Difference between revisions of "R1S5 SL2 BurnIn"
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|06/18/13 || 15:00 || 536 || 1750 || -500 || 5.2 || 5.3 || no voltage to HVB1,HVB3,and HVB7 | |06/18/13 || 15:00 || 536 || 1750 || -500 || 5.2 || 5.3 || no voltage to HVB1,HVB3,and HVB7 | ||
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| − | |06/26/13 || 17: || 536 || 1500 || -750 || 4.6 || 4.3 || Switched to SL2 Kraken HV after burning in SL1 HVB1 with Octopus. SL1 HVB1 burned down to about 1 microamp over ~24 hrs after starting at a high of 4 microamps. This is the | + | |06/26/13 || 17: || 536 || 1500 || -750 || 4.6 || 4.3 || Switched to SL2 Kraken HV after burning in SL1 HVB1 with Octopus. SL1 HVB1 burned down to about 1 microamp over ~24 hrs after starting at a high of 4 microamps. When setting up HVB1 for burn-in, noticed a grounding strap attached to the board that caused high guard current even at 30V. Removed the strap and this problem was resolved, burn-in proceeded normally. This is the reading on SL2 + Kraken immediately after reaching 1500V on sense. |
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Revision as of 23:42, 26 June 2013
| Date | Time (24h) | Guard (V) | Sense (V) | Field (V) | Sense (A) | Field (A) | comments |
| 05/28/13 | 14:08 | 100 | 100 | -100 | 0.02 | 0.00 | Confirmed with initial setting of 30/40/50V that there are no crossed connections between wire types and that voltage supply is connected correctly. |
| 05/28/13 | 16:34 | 536 | 1500 | -750 | 45.5 | 45.5 | Someone upped the voltage to full the full operating level without recording it. This is the current reading right now. |
| 05/28/13 | 17:56 | 536 | 1500 | -750 | 41.5 | 41.6 | |
| 05/29/13 | 07:56 | 536 | 1500 | -750 | 22.5 | 22.6 | |
| 05/29/13 | 15:02 | 536 | 1500 | -750 | 17.9 | 18.0 | |
| 05/29/13 | 18:07 | 536 | 1500 | -750 | 16.7 | 16.8 | |
| 05/30/13 | 07:55 | 536 | 1500 | -750 | 10.6 | 10.7 | |
| 05/30/13 | 12:51 | 536 | 1500 | -750 | 9.5 | 9.6 | |
| 05/30/13 | 17:23 | 536 | 1500 | -750 | 8.7 | 8.8 | |
| 06/03/13 | 08:23 | 536 | 1500 | -750 | 1.7 | 1.8 | |
| 06/04/13 | 07:42 | 536 | 1500 | -750 | 1.4 | 1.5 | |
| 06/05/13 | 12:01 | 536 | 1500 | -750 | 1.8 | 1.9 | had to turn off HV to organize cables |
| 06/05/13 | 17:56 | 536 | 1500 | -750 | 1.8 | 1.9 | |
| 06/06/13 | 07:56 | 536 | 1500 | -750 | 1.8 | 1.9 | seem to be stuck at this current draw? |
| 06/10/13 | 17:29 | 536 | 1500 | -750 | 1.5 | 1.6 | I think we ran out of gas on the weekend, the windows were deflated a bit but now they deflected outward |
| 06/11/13 | 07:50 | 536 | 1500 | -750 | 3.2 | 3.3 | current doubles? Humidity dropped from 40 to 25%. |
| 06/12/13 | 13:39 | 536 | 1500 | -750 | 3.6 | 3.7 | Humidity rose from 25 to 40%. |
| 06/13/13 | 11:00 | 536 | 1500 | -750 | 4.5 | 4.6 | Humidity is 40 +/- 5 %. |
| 06/14/13 | 08:56 | 536 | 1500 | -750 | 3.5 | 3.6 | |
| 06/17/13 | 07:58 | 536 | 1500 | -750 | 3.6 | 3.7 | |
| 06/24/13 | 08:37 | 536 | 1500 | -750 | 4.5 | 4.6 | turned off HV since 6/17/13 but continued flowing gas |
| 06/24/13 | 10:05 | 536 | 1500 | -750 | 5.14 | 5.24 | |
| 06/24/13 | 12:46 | 536 | 1500 | -750 | 5.10 | 4.99 | |
| 06/25/13 | 10:36 | 536 | 1500 | -750 | 4.7 | 4.7 |
Why is the current increasing?
is the current going to ground ?
Try raising the sense to 1750 and lowering the field to 500 (same voltage difference), and see if the sense current still equals the field current - want to know if the current is inside the chamber from wire to wire or if it's a current to ground, for example ...
If current is from field to sense:
if it is current from field to sense the current should increase exponentially with voltage, doubling with 100V increase; i.e. 2250 -> 2350. You could check to see if this is the case. If so, you could then try to locate where the problem is: which wire(s) are responsible?
