 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.
|
|
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
|
Wednesday, August 19, 2020, 07:49, Marla Cervantes, UO2/C, P2N-02, , Done, P2N carbothermal reduction (#2) 
|
Wednesday, August 19, 2020, 07:47
XRD analysis of the P2N material showed that the carbothermal reduction was not completed
The material was loaded again in its oven, new Ta caps where secured to the edges, the body remained the same
The oven was set in the EVAP1 using Ar to avoid oxidation of the P2N material
See elog 263
Wednesday, August 19, 2020, 07:47
Good vacuum 1e-1 Torr
Bad vacuum 5e-1 Torr
IGP1 = 4.11e-6 Torr
Autoramp set to 1A/10s to 150 A.
Wednesday, August 19, 2020, 10:00
TGHT = .45 V, 149.8 A
IGP1 = 9.1e-5 Torr
Autoramp set to 1A/10s to 200 A.
Wednesday, August 19, 2020, 10:13
TGHT = 0.6 V, 200.2 A
IGP1 = 3e-4 Torr and increasing
After 6 min:
good vacuum = 5e-2 Torr
bad vacuum = 1e-1 Torr
autoramp set to 1A/30s to 250 A
Since the pressure was decreasing, the ramp was changed to 1A/10s to 250 A, vacuum limits remained the same
Wednesday, August 19, 2020, 10:28
Good vacuum 1e-1 Torr
Bad vacuum 5e-1 Torr
IGP1 = 1.7e-4 Torr
TGHT = 0.78 V, 250.1 A
Autoramp set to 2.5 A/10 s to 700 A
Wednesday, August 19, 2020, 11:17
Good vacuum 1e-1 Torr
Bad vacuum 5e-1 Torr
IGP1 = 2e-4 Torr
TGHT = 2.64 V, 699 A
Autoramp set to 2 A/10 s to 800 A
Wednesday, August 19, 2020, 11:29
Good vacuum 1e-1 Torr
Bad vacuum 5e-1 Torr
IGP1 = 5.2e-5 Torr
TGHT = 3.1 V, 798.8 A
Note: Voltage starts to become unstable, an power is around 2.3 kW, pressure has not increased enough to indicate reduction with certainty
In order to reach 3 kW autoramp set to 1A/10 s to 900 A
Wednesday, August 19, 2020, 12:18
The current was increased to 1000 A expecting to see a high peak in pressure but there was not an increase in preasure.
The target is being ramped down to 850 A |
|
Tuesday, September 08, 2020, 20:45, Marla Cervantes, UO2/C, P2N-02, , Done, P2N-2 carbothermal reduction
|
Tuesday, September 08, 2020, 20:44
A P2N oven with three heat shields, loaded with a graphite container filled with UO2/C ring-discs was set in the EVAP1
EVAP1 is currently being evacuated.
Wednesday, September 09, 2020, 10:11
IGP1 = 4.7e-6 Torr
Good vacuum 1e-1 Torr
Bad vacuum 5e-1 Torr
Autoramp set to 1A/10s to 150 A.
Wednesday, September 09, 2020, 10:50
TGHT = .32 V, 149.8 A
IGP1 = 6.5e-5 Torr
Autoramp set to 1A/10s to 200 A
Wednesday, September 09, 2020, 11:00
TGHT =0.46 V, 200 A
IGP1 = 6e-4 Torr and going up
good vacuum = 5e-2 Torr
bad vacuum = 1e-2 Torr
autoramp set to 1A/10s to 250 A
autoramp stopped at 215 A, since pressure kept increasing, the current was manually decreased to 180 A.
