Friday, June 13, 2014, 14:57, Laura Lambert, Ta, 40282-2, LP-SIS, In progress, Conditioning Ta#43 target
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Friday, June 13, 2014, 14:53
Container is filled with 400 discs of Ta foils; target length = 5.2cm;
Total mass ( Ta foils + wire) = 45.92g
No Ta foil heat shield.
No caps inserted.
Chamber pumped down this morning.
HS cooling water valves opened, no leaks detected.
IG @ 5.8e-6 Torr.
TGHT max = 580A
TBHT max = 230A
Ramping rate 0.2A/min.
Monday, June 16, 2014, 11:46
TGHT and TBHT reached their respective 580A and 230A over the weekend.
IGP1 currently at 3.2e-7 Torr.
Internal temp [measured using mikron, right side of EVAP2, pointed at discs inside] = 1375C
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Monday, June 16, 2014, 17:42, John Wong, Ta, 40282-2, LP-SIS, In progress, Conditioning Ta#43 target
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Laura Lambert wrote: |
Friday, June 13, 2014, 14:53
Container is filled with 400 discs of Ta foils.
No Ta foil heat shield.
No caps inserted.
Chamber pumped down this morning.
HS cooling water valves opened, no leaks detected.
IG @ 5.8e-6 Torr.
TGHT max = 580A
TBHT max = 230A
Ramping rate 0.2A/min.
Monday, June 16, 2014, 11:46
TGHT and TBHT reached their respective 580A and 230A over the weekend.
IGP1 currently at 3.2e-7 Torr.
Internal temp [measured using mikron, right side of EVAP2, pointed at discs inside] = 1375C
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Monday, June 16, 2014, 17:21
Further stepping up TGHT to 650A.
Temperature measured on target discs = 1542C. Vac @ 3.28e-7 Torr.
Initiate cooling down process; 2A/min for TGHT; 1A/min for TBHT
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Tuesday, June 17, 2014, 10:14, Laura Lambert, Ta, 40282-2, LP-SIS, Done, Conditioning Ta#43 target
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John Wong wrote: |
Laura Lambert wrote: |
Friday, June 13, 2014, 14:53
Container is filled with 400 discs of Ta foils.
No Ta foil heat shield.
No caps inserted.
Chamber pumped down this morning.
HS cooling water valves opened, no leaks detected.
IG @ 5.8e-6 Torr.
TGHT max = 580A
TBHT max = 230A
Ramping rate 0.2A/min.
Monday, June 16, 2014, 11:46
TGHT and TBHT reached their respective 580A and 230A over the weekend.
IGP1 currently at 3.2e-7 Torr.
Internal temp [measured using mikron, right side of EVAP2, pointed at discs inside] = 1375C
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Monday, June 16, 2014, 17:21
Further stepping up TGHT to 650A.
Temperature measured on target discs = 1542C. Vac @ 3.28e-7 Torr.
Initiate cooling down process; 2A/min for TGHT; 1A/min for TBHT
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Tuesday, June 17, 2014, 10:08
TGHT and TBHT reached 0A last night.
Turned off EVAP2
Venting chamber
Process Complete
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Wednesday, August 21, 2013, 12:30, John Wong, Ta, 38817-10, HP-SIS, Done, Conditioning Ta target
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Wednesday, August 21, 2013, 12:28
Container is filled with 400 discs of Ta foils, and wrapped with 3 layers of Ta heat shields.
No caps are inserted during the conditioning.
Chamber is currently being pumped down.
Wednesday, August 21, 2013, 15:54
HS cooling water valves opened, no leaks were detected.
IG @ 2.9e-6 Torr.
Heating setting:
TGHT max = 820A,
TBHT max = 230A
ramping rate 2A/min.
Thursday, August 22, 2013, 12:45
TGHT/TBHT reached to 820A/230A, respectively.
So much out-gassing was observed at the max currents. (see attachment#1).
TGHT/TBHT are ramping down at 4A/min.
Chamber will be vented in air.
The target will will be inspected.
More info later...
Thursday, August 22, 2013, 16:44
Target was removed from the evaporator and inspected.
The container and the Ta materials look OK.
The outgassing could be from the Ta-heat shields; they look burnt and brittle.
Overall, the target is good.
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Wednesday, August 06, 2014, 16:10, John Wong, Ta, 38817-9, HP-SIS, In progress, Conditioning Ta target
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Wednesday, August 06, 2014, 15:59
Target consists of 400 Ta discs.
Total packed length 4.5cm
Total mass 47.490g.
Re foil inserted.
Wednesday, August 06, 2014, 16:07
Chamber is currently being pumped down.
No Ta heat-shield wrapped (Want to check the temperature without it)
One end-cap inserted on left (wrt ionizer into the page).
TGHT and TBHT will be ramped up to 820A/230A at 2A/min.
Wednesday, August 06, 2014, 18:07
Vacuum at 2.3e-6 Torr. HS water valve opened. No leaks.
