CLAS12 R1 S6 QA

HV Burn-in Procedure

1. Set