ID |
Date |
Author |
Target Material |
Target Oven W.O# |
Source |
Status |
Subject |
246
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Wednesday, October 02, 2019, 11:10 |
Marla Cervantes | UO2/C | | TARGET BOAT | Done | UCx#29 Carbothermal reduction | Wednesday, October 02, 2019, 11:09
A graphite cartridge loaded with UO2/C foils, wrapped with three Ta heat shields was placed in the EVAP1.
The EVAP1 is currently pumping down.
Thursday, October 03, 2019, 09:40
Pressure limits:
Good vacuum 1e-1 Torr
Bad vacuum 5e-1 Torr
Initial vacuum IGP1 = 9.54e-7 Torr
Current tapped manually to 80 A at 1A/s in 5 A blocks with a waiting period of 25 s between each increment.
Thursday, October 03, 2019, 10:36
The pressure started decreasing after 45 min and the auto ramp was set to 1 A each 30 s to 86 A
The autoramp was set to 2 A each 10 s to 180 A
The autoramp was set to 3.2 A each 10 s to 300 A
The autoramp was re start at 3.2 A each 10 s to 400 A
The autoramp was set to 1 A each 10 s to 430 A
The autoramp was set to 2 A each 10 s to 450 A
The autoramp was set to 2 A each 10 s to 480 A
Autoramp at 2 A per min to 500 A
Manually tapped to 545 A.
After 48 hrs at maximum temperature, the target was cooled done at -2 A/min |
Attachment 1: CarbothermalReduction-UCx29.JPG
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248
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Monday, October 28, 2019, 11:23 |
Marla Cervantes | UO2/C | | TARGET BOAT | In progress | UCx#30 Carbothermal Reduction | Monday, October 28, 2019, 10:29
A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets
The set up was installed in the EVAP1 and pumped dwon during the weekend.
IGP1 = 1.10 e-6 Torr
Monday, October 28, 2019, 10:31
Good vacuum = 1e-1 Torr
Bad vaccum = 5e-1 Torr
The current ramp is 1 A each 10 s from 0 A to 100 A
Monday, October 28, 2019, 11:13
After 18 min the pressure started dropped.
Monday, October 28, 2019, 11:22
When the pressure reduced to 5e-4 Torr the current ramp was changed to 3.3 A each 10 s to 480 A, the vacuum limits stayed the same.
Monday, October 28, 2019, 11:45
The limit was set to 500 A with same ramp
Monday, October 28, 2019, 11:48
The ramp was changed to 1A/10s to 550 A
Monday, October 28, 2019, 11:55
At 520 A the pressure reach 1e-1 Torr and the autoramp stopped
Monday, October 28, 2019, 13:39
the current was increased manually at aprox. 1A/30 s
The current dropped suddenly even though the pressure was under the limits and the ramping was in the limits.
Autoramp was set to 3 A/ 10 s from to to 500 A
Then it was changed to 1 A /30s from 500 to 506 A
Finally it was changed to 1 A/ 10 s from 506 to 520 A
Manually tapped to 530 A
Monday, October 28, 2019, 15:40
At 13:45 the current reached 530 A. |
Attachment 1: UCx30-CarbothramlReduction.JPG
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Attachment 2: UCx30-CurrentDrop.JPG
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249
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Thursday, October 31, 2019, 13:59 |
Marla Cervantes | UO2/C | | TARGET BOAT | Problems | UCx#30 Carbothermal Reduction |
Marla Cervantes wrote: |
Monday, October 28, 2019, 10:29
A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets
The set up was installed in the EVAP1 and pumped dwon during the weekend.
IGP1 = 1.10 e-6 Torr
Monday, October 28, 2019, 10:31
Good vacuum = 1e-1 Torr
Bad vaccum = 5e-1 Torr
The current ramp is 1 A each 10 s from 0 A to 100 A
Monday, October 28, 2019, 11:13
After 18 min the pressure started dropped.
Monday, October 28, 2019, 11:22
When the pressure reduced to 5e-4 Torr the current ramp was changed to 3.3 A each 10 s to 480 A, the vacuum limits stayed the same.