Wednesday, September 09, 2020, 11:16
TGHT = 0.4 V, 179.7 A,
IGP1 = 8.5e-4 Torr an going down
good vacuum = 5e-2 Torr
bad vacuum = 1e-2 Torr
autoramp set to 1A/30s to 200 A
Wednesday, September 09, 2020, 11:32
TGHT = 0.46 V, 200.2 A,
IGP1 = 3e-3 Torr an going down
good vacuum = 5e-2 Torr
bad vacuum = 1e-2 Torr
autoramp set to 1A/30s to 300 A
Wednesday, September 09, 2020, 11:38
IGP1 = 1e-3 Torr
Since the pressure was decreasing, the ramp was stopped at 210 and changed to 1A/10s to 300 A, vacuum limits remained the same
Wednesday, September 09, 2020, 11:53
The pressure reached the bad vacuum limit 1e-2 Torr and stopped
After ~8min the pressure limits were changed to:
good vacuum = 5e-2 Torr
bad vacuum = 1e-1 Torr
Wednesday, September 09, 2020, 12:05
IGP1 = 1.15e-3 Torr
Autoramp set to 2.5 A/10 s to 700 A
Wednesday, September 09, 2020, 12:36
Pressure increased! and ramp paused at 685 A
re-started autoramp to 700 A at 1A/10s
Wednesday, September 09, 2020, 13:56
Pressure kept increasing after 700 A, so autoramp was set to 750 A at 1A/10s
Pressure kept increasing
At 750 A pressure started reducing, autoramp was set to 760 A at 1A/10 s
System tripped suddenly (Gelo was notified)
The carbothermal reduction seemed complete |
|
Thursday, September 10, 2020, 14:07, Marla Cervantes, UO2/C, P2N-02, , Done, P2N-2 Conditioning
|
Thursday, September 10, 2020, 14:01
A P2N target was carbothermal reduced but at the maximum current, the power supply tripped (elog. 267)
Therefore, the target was not hot long enough to fully outgas, that is why it will be reheated.
Desired current 650 A
Thursday, September 10, 2020, 14:07
IGP1 = 3.3e-6 Torr
Autoramp set to 650 A at 1 A/10 s
Thursday, September 10, 2020, 16:06
Ramp reached desired current
TGHT = 2.4 V, 649 A
IGP1 = 3e-3 Torr
Friday, September 11, 2020, 11:17
TGHT = 2.24 V, 649.2 A
IGP1 = 3.7e-6 Torr
Friday, September 11, 2020, 12:55
TGHT = 2.2 V, 648.8 A
IGP1 = 3.7e-6 Torr
Autoramp set to 700 A at 1 A/10 s,
No more gas was released, the system was ramped down to 0 A at 2 A/min
Friday, September 11, 2020, 18:17
TGHT = 0.35 V, 133 A
IGP1 = 2.7e-6 Torr
Friday, September 11, 2020, 20:01
TGHT = 0 V, 2.56 A
IGP1 = 2.6e-6 Torr
Monday, September 14, 2020, 16:19
EVAP1 was vented with Ar and the P2N material was transferred to the preparatory glove box. |
|
Tuesday, March 30, 2021, 16:04, Marla Cervantes, UO2/C, P2N-02, , Done, P2N-3 carbothermal reduction
|
Green target material characteristics (elog 105)
#discs = 49
Average disc thickness = 0.453mm
Empty cartridge weight = 9.42 g
Full cartridge weight = 39.86 g
UO2+C weight = 30.44 g
Tuesday, March 30, 2021, 16:04
The target material was loaded in a P2N oven, wrapped with three heat shields, and set in the EVAP1
EVAP1 is currently being evacuated.
Wednesday, March 31, 2021, 09:42
IGP1 = 3.24e-6 Torr
Good vacuum 1e-1 Torr
Bad vacuum 5e-1 Torr
Autoramp set to 1A/10s to 150 A.
