 Thursday, October 17, 2019, 13:53, Darwin Ortiz Rosales, TaC, 44062-3, LP-SIS, In progress, TaC coating/sintering
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Thursday, October 17, 2019, 12:00
Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)
Desired temperature= 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).
Evap 2 was pumped down on the previous night.
Good vacuum= 3.00 e-5 Torr
Bad vacuum = 5.00 e-5 Torr
Ramped TGHT and TBHT to 40A at 0.5A/min
Initial IGP1= 7.0 e-07 Torr
Thursday, October 17, 2019, 13:53
After pressure stabilization at 40A:
Autoramp TGHT and TBHT at 1A/min to 400A and 230A respectively.
Friday, October 18, 2019, 6:20
TGHT = 400A, 6.52V, TBHT= 233A, 4.1V
OMEGA = 1733C
Start autoramp to 430A on TGHT at 1A/min
Friday, October 18, 2019, 7:05
TGHT= 431A, 7.1V
TBHT= 233A, 4.1V
IGP1= 1.13e-06 Torr
OMEGA = 1828 C
Set autoramp to 465 at 1A/min
Friday, October 18, 2019, 11:13
TGHT = 465A, 7.8V, TBHT = 233A, 4.1V
OMEGA = 1865C
(Something is different with the heat dissipation on this target. Will leave at this current and start cooling at 1200 noon to avoid container strain)
Friday, October 18, 2019, 12:00
TGHT = 462.7A, 7.8V
TBHT= 233.4A, 4.1V
OMEGA = 1863C
IPG1= 1.02e-06 Torr
Commence cooling at -2A/min for TGHT and -1A/min for TBHT
Monday, October 21, 2019, 09:11
Pump down and dismount.
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Monday, November 04, 2019, 14:25, Darwin Ortiz Rosales, Endcaps, 40282-4, TARGET BOAT, Done, 
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Monday, November 04, 2019, 14:19
Each endcap is separated with a disc of graphite foil and rolled into packs one pack of 4 and one pack of 8 within a foil envelope in a target boat.
There are also 3 coated springs interspersed.
The boat is wrapped with 3-layers of Ta heatshields.
Chamber pumped down overnight.
OMEGA slope = 0.99
Will Tap TGHT up to 40 A then autoramp to 400A at 1A/min.
Final desired temperature on OMEGA (tap)= 1800C
Tuesday, November 05, 2019, 11:30
IGP1 = 9.6e-7 Torr
Autoramp TGHT to 40A at 1A/min
Tuesday, November 05, 2019, 11:44
IGP1= 2.6e-06 Torr
TGHT = 40.8 A, 0.37V
Will leave at 40 A for 1 hour
Tuesday, November 05, 2019, 12:39
IGP1=2.5e-6 Torr
TGHT =40.0A, .33V
Start ramping TGHT to 400A at 0.1A/min
Wednesday, November 06, 2019, 09:32
IGP1=7.8e-7 Torr
TGHT = 168.4A, 2.38V
increase ramp speed to 1A/min
Wednesday, November 06, 2019, 14:07
IGP1= 2.34e-6 Torr
TGHT=400.0 A, 6.98V
set TGHT autoramp to 460A @ 1A/min aiming for 1850C (see attached plot)
Wednesday, November 06, 2019, 15:18
OMEGA = 1776 C
TGHT = 460.0A, 8.52V
IGP1= 4.7e-6 Torr
Starting manual tap up to 1810C
Wednesday, November 06, 2019, 15:36
OMEGA=1810 C
TGHT = 468.8A, 8.74V
IGP1=4.14e-6
Wednesday, November 06, 2019, 19:04
OMEGA=1822 C (has been between 1817-1824 C over 3.5 hours )
TGHT=468.8A, 8.67V
IGP1=1.9498e-06 Torr
Start TGHT ramp down at -2A/min
Thursday, November 07, 2019, 09:55
THGT = 0A, 0V overnight
IGP1= 3.2 e-07 Torr
Proceeding with unloading.
End caps looked good for online use.
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Saturday, November 23, 2019, 14:03, Darwin Ortiz Rosales, TaC, 42464-3, HP-FEBIAD, Done, TaC coating/sintering
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12.3
Saturday, November 23, 2019, 14:00
Container coated with TaC and wrapped with 3 Ta heat shields.
Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.
TBHT will be set fixed at 230 A (max).
Good vac at 3.00e -5 Torr
Bad vac at 5.00e-5 Torr
Chamber pump down was started on Friday November 22; however.
No leaks were observed when turning water lines on.
IGP1= 4.6e-07 Torr
Saturday, November 23, 2019, 15:30
autoramp at 0.5A /min up to 50A for both TGHT and TBHT and maintained for 1 hour.
Saturday, November 23, 2019, 16:15
IGP1= 1.1e-06 Torr
Auto Ramp to 450 A on THGT and 230A on TBHT at 0.5A/min
Saturday, November 23, 2019, 23:44
IGP1= 5.2e-06 Torr
TGHT = 248A, 2.9V TBHT= 233A 2.9V
Increased ramp step to 1A/min to 620 A
Sunday, November 24, 2019, 00:14
IGP1=1.9e-06 Torr
TGHT = 274.3, 3.3V TBHT= 233A, 2.9V
Sunday, November 24, 2019, 07:33
IGP1=3.2e-06 Torr
OMEGA= 1490C
TGHT = 619 A, 9.1V TBHT=233A, 2.9V
Continue ramping THGT at 1A/min to 700 A
Sunday, November 24, 2019, 10:05
IGP1= 2.1 e-05 Torr
OMEGA= 1676 C
TGHT= 700A, 10.6V TBHT= 233A, 2.0V
Start autoramp to 780A as per regression in attachment
Sunday, November 24, 2019, 13:22
Autoramp to 795A for TGHT
Sunday, November 24, 2019, 21:16
OMEGA= 1854 C
TGHT= 789.6A, 12.27V TBHT= 233.A, 2.9V
IGP1= 2.0e-05
Will allow pressure to stabilize lower.
Sunday, November 24, 2019, 22:16
TGHTT= 789.6A, 12.3V TBHT=233.3A, 2.9V
OMEGA=1855C
IGP1 = 6.9e-06Torr
Start cooling TGHT at 2A/min and TBHT at 1A/min |
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Tuesday, November 26, 2019, 15:21, Darwin Ortiz Rosales, SiC, 42464-3, HP-FEBIAD, Done, Conditioning of SiC discs (sintering) (RUSH)
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Tuesday, November 26, 2019, 14:53
Total number of foils: 504
Total length packed 17.4 cm
container has 3 Ta heat shields.
No endcaps inserted to facilitate out-gassing
Two TaC coated Ta wire springs inserted at either end.