Monday, October 28, 2019, 11:45
The limit was set to 500 A with same ramp
Monday, October 28, 2019, 11:48
The ramp was changed to 1A/10s to 550 A
Monday, October 28, 2019, 11:55
At 520 A the pressure reach 1e-1 Torr and the autoramp stopped
Monday, October 28, 2019, 13:39
the current was increased manually at aprox. 1A/30 s
The current dropped suddenly even though the pressure was under the limits and the ramping was in the limits.
Autoramp was set to 3 A/ 10 s from to to 500 A
Then it was changed to 1 A /30s from 500 to 506 A
Finally it was changed to 1 A/ 10 s from 506 to 520 A
Manually tapped to 530 A
Monday, October 28, 2019, 15:40
At 13:45 the current reached 530 A.
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The final pressure was IGP1 = 3.3e-6 Torr
After 18 hrs at maximum temperature the autoramp was set to -2 A/min to 0 A. |
259
|
Tuesday, May 26, 2020, 20:44 |
Darwin Ortiz Rosales | UO2/C | | TARGET BOAT | Done | UCx#33 Carbothermal Reduction | Tuesday, May 26, 2019, 18:20
A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (Friday May 22, 2020)
The set up was installed in the EVAP1 and pumped down during the weekend.
IGP1 = 7.10 e-7 Torr
Good vacuum = 1e-1 Torr
Bad vacuum = 5e-1 Torr
Current ramp is 1A per 10s from 0A to 120A
Tuesday, May 26, 2020, 19:15
Heater (TGHT) tripped after being at 120A about approximately 10 min.
The pressure was below 500 mTorr when the trip occured (around 20 mTorr) . Pressure did not appear to have gone past 200 mTorr but was dropping fast at the time of trip.
Will try again tomorrow after consulting with Gelo.
Wednesday, May 27, 2020, 10:26
Trying again while monitoring Power Supply reading ( Darwin Remotely and Marla onsite)
IGP1 = 7.7 e-7 Torr
Good vacuum = 1e-1 Torr
Bad vacuum = 5e-1 Torr
Current ramp is 1A per 10s from 0A to 120A
Wednesday, May 27, 2020, 10:49
Reached 120A on TGHT
TGHT= 0.92V
IGP1 = 3.6 e-06 Torr and rising
Wednesday, May 27, 2020, 12:46
TGHT = 120.2 A, 0.98V
IGP1 = 6.85e-6 Torr
Starting ramp at 3A per 10s up to 550 A or up to pressure drop start
Wednesday, May 27, 2020, 14:21
Heater tripped again at around 0.14 Torr and approx 440 A
Will start again hoping pressure stable enough to not trip heater.
Wednesday, May 27, 2020, 14:22
IGP1= 1.05e-6 Torr
Ramping to 120 A at 1 A per 10 s
Wednesday, May 27, 2020, 15:12
Starting ramp on TGHT at 3A per 10s up to 550A or pressure dip.
Wednesday, May 27, 2020, 15:35
Changed vacuum settings (paused ramp and restarted)
Good vacuum 1e-2
bad vacuum 5e-1
Wednesday, May 27, 2020, 16:30
TGHT = 549.4 A, 5.35V
IGP1= 2.1e-5 Torr
Reached 550 at approx 4 pm
Thursday, May 28, 2020, 00:31
IGP1= 3.31e-6Torr
TGHT = 549.3 A, 5.45V
Initiate ramp down at 2 A/min to 0A
Reduced cartridge was dismounted Friday, May 29, 2020 and transferred to Glove box.
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262
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Wednesday, June 03, 2020, 08:10 |
Darwin Ortiz Rosales | UO2/C | | TARGET BOAT | Done | UCx#34 Carbothermal Reduction | Wednesday, June 03, 2020, 08:11
A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (Friday May 29, 2020)
The set up was installed in the EVAP1 then IEVAP:IGP1 was replaced (elogs 260 and 261).
Vacuum was turned on after Ion Gauge swap.
IGP1 = 3.6 e-5 Torr
Good vacuum = 5e-2 Torr
Bad vacuum = 5e-1 Torr
Current ramp is 1A per 10s from 0A to 120A
Wednesday, June 03, 2020, 09:59
After about 20 minutes at 120 A, TGHT tripped again exactly as before.