Increasing Sense
| Date | Time (24h) | Guard (V) | Sense (V) | Field (V) | Sense (A) | Field (A) | comments |
| 06/17/13 | 12:20 | 536 | 1510 | -750 | 8 | 8.1 | |
| 06/17/13 | 12:16 | 536 | 1520 | -750 | 10.7 | 10.8 | |
| 06/17/13 | 12:34 | 536 | 1530 | -750 | 22.3 | 22.4 | |
| 06/17/13 | 12:43 | 536 | 1540 | -750 | 37.3 | 37.4 | |
| 06/17/13 | 15:53 | 536 | 1540 | -750 | 45.2 | 45.3 | |
| 06/17/13 | 15:55 | 536 | 1550 | -750 | 54.9 | 55.1 |
Lower the field to -500 V
| Date | Time (24h) | Guard (V) | Sense (V) | Field (V) | Sense (A) | Field (A) | comments |
| 06/17/13 | 15:55 | 536 | 1550 | -750 | 54.9 | 55.1 | |
| 06/17/13 | 15:58 | 536 | 1550 | -740 | 45.9 | 46.1 | |
| 06/17/13 | 15:59 | 536 | 1550 | -730 | 37.6 | 37.9 | |
| 06/17/13 | 14:00 | 536 | 1550 | -710 | 24.2 | 24.3 | |
| 06/17/13 | 14:02 | 536 | 1550 | -690 | 13.9 | 14.0 | |
| 06/17/13 | 14:03 | 536 | 1550 | -650 | 3.8 | 3.9 | |
| 06/17/13 | 14:04 | 536 | 1550 | -600 | 1.33 | 1.41 | |
| 06/17/13 | 14:05 | 536 | 1550 | -550 | 0.88 | 0.97 | |
| 06/17/13 | 14:06 | 536 | 1550 | -500 | 0.66 | 0.74 |
Increase sense when Field is at -500 V
| Date | Time (24h) | Guard (V) | Sense (V) | Field (V) | Sense (A) | Field (A) | comments |
| 06/17/13 | 14:06 | 536 | 1550 | -500 | 0.66 | 0.74 | |
| 06/17/13 | 14:10 | 536 | 1650 | -500 | 1.5 | 1.6 | |
| 06/17/13 | 14:13 | 536 | 1750 | -500 | 16.2 | 16.3 |
SL2 current draw search
| Date | Time (24h) | Guard (V) | Sense (V) | Field (V) | Sense (A) | Field (A) | comments |
| 06/18/13 | 08:57 | 536 | 1550 | -550 | 0.59 | 0.69 | no voltage to HVB1 |
| 06/18/13 | 09:00 | 536 | 1550 | -500 | 0.46 | 0.55 | no voltage to HVB1 |
| 06/18/13 | 09:12 | 536 | 1650 | -500 | 1.1 | 1.2 | no voltage to HVB1 |
| 06/18/13 | 09:17 | 536 | 1750 | -500 | 9.5 | 9.6 | no voltage to HVB1, less current measured |
| 06/18/13 | 10:31 | 536 | 1550 | -500 | 0.32 | 0.42 | no voltage to HVB1 and HVB2 |
| 06/18/13 | 10:40 | 536 | 1650 | -500 | 1.0 | 1.1 | no voltage to HVB1 and HVB2 |
| 06/18/13 | 10:45 | 536 | 1750 | -500 | 8.8 | 8.9 | no voltage to HVB1 and HVB2 |
| 06/18/13 | 11:07 | 536 | 1550 | -500 | 0.32 | 0.42 | no voltage to HVB1 and HVB3 |
| 06/18/13 | 11:11 | 536 | 1650 | -500 | 1.0 | 1.1 | no voltage to HVB1 and HVB3 |
| 06/18/13 | 11:16 | 536 | 1750 | -500 | 6.8 | 6.9 | no voltage to HVB1 and HVB3 |
| 06/18/13 | 11:31 | 536 | 1550 | -500 | 0.34 | 0.43 | no voltage to HVB1,HVB3,and HVB4 |
| 06/18/13 | 11:34 | 536 | 1650 | -500 | 0.82 | 0.92 | no voltage to HVB1,HVB3,and HVB4 |
| 06/18/13 | 11:38 | 536 | 1750 | -500 | 5.0 | 5.1 | no voltage to HVB1,HVB3,and HVB4 negligible effect |
| 06/18/13 | 12:12 | 536 | 1550 | -500 | 0.34 | 0.42 | no voltage to HVB1,HVB3,and HVB5 |
| 06/18/13 | 12:15 | 536 | 1650 | -500 | 0.89 | 0.97 | no voltage to HVB1,HVB3,and HVB5 |
| 06/18/13 | 12:19 | 536 | 1750 | -500 | 4.9 | 5.0 | no voltage to HVB1,HVB3,and HVB5 negligible effect |
| 06/18/13 | 14:08 | 536 | 1550 | -500 | 0.0 | 0.055 | no voltage to HVB1,HVB3,and HVB6 |
| 06/18/13 | 14:24 | 536 | 1650 | -500 | 0.2 | 0.27 | no voltage to HVB1,HVB3,and HVB6 |
| 06/18/13 | 14:30 | 536 | 1750 | -500 | 4.5 | 4.6 | no voltage to HVB1,HVB3,and HVB6 |
| 06/18/13 | 14.50 | 536 | 1550 | -500 | 0.335 | 0.420 | no voltage to HVB1,HVB3,and HVB7 |
| 06/18/13 | 14:53 | 536 | 1650 | -500 | 0.965 | 1.035 | no voltage to HVB1,HVB3,and HVB7 |
| 06/18/13 | 15:00 | 536 | 1750 | -500 | 5.2 | 5.3 | no voltage to HVB1,HVB3,and HVB7 |
| 06/26/13 | 17: | 536 | 1500 | -750 | 4.6 | 4.3 | Switched to SL2 Kraken HV after burning in SL1 HVB1 with Octopus. SL1 HVB1 burned down to about 1 microamp over ~24 hrs after starting at a high of 4 microamps. When setting up HVB1 for burn-in, noticed a grounding strap attached to the board that caused high guard current even at 30V. Removed the strap and this problem was resolved, burn-in proceeded normally. This is the reading on SL2 + Kraken immediately after reaching 1500V on sense. |
Sense Field difference constant
Change sense and field wire voltage but keep the difference 2350 Volts. Record currents over a time interval of minutes. Don't wait long.