Initiated auto-ramping.
Thursday, August 07, 2014, 11:39
Target has been heated for 11hrs at TGHT/TBHT = 820A/230A.
Temperature measured with pyrometer:
Target leg = 1600C + (250 correction for e=0.25) = 1850C
Inside target material = dark, temp can't be measured.
Cooling down at 2A/min for TGHT and 1A/min TBHT.
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Friday, August 08, 2014, 15:16, Laura Lambert, Ta, 38817-9, HP-SIS, Done, Conditioning Ta target
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John Wong wrote: |
Wednesday, August 06, 2014, 15:59
Target consists of 400 Ta discs.
Total packed length 4.5cm
Total mass 47.490g.
Re foil inserted.
Wednesday, August 06, 2014, 16:07
Chamber is currently being pumped down.
No Ta heat-shield wrapped (Want to check the temperature without it)
One end-cap inserted on left (wrt ionizer into the page).
TGHT and TBHT will be ramped up to 820A/230A at 2A/min.
Wednesday, August 06, 2014, 18:07
Vacuum at 2.3e-6 Torr. HS water valve opened. No leaks.
Initiated auto-ramping.
Thursday, August 07, 2014, 11:39
Target has been heated for 11hrs at TGHT/TBHT = 820A/230A.
Temperature measured with pyrometer:
Target leg = 1600C + (250 correction for e=0.25) = 1850C
Inside target material = dark, temp can't be measured.
Cooling down at 2A/min for TGHT and 1A/min TBHT.
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Friday, August 08, 2014, 15:14
Vented in air and opened up up this morning.
Endcaps inserted and expanded.
Rh foil and salts added.
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Monday, March 09, 2015, 16:50, Laura Lambert, Ta, 38817-5, HP-SIS, In progress, Conditioning Ta target 
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Monday, March 09, 2015, 16:47
Target consists of 400 discs.
Total packed length 3.4cm
Total mass 45.8181g
Re foil inserted.
Chamber is currently being pumped down.
No Ta-heat shield wrapped.
One end-cap inserted on left (wrt ionizer into the page)
TGHT and TBHT will be ramped up to 820A/230A respectively at 2.0A/min.
Tuesday, March 10, 2015, 10:28
HS water valves opened, no leaks detected.
IGP1 = 4.5e-7 Torr.
Power supply not responding to epics...AGAIN. grrrr 
Tuesday, March 10, 2015, 13:17
IOC was rebooted - back up and running again! yay! 
IGP1 = 4.0e-7 Torr.
Tapped up manually to 35A, waited ~30min, vaccuum stable.
Initiating auto-ramp.
Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.
Wednesday, March 11, 2015, 09:11
Target has been at max setpoints for ~14hrs.
OMEGA = 1472C
TGHT = 820A, 12.85V
TBHT = 230A, 3.696V
IGP1 = 5.5ee-7 Torr
Manually tapping up to obtain hotter internal temperature...
Wednesday, March 11, 2015, 11:33
Current conditions:
OMEGA = 1565C
TGHT = 900A, 14.3V
TBHT = 230A, 3.7V
IGP1 = 6.3e-7 Torr
Digital pyrometer readings:
Hottest point on left leg, WRT ionizer tube into page = 2400C
Internal temp of container = 1580C
Sat at this temperature ~45min.
Initiating auto-cool at TGHT 2.0A/min, TBHT 1.0A/min
[See attached photo for collected data]
Thursday, March 12, 2015, 13:12
vented and opened up this morning.
only reached a max internal temp of 1580C.
therefore added 3xTa heat shield and will re-condition at a higher temp.
currently pumping back down.
Thursday, March 12, 2015, 14:34
IGP1 = 7.0e-7 Torr
stepped up to 35A, waited ~30min, vacuum stable.
IGP1 = 6.1e-7 Torr
Initating ramp-up...
Friday, March 13, 2015, 07:47
IGP1 = 2.9e-7 Torr
reached max set points for TGHT = 600A, TBHT = 230A
Initiating manual tap-up.
Friday, March 13, 2015, 10:31
Reached 720A, 1800C at 0850
Will continue to heat for ~3hrs
[see attachment for collected data]
Friday, March 13, 2015, 12:00
Sat at max temperature, 1800C, for 3 hours.
Initiating auto-cool at 2.0A/min for TGHT and 1.0A/min for TBHT.
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Monday, March 16, 2015, 17:38, John Wong, Ta, 38817-5, HP-SIS, Done, Conditioning Ta target
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Laura Lambert wrote: |
Monday, March 09, 2015, 16:47
Target consists of 400 discs.
Total packed length 3.4cm
Total mass 45.8181g
Re foil inserted.
Chamber is currently being pumped down.
No Ta-heat shield wrapped.
One end-cap inserted on left (wrt ionizer into the page)
TGHT and TBHT will be ramped up to 820A/230A respectively at 2.0A/min.