Wednesday, March 31, 2021, 10:17
TGHT = .54 V, 149.88 A
IGP1 = 6.3e-4 Torr and increasing
Max pressure = 0.06 Torr
Wednesday, March 31, 2021, 10:33
IGP1= 0.004 Torr
Autoramp set to 1A/10s to 200 A
Wednesday, March 31, 2021, 10:43
Maximum pressure 0.03 Torr and going down
Autoramp set to 1A/10s to 250 A
Wednesday, March 31, 2021, 11:04
TGHT = 1.1 V, 299.9 A
IGP1 = 6e-4 Torr and going down
Autoramp set to 2.5 A/10 s to 700 A
Wednesday, March 31, 2021, 11:35
Ramp stopped at 690 A
TGHT = 2.9V, 689.1A
IGP1 = 0.127 Torr
Wednesday, March 31, 2021, 11:37
Autoramp set to 700 A at 1A/20s
Manually ramped to 740 A (3V) to make sure carbothermal reduction is done.
Wednesday, March 31, 2021, 12:00
The power supply tripped, Gelo was monitoring the heating process.
Wednesday, March 31, 2021, 14:33
The target will be heated for 4 hours to get read of impurities.
IGP1 = 6e-6 Torr
Autoramp set to 650 at 1A/10s
Wednesday, March 31, 2021, 20:37
TGHT = 2.77 V, 669.6A
IGP1 = 8.5e-6 Torr
EVAP1 ramped down to 0 A at 2 A/min |
|
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.
|
|
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
|
|
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 |
|
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
|
|
Wednesday, April 13, 2022, 10:55, Luca Egoriti, UC2, , P2N-SIS, Done, P2N carbothermal reduction P2Ncartridge-220323
|
Wednesday, April 13, 2022, 10:50
P2NC-220323
Preparing the P2N-UCx for online operation on June 2022
Two cartridges were filled with annular UO2/C foils last week.
48 cartridges total
Today, Darwin and I are placing one of the two cartridges in the EVAP1. The cartridge is P2NC-220323.
Thursday, April 14, 2022, 09:34
Carbothermal reduction heating process started with a ramp rate of 3 A/min
Pressure 1.8E-6T
Thursday, April 14, 2022, 10:31
Paused autoramp because pressure increasing too rapidly. Will continue ramp up once pressure stabilizes.
Thursday, April 14, 2022, 11:20
autoramp restarted @3A/min
IGP1=2.7E-4 Torr
Thursday, April 14, 2022, 13:24
After first major outgass finished and pressure trending down, increased autoramp to 5A/min to 600A
Thursday, April 14, 2022, 13:27
IGP1 = 3.3E-4A
TGHT = 600A, 2.5V
decrease ramp rate to 3A/min to 650A
Thursday, April 14, 2022, 13:45
Set autoramp to 670A
Thursday, April 14, 2022, 13:52
paused autoramp at 668A because pressure increase too steep.
Changed ramp rate to 0.5A/min and restarted ramp up to 700A
Thursday, April 14, 2022, 15:20
Continued increase in current towards 700A while pressure decrease indicated completeness of reduction.
Started rampdown to 650A.
Pressure was 1.7E-4 Torr on IGP1
Friday, April 15, 2022, 06:28
The current was reduced to 500A @ 3:50 PM yestesterday.
Currently, TGHT = 500A, 2.0V
started aurtoramp down @ -2A/min
IGP1= 2.4E-6 Torr
Monday, May 02, 2022, 12:32
Cartridge reloaded onto EVAP 1. Will heat back up to check carbothermal reduction.
Tuesday, May 03, 2022, 08:40
IGP1= 1.32e-6 Torr
Good vacuum 1e-1 Torr
Bad vacuum 5e-1 Torr
Autoramp set to 1A/10s to 500A
Autoramped up to 750A @ 1A/10s. Only slight pressure increases observed areound 150A and 650A to 700 A. Parameter curves will be evaluated.
Tuesday, May 03, 2022, 11:11
Started rampdown at -1A/10s.
