# R1S5 SL2 BurnIn

 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

# 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