| 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 |
|
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 10 volts at a time
| 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 |
|