Will restart ramp at 1A per 10s from 0A to 120A . Will set good vacuum to 1e-2 Torr
IGP1= 4.3e-05 Torr
Wednesday, June 03, 2020, 10:57
IGP1 = 9e-4 Torr
Pressure peaked around 4e-3 Torr and now trending down
TGHT =120 A
Wednesday, June 03, 2020, 11:23
IGP1=9.5e-5 Torr
Good Vacuum 1e-02 Torr
Bad Vacuum 5e-1 Torr
Starting TGHT ramp to 550 A at 3A per 10s
Wednesday, June 03, 2020, 14:41
ramp up was good. TGHT at 550 A since 12:30 pm. TGHT did not trip. *note adjusted good vacuum. Ramping takes a little longer but doesn't trigger TGHT shutdown.
Wednesday, June 03, 2020, 22:55
IGP1 = 3.5e-5 Torr
TGHT = 249.4 A, 5.7 V
Start ramp down at -2A per minute to 0 A
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271
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Saturday, June 05, 2021, 09:14 |
Marla Cervantes | UC2 | | TARGET BOAT | In progress | UCx#33 Conditioning | Saturday, June 05, 2021, 08:57
Target #33 was installed in the EVAP1 and pumped down yesterday (Friday 4).
Target #33 is going to be conditioned on a Ta boat wrapped with 3 Ta foils.
IGP1 = 3.85e-6 Torr
Good vacuum = 1e-1 Torr
Bad vacuum = 5e-1 Torr
Power desired 1.6kW. This is the first target conditioned this way,
Saturday, June 05, 2021, 09:13
Current ramp is 2A/30s to 400 A
Saturday, June 05, 2021, 10:59
TGHT = 3.5V, 399.7 A, 1.4 kW
IGP1 = 4.4e-5 Torr
Saturday, June 05, 2021, 11:00
Current ramp is 2A/30s to 450 A
Saturday, June 05, 2021, 11:14
TGHT = 4.06 V, 451.584 A, 1.4 kW
IGP1 = 4.86e-5 Torr
Saturday, June 05, 2021, 11:15
Current ramp is 2A/30s to 500 A
Saturday, June 05, 2021, 11:23
TGHT = 4.23 V, 467.2 A, 1.97 kW pressure was still increasing a little at 1.6kW
IGP1 = 4.86e-5 Torr
Saturday, June 05, 2021, 19:10
TGHT = 4.08 V, 459.52 A,
IGP1 = 6.4e-6 Torr
Initiate ramp down at 2 A/min to 0A |
272
|
Wednesday, June 30, 2021, 13:35 |
Darwin Ortiz Rosales | UO2/C | | TARGET BOAT | Done | UCx#34 conditioning | Target #34 was installed in the EVAP1 and pumped down (Tuesday June 29, 2021).
Target #34 is going to be conditioned on a Ta boat wrapped with 3 Ta foils.
IGP1 = 1.85e-6 Torr
Good vacuum = 1e-1 Torr
Bad vacuum = 5e-1 Torr
Power desired 1.6kW. This is the second target conditioned this way.
Subsequent targets should be conditioned following thermal reduction.
Thursday, July 01, 2021, 06:05
IGP1= 1.35e-06 Torr
Start autoramp @2A/30s to 400A
Thursday, July 01, 2021, 07:59
Pressure increase was observed near 400A
will ramp to 450A and keep for 8 hours
IGP1= 1.4 e-05 Torr
450A and 4.0V reached at 8:14 am on Thursday July 01, 2021
Rampdown @-2A/min was started at 4.14 pm on Thursday July 01, 2021 IGP1 stable at 2.7e-06Torr
Cannot transfer into glovebox yet because moisture is a bit high after regeneration. Moisture is dropping. Will wait until moisture is sufficiently low.
Monday, July 05, 2021, 20:43
Cartridge was removed and placed in bag inside glovebox
Removed 10 discs for analysis but might place them back inside depending on final decision. We had previously removed 10 discs after thermal reduction.