Tuesday, March 10, 2015, 10:28
HS water valves opened, no leaks detected.
IGP1 = 4.5e-7 Torr.
Power supply not responding to epics...AGAIN. grrrr 
Tuesday, March 10, 2015, 13:17
IOC was rebooted - back up and running again! yay! 
IGP1 = 4.0e-7 Torr.
Tapped up manually to 35A, waited ~30min, vaccuum stable.
Initiating auto-ramp.
Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.
Wednesday, March 11, 2015, 09:11
Target has been at max setpoints for ~14hrs.
OMEGA = 1472C
TGHT = 820A, 12.85V
TBHT = 230A, 3.696V
IGP1 = 5.5ee-7 Torr
Manually tapping up to obtain hotter internal temperature...
Wednesday, March 11, 2015, 11:33
Current conditions:
OMEGA = 1565C
TGHT = 900A, 14.3V
TBHT = 230A, 3.7V
IGP1 = 6.3e-7 Torr
Digital pyrometer readings:
Hottest point on left leg, WRT ionizer tube into page = 2400C
Internal temp of container = 1580C
Sat at this temperature ~45min.
Initiating auto-cool at TGHT 2.0A/min, TBHT 1.0A/min
[See attached photo for collected data]
Thursday, March 12, 2015, 13:12
vented and opened up this morning.
only reached a max internal temp of 1580C.
therefore added 3xTa heat shield and will re-condition at a higher temp.
currently pumping back down.
Thursday, March 12, 2015, 14:34
IGP1 = 7.0e-7 Torr
stepped up to 35A, waited ~30min, vacuum stable.
IGP1 = 6.1e-7 Torr
Initating ramp-up...
Friday, March 13, 2015, 07:47
IGP1 = 2.9e-7 Torr
reached max set points for TGHT = 600A, TBHT = 230A
Initiating manual tap-up.
Friday, March 13, 2015, 10:31
Reached 720A, 1800C at 0850
Will continue to heat for ~3hrs
[see attachment for collected data]
Friday, March 13, 2015, 12:00
Sat at max temperature, 1800C, for 3 hours.
Initiating auto-cool at 2.0A/min for TGHT and 1.0A/min for TBHT.
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Monday, March 16, 2015, 17:30
Target was removed from Evap#2. It was successfully conditioned.
The other end cap was inserted and expended.
Standard salts were added. And Re foil is inserted.
Target is ready for assembly.
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Friday, December 16, 2016, 14:14, Laura Lambert, Ta, 39530-3, LP-FEBIAD, Done, Conditioning Ta FEBIAD target for shutdown tests 
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Friday, December 16, 2016, 14:08
Target consists of 470 discs.
Total packed length 3.4cm [exactly 7.8cm space on both sides]
Total mass 45.9091g [Incl foils + Ta wire on 6 packs]
Target consists of 350 single discs and 6x20 packs of Ta discs
Discs in target are arranged as follows: 1pack / 75singles / 1pack / 100singles / 2packs / 100singles / 1pack / 75singles / 1pack
3x Ta Heat shields.
LP-FEBIAD container with large center block.
No endcaps inserted, no Rh foil inserted.
Chamber currently pumping down.
TBHT will be ramped up to 230A at 1.0A/min.
TGHT will be ramped up to 350A at 2.0A/min.
Final desired temperature = 1900C
Friday, December 16, 2016, 14:32
HS water valves opened, no leaks detected
Tapped up manually to 35A
Vacuum stable, IGP1 = 2.1e-6 Torr
Initiating auto-ramp.
OMEGA slope = 0.98
Monday, December 19, 2016, 11:52
Tapped up manually to ~1900C [see attached excel for details on data collected - interesting temperature fluctuations]
Will remain at max setpoints for min 4hrs then auto-cool
Monday, December 19, 2016, 15:20
Target has remained at max setpoints for just over 4hrs
TGHT = 520A, 8.67V
OMEGA = 1820C
IGP1 = 5.2e-7 Torr
Initiating auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.
Tuesday, December 20, 2016, 11:52
Vented in air and opened up this morning.
Looks like the windows was coated in evap2, unsure if this was missed and coated before conditioning target or if this is from materials coming out during conditioning process...
Target looks good.
Endcaps inserted but not expanded.
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Tuesday, August 30, 2016, 15:25, John Wong, SiC, 40860-3, LP-IG-LIS, Problems, Conditioning SiC#34. Note about the p/s voltage
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Laura Lambert wrote: |
Monday, August 08, 2016, 15:19
Previously sintered over weekend [see elog i.d 311]
Target container contains 471 discs of SiC [6 x 5 packs + 441 single discs]
Target packed length = 16cm.
Mass of 533 discs SiC(green) = 52.7172g
Container is wrapped with 3 heatshields; no end caps are inserted yet - coated spring inserted both sides to hold discs in place.