Initially to ramp TGHT and TBHT to 50A at 1A/min
Then heat manually to OMEGA ~1400 C , ramping TGHT manually and automatically to reach 530A A (Omega slope set = 0.990)
Then temperature= (Correected to 1800C) 1900 C, Omega Slope set = 0.990, manually and automatically ramp to 700A, TGHT will be tapped up accordingly to reach desired Temp.
TBHT will be set fixed at 230 A (max). TBHT heated manually and automatically to max.
Good vac at 3.00 e -5 Torr
Bad vac at 5.00 e-5 Torr
System experienced some vacuum issues due to cooling water leak in a heatshield line.
Evaluation discs not included because no space.
Total Green disc mass measured = 58.250 g
Tuesday, November 26, 2019, 15:00
IGP1= 7.4e-06 Torr. No leak issues found after last fix (Anders will add details).
Tuesday, November 26, 2019, 15:33
TGHT= 52.7A, .22V TBHT= 49.3A, .52V
IGP1= 7.202 e-06 Torr (trending up so will allow to stabilize).
Wednesday, November 27, 2019, 06:09
left with autoramp waiting for vac to drop but no advance overnight.
Pressure did not seem to drop back below 3e-5 Torr magnitude, therefore not much advance in current ramp.
Thursday, November 28, 2019, 11:15
Continued ramping manually
OMEGA = 1429 C (0.99 slope), TGHT = 542A, 7.8V
With slope = 1.08 OMEGA = 1724 C, therefore staying at 0.99 slope
TaC coating sintering plot suggests 753A to reach 1800C (See attachment 1)
Windows a little bit coated but not enough to disturb laser.
Thursday, November 28, 2019, 12:17
TGHT =753A, 11.8V since 12:00 noon.
TBHT= 233.4A, 3.3V
OMEGA= 1735 C (0.99 slope)
Thursday, November 28, 2019, 13:01
OMEGA = 1860C (1.08 slope)
Thursday, November 28, 2019, 14:38
OMEGA temperature began to creep up to ~1880. Tapped TGHT current down to 733.5A, 11.4V
Thursday, November 28, 2019, 15:12
Checked windows and no significant additional buildup of obstructive material.
Temperature creeping up again. Tap down TGHT current to 729 A, 11.2 V
OMEGA = 1870C at slope 1.08
Thursday, November 28, 2019, 16:03
Temperature increase to 1880C
Tap down TGHT current to 715A, 10.9V
OMEGA= 1870 C (slope = 1.08)
Thursday, November 28, 2019, 16:22
Temperature creep to 1880 C
Tap down TGHT to 700A, 10.8V
OMEGA= 1845C
IGP1=2.2e-06 Torr
Thursday, November 28, 2019, 16:37
IGP1= 1.9e-06 Torr
OMEGA = 1850C (1.08 slope)
TGHT = 692A, 10.5V TBHT= 233A, 3.2V
Initiating pressure ramp at -2A/min on TGHT and -1A/min on TBHT
Thursday, November 28, 2019, 16:45
IGP1= 1.28e-06 Torr
OMEGA= 1770 C (1.08 slope)
TGHT = 650A, 9.8V
ramp TGHT at -3.5A/min maintain TBHT at -1A/m in
Thursday, November 28, 2019, 17:11
IGP1= 1.14e-06 Torr
OMEGA = 1730 C (1.08 slope)
ramp TGHT at -5A/min maintain TBHT at -1A/m
Thursday, November 28, 2019, 17:20
IGP1- 8.9e-07 Torr
OMEGA=1636C
ramp TGHT at -6A/min maintain TBHT at -1A/min
Thursday, November 28, 2019, 17:34
IGP1= 7e-07 Torr
OMEGA= 1500 C (1.08 slope)
ramp TGHT at -8A/min maintain TBHT at -1A/min
TBHT = 183A
OMEGA 1180C
TGHT =300 A
TBHT = 155A
Initiated -15A/min TGHT and -4A/min TBHT
IGP1= 5.2e-07 Torr
OMEGA below 1000C
begin manual tapdown
Thursday, November 28, 2019, 19:42
Target was dismounted after cooling. Two graphite discs and end caps inserted.
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Tuesday, March 10, 2020, 09:34, Darwin Ortiz Rosales, Empty, 42218-8, HP-SIS, Done, TaC coating/sintering
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Monday, March 9, 2020, 03:15
Container coated with TaC and wrapped with 3 Ta heat shields.
Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.
TBHT will be set fixed at 230 A (max).
Good vac at 3.00e -5 Torr
Bad vac at 5.00e-5 Torr
Chamber pump down
Tuesday, March 10, 2020, 09:17
Starting manual ramp to 50 A @ approximately 2A/min
IGP1 = 3.73e-7 Torr after opening water line pressure slowly incresed to 4.4e-7 Torr
TBHT also has Chiller interlock reached out to controls for removal.
Tuesday, March 10, 2020, 10:47
Chiller Interlock removed for TBHT. Started manual ramp to 50A @ approximately 2A/min
Tuesday, March 10, 2020, 11:15
allowing to stabilize at 50A on TGHT and TBHT
IGP1= 7.9 e=7 Torr and trending up
Tuesday, March 10, 2020, 12:09
Pressure on IGP1 spiked. Allowing to stabilize.
Tuesday, March 10, 2020, 14:36: Stopped By to check. Vacuum @ 3.02e-03T. Turbo pump appears to have tripped. Shut off Both PS. Prepare to vent. - Aaron S.
Tuesday, March 10, 2020, 14:48: Tightened all fittings (Just in case). HS side & HS waterline at the feed through. Roughing.
Tuesday, March 10, 2020, 15:06: TP1 @ 38KRPM 1.34e-04T & dropping. TGHT & TBHT PS on. Monitor before heating. -AS
Wednesday, March 11, 2020, 06:25: Vacuum @ 3.39e-07T. TGHT / TBHT PS on. - AS
Wednesday, March 11, 2020, 06:26: Manually tapped up TGHT / TBHT to 10 / 10 A. Ok.
Wednesday, March 11, 2020, 06:28: Auto-ramping TGHT / TBHT @ 4 A per min to 50 / 50 A.
Wednesday, March 11, 2020, 07:07: Vacuum @ 3.64e-07T. TGHT / TBHT @ 50 A. All appears stable. - AS
Wednesday, March 11, 2020, 07:036
Started autoramp at 2 A/min
IGP1= 3.6e-7 Torr
Wednesday, March 11, 2020, 08:06
TGHT=10 5A, 1.3 V TBHT = 105 A, 1.2 V
pressure rising fast; manual ramp down to 95A on both TGHT and TBHT
Wednesday, March 11, 2020, 09:54
IGP1= 4.7e-6 Torr; TGHT = 93.1 A, 1.2 V; TBHT = 95.1 A, 1.1 V
start autoramp at 1A/min (0.5 A/30s)
IGP1= 1.28e-5 Torr
TGHT = 108.3 A, 1.44 V
TBHT = 110 A, 1.29 V
Stop autoramp
Wednesday, March 11, 2020, 10:25
IGP1= 5.9e-5 Torr
manually tapped TGHT and TBHT set-current to 105 A respectively.
pressure dropping.