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273
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Wednesday, July 07, 2021, 12:40 |
Darwin Ortiz Rosales | UO2/C | | TARGET BOAT | Done | UCx Provisional ID= 200229 conditioning | Wednesday, July 07, 2021, 14:39
Target Provisional ID = 200929 was installed in the EVAP1 and pumped down (Tuesday July 7, 2021).
Target is going to be thermally reduced for 8 hours and then conditioned for an additional 8 hours
IGP1 = 2.0 e-6 Torr
Good vacuum = 1e-1 Torr
Bad vacuum = 5e-1 Torr
Power desired 1.6kW.
10 extra discs included for analysis
Wednesday, July 07, 2021, 14:49
Ramping up TGHT at 6A/min [wait interval = 10 s at increments of 1A]
Wednesday, July 07, 2021, 15:58
IGP1= 5.7 e-5 Torr and trending down. Will start ramp up to 450A at 18A/min [wait interval 10s at 3A increments]
Wednesday, July 07, 2021, 16:20
IGP1= 2.2e-3 Torr
Will continue ramping TGHT to 500A and watch pressure
Wednesday, July 07, 2021, 16:26
Continue ramping to 550 at 3A/10s
Wednesday, July 07, 2021, 16:29
holding at 550A, 5.1V for 8 hours
Wednesday, July 07, 2021, 23:41
TGHT = 550A, 5.7 V
begin ramp down at -2A/min to 450A and leave for 8 hours
Thursday, July 08, 2021, 08:20
IGP1= 2.7 e-06 Torr
TGHT = 450A, 4.5V
Will start ramp down at -2A/min to 0A
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274
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Wednesday, September 15, 2021, 07:19 |
Marla Cervantes | UC2 | | TARGET BOAT | Done | Conditioning 2sc samples | Wednesday, September 14, 2021, 21:14
Boat is wrapped with 2 layers of Ta-heat shield
The samples consists of 15 discs of UCx of 14mm diameter
The chamber is currently pumping down.
TGHT will be ramped up to 450 A
Wednesday, September 15, 2021, 07:17
IGP1 = 6.75e-6 Torr
Tapped up manually to 40A.
TGHT = 60 A, 2.39 V
Vacuum stable IG1 = 7.25e-6 Torr
Initiating auto-ramp for TGHT at a rate of 0.2A/min to 445 A
Parameter setup: 5.0e-5 good vac, 8.0e-5 bad vac.
Wednesday, September 15, 2021, 11:57
IGP1=2.24e-5 Torr
TGHT= 102.016 A, 1.275 V
Autoramp changed to 1A/min to 450 A
Wednesday, September 15, 2021, 12:53
IGP1 = 3.3e-5 torr
TGHT= 150 A, V
Autoramp changed to 2A/30s to 450 A
1e-1 good vac, 5e-1 bad vac
Wednesday, September 15, 2021, 12:59
Friday, September 17, 2021, 07:54
IGP1 = 3.81e-6 Torr
TGHT = 449.6 A, 4.31 V
Autoramp set to -2A/min to 0 A |
275
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Thursday, September 23, 2021, 07:03 |
Darwin Ortiz Rosales | UO2/C | | TARGET BOAT | Done | UCx#35 C reduction | Thursday, September 23, 2021, 06:55
A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (Wednesday September 22)
IGP1 = 3.6 e-5 Torr
Good vacuum = 5e-2 Torr
Bad vacuum = 5e-1 Torr
Current ramp is 2A per min from 0A to 120A and 1A/10s from 120A to (450-550A)
Thursday, September 23, 2021, 07:09
IGP1 = 1.84 e-06 Torr
Start Autoramp to 120A @ 2A/min
Thursday, September 23, 2021, 10:25
Start Autoramp to 550A @ 1A/10s
IGP1= 1.05e-05 Torr
TGHT= 120 A, 1.06 V
Thursday, September 23, 2021, 11:57
Pressure drop observed at 530A. Start 4 hour count.
Thursday, September 23, 2021, 15:57
IGP1= 9.1e-06 Torr
After 4 hour reduction started rampdown to 400A at 2A/30s.
8 hour conditioning to start at 16:15 pm
Friday, September 24, 2021, 00:16
TGHT= 399.8 A, 3.5V
IGP1= 2.4 e-06 Torr
Start ramp down at 2A/min
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