.98

*NOTE: realized after pumping down, filament on IGP2 is burnt out and needs replacing, will order a new one and use IGP1 for this process

Thursday, May 17, 2018, 13:15

HS water valves remained open since the last time evap2 was used, no leak check done.

Tapped up manually to 50A.

Waited ~1hr

Vacuum stable.

IGP1 = 1e-6 Torr

Initiating auto ramp for TGHT @ 0.2A/min to a max setpoint of 350A

Initiating auto ramp for TBHT @ 0.1A/min to a max setpoint of 230A

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

Friday, May 18, 2018, 13:00

Tapped up manually.

TGHT = 495A, 8.84V

TBHT = 230A, 3.26V

MIKRON = 2000C

Filament = 1910C

OMEGA = 1910C

Will remain at max setpoints over weekend.

Tuesday, May 22, 2018, 10:04

Remained at max setpoints over long wknd.

TGHT = 495A, 8.85V

TBHT = 230A, 3.26V

IGP1 = 2.47e-7 Torr

Initiating auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

Wednesday, May 23, 2018, 10:08

Vented in air this morning.

Container looks good!

Transferred into glove box.

Sunday, July 22, 2012, 20:51

Sunday, July 22, 2012, 20:30

The NiO target materials were loaded into the container today.

Total discs = 500, (10 discs/pack)

length (after loaded) = 9.0cm

Target container is wrapped with Ta-heat shields, and will be removed after the sintering process.

One regular end cap is inserted (with Ni-foil inserted as a divider). The caps, however, are very loose (tried 2 caps and still loose). Hopefully the thermo diffusion bonding will seal the cap...

The other end is inserted with a D-cap for out-gassing proposes, and will be replaced with the regular end-cap after the process.

(see attachment#1)

Sunday, July 22, 2012, 20:48

The camber has been pumped down and currently IG1=1.3e-6 Torr.

The HS cooling water was turned on and no leaks were detected.

TGHT and TBHT were stepped up to 50A.

Auto-ramping is initiated at 0.2A/min for TGHT max = 250A, TBHT max = 230A.

Thursday, July 26, 2012, 23:31

TGHT and TBHT have reached to 250A (local @ 242A/2.88V) and 230A, respectively, and have stayed for ~4hrs (see attachment#2)

Currently, IGP1 = 4.9e-7 Torr, IGP2 = 3.5e-7 Torr, CG1B = 13mTorr.

Initiating auto-cool down at 2A/min.

Monday, July 30, 2012, 15:11

The chamber was vented and the target was removed.

There was significant condensation oily fluid coated Cu-heatshield lid and around the ionizer opening.

Overall, the target looks very good. The NiO target material was nicely sintered. No shrinkage or loose particles were observed (see attachment #3).

The endcap, however, was not properly fitted and it just fell off, (see attachment #4).

Both ends of the target are currently opened; the expension tool for the endcap is in order and hopefully this will solve the problem.

The target is being stored in the fumehood

Attachment 1: NiO#1_sinteringevap2.png

Attachment 2: NIO#1_TGHT_TBHT_250_220.png

Attachment 3: Sintered_NiO.GIF

Attachment 4: Endcap.GIF

Tuesday, August 14, 2012, 15:57

Testing endcaps inserted /w the new expansion tool

Tuesday, August 14, 2012, 15:44

This SiC target was prepared in May 2011 with the Evaporator#1. The target will not used for online.

Two endcaps were inserted with the new expansion tool. The target will be heated up to the normal operating condition (TGHT =580A, TBHT = 230A).

The chamber is currently being pumped down.

Tuesday, August 14, 2012, 16:21

Earlier, the Cu-heat shield was removed from the evaporator to replace the insulators, so all the seals were placed with new ones. However,

there seems to be some leaks after the HS cooling water is turned on. (see attachment#1).

The TP off, and the chamber is vented for investigation.

Tuesday, August 14, 2012, 17:25

All the 3 seals for the Cu-heat shield were replaced. The chamber has been pumped down and the HS water valve is open. No leaks are detected.

Tuesday, August 14, 2012, 17:29

Initiated auto-ramping at 2A/min for both TGHT and TBHT.

Parameter constraints: good vac @ 2.0e-5 Torr, bad vac @ 3.0e-5 Torr.

Currently, IG1 @ 6.5e-6 Torr.

Wednesday, August 15, 2012, 09:52

TGHT and TBHT have reached to 520A and 230A, respectively, and have stayed at the currents for about 10 hours. (see attachment #2)

IG is currently at 7.7e-7 Torr.

Initiating auto-cool down at 2A/min.

Thursday, August 16, 2012, 11:23

Chamber is vented.