Wednesday, March 11, 2020, 11:18
IGP1=8.0e-06 Torr
manually ramp to set-current 115 A for both TGHT and TBHT at approximately 2A/ min
allow to stabilize before proceeding
Wednesday, March 11, 2020, 12:12
IGP1=7.02e-6 Torr
TGHT = 112.7 A, 1.5 V
TBHT = 114.6 A, 1.4 V
Auto-ramping at 1A/min TGHT to 430 A and TBHT top 230A
Wednesday, March 11, 2020, 18:45
IGP1= 1.2 e-06 Torr
TGHT=421.8 A, 6.2 V
TBHT = 231.9 A, 3.1 V
auto-ramp TGHT at 1A/min to set-current 530A
Wednesday, March 11, 2020, 23:08
IGP1= 1.3e-6 Torr
TGHT= 519.9 A, 7.87V
TBHT = 232.0 A, 3.1 V
start autoramp TGHT to 600A at 1A/min
Wednesday, March 11, 2020, 23:36
IGP1= 1.6e-6 Torr
TGHT = 542.9 A, 8.2V
TBHT = 232.9 A, 3.1V
Set autoramp to 750A on TGHT at 0.5 A/min
Thursday, March 12, 2020, 06:55
The Voltage set on TGHT was too low so current had not increased
IGP1= 1.5e-6 Torr
TGHT = 640 A, 10V
TBHT 232/9A, 3.1V
Oncrease TGHT voltage set to 14.5 and start autoramp at 3A/min to 750 A
Thursday, March 12, 2020, 7:43
TGHT = 735.7 A, 11.8V
OMEGA = 1595C
Auto -ramp set to 780 A for TGHT
Thursday, March 12, 2020, 7:58
OMEGA = 1655 C
TGHT set to 800 A at 3A/min
Thursday, March 12, 2020, 9:42
OMEGA = 1704 C
TGHT = 789.5 A, 13.0 V
Manual tap up to 837 A set on TGHT and 821 A readback
Thursday, March 12, 2020, 10:00
TGHT readback = 821.0 A, 13.7 V
OMEGA = 1744 C
TBHT same as previous entry.
Thursday, March 12, 2020, 10:35
Tapped up TGHT to 832.6 A, 13.8 V
OMEGA = 1759 C
TBHT = 232.9 A, 3.6 V
Will not tap further.
Thursday, March 12, 2020, 13:22
IGP1 = 5.0 e-06 Torr (stable)
TGHT = 832.7 A readback (849 A set), 13.7V
TBHT = 232.9 A, 3.6 V
OMEGA = 1758 C
Start cooling at TGHT 3A/min
Thursday, March 12, 2020, 14:08
IGP1= 1.32e-06 Torr
TGHT = 706 A, 11.0 V
TBHT = same as previous
OMEGA = 1583C
Start cooling TBHT at 1A/min continue cooling TGHT at 3A/min
Friday, March 13, 2020, 08:18
IGP1= 3.9e-8 Torr
Will unload sintered container
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Friday, March 13, 2020, 14:21, Darwin Ortiz Rosales, SiC, 42218-8 , HP-SIS, Done, Conditioning of SiC discs (sintering) (RUSH)
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Friday, March 13, 2020, 13:52
Total number of foils: 493
Total length packed 17.4 cm
container has 3 Ta heat shields.
No endcaps inserted to facilitate out-gassing
Two TaC coated Ta wire springs inserted at both ends.
Initially to ramp TGHT and TBHT to 50A at 1A/min
Then heat manually to OMEGA ~1400 C , ramping TGHT manually and automatically to reach 530A A (Omega slope set = 0.990)
Then temperature = 1800 (C using slope 1.08 at after 1700C manually and automatically ramp to 700A then TGHT will be tapped up accordingly to reach desired Temp).
TBHT will be set fixed at 230 A (max). TBHT heated manually and automatically to max.
Good vac at 3.00 e -5 Torr
Bad vac at 5.00 e-5 Torr
Evaluation discs not included because no space.
Total Green disc mass measured = 58.78 g
Friday, March 13, 2020, 14:22
Container loaded and pressuring down started without any pump issues.
Friday, March 13, 2020, 23:26
IGP1= 9.1e-07 Torr
Start auto tap at .25A/min to 50A on both TBHT and TGHT
Saturday, March 14, 2020, 07:09
IGP1=6.9e-6 Torr
TGHT = 49.1 A, 0.58V
TBHT = 49.2A, .49V
Continue ramp to 80 A on both heaters at .0.25A/min (good vacuum 3.0 e-04 Torr, bad vaccum 5.0 e-04 Torr
Saturday, March 14, 2020, 08:22
IGP1=6.8 e-05 Torr
Pressure spike TGHT =63.7 A, 0.77 V; TBHT = 60.0 A , 0.62 V
Aborted ramp alow to stabilize (Tapped TBHT to 63.8 A
Saturday, March 14, 2020, 12:16
IGP1= 8.1e-05 Torr
start autoramp at 0.25A/min
Saturday, March 14, 2020, 17:47
IGP1= 2.9e-05 Torr
TGHT= 78.4A, 1.0 V
TBHT = 79.4A, .88 V
manual and automatic tap up to 740A TGHT and 230A TBHT then tap manually to 1800 C (mostly at .075 A/min and increasing to 1A /min as pressure stabilizes)
Sunday, March 15, 2020, 22:40
OMEGA = 1711 C
TGHT = 784,6 A, 12.9V (readback)
TBHT = 232 A, 3.5 V
Tap TGHT to 800 A readback set to 815A
Sunday, March 15, 2020, 23:20
OMEGA =1801 C
TGHT = 799.2 A, 13.3 V, TBHT = 232.9, 3.6V
Start gradual tap-down as temperature rising (1810 C at end of this note)
Sunday, March 15, 2020, 23:49
OMEGAA = 1818 C
TGHT = 769.9A, 12.6 V; TBHT = 232.9 A, 3.6 V
Temperature dropping tapped back up to 799 A on TGHT read back (set to 815 A)
Monday, March 16, 2020, 04:10
OMEGA = 1395 C (not reliable)
TGHT = 799.2 A, 13.2 V
TBHT = 232.9 A, 3.6 V
IGP1 = 2.2 e-06 Torr
Initiate cooling at -1.5 A/min on TGHT to 600A (at 600 A increase cooling rate to 3 A/min ; at 300 A increase cooling to 4 A/min and start TBHT cooling at 1 A/min; at `200 A on TGHT increase cooling to 4 A/min and TBHT 2 A/min)
Monday, March 16, 2020, 09:43
TGHT = 0 A , 0.02V
TBHT = 53,2 A, .56 V (increase cooling to 4 A/min)
IGP1= 1.12e-07 Torr
Monday, March 16, 2020, 10:37
IGP1= 9.5 e -8 Torr
TGHT and TBHT = 0A, 0V
Will unload container
Monday, March 16, 2020, 12:40
Ten discs removed for evaluation (6 from left side and 4 from right side)
two graphite discs placed at each end as well as two TaC coated and sintered end-caps
total length after sintering = 17.8 cm
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Thursday, June 11, 2020, 13:01, Darwin Ortiz Rosales, Empty, 44139-12, LP-SIS, Done,
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Thursday, June 11, 2020, 09:56
Previous day (Wednesday June 10, 2020)
Container coated with TaC and wrapped with 3 Ta heat shields.
Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.
TBHT will be set fixed at 230 A (max).
Good vac at 3.00e -5 Torr
Bad vac at 5.00e-5 Torr
Chamber pump down
Thursday, June 11, 2020, 10:19
IEVAP2:IGP1=1.06e-6 Torr
ramping to 40A (TGHT and TBHT) at 1A/min
Thursday, June 11, 2020, 12:35
IEVAP2:IGP1=1.8e-6 Torr
TGHT = 39.8 A, 0.45V
TBHT=38.5 A, 0.48V
Manually rampted to 45A on both TGHT and TBHT
Thursday, June 11, 2020, 12:58
IEVAP2:IGP1=1.6e-6 Torr
TGHT = 34.8 A, 0.52V
TBHT=44.2A, 0.55V
Start Autoramp at .5A/min to 400A on TGHT and 230A on TBHT
Thursday, June 11, 2020, 17:14
Irregular pressure profile. Cooling . Need to check for leak.
TGHT = 99 A 1.3 V
TBHT = 99 A 1.4 V
Friday, June 12, 2020, 12:59
Restarting ramping
IGP1= 4.98e7 Torr
Autoramp at 1A/min to 400A on TGHT and 230A on TBHT
(pressure and TGHT current and voltage profile seem normal compared to previous coating sintering with the same power supply)
Friday, June 12, 2020, 14:40
Paused ramping
TGHT = 90A
After a few minutes the profile (noise) was still there. Continue autoramp at 0.5A/min to 400 A on TGHT and 230A on TBHT
Friday, June 12, 2020, 15:21
IGP1= 1.97e-06 Torr trending down
TGHT = 111.5 A , 1.5 V
TBHT = 112.9 A, 1.9 V
Increase ramping speed to 1A/min to 400A on TGHT and 230A on TBHT
Friday, June 12, 2020, 20:50
OMEGA = 1754 C
IGP1= 2.5e-6 Torr
TGHT = 394.1 A, 6.6 V
TBHT = 232.8 A, 4.0 V
Tapping to 1900 C
Friday, June 12, 2020, 21:00
OMEGA =1901 C
IGP1= 5.6e-6 Torr
TGHT = 448.3 A, 7.5 V
TBHT = 232.8 A, 4.1 V
Saturday, June 13, 2020, 00:51
OMEGA = 1898 C
IGP1 = 2.0e-6 Torr
TGHT = 447.2 A, 7.5 V
TBHT = 232.9 A, 4.1 V
Start cooling at -2A/ min for TGHT and -1A/min for TBHT
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Monday, June 15, 2020, 14:28, Darwin Ortiz Rosales, Empty, 42218-7, HP-SIS, Done, TaC coating/sintering
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Monday, June 15, 2020, 13:30
Container coated with TaC and wrapped with 3 Ta heat shields.
Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.
TBHT will be set fixed at 230 A max).
Good vac at 3.00e -5 Torr
Bad vac at 5.00e-5 Torr
Chamber pump down
Tuesday, June 16, 2020, 08:55
IGP1= 4.2e-7 Torr
Starting ramp to 50A at 0.2A/min for both TGHT and TBHT. Observing pressure behaviour.
Tuesday, June 16, 2020, 14:14
IGP1 = 9.0e-7 Torr
TGHT = 50.3 A, 0.6 V
TBHT = 49.4 A, 0.54 V
Set TGHT to 400A and TBHT to 230A
Tuesday, June 16, 2020, 16:58
IGP1 = 7.32e-7 Torr
TGHT = 82.3A, 1.0 V
TBHT = 81.8 A, 0.96V
Will try to increase ramp rate to 2 A/min for both TGHT and TBHT
Tuesday, June 16, 2020, 17:30
Pressure spike.
IGP1 = 2.5e-5Torr
TGHT = 44.1 A, 0.57 V
TBHT = 43.0 A, 0.49 V
Will return to 0.2A/ min ramp rate for both heaters
Thursday, June 18, 2020, 20:26
Autoramped to 720A , 11.6V on TGHT at 0.2A/min
OMEGA = 1850C
Manually ramped to 740 A , on TGHT while TBHT remains at 230A
OMEGA= 1885 C
IGP1=4.6e-06 Torr trending down
Will remain at this temperature for next 4 hours
NOTE* Current on TGHT very unstable (oscillates)
Friday, June 19, 2020, 11:31
Last night at 00:15 am started cooling TGHT at -2A/min and TBHT at -0.2 A/min
(The elog entry was not submitted and computer restarted overnight so notes were lost).
at 6:30 am Friday June 19, 2020
Increased TBHT cooling to -2A/min and decreased THGT cooling to -1A/min
Monday, June 22, 2020, 13:54
IGP1= 8.1e-8 Torr
Evaporator vented and container pulled out. There is slight peeling near one end of the container. This area should be on the outside of the end-caps so the container should be usable.
Files to be uploaded later.
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Thursday, July 16, 2020, 11:15, Darwin Ortiz Rosales, SiC, 44139-11, LP-SIS, Done, SiC sintering for Luca 1 of 2
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Thursday, July 16, 2020, 11:15
Coated Ta tube cotaining 233 SiC disks wrapped with Ta heat-shields (3 layers)
Desired temperature= 1800C (expected TGHT 410 A), TBHT will be set fixed at 230A (max).
Evap 2 was pumped down
Friday, July 17, 2020, 08:49
Total length packed approximately 10 cm
container has 3 Ta heat shields.
No endcaps inserted to facilitate out-gassing
Two TaC coated Ta wire springs inserted at both ends.