Conditioning temp = 1800C.
TGHT max = 450A. TBHT max = 230A.
Chamber is currently being pumped down.
Monday, August 08, 2016, 16:38
Target was not removed from evap2 after sintering, vented and cleaned windows only.
IGP1 = 5.5e-6 Torr
Stepped up manually to 80A, vacuum stable.
IGP1 = 3.2e-6 Torr
Initiating auto-ramp at 0.2A/min for the TGHT and 0.1A/min for the TBHT.
Thursday, August 11, 2016, 14:14
Tues the TGHT reached ~280A via auto-ramp
Evap2 was then tapped up manually to 480A/ ~1800C
Temperature readings on OMEGA have fluctuated up and down during conditioning process which was also observed for SiC#33
Also consistent with SiC#33, a lower current was required to reach 1800C during the conditioning process compared to the sintering process.
See attached link for data.
Tuesday, August 16, 2016, 16:25
TGHT remained at 480A, 9.2V for ~7 days.
IGP1 = 6.5e-6 Torr
OMEGA = 1470C [with window coating, so temperature reading compromised]
Initiating auto cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.
Wednesday, August 17, 2016, 13:40
Vented in air and opened this morning.
Target broke
Target clearly heated to high.
See attached snapshot of striptool from conditioning process.
Will update later with photos of broken container
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Tuesday, August 30, 2016, 15:17
A better look at the p/s voltage over the course of the constant heating at 480A. (see attachment).
The striptool shows the voltage was not giving a stable output. There were multiple occasions that the voltage dropped and then recovered; the obvious was on Aug 16. This indicates that the target was breaking up.
Finally on Aug 17, the voltage dropped and never recovered again - that indicates the target was broken. |
Monday, August 08, 2016, 15:22, Laura Lambert, SiC, 40860-3, LP-IG-LIS, Problems, Conditioning SiC#34 
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Monday, August 08, 2016, 15:19
Previously sintered over weekend [see elog i.d 311]
Target container contains 471 discs of SiC [6 x 5 packs + 441 single discs]
Target packed length = 16cm.
Mass of 533 discs SiC(green) = 52.7172g
Container is wrapped with 3 heatshields; no end caps are inserted yet - coated spring inserted both sides to hold discs in place.
Conditioning temp = 1800C.
TGHT max = 450A. TBHT max = 230A.
Chamber is currently being pumped down.
Monday, August 08, 2016, 16:38
Target was not removed from evap2 after sintering, vented and cleaned windows only.
IGP1 = 5.5e-6 Torr
Stepped up manually to 80A, vacuum stable.
IGP1 = 3.2e-6 Torr
Initiating auto-ramp at 0.2A/min for the TGHT and 0.1A/min for the TBHT.
Thursday, August 11, 2016, 14:14
Tues the TGHT reached ~280A via auto-ramp
Evap2 was then tapped up manually to 480A/ ~1800C
Temperature readings on OMEGA have fluctuated up and down during conditioning process which was also observed for SiC#33
Also consistent with SiC#33, a lower current was required to reach 1800C during the conditioning process compared to the sintering process.
See attached link for data.
Tuesday, August 16, 2016, 16:25
TGHT remained at 480A, 9.2V for ~7 days.
IGP1 = 6.5e-6 Torr
OMEGA = 1470C [with window coating, so temperature reading compromised]
Initiating auto cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.
Wednesday, August 17, 2016, 13:40
Vented in air and opened this morning.
Target broke
Target clearly heated to high.
See attached snapshot of striptool from conditioning process.
Will update later with photos of broken container
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Thursday, June 16, 2016, 11:01, Laura Lambert, SiC, 41369-4, HP-SIS, Done, Conditioning SiC#33 - 1st beta SiC target! 9x
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Thursday, June 16, 2016, 10:59
Previously sintered over weekend [see elog i.d 306]
Target container contains 450 discs of SiC [4 x 5 packs + 430 single discs]
Target packed length = 16cm.
Mass of 533 discs SiC(green) = 53.8758g
Container is wrapped with 3 heatshields; no end caps are inserted yet - coated spring inserted both sides to hold discs in place.
Conditioning temp = 1800C.
TGHT max = 710A according to sintering data. TBHT max = 230A.
Chamber is currently being pumped down.
Thursday, June 16, 2016, 15:43
Target was not removed from evap2 after sintering, vented and cleaned windows only.
HS water valves already open.
Stepped up manually to 70A, vacuum stable.
Initiated auto-ramp at 1.0A/min for the TGHT and 0.5A/min for the TBHT with max setpoints of 600A and 230A respectively.
TGHT = 118A, 0.9V
TBHT = 90A, 1.1V
IGP1 = 7.3e-7 Torr
Friday, June 17, 2016, 12:14
TGHT has been tapped up manually to reach max desired temperature of 1800C
TGHT = 690A, 10.85V
TBHT = 230A, 3.88V
IGP1 = 4.9e-7 Torr
This is a lower current than the current required to reach 1800C during the sintering process.
