R1S5 SL2 BurnIn

Date	Time (24h)	Guard (V)	Sense (V)	Field (V)	Sense ([math]\mu[/math]A)	Field ([math]\mu[/math]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

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 ([math]\mu[/math]A)	Field ([math]\mu[/math]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 ([math]\mu[/math]A)	Field ([math]\mu[/math]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 ([math]\mu[/math]A)	Field ([math]\mu[/math]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 ([math]\mu[/math]A)	Field ([math]\mu[/math]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