Initially to ramp TGHT and TBHT to 40 A at 0.5 A/min
Then heat ramping TGHT manually and automatically to reach 400 A (Omega slope set = 0.990)
Then ramp to temperature = 1800 C
TBHT will be set fixed at 230 A (max). TBHT heated manually and automatically to max.
Good vac at 3.00 e -5 Torr
Bad vac at 5.00 e-5 Torr
Initial IGP1 = 6.45e-07 Torr
Friday, July 17, 2020, 20:49
TBHT = 38.9 A, 0.47 V
TGHT = 39.7 A, 0.59 V
IGP1 = 9.1e-06 Torr
Autoramp to 50 A at 0.5 A/min for both TGHT and TBHT
Saturday, July 18, 2020, 09:04
IGP1 = 1.6e-06 Torr
TGHT = 50.5 A, 0.76V
TBHT = 49.7 A, 0.62 V
Starting autoramp at 0.5 A/ min to 400 A TGHT and 230 A TBHT
Saturday, July 18, 2020, 10:17
IGP1 = 5.06e-05 torr
stopped autoramp and allow pressure to decrease and stabilize
Saturday, July 18, 2020, 10:47
IGP1 = 6.65 e-06 Torr and trending down
TGHT = 55.4 A, 0.83 V
TBHT= 54.6 A, 0.68 V
Change autoramp to 0.25 A/min for both heaters (.05 increments and 120s wait)
Sunday, July 19, 2020, 08:46
IGP1= 2.2 e-05 Torr
TBHT = 109.5 A, 1.6 V
TGHT = 106.6 A, 1.7 V
increased ramping rate to .5A/min by decreasing wait intervals to 60 s
Sunday, July 19, 2020, 14:55
IGP1 = 7.1 e -06 Torr
TGHT = 271.8 A, 4.7 V
TBHT = 233.1 A, 4.1 V
Increasing ramping rate to 1 A/min
Sunday, July 19, 2020, 17:35
IGP1 = 2.6e-06 Torr
TGHT = 400 A, 7.2 V
TBHT = 233 A, 4.1 V
Tap manually to 410 (expected 1800 C )
Note* OMEGA reading cannot be obtained.
Leave at 410 A on TGHT for 4 hours.
Sunday, July 19, 2020, 22:57
IGP1 = 7.0 e-07 Torr
TGHT= 410 A , 7.2 V
TBHT = 233 A, 4.2 V
Start cool down at -2A/min for TGHT and -1A/min for TBHT
Monday, July 20, 2020, 12:20
IGP1 = 2.2e-07 Torr
Unloading target |
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Monday, July 20, 2020, 19:25, Darwin Ortiz Rosales, SiC, 44139-11, LP-SIS, Done, SiC sintering for Luca 2 of 2
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Monday, July 20, 2020, 19:27
Coated Ta tube cotaining 355 SiC disks wrapped with Ta heat-shields (3 layers)
Desired temperature= 1800C (expected TGHT 410 A), TBHT will be set fixed at 230A (max).
good vacuum = 3.00 e-05 Torr
bad vacuum = 5.00 e-05 Torr
Evap 2 was left to pump down over night.
Monday, July 20, 2020, 23:06
IPG1 = 3.1e-06 Torr
Start autoramp at .25A/min to 40A for both TGHT and TBHT
Tuesday, July 21, 2020, 08:06
TGHT = 40.3 A, 0.51 V
TBHT = 39.0 A, 0.46 V
increase auto ramp limit to 50 A for both TGHT and TBHT
IGP1=1.8e-05 Torr
Tuesday, July 21, 2020, 16:22
IGP1= 1.5 e-05 Torr
TGHT = 50.1 A, 0.65 V
TBHT = 50.0 A, 0.60 V
Change ramp target to 350 A for TGHT and 230A for TBHT
Wednesday, July 22, 2020, 13:24
Stopped autoramp. Will allow pressure to drop.
TGHT = 64.0 A, 0.86 V
TBHT = 64.5 A, 0.82 V
Thursday, July 23, 2020, 23:55
TGHT Reached 430 A, 7.7 V
OMEGA reads 1310 C but reading is not considered accurate so will leave at this current for 4 hours.
Friday, July 24, 2020, 11:31
IGP1 = 1.98e-07 Torr
Window for pyrometer was coated with condensate.
Dismounted target and cleaned two windows in line with the pyrometer.
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Saturday, July 25, 2020, 08:58, Darwin Ortiz Rosales, ZrC, 44139-7-SK, , In progress, ZrC for Luca's experiments
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Friday, July 24, 2020, 15:00
Ta tube cotaining 497 ZrC discs wrapped with Ta heat-shields (3 layers)
Desired temperature= 1800C (expected TGHT 410 A), TBHT will be set fixed at 230A (max).
good vacuum = 3.00 e-05 Torr
bad vacuum = 5.00 e-05 Torr
Evap 2 was left to pump down over night.
Saturday, July 25, 2020, 08:57
IGP1= 8.7 e-07 Torr
Start ramp at 0.25 A/min to 20 A on TGHT
Saturday, July 25, 2020, 10:07
IGP1= 2.7e -06 Torr
Set ramp target to 30 A
Wednesday, July 29, 2020, 13:11
OMEGA reading 1700 C at 430 A during the night. It was kept at this temperature for 3.5 hours. The OMEGA slope was not changed from 0.990
when IGP1 = 1.2 e-06 Torr and stable, cooling was started at -3A/min at 9 am on this day.
IGP1= 2.2 e-07 Torr now at time of dismounting
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Friday, September 25, 2020, 10:32, Darwin Ortiz Rosales, Nb, , TARGET BOAT, Done, Heat Treatment of Nb for Edward
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Friday, September 25, 2020, 10:30
Target boat with a layer of niobium foil on the bottom is used to heat up Nb samples to 1400 C for 4 hrs.
OMEGA slope = 0.99
The niobium samples are wrapped in two layers of Nb foil.
Boat is wrapped with 2 layers of Ta foil, careful to avoid touching samples.
Friday, September 25, 2020, 10:35
Manually ramped TGHT to 40 A and kept at that current for approximately 15 minutes.
Then started autoramp at 1A/min up to 100 A
Friday, September 25, 2020, 16:58
IPG1= 4.7e-07 Torr
TGHT =100.0 A, 1.3 V
Start autoramp to TGHT to 300 A @ 2A/min
@ 300A temperature = 1179 C
Friday, September 25, 2020, 20:00
autoramp to 345 A
Friday, September 25, 2020, 20:39
TGHT = 345 A, 5.4 V
OMEGA = 1296 C
IPG1= 8.1 e-07 Torr
Ramp manually to 1400 C
Friday, September 25, 2020, 20:51
reached 1400 C on OMEGA at TGHT = 476 A
Friday, September 25, 2020, 20:59
OMEGA increased to 1410, lowered TGHT to 468 A to get back to 1400 C on OMEGA
Friday, September 25, 2020, 21:40
Lowered TGHT to 463 A, 5.79 V to bring OMEGA to 1400 C from 1404 C
Saturday, September 26, 2020, 00:51
Sample has been at 1400 C for 4 hours.