For sintering, the max current was determined via extrapolation of trendline from raw data due to interference of coating on window and unable to take reliable readings from OMEGA.
For this conditioning process ~1800C is reached on the OMEGA since the window is still ~un-coated.
Will remain at 690A, ~1800C for several days to maximize conditioning process.
See attachment for raw data.
Monday, June 20, 2016, 09:01
At the end of the day on friday 17th, OMEGA read ~1750C - no change in the current or voltage, vacuum was stable, this was the max setpoints used to reach 1800C.
This morning OMEGA = 2040C
TGHT = 690A, 10.95V
vacuum stable at IGP1 = 1.8e-7 Torr.
Slightly more noticeable coating on window port, looks like a thin ink layer, still relatively thin coating [ see attached image]
Also attached is archive from over wknd to show vacuum stable, current unchanged and voltage negligibly changed [only gone up by ~0.1V]
Friday, June 24, 2016, 13:52
Container has remained at max setpoints for 7 days.
Initiating auto-cool for TGHT @ 2.0A/min and for TBHT @ 1.0A/min.
Will vent chamber and remove from evap2 to pass off for assembly monday morning.
See attachment for updated excel on temperature readings for the conditioning process.
Monday, June 27, 2016, 08:28
vented in air and removed this morning.
target looks good!
all discs remained nicely alligned.
discs expanded outwards ~1cm, pushed back in to keep target length at 16cm
no visible yellow crystals like previous SiC targets 
endcaps inserted and expanded.
Rh foil inserted.
Ta heat shield foils removed, fins look good.
see photos attached for pictures of target - post conditioning.
coating on window very hard to remove. looked like a light sharpy pen coating on window. ended up scratching off with acetone and screw driver. couldn't remove all of it... |
Friday, June 20, 2014, 12:01, Laura Lambert, SiC, 39530-8, HP-FEBIAD, In progress, Conditioning SiC#31 target
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Friday, June 20, 2014, 11:14
Made from batch's: oct 23/2013, oct 31/2013 and june 2012
Total number of foils: 515 discs
Total mass of materials [incl graphite foils]: 64.7224g
Total length packed: 17.8cm
Container is wrapped with 3x Ta-heat shields.
Currently being pumped down.
Friday, June 20, 2014, 14:56
HS cooling water valves opened, no leaks detected.
IGP1 = 6.2e-6 Torr
TGHT max = 820A/ 17V
TBHT max = 300A/ 5V
Stepping up manually to 40A
Friday, June 20, 2014, 16:04
IGP1 = 8e-6 Torr
Slowly stepped up to 35A manually.
Vacuum has stabilized.
Initiating auto-ramp at 0.1A/min
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Friday, June 20, 2014, 16:22, John Wong, SiC, 39530-8, HP-FEBIAD, In progress, Conditioning SiC#31 target
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Laura Lambert wrote: |
Friday, June 20, 2014, 11:14
Total number of foils: 515 discs
Total mass of materials [incl graphite foils]: 64.7224g
Total length packed: 17.8cm
Container is wrapped with 3x Ta-heat shields.
Currently being pumped down.
Friday, June 20, 2014, 14:56
HS cooling water valves opened, no leaks detected.
IGP1 = 6.2e-6 Torr
TGHT max = 820A/ 17V
TBHT max = 300A/ 5V
Stepping up manually to 40A
Friday, June 20, 2014, 16:04
IGP1 = 8e-6 Torr
Slowly stepped up to 35A manually.
Vacuum has stabilized.
Initiating auto-ramp at 0.1A/min
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Friday, June 20, 2014, 16:16
Changing the heating current...
From the previous SiC targets, TGHT was ramped up to 800A and yellow crystals were found; the end caps and target legs were also found broken (see my iPad). This might be too hot for the Ta-boat to handle the sintering process.
For this process,
TGHT will ramp up to 600A and TBHT to 230A over the weekend.
Then, the temperature will be measured. The sintering temperature of SiC is ~1800 - 2000C.
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Monday, June 23, 2014, 09:47, Laura Lambert, SiC, 39530-8, HP-FEBIAD, In progress, Conditioning SiC#31 target
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John Wong wrote: |
Laura Lambert wrote: |
Friday, June 20, 2014, 11:14
Total number of foils: 515 discs
Total mass of materials [incl graphite foils]: 64.7224g
Total length packed: 17.8cm
Container is wrapped with 3x Ta-heat shields.
Currently being pumped down.
Friday, June 20, 2014, 14:56
HS cooling water valves opened, no leaks detected.
IGP1 = 6.2e-6 Torr
TGHT max = 820A/ 17V
TBHT max = 300A/ 5V
Stepping up manually to 40A
Friday, June 20, 2014, 16:04
IGP1 = 8e-6 Torr
Slowly stepped up to 35A manually.