IGP1 was 3.0e-5 Torr and trending down when rampdown started
|
|
Wednesday, May 04, 2022, 09:47, Luca Egoriti, UC2, , P2N-SIS, Done, P2N carbothermal reduction P2NC220408
|
Wednesday, May 04, 2022, 09:42
Yesterday, a second graphite cartridge was installed in EVAP1, it consists of the old, 3-body cartridge design, and was sanded on the outside to be able to fit a P2N container.
First I tried ramping manually, but the heating tripped because pressure was too high.
Then the parameters were set as previously, but it tripped again
IGP1= 2e-5 Torr
Good vacuum 8e-2 Torr
Bad vacuum 5e-1 Torr
Autoramp set to 1A/10s to 500A
Autoramped up to 700A @ 1A/10s.
Wednesday, May 04, 2022, 11:40
Another ramping trial, with different heating rate:
IGP1= 3e-5 Torr
Good vacuum 8e-2 Torr
Bad vacuum 5e-1 Torr
Autoramp set to 1A/20s to 700A
Autoramped up to 700A @ 1A/20s.
Wednesday, May 04, 2022, 15:50
IGP1= 3e-2 Torr
Good vacuum 8e-2 Torr
Bad vacuum 5e-1 Torr
Autoramp set to 1A/20s to 730A
Autoramped up to 720A @ 1A/20s.
Pressure dropping while current is increasing at autoramp rate.
Wednesday, May 04, 2022, 16:10
From 730A, once the pressure went down to ~1E-3T, the current was suddenly raised to 750A and 770A to see if significant pressure increase was noticed, but small bumps reaching 1.5E-3T were not considered a sign of further reduction.
The rampdown started from a pressure ~1E-3T, from 770A to zero with rate 2A/10s
|
|
Wednesday, June 01, 2022, 08:42, Darwin Ortiz Rosales, UO2/C, Target Boat, , Done, UO2 reduction Provisional ID C211209-1
|
Wednesday, June 01, 2022, 08:39
A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (previous day)
IGP1 = 1.6 e-6 Torr
Good vacuum = 5e-2 Torr
Bad vacuum = 5e-1 Torr
Current ramp is 1A per 10s from 0A to 40A then continue to 80A at 1A/10s. Then at 1A/min to 120 A and allow degas and then autoramp 1A/10s from 120A to (450-550A)
Wednesday, June 01, 2022, 09:51
IGP1= 3.0e-4 Torr
TGHT = 120A, 1.0V
Start autoramp at 1A/10s to 420A
Wednesday, June 01, 2022, 10:02
Increased ramp rate to 3A/10 s as per SOP to 440 A then will slow down the ramp to observe pressure behavior.
Wednesday, June 01, 2022, 10:19
At 430 A, autoramp set to 1A/10s to 500A as pressure was increasing.
Will observe behavior of pressure curve then leave for 4 hours
Wednesday, June 01, 2022, 11:04
Pressure started dropping at 520A. Stopped ramping and will leave for 4 hours.
Wednesday, June 01, 2022, 14:48
Autoramp to 400 A at 2A/30s and leave for 8 hour treatment
Wednesday, June 01, 2022, 23:00
IGP1= 2.1e-6 Torr
TGHT= 400A
Ramping down @-2A/min to 0A
Thursday, June 02, 2022, 10:09
IGP1= 6.7e-7 Torr
Ready to dismount |
|
Friday, June 03, 2022, 06:21, Darwin Ortiz Rosales, UO2/C, 42218-4, LP-IG-LIS, Done, UCx#39 reduction
|
Friday, June 03, 2022, 06:24
A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (previous day)
IGP1 = 1.4 e-6 Torr
Good vacuum = 5e-2 Torr
Bad vacuum = 5e-1 Torr
Current ramp is 1A per 10s from 0A to 80A at 1A/10s. Then at 1A/min to 120 A, allow degas and then autoramp 1A/10s from 120A to (450-550A)
Friday, June 03, 2022, 06:52
starting autoramp at 1A/min to 120A
Friday, June 03, 2022, 07:30
note*: At approximately 108A the pressure did not rise again but was stable.