Attachment 1: vacuum_leaks.PNG

Attachment 2: TGHT_TBHT.png

Wednesday, March 06, 2013, 10:41

Wednesday, March 06, 2013

The Cool Transfer Line (CTL) test target is installed for thermal tests. Drawing number is ITD0431 REV A.

Thermocouple channels are as follows:

T1: Cu block on CTL
T2: Heat Shield above CTL
T3: Heat Shield cooling water Supply
T4: Heat Shield cooling water Return

Cooling water is in Evap2 supplied to the cooling line that goes directly to the area on the Heat Shield above the CTL.

Test results attached.

Attachment 1: CTL_1st_Assebmly_Thermal_Test_Evap2.pdf

Attachment 2: 2013-03-08_Evap2_First_Thermal_Test.pdf

Wednesday, March 06, 2013, 17:53

Anders Mjos wrote:

Wednesday, March 06, 2013

The Cool Transfer Line (CTL) test target is installed for thermal tests. Drawing number is ITD0431 REV A.

Thermocouple channels are as follows:

T1: Cu block on CTL
T2: Heat Shield above CTL
T3: Heat Shield cooling water Supply
T4: Heat Shield cooling water Return

Cooling water is in Evap2 supplied to the cooling line that goes directly to the area on the Heat Shield above the CTL.

Wednesday, March 06, 2013, 17:23

The target has been pumping down to 5.3 e-7 Torr. On the RGA mass scan, mainly H2O (mass 18 + constituents) was detected at ~2.7pA (see attachment #1).

The target will be heated up: TGHT = 850A (rate @ 1A/min); TBHT = 300A (rate @ 1A/min).

Thursday, March 07, 2013, 11:51

TGHT and TBHT reached to 850A (local, 845A\13.80V) and 300A, respectively. The out gassing of CO (mass 28) reached to ~5pA at the max currents. (see attachment #2)

TBHT will be ramped down to 0A to compare the temperatures.

Thursday, March 07, 2013, 15:55

TBHT at 0A. See attachment#3 for the temperatures and RGA data before further ramping down the TGHT.

Attachment 1: rampingup_1.PNG

Attachment 2: rampingup_2.PNG

Attachment 3: autorampingdown_23.PNG

Monday, March 11, 2013, 12:23

Anders Mjos wrote:

Wednesday, March 06, 2013

The Cool Transfer Line (CTL) test target is installed for thermal tests. Drawing number is ITD0431 REV A.

Thermocouple channels are as follows:

T1: Cu block on CTL
T2: Heat Shield above CTL
T3: Heat Shield cooling water Supply
T4: Heat Shield cooling water Return

Cooling water is in Evap2 supplied to the cooling line that goes directly to the area on the Heat Shield above the CTL.

Monday, March 11, 2013

The CTL test target was installed again for a second thermal test. CTL block fastened to HS with 1 in lbs. A small piece of Ta-foil of 0.001" thickness was used between the CTL Cu-block and the Ta transfer line to reduce the heat transfer..

Thermocouples were re-attached to CTL and Heat Shield (see above for channels #s).

See attached graph (PDF) for details.

Attachment 1: 2013-03-11_Evap2_Second_Thermal_Test.pdf

Monday, March 11, 2013, 15:59

Anders Mjos wrote:

Anders Mjos wrote:

Wednesday, March 06, 2013

The Cool Transfer Line (CTL) test target is installed for thermal tests. Drawing number is ITD0431 REV A.

Thermocouple channels are as follows:

T1: Cu block on CTL
T2: Heat Shield above CTL
T3: Heat Shield cooling water Supply
T4: Heat Shield cooling water Return

Cooling water is in Evap2 supplied to the cooling line that goes directly to the area on the Heat Shield above the CTL.

Monday, March 11, 2013

The CTL test target was installed again for a second thermal test. CTL block fastened to HS with 1 in lbs. A small piece of Ta-foil of 0.001" thickness was used between the CTL Cu-block and the Ta transfer line to reduce the heat transfer..

Thermocouples were re-attached to CTL and Heat Shield (see above for channels #s).

Monday, March 11, 2013, 15:55

Chamber was pumped down to 2 e-7 Torr. HS water valve opened and no leaks were detected.

TGHT and TBHT are ramping up to 850A and 300A at 2A/min, respectively.

RGA is running...

Tuesday, March 12, 2013, 10:44

TGHT/TBHT reached to max currents.

See attachment #1 for temperature and RGA measurements.

Cooling down in process... 5A/min.

Attachment 1: autorampingup_110.PNG

Wednesday, March 13, 2013, 16:08

Wednesday, March 13, 2013

Thermocouple channels (see attached PDF for photos)
T1 - Left target leg at tube
T2 - Between cooling fins close to tube, left side
T3 - Supply water HS
T4 - Return water HS

Friday, March 22, 2013

Test not conducted. Target removed.

Attachment 1: HP-FEBIAD-A_TC_at_fins.pdf