Vacuum has stabilized.
Initiating auto-ramp at 0.1A/min
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Friday, June 20, 2014, 16:16
Changing the heating current...
From the previous SiC targets, TGHT was ramped up to 800A and yellow crystals were found; the end caps and target legs were also found broken (see my iPad). This might be too hot for the Ta-boat to handle the sintering process.
For this process,
TGHT will ramp up to 600A and TBHT to 230A over the weekend.
Then, the temperature will be measured. The sintering temperature of SiC is ~1800 - 2000C.
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Monday, June 23, 2014, 09:45
IGP1 = 5e-6 Torr
TGHT and TBHT are at ~200A
Increasing ramping rate to 0.2A/min
Monday, June 23, 2014, 11:19
IGP1 = 6.9e-6 Torr
Increasing ramping rate to 2.0A/min
Monday, June 23, 2014, 12:09
JW: Pressure went up too fast... lower the TGHT ramping up rate to 1A/min.
Tuesday, June 24, 2014, 16:06
Increasing current with respect to temperature: See attached table
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Tuesday, June 24, 2014, 23:57, John Wong, SiC, 39530-8, HP-FEBIAD, In progress, Conditioning SiC#31 target
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Laura Lambert wrote: |
John Wong wrote: |
Laura Lambert wrote: |
Friday, June 20, 2014, 11:14
Total number of foils: 515 discs
Total mass of materials [incl graphite foils]: 64.7224g
Total length packed: 17.8cm
Container is wrapped with 3x Ta-heat shields.
Currently being pumped down.
Friday, June 20, 2014, 14:56
HS cooling water valves opened, no leaks detected.
IGP1 = 6.2e-6 Torr
TGHT max = 820A/ 17V
TBHT max = 300A/ 5V
Stepping up manually to 40A
Friday, June 20, 2014, 16:04
IGP1 = 8e-6 Torr
Slowly stepped up to 35A manually.
Vacuum has stabilized.
Initiating auto-ramp at 0.1A/min
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Friday, June 20, 2014, 16:16
Changing the heating current...
From the previous SiC targets, TGHT was ramped up to 800A and yellow crystals were found; the end caps and target legs were also found broken (see my iPad). This might be too hot for the Ta-boat to handle the sintering process.
For this process,
TGHT will ramp up to 600A and TBHT to 230A over the weekend.
Then, the temperature will be measured. The sintering temperature of SiC is ~1800 - 2000C.
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Monday, June 23, 2014, 09:45
IGP1 = 5e-6 Torr
TGHT and TBHT are at ~200A
Increasing ramping rate to 0.2A/min
Monday, June 23, 2014, 11:19
IGP1 = 6.9e-6 Torr
Increasing ramping rate to 2.0A/min
Monday, June 23, 2014, 12:09
JW: Pressure went up too fast... lower the TGHT ramping up rate to 1A/min.
Tuesday, June 24, 2014, 16:06
Increasing current with respect to temperature: See attached table
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Tuesday, June 24, 2014, 23:44
Target has been heated at 600A. Local temperature measured on the right leg = 1814C.
RGA/ striptool/temperature data can be found on this link:
https://www.dropbox.com/sh/69memvh6fthodoz/AABZiSKAR9njhbqO4sBATVbla
Something interesting was observed about the out gassing of this target - the right window was coated when the temperature rose above 1500C (on the right end, could be hotter inside?) - see attachment.
I suspect this is Si vapour deposited on the window when the target heater got closed to the sintering temperature for SiC (1800 - 2000C).
Once the chamber is vented, the coated window will be inspected and analyzed. More details later...
Initiate auto-cooling (slow cool down) TGHT 1A/min; TBHT 0.5/min. Chamber should be able for venting tomorrow afternoon.
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Monday, January 11, 2016, 15:47, Laura Lambert, SiC, 41077-3, LP-SIS, Done, Conditioning SiC test target for test stand measurements   
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Monday, January 11, 2016, 15:25
Small center block LP-SIS container previously sintered with TaC coating
3x Ta heat shields
Container is loaded with 260 discs of SiC with a total length of 8.5cm
Loaded into evap2 and pumped down this morning
HS water valves opened up, no leaks detected
Tapped up manually to 30A
Vacuum stable
IGP1 = 1e-6 Torr
Initiating auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively
Final setpoints: 400A for the TGHT and 230A for the TBHT
Final desired temperature: 1700C
Tuesday, January 12, 2016, 12:55
TGHT = 138A, TBHT = 80A
IGP1 = 7.7e-6 Torr.
Vacuum stable and coming down.
Increasing ramping rate to 0.5A/min and 0.2A/min for the TGHT and TBHT respectively.
Wednesday, January 13, 2016, 09:32
TGHT reached 400A ~11.5hrs ago
TBHT reached 230A ~8hrs ago
OMEGA = 1400C
IGP1 = 1.75e-7 Torr
Tapping up manually to 1700C...
