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| Evaporator_2 |
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 Friday, August 10, 2012, 19:57, Nikita Bernier, , , , Done, Sintering Ta foil with TaO coating
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 Saturday, August 11, 2012, 19:21, Nikita Bernier, , , , Done, Sintering Ta foil with TaO coating 
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Monday, August 13, 2012, 13:50, Nikita Bernier, , , , Done, Sintering Ta foil with TaO coating
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Tuesday, August 14, 2012, 17:11, John Wong, , , , Failed, Sintering Ta2O5 coating on Ta foil failed
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Message ID: 41
Entry time: Monday, August 13, 2012, 13:50
In reply to: 40
Reply to this: 44
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| Author: |
Nikita Bernier |
| Target Material: |
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| Target Oven W.O#: |
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| Source: |
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| Status: |
Done |
| Subject: |
Sintering Ta foil with TaO coating |
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| Nikita Bernier wrote: |
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| Nikita Bernier wrote: |
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Friday, August 10, 2012, 19:54
Target boat with TaC coating, inside covered with a 0.002 inches thick Ta foil, wrapped with a 0.002 inches thick Ta foil, contains a Ta foil with TaO coating.
See John's Ipad for their recipes.
Evaporator #2 is now auto-ramping overnight at 0.2 A/min, up to 830 A, with the maximum voltage limited at 14 V, between 2.00e-05 (Good vacuum) and 3.00e-05 Torr (Bad vacuum).
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Saturday, August 11, 2012, 19:15
Heating process was going smoothly up to 400 A. See Attachment 1.
Around 420 A, vacuum went up again and the voltage increased more quickly. It seems like resistance is building up. After reaching 530 A, the current was tapped down to 420 A in an effort to save the Ta boat. See Attachment 2.
The current will stay at 420 A for the weekend until John takes a look at this.
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Monday, August 13, 2012, 13:46
TGHT was ramped down at 2 A/min and then tapped down to 0A. See Attachment 1. The target boat will be cooled down for about an hour before turning off the chiller.
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