Friday, June 03, 2022, 07:46
started autoramp at 1A/10s to 450A
Friday, June 03, 2022, 09:29
start autoramp to 500A at 1A/min
Friday, June 03, 2022, 09:40
pressure keeps stable as ramping continues.
increased ramp rate to 2A/min
Friday, June 03, 2022, 09:56
Drop in pressure observed as current increased at 2A/min.
Final current is 490A. Will keep at this current for 4 hours.
Friday, June 03, 2022, 14:05
Start auroramp to 400A at -2A/30s
will keep at 400A for 8 hours
Friday, June 03, 2022, 22:06
Start autoramp down at -2A/min to 0A
IGP1= 1.6e-06 Torr
TGHT= 400A, 3.6 V |
|
Tuesday, June 07, 2022, 07:09, Darwin Ortiz Rosales, UO2/C, Target Boat, , Done, UO2 reduction ID C220510-1
|
Tuesday, June 07, 2022, 07:05
A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (previous day)
IGP1 = 1.2 e-6 Torr
Good vacuum = 5e-2 Torr
Bad vacuum = 5e-1 Torr
Current ramp is 1A per 10s from 0A to 80A at 1A/10s. Then at 1A/min to 120 A and allow degas and then autoramp 1A/10s from 120A to (450-550A)
Tuesday, June 07, 2022, 08:28
IGP1=9.8e-5 Torr
TGHT = 120A, 0.85V
Start autoramp at 1A/10s to 420A
Tuesday, June 07, 2022, 08:45
Increased ramp rate to 3A/10 s as per SOP to 450 A then will slow down the ramp to observe pressure behavior.
Tuesday, June 07, 2022, 09:04
slowed autoramp to 2A/min to observe (1A/30s)
some erratic pressure oscillations observed then stabilized.
Tuesday, June 07, 2022, 09:32
At TGHT = 495A pressure started dropping even while current ramping up. Stopped ramp. Will keep for 4 hours.
TGHT = 495.6A, 4.7V
Tuesday, June 07, 2022, 13:30
TGHT = 495.6 A, 4.7V
IGP1= 8.5 e-6 Torr
Start rampdown to 400A at 2A/30s and leave for 8 hour treatment
|
|
Friday, October 07, 2022, 08:14, Darwin Ortiz Rosales, UO2/C, , LP-SIS, Done, C-220928UCx conditioning experiments
|
Friday, October 07, 2022, 07:55
Cartridge-220928UCx was installed in the EVAP1 and pumped down yesterday.
Material will be reduced in LP-SIS wrapped with 3 Ta foils.
IGP1 = 2.1e-6 Torr
a cap was installed to collect material coming out from the ionizer tube
The initial weight of the cap 1 + small bag was recorded to be: 2.82 g Final weight of cap1 + small bag = 2.84g (see attached picture)
Good vacuum = 5e-4 Torr
Bad vacuum = 5e-2 Torr
Power desired 1900W as approximate power used online.
Will autoramp @2A/min to 30A, then slow down ramp to 1A/min to 120A.
After first pressure bump cleared, will ramp up to 400 A @ 2A/20s to 425A on TGHT. TBHT will be topped off at 230A.
from 425A, TGHT will be ramped at 1A/min and monitored for pressure behaeviour.
sytem will be left at reduction current for 4 hours. Then, the current will be dropped to 1900W and allow to run for 8 hours.
The cup will be collected and the system will be run again in increments of two hours.
*slight change from test plan to save time*
Friday, October 07, 2022, 21:55
A true pressure max was not observed. A max while current still rising. stopped at 560A on TGHT and 5.3V
will leave at the above conditions for 4 hours.
Suspect that the thinner Ta shields make a difference. Suggest to add a fourth shield and process the previous cartridge in a tube rather than a boat. Treat for four hours (pressure max) and then test increasing the current to see if there is a pressure bump. If no pressure bump then lower current to deposit 1900W for 8 additional hours.