IGP1= 7.2 e-07 Torr
Cooling at- 2A/min
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Monday, February 01, 2021, 13:57, Darwin Ortiz Rosales, SiC, 40282-4, TARGET BOAT, Done, Sintering of SiC discs for SEM
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Monday, February 01, 2021, 13:52
Ta boat loaded with 20 Disc on either end capped with Ta springs to prevent overexpansion. discs wrapped Graphite foil and boat wrapped in Ta heat-shields (3 layers).
Sample A on left side and sample B on right side.
Desired temperature= 1800C (expected TGHT 410 A).
good vacuum = 3.00 e-05 Torr
bad vacuum = 5.00 e-05 Torr
Evap2 left to pump down over night.
Tuesday, February 02, 2021, 10:01
Pressure stable at IGP1= 7.8e-7 Torr
TGHT autoramp set to 50 A @ 1/min
Tuesday, February 02, 2021, 13:45
IGP1=3.5e-6 Torr
TGHT =49.9 A, 0.56 V
Ramp at 1A/min to 100A
Wednesday, February 03, 2021, 08:25
IGP1= 5.5 e-07 Torr
TGHT = 100 A, , 1.2 V
Yesterday the camera failed to operate. Cloud service discontinued. The TS camera is offline but it is a different provider. Will start ramping to 400A .
Ramp rate 2A/min
Wednesday, February 03, 2021, 15:55
ramped up to 520 A and 9.1V TGHT
Temperature average 1644 C but suspect actual temperature higher.
Held for 5 hours and started ramp down at -2A/min
Thursday, February 04, 2021, 9:35
IGP1= 2.99e-7 Torr
Begin pumpdown procedure and remove container
Note: SiC evaporation on most discs. The temperature was too high. Need to repeat.
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Saturday, February 13, 2021, 08:14, Darwin Ortiz Rosales, SiC, 41992-1, TARGET BOAT, Done, Sintering of SiC discs for SEM
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Saturday, February 13, 2021, 08:10
Ta boat loaded with 80 discs enclosed in graphite foil in pockets of 20. Sample A at both ends and sample B in the middle spaced out. Boat wrapped in Ta heat-shields (3 layers).
(A B B A)
Desired temperature= 1800C (expected TGHT approx 410 A).
good vacuum = 3.00 e-05 Torr
bad vacuum = 5.00 e-05 Torr
Evap2 left to pump down over previous night.
IGP1= 5.4e-7 Torr and stable
Initiating TGHT ramp up at 1 A/ min to 30 A
Saturday, February 13, 2021, 12:19
IGP1= 6.9e-06 Torr
Ramp to 50 A 1A/min
Saturday, February 13, 2021, 14:35
IGP1 = 6.4e-6 Torr
Pressure trending down.
Saturday, February 13, 2021, 14:56
IGP1= 4.9 e-6 Torr
Initiate Ramp up @ 1 A/min to 400 A
Changed ramp up to 0.5 A/min at around 11:30 pm
Sunday, February 14, 2021, 11:43
The current will be ramped up to 420 A according to the trendline approximation (see attachement 1)
Sunday, February 14, 2021, 12:26
IGP1 = 8.9 e-06 Torr and trending down
TGHT = 420 A, 7.5 V
OMEGA = 1730 C
Will ramp up to 428 A manually
Sunday, February 14, 2021, 12:30
Reached 428 A on TGHT.
OMEGA = 1760 C
Will bump to 430 A and hold for 4 hours
OMEGA= 1765 C
Sunday, February 14, 2021, 18:00
OMEGA = 1789 C
IGP1= 7.5 e -7 Torr
TGHT = 430.5 A , 7.8 V
Start ramping down at -1A/min to zero A
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Tuesday, March 02, 2021, 11:32, Darwin Ortiz Rosales, TaC, 44691-5, LP-SIS, Done, TaC coating/sintering
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Tuesday, March 02, 2021, 11:26
Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)
Initial weight including heat-shields = 433.8 g
Desired temperature = 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).
Evap 2 will be pumped down over night.
Good vacuum = 3.00 e-5 Torr
Bad vacuum = 5.00 e-5 Torr
Wednesday, March 03, 2021, 13:28
IGP1 = 4.0 e-7 Torr
Start ramping @ 1A/min to 20A on both TGHT and TBHT
Wednesday, March 03, 2021, 15:03
Start ramping @1/min to 60A on Both TGHT and TBHT
Wednesday, March 03, 2021, 22:42
TGHT = 60A, TBHT = 60A
IGP1= 4.2 e-7 stable
Start ramping to 400A @ .5A/min for TGHT and @0.5A/min for TBHT to 230A
Thursday, March 04, 2021, 11:56
TGHT = 400 A, TBHT =230A
IGP1= 1.9e-6 Torr
OMEGA = 1695 C
Continue ramp up @0.5A/min to 430A on TGHT
Thursday, March 04, 2021, 14:02
IGP1 = 1.87e-6 Torr
TGHT = 434 A , 7.2 V
OMEGA = 1787 C
Will tap up manually 450A @ on TGHT and leave at that current for ~4 hours
Thursday, March 04, 2021, 19:35
After ~ 5 hours at 1829 C max OMEGA reading
OMEGA = 815 C
Start ramp down at 1A/min on TGHT and 0.8A/min for TBHT
IGP1= 1.2e-6 Torr
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Friday, March 05, 2021, 10:48, Darwin Ortiz Rosales, TaC, 44691-1, LP-SIS, Done, TaC coating/sintering
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Friday, March 05, 2021, 10:47
Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)
Initial weight including heat-shields = 431.0 g
Desired temperature = 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).
Evap 2 will be pumped down over night.