Wednesday, January 13, 2016, 10:14
Previous temperature measurement of OMEGA = 1400C is wrong due to window port being coated with SiC [see attached photos]
Will remain at TGHT = 420A for 4hrs then cool down this afternoon
Wednesday, January 13, 2016, 14:29
Remained at max setpoints for 4.5hrs.
Initiating auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.
Thursday, January 14, 2016, 09:47
Vented in air and opened up this morning
Target looks good
Will insert and expand endcaps this afternoon
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Wednesday, October 21, 2020, 14:39, Aaron Schmidt, Nb, 44508-2, LP-SIS, In progress, Conditioning Nb#9
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Nb#9 LP-SIS target description:
Total Ta foils = 470 [6x20 packs + 350 single discs]
Foil Thickness = 0.025mm
Target density = 7.24 g/cm3
Target length = 3.5 cm
Total Mass = 25.343 g [Incl foils + Ta wire on 6 packs]
Total mass w/ Target oven= 425 g (w/ end caps)
Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack
End caps installed (not yet expanded). No Ta foil heat shield added.
Final desired temperature = 1900C.
OMEGA slope = 0.98.
Wednesday, October 21, 2020, 14:09: Roughing.
Wednesday, October 21, 2020, 14:32: Turbo pump on.
Wednesday, October 21, 2020, 15:29: Waterlines opened. Vacuum ok @ 1.05E-05T.
Wednesday, October 21, 2020, 15:30: TGHT / TBHT PS on. Slope Set.
Wednesday, October 21, 2020, 19:06: Auto-ramping TGHT / TBHT to 300 / 100 @ 1 A per min. Vacuum @ 1.85e-06T.
Thursday, October 22, 2020, 07:26: Auto-ramping TGHT / TBHT to 500 / 200 @ 2 A per min. Vacuum @ 7.61e-07T.
Thursday, October 22, 2020, 11:28: Auto-ramping TGHT / TBHT to 580 / 230 @ 2 A per min. Vacuum @ 1.53e-06T. The Omega IR2C is back. Temp @ 1576 deg C.
Thursday, October 22, 2020, 12:22: Auto-ramping TGHT to 625 A @ 2 A per min. Vacuum @ 2.47e-06T. Temp @ 1734 C.
Thursday, October 22, 2020, 12:48: Auto-ramping TGHT to 645 A @ 2 A per min. Vacuum @ 3.11e-06T. Temp @ 1815 C.
Thursday, October 22, 2020, 13:10: Auto-ramping TGHT to 660 A @ 2 A per min. Vacuum @ 3.39e-06T. Temp @ 1851 C.
Thursday, October 22, 2020, 13:25: Manually tap up TGHT until 1900 C. Vacuum @ 3.53e-06T.
Thursday, October 22, 2020, 13:30: TGHT @ 673 A. Temp @ 1903 C. Vacuum @ 3.79e-06T.
Thursday, October 22, 2020, 14:00: Auto-cooling @ 1 A per min.
Friday, October 23, 2020, 07:50: PS off. Turbo pump off. Purge waterline.
Friday, October 23, 2020, 09:02: Venting. |
Thursday, August 24, 2023, 14:18, Aaron Schmidt, Nb, 45447-9, LP-IG-LIS, In progress, Conditioning Nb#11
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Nb#11 LP-IG-LIS target description:
Total Ta foils = 470 [6x20 packs + 350 single discs]
Foil Thickness = 0.025mm (0.001")
Target density = 7.13 g/cm3
Target length = 3.53 cm
Total Mass = 25.165 g [Incl foils + Ta wire on 6 packs]
Total mass w/ Target oven= 434 g (w/ end caps)
Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack
Dimpling direction on foils/ Packs. --> Center <--
End caps installed (Not expanded). No Ta foil heat shield added
Final desired temperature = 1900C.
Replacement for Nb#10
Thursday, August 24, 2023, 14:16: Roughing.
OMEGA slope = 0.98.
Thursday, August 24, 2023, 14:31: Turbo pump started.
Thursday, August 24, 2023, 14:41: TGHT / TBHT PS on. Manually test @ 5 / 5 A. ok. Tap back to 0 A.
Thursday, August 24, 2023, 18:26: Vacuum @ 4.35e-06T. Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per minute.
Thursday, August 24, 2023, 22:00: TGHT / TBHT @ 414 / 230 A (406 / 233 A - Offset). Auto-ramping TGHT to 580 A @ 2 A per min continued. Temperature @ 1353 C. Vacuum @ 4.03e-06T.
Thursday, August 24, 2023, 23:29: TGHT / TBHT @ 580 / 230 A (569 / 233 A). Auto-ramping TGHT to 610 A @ 2 A per min (approx 600 A w/ offset). Temperature @ 1708 C. Vacuum @ 6.61e-06T.