After 4 hours at max current, the current was dropped to 450A (TGHT) and left for 8 hours.
Saturday, October 08, 2022, 09:26
start autoramp down @-2A/min for TGHT and -1A/min for TBHT
Cap+ bag = 2.82 g
final cap +bag = 2.84 g
Tuesday, October 11, 2022, 10:15
Today will switch end-cup. Will weigh new end-cup and place inside the evap1 glovebox. Then will remove used end-cap and install new end-cap. Used end-cup will be weighed on same balance as before. All mass measurements will be done with the same balance. Note, that a makeshift balance air isolation container was built to allow balance to not be affected by air currents.
Cap 2+bag initial weight = 2.80 g +/- 0.01 g
Cap 2+bag final weight = 2.81g +/- 0.01 g
No visible deposition on cap
Wednesday, October 12, 2022, 07:51
Start ramp up at 2A/min. TGHT to 450A, TBHT to 230A
IGP1= 6.7e-07Torr
Wednesday, October 12, 2022, 09:47
Ramping up @ 4A/min to same final settings: TGHT = 450A and TBHT = 230A
Wednesday, October 12, 2022, 11:15
@10:45am 450A, 4.15V were reached on TGHT
Will leave for 2 hours at 450A then ramp down, then switch cap.
Monday, October 17, 2022, 09:40
The second cap was taken out over the weekend (attachment number 2).
The final weight of this cap with bag = 2.81 +/- 0.01 g
Installed a nex cap (3) with initial weigh of cap +bag = 2.74 g
Allowed vacuum to settle over Sunday and will start ramping today
Will ramp to 470 A and hold for 2 hours. Ramp rate 2A /30s
IGP1= 4.6e-07 Torr
Monday, October 17, 2022, 11:39
ramping with no issues. will finish ramp around 12:03 pm and will start rampdown @ around 2:05 pm.
Monday, October 17, 2022, 12:03
TGHT= 470A, 4.5V
TBHT= 228A, 2.9V
IGP1= 5.6e-06 Torr
Monday, October 17, 2022, 14:05
Start rampdown at 2A/min TGHT and 1A/min TBHT to zero amp
current IGP1= 2.6e-06 Torr
TGHT = 470A, 4.5V
TBHT= 228.3A, 2.9V
Tuesday, October 18, 2022, 09:39
IGP1=4.4e-7 Torr
ready to dismount
Tuesday, October 18, 2022, 13:50
Cap 3 + bag initial weight = 2.74 g
Final weight of cap+bag = 2.74 g (no change)
no visible deposition on cap either |
|
Wednesday, October 19, 2022, 12:28, Darwin Ortiz Rosales, UC2, 40253-5, LP TUBE, Done, C-220510 further conditioning
|
Wednesday, October 19, 2022, 10:27
Cartridge-220510Cx was installed in the EVAP1 and pumped down yesterday.
Material will be further conditioned at 450A for 4 hours.
The material will be conditioned inside a container tube with both ends open at the ends. Two springs are inserted at the ends of the graphite cartridge to contain the material as graphite caps not inserted.
IGP1 = 7.8e-07 Torr
Good vacuum = 5e-4 Torr
Bad vacuum = 5e-2 Torr
Will autoramp @2A/30s (4A/min) to 40 A and then to 120A. Fast ramp rate because material had previously been conditioned
Wednesday, October 19, 2022, 12:23
TGHT 450A, 5.2 V
Will leave for 4 hours and then begin ramp-down.