Good vacuum = 3.00 e-5 Torr
Bad vacuum = 5.00 e-5 Torr
Saturday, March 06, 2021, 10:29
IGP1= 2.7 e-07 Torr and stable
AutoRamp at 1A/min to 40 A on TGHT and TBHT
Saturday, March 06, 2021, 22:36
IGP1= 2.2e-07 Torr
TGHT = 40.3 A, .46V
TBHT = 38.48 A, .48 V (set to 40 A)
Start Autoramp at 0.5A/min to 400 A on TGHT and 230A on TBHT
Sunday, March 07, 2021, 07:48
IGP1=8.5e-7 Torr
TGHT = 287 A, 4.6V
TBHT = 232 A, 4.0 V
OMEGA = 1493C
Increase ramp speed on TGHT to 2A/min to 400A
Sunday, March 07, 2021, 08:36
IGP1=1.7 e-06 Torr
TGHT = 373.7 A, 6.3V
TBHT = 232.9 A, 4.1 V
OMEGA = 1752 C
Sunday, March 07, 2021, 08:53
IGP1= 1.7e-06 Torr
TGHT = 400 A, 6.8 V
TBHT = 232.8 A, 4.1 V
OMEGA= 1842
Ramp TGHT @ 2A/min to 420 A as per attached current approximation
Sunday, March 07, 2021, 09:25
OMEGA=1915 C
TGHT = 420A, 7.2V
TBHT= 232.8 A, 4.1V
IGP1= 1.6 e-06 Torr
Tap down manually to approx 1900 C
TGHT = 412.9 A, 7.0 V and OMEGA=1900 C
Will leave for about 4 hours at this temperature
Sunday, March 07, 2021, 13:05
IGP1= 1.1 e-06 Torr
TGHT = 415 A, 7.2 V
TBHT = 232.8 A, 4.1 V
OMEGA = 1880C
Start cool down at -2A/min on TGHT and -1A/min TBHT
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Tuesday, March 09, 2021, 11:54, Darwin Ortiz Rosales, TaC, 42464-1, HP-FEBIAD, Done, TaC coating/sintering
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Tuesday, March 09, 2021, 11:54
Container coated with TaC and wrapped with 3 Ta heat shields.
Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be increased accordingly to reach desired Temp.
TBHT will be set fixed at 230 A max).
Good vac at 3.00e -5 Torr
Bad vac at 5.00e-5 Torr
Chamber pump down
Wednesday, March 10, 2021, 08:32
IGP1 = 2.6 e -07 Torr
Start autoramp @ 1A/min to 40 A on both TGHT and TBHT
***Autoramp aborted due to work on EF12 affecting EVAP2***
Will have to resume Thursday or Friday
Saturday, March 13, 2021, 7:54
IGP1= 3.8e-07 Torr
Initiate heating @ 0.5A/min TBHT and TGHT to 60 A
Saturday, March 13, 2021, 23:01
IGP1 = 2.7e-07Torr
TGHT = 60.5A, 0.7V
TBHT= 60.0A, 0.7V
Initiate ramp @ 1 a/min to 400 A on TGHT and 230A on TBHT
Sunday, March 14, 2021, 08:45
IGP1= 8.2e-07 Torr
TGHT = 400A, 5.6V
TBHT = 232.9A, 3.0V
OMEGA = 1142 C
Continue ramping to 460 A on TGHT at 1a/min
Sunday, March 14, 2021, 10:11
IGP1 = 1.0 e-06 Torr
TGHT= 460.4 A, 6.5 V
TBHT = 232.9 A, 3.0 V
OMEGA = 1239 C
Will ramp up to 500 A at 1a/min on TGHT
Sunday, March 14, 2021, 10:53
IGP1 = 1.3 e-06 Torr
TGHT= 495 A, 7.2 V
TBHT = 232.9 A, 3.0 V
OMEGA = 1316 C
Will ramp up to 600 A at 1a/min on TGHT
Sunday, March 14, 2021, 12:45
IGP1 = 3.0 e-06 Torr
TGHT= 604 A, 9.1 V
TBHT = 232.9 A, 3.1 V
OMEGA = 1610 C
Will ramp up to 660 A at 1a/min on TGHT
Sunday, March 14, 2021, 17:01
IGP1= 2.4e-06 Torr
TGHT = 664 A, 10V
TBHT = 232.9 A, 3.1V
OMEGA = 1733 C
tapping TGHT to 740 A
OMEGA = 1883 C
Sunday, March 14, 2021, 21:45
IGP1= 3.1e-06 Torr
TGHT = 744A, 11.5V
TBHT = 232.9 A, 3.2V
OMEGA = 1875 C
Start cooling TGHT @-3A/min and TBHT @-1A/min
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Tuesday, March 16, 2021, 08:29, Darwin Ortiz Rosales, TaC, , TARGET BOAT, Done, sintering of TaC on Caps and springs
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Tuesday, March 16, 2021, 08:28
Each endcap is separated with a disc of graphite foil and rolled into packs of 5 within a foil envelope in a target boat.
There are also 4 coated springs, one in between endcaps and three on the ends
The boat is wrapped with 3-layers of Ta heatshields.
Chamber pumping down
OMEGA slope = 0.99
Will ramp TGHT up to 40 A then autoramp to 400A at 1A/min.
Final desired temperature on OMEGA (tap)= 1800C
Tuesday, March 16, 2021, 11:22
IGP1= 3.5e-06 Torr
TGHT = 40A, 0.4V
Will ramp up at 1A/min to 400 A
Wednesday, March 17, 2021, 08:06
IGP1= 2.98 e-07 Torr
TGHT = 400 A, 4.3V
OMEGA shows no temperature reading. Will ramp up to 450A at 1A/min
Wednesday, March 17, 2021, 08:58
OMEGA still shows no reading
IGP1= 4.2e-07 Torr
ramping to 470A @ 1A/min
Wednesday, March 17, 2021, 09:21
OMEGA no reading
IGP1 = 4.4 e-07 Torr
TGHT = 470 A, 5V
ramp up to 490 A at 1A/min
Wednesday, March 17, 2021, 11:05
TGHT at 490 A, 5.2 V since 10 am. Will start cooling at 2 pm.
Wednesday, March 17, 2021, 13:47
TGHT = 493A, 5.3V
IGP1= 3.2e-07 Torr and stable
Start ramp down at -2A/min
Thursday, March 18, 2021, 11:20
The boat was dismounted but the materials had not sintered properly. The boat looked very twisted. Everything was transferred to a new boat with uncoated Ta caps at either end.
It was left overnight to establish vacuum.
Friday, March 19, 2021, 08:23
IGP1= 2.2 e-07 Torr
initiate heating at 1A/min on TGHT to 60 A
Friday, March 19, 2021, 10:04
IGP1= 3.6 e-07 Torr
TGHT = 60 A, .73 V
Ramp up to 450 A @ 2A/min
Friday, March 19, 2021, 14:26
OMEGA 1895 at 455A, 8.4 V
manually ramp down to 1800C
OMEGA 1800C at 416A, 7.6V
will leave like that for 3 hours more
Friday, March 19, 2021, 17:12
OMEGA 1795 C
TGHT = 415A, 7.6V
IGP1= 6.8e-07 Torr
Start ramp down at -2A/min
Monday, March 22, 2021, 23:07
Marla removed from Evap 2. Sintering vwas very good. The container with Ta caps is better for sintering these pieces.