Thursday, August 24, 2023, 23:49: TGHT / TBHT @ 610 / 230 A (598 / 233 A). Auto-ramping TGHT to 630 A @ 2 A per min (620 A w/ offset). Temperature @ 1765 C. Vacuum @ 7.22e-06T.
Friday, August 25, 2023, 00:04: TGHT / TBHT @ 630 / 230 A (618 / 233 A). Auto-ramping TGHT to 650 A @ 2 A per min (640 A w/ offset). Temperature @ 1808 C. Vacuum @ 7.54e-06T.
Friday, August 25, 2023, 00:16: TGHT / TBHT @ 650 / 230 A (638 / 233 A). Auto-ramping TGHT to 670 A @ 2 A per min (660 A w/ offset). Temperature @ 1845 C. Vacuum @ 7.72e-06T.
Friday, August 25, 2023, 00:27: TGHT / TBHT @ 670 / 230 A (657 / 233 A). Auto-ramping TGHT to 680 A @ 2 A per min (668 A w/ offset). Temperature @ 1880 C. Vacuum @ 8.46e-06T.
Manually tap up to temperature.
Friday, August 25, 2023, 00:34: TGHT / TBHT @ 682 / 230 A (669 / 233 A). Temperature @ 1900-1901 C. Vacuum @ 8.59e-06T. Desired Temperature Reached.

Friday, August 25, 2023, 00:37: Auto-cooling @ 2 A per min.
Friday, August 25, 2023, 06:15:
Friday, August 25, 2023, 07:40: PS & TP off.
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Wednesday, June 21, 2023, 10:37, Aaron Schmidt, Nb, 45447-7, LP-IG-LIS, In progress, Conditioning Nb#10
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Nb#10 LP-IG-LIS target description:
Total Ta foils = 470 [6x20 packs + 350 single discs]
Foil Thickness = 0.025mm (0.001")
Target density = 7.36 g/cm3
Target length = 3.5 cm
Total Mass = 25.7576 g [Incl foils + Ta wire on 6 packs]
Total mass w/ Target oven= 438 g (w/ end caps)
Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack
Dimpling direction on foils/ Packs. --> Center <--
End caps installed (Not expanded). No Ta foil heat shield added
Wednesday, June 21, 2023, 10:37: Roughing.
Wednesday, June 21, 2023, 13:39: TP1 on.
Wednesday, June 21, 2023, 13:55: TGHT / TBHT PS on. Vacuum @ 3.35e-05T
Thursday, June 22, 2023, 13:16: TGHT / TBHT Manually set to 5 / 5 A. Vacuum @ 8.17e-07T.
Final desired temperature = 1900C.
Thursday, June 22, 2023, 13:49: OMEGA slope = 0.98.
Friday, June 23, 2023, 06:24: Auto-ramping TGHT / TBHT to 580 / 230 @ 2 A per min.
Friday, June 23, 2023, 12:11: TGHT / TBHT @ 580 / 230 A (568 / 233 A). Auto-ramping TGHT to 610 A @ 2 A per min (600 A w/ offset). Temperature @ 1697 C. Vacuum @ 3.38e-06T.
Friday, June 23, 2023, 12:32: TGHT / TBHT @ 610 / 230 A (600 / 233 A). Auto-ramping TGHT to 630 A @ 2 A per min (620 A w/ offset). Temperature @ 1748 C. Vacuum @ 4.61e-06T.
Friday, June 23, 2023, 12:44: TGHT / TBHT @ 630 / 230 A (617 / 233 A). Auto-ramping TGHT to 650 A @ 2 A per min (640 A w/ offset). Temperature @ 1790 C. Vacuum @ 5.74e-06T.
Friday, June 23, 2023, 13:07: TGHT / TBHT @ 650 / 230 A (638 / 233 A). Auto-ramping TGHT to 670 A @ 2 A per min (660 A w/ offset). Temperature @ 1825 C. Vacuum @ 5.90e-06T.
Friday, June 23, 2023, 13:22: TGHT / TBHT @ 670 / 230 A (658 / 233 A). Auto-ramping TGHT to 680 A @ 2 A per min (668 A w/ offset). Temperature @ 1858 C. Vacuum @ 6.75e-06T.
Friday, June 23, 2023, 13:29: TGHT / TBHT @ 680 / 230 A (667 / 233 A). Auto-ramping TGHT to 690 A @ 2 A per min (677 A w/ offset). Temperature @ 1877 C. Vacuum @ 6.99e-06T.
Friday, June 23, 2023, 13:37: Manually tap up to temperature.
Friday, June 23, 2023, 13:38: Vacuum @ 7.54e-06T. TGHT / TBHT @ 694 / 230 A (680.5 / 233 A direct w/ offset). Temperature @ 1901-1902 C. Desired Temperature Reached.

Friday, June 23, 2023, 13:42: Auto-cooling @ 2 A per min. |
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