Wednesday, October 19, 2022, 16:21
IGP1= 3.1e-06Torr
450A, 5.2V
Start rampdown @- 2A/min
Thursday, October 20, 2022, 09:23
IGP1= 4.6e-7 Torr
|
|
Monday, November 28, 2022, 05:59, Darwin Ortiz Rosales, UO2/C, , LP-SIS, Done, C221125experiment
|
Monday, November 28, 2022, 05:58
Left weekend to pump down
current IGPI= 7.23e-7 Torr
Material will be reduced in LP-SIS wrapped with 3 Ta foils.
a cap was installed to collect material coming out from the ionizer tube
Initial weight of target material plus cartridge was recorded
All relevant data and findings will be reported and added to docushare as document :
Good vacuum = 5e-4 Torr
Bad vacuum = 5e-2 Torr
Power desired 1900W as approximate power used online.
Will autoramp @2A/min to 30A, then slow down ramp to 1A/min to 120A.
After first pressure bump cleared, will ramp up to 400 A @ 2A/20s to 425A on TGHT. TBHT will be topped off at 230A.
from 425A, TGHT will be ramped at 1A/min and monitored for pressure behaeviour.
sytem will be left at reduction current for 4 hours. Then, the current will be dropped to 425 A and allow to run for 8 hours.
The cup will be collected and the system will be run again for two hours. at the same current until no material visible on cap. Then it will be run at 450A for increments of two hours until no significant mass change of target material.
Monday, November 28, 2022, 06:05
started initial heating to 30A at 2A/min on both TGHT and TBHT.
Monday, November 28, 2022, 08:46
was ramping at 6A/min (2A/20s) on both tGHT and TBHT but aborted due to pressure spike. will allow pressure to stabilize.
TGHT = 162A, 1.35V
TBH 162A, 1.9V
Monday, November 28, 2022, 08:51
Restarting the heating at 6A/min (2A/20s)
Monday, November 28, 2022, 09:21
Pausing heating @ TGHT= 323 A 3.0V
Allow pressure to stabilize to better spot reduction current
Monday, November 28, 2022, 09:49
Started heating TGHT at 2A/min so reduction current can be better resolved
Monday, November 28, 2022, 10:12
heating aborted to allow pressure to stabilize
IGP1> 5.0e-4 Torr
Monday, November 28, 2022, 11:31
IGP1= 1.5e-4 Torr start autoramp TGHT @1A/min
Monday, November 28, 2022, 11:51
paused heating. Second peak has been passed. Will let pressure drop before starting heating again to try and better observe reduction peak.
Monday, November 28, 2022, 12:46
start autoramp at 2A/min from 389A on TGHT
IGP1- 6.4e-6 Torr
Monday, November 28, 2022, 14:21
Pressure starts to drop at around 535A, but large bump observed around 386A.
Will leave four hours.
TGHT= 539A, 4.98V
TBHT= 229A, 2.9V
Monday, November 28, 2022, 18:19
Ramping down at 4A/min to 425A
Currently IGP1= 6.2e-6 Torr
TGHT = 539A, 4.98 V
TBHT= 230A, 2.98V
Monday, November 28, 2022, 22:23
425 A on TGHT reached at 6:50 pm. Will ramp down at 2:50 am . -2A/min TGHT and -1A/min TBHT
Tuesday, November 29, 2022, 09:34
Final IGP1 when TGHT and TBHT = 0A is 5.0e-7 Torr
Tuesday, November 29, 2022, 14:08
Weighed materials and reloaded
Currently at 1.1 e-05 Torr
Will initiate heat ramp at 2A/min to 425 A
@241A increase ramp rate to 4A/min on TGHT
Wednesday, November 30, 2022, 12:44
heating B finished and cartridge loading for heating C
Current pressure = 2.09 E-05 Torr. Will ramp up to 450A at 4A/min and regulate as needed.