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Wednesday, April 28, 2021, 11:57, Darwin Ortiz Rosales, SiC, 42218-7, HP-SIS, Done, sintering discs for SiC#41 (or back-up for #40)
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Wednesday, April 28, 2021, 11:54
Total number of foils: 449 (not including analysis discs)
Total length packed 16.7 cm
5 extra analysis discs and 2 dr. Blade discs
container has 3 Ta heat shields.
No endcaps inserted to facilitate out-gassing
One Ta disc inserted at front end
Initially to ramp TGHT and TBHT to 50A at0.5 A/min
Then heat manually to OMEGA ~1400 C , ramping TGHT manually and automatically to reach 530A A (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 -5 Torr
Bad vac at 5.00 e-5 Torr
Thursday, April 29, 2021, 10:09
IGP1 = 6.5 e-07 Torr
Start heating at 0.5 A/min to 50 A on both TGHT and TBHT
Thursday, April 29, 2021, 21:45
IGP1= 7.7 e-06
TGHT = 50.3A , 0.59 V
TBHT = 49.4 A, 0.56 V
Pressure is taking a while to equilibrate. Will wait a bit more to continue heating
Thursday, April 29, 2021, 23:49
IGP1 = 7.2 e-06 Torr
will start ramping at 0.5 A/min to 100 A
Saturday, May 01, 2021, 20:09
Friday, April 30, 2021, 08:19
IGP1 pressure higher than bad vacuum. Stopped autoramp. Will allow vacuum to come back down and restart ramp.
Saturday, May 01, 2021, 09:04
Yesterday the system had tripped. All pumps had turned off and the pressure was found at 0.005 torr
vacuum was restarted.
Current IGP1= 6.5e-07 Torr
Restarting heaters.
Autoramp at 0.5A/min to 20A on both TGHT and TBHT
Saturday, May 01, 2021, 10:48
IGP1=5.9e-7 Torr
TGHT = 20.0 A, 0.24V
TBHT = 20A, 0.20V
Autoramp at 0.5A/min to 40A both TGHT and TBHT
Saturday, May 01, 2021, 13:26
TGHT = 40.0 A, 0.47 V
TBHT= 39A, 0.44V
IGP1= 5.5 e-07 Torr
Autoramp at 0.5A/min to 60 A on both TGHT and TBHT
Saturday, May 01, 2021, 20:09
TGHT = 60.0 A, 0.72V
TBHT = 59.4 A, 0.69V
IGP1= 4.4e-07 Torr
Autoramp at 0.5A/min to 100 A on both TGHT and TBHT
Sunday, May 02, 2021, 18:30
IGP1= 1.7 e-06 Torr
TGHT =100A, 1.3V
TBHT = 99.9A, 1.3V
Autoramp both heaters at 0.25A/min to 120A and monitor
Sunday, May 02, 2021, 18:45
pressure increase to 4.1e-06 Torr. TBHT unexpectedly rose to 120A and was manually tapped back down to 104 A. Will keep both , TGHT and TBHT, at 104 A for a while.
Sunday, May 02, 2021, 19:50
Stepping at 0.5A/min to 105A then to 110 A on both TGHT and TBHT
Sunday, May 02, 2021, 22:10
Will leave both TGHT and TBHT at 110 A until pressure comes back down
currently IGP1= 1.3e-05 Torr
Monday, May 03, 2021, 09:35
IGP1= 2.2 e-06 Torr
Tapping TGHT and TBHT to 115A
Monday, May 03, 2021, 11:30
Tapping TGHT and TBHT to 120A @ 1A/min
Monday, May 03, 2021, 18:38
IGP1= 5.4e-06 Torr
TGHT = 130.3 A, 1.8 V
TBHT = 129.1 A, 1.8 V
Continue gradual ramping at 1A/min in increments of 5 A
Tuesday, May 04, 2021, 09:27
IGP1= 3.2e-5 Torr
TGHT = 400 A, 6.0V
TBHT = 232 A, 3.6V
OMEGA = 1104 C
waiting for pressure to drop then will continue heating
Tuesday, May 04, 2021, 17:27
TGHT = 420.1 A, 6.5V
TBHT= 232A, 3.6V
OMEGA = 1139 C
IGP1= 1.15e-5 Torr
will increase ramp up at 0.5A/min to 430A and hold (TGHT)
Tuesday, May 04, 2021, 22:43
TGHT= 430A, 6.6V
TBHT = 232.8A, 3.6V
OMEGA= 1157 C
IGP1=6.6e-6 Torr
Set Autoramp at 0.5A/min to 540 A (TGHT)
Wednesday, May 05, 2021, 08:09
IGP1= 7.5e-06 Torr
TGHT = 534 A, 8.5V
TBHT=232 A, 3.7 V
OMEGA = 1485
Continue ramp at 0.5A/min to to 600 A on TGHT
Wednesday, May 05, 2021, 15:07
IGP1=1.2e-5 Torr
TGHT=601A, 9.6V
TBHT= 232A, 3.7V
OMEGA =1600 C
ramp to 650A on TGHT at 0.5A/min
Wednesday, May 05, 2021, 20:05
Tapped TGHT to 694A, 11.4 V (manually)
TBHT= 232A, 3.7V
OMEGA = 1790 C
IGP1= 2.5e-05 Torr
Will monitor Pressure and temperature . Will start 4 hour count.
Wednesday, May 05, 2021, 22:03
OMEGA = 1765 C
TGHT = 694A, 11.5V
TBHT = 232A, 3.8 V
IPG1= 1.6e-05 Torr
Manually bumping TGHT to 700 A
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Friday, June 11, 2021, 08:41, Darwin Ortiz Rosales, Nb, , TARGET BOAT, Done, Nb treatment for Norman
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Friday, June 11, 2021, 08:05
Target boat with a layer of niobium foil on the bottom is used to heat up Nb samples to 1100 C for 4 hrs.
OMEGA slope = 0.99
The niobium samples are wrapped in a layer of Nb foil.
Boat is wrapped with 2 layers of Nb foil.
Good vacuum 3.00e-02 Torr
Bad vacuum 5.00e-02 Torr
Autoramping TGHT at 2A/min to 50A then to 100A, then monitor until desired temperature
Initial IGP1= 9.4e-07 Torr
Friday, June 11, 2021, 09:59
TGHT = 200 A, 2.7V
IGP1= 9.8e-07 Torr
Tap to 1100C
Friday, June 11, 2021, 10:09
Temperature reached at 10:05 am.
TGHT = 224A, 3.1V
IGP1= 1.0e-06 Torr
OMEGA= 1100C +/- 10C fluctuations
Friday, June 11, 2021, 14:10
TGHT = 224A, 3.1V
IGP1= 9.2e-.07 Torr
OMEGA = 1100C +/- 10C fluctuations
Started rampdown at -3A/min
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