Will heat at 450A TGHT for 2 hours, TBHT max= 230A
Wednesday, November 30, 2022, 16:30
Starting rampdown @-2A/min TGHT and -1A/min TBHT
Final heating was @ 450A, 4.0V TGHT and 230A, 2.7V TBHT
Friday, December 02, 2022, 09:00
IGP1= 7.2 e-07 Torr
Starting ramp at 2A/min to 450A on TGHT and 230A on TBHT
Friday, December 02, 2022, 10:02
pressure stated dropping. Will increase ramp to 4A/min (2A/30s)
Friday, December 02, 2022, 15:35
Starting ramp down at -2A/min TGHT and -1A/min TBHT
IGP1= 2.6 e-06 Torr
TGHT 450A 4.2V
TBHT 230A 2.9V
|
|
Monday, December 19, 2022, 10:45, Darwin Ortiz Rosales, UO2/C, , LP TUBE, Done, C-221207 Reduction
|
Monday, December 19, 2022, 10:38
Cartridge with 175 discs (including 5 analysis discs) loaded into a graphite cartridge.
To be reduced inside a Ta container tube. Tube wrapped in 3 Ta foil heatshields
Will keep at reducing current for 4 hours and then 10 hours @ 425A
Good Vacuum: 5.0e-04 Torr
Bad Vacuum: 5.0e-02 Torr
Initial pressure was 6.36 e-07 Torr
Autoramped to 56A @ 1A/30s
Outgassing bump observed starting at 50A and at 56A the maximum pressure was ~1.9e-05 Torr
Monday, December 19, 2022, 10:47
started autoramping at 1A/30s to 90A
Monday, December 19, 2022, 10:50
observed that pressure not increasing radically, therefore ramping up faster. 2A/30s
Monday, December 19, 2022, 10:58
Second pressure bump observed at 90A, 1.0V
leaving at this current until pressure drops
Monday, December 19, 2022, 17:15
ramped to 280A and left at 280 until pressure started dropping
ramping again to 500A @ 2A/30s
Monday, December 19, 2022, 17:26
Stopped at 330A due to pressure hike. Will allow pressure to drop then continue ramp.
Monday, December 19, 2022, 18:00
restarting ramp @ 2A/30s
Monday, December 19, 2022, 18:11
Pressure started dropping around 350A corresponding to additive gas-off. Will rampt to 500A @ 2A/30 seconds and then at 1A/30s to 530A
Final current was 548A, 6.7 V. Will test increasing current after 4 hours (11 pm)
Monday, December 19, 2022, 23:10
ramping down @ 2A/min to 425A . should be done by 12:00 am and cooling at9:00 am (includes 1 hour ramp down to 425).
Ramping down to zero @ -2A/min
Wednesday, December 21, 2022, 10:47
Final IGP1= 3.7e-07 Torr |
|
Thursday, January 19, 2023, 10:02, Darwin Ortiz Rosales, UO2/C, , LP TUBE, Done, C230105 Reduction
|
Thursday, January 19, 2023, 09:57
Cartridge #8 loaded with 198 discs
To be reduced inside a Ta container tube. Tube wrapped in 3 Ta foil heatshields.
Reduction for 4 hours and then 10 hours @ 425A
Good Vacuum: 5.0e-04 Torr
Bad Vacuum: 5.0e-02 Torr
Initial pressure is 1.41e-06 Torr
Thursday, January 19, 2023, 10:02 Auto ramping to 120A @ 1A/min
Thursday, January 19, 2023, 18:58
Autoramping to 300A @ 4/min (2A/30s)
IGP1=3.34e-06 Torr
Friday, January 20, 2023, 07:37
left at 300 A for 8 hours and pressure dropped. Restarted autoramp at 2A/30s and pressure was increasing until 425A where it peaked. Reduced autoramp to 1A/min and observed slow but definite pressure drop. Will go to 450A and leave there for 4 hours.
Currently 440A, 5.3V on TGHT and 1.28e-05 Torr on IGP1
Friday, January 20, 2023, 12:06
After 4 hours at 450A IGP1= 3.49e-06 Torr
TGHT = 450A 5.4V
Will drop to 425A and leave for 10 hours
Friday, January 20, 2023, 21:53
TGHT 425A, 5.2V
IGP1= 1.81e-06 Torr
autoramping to 0 A @ -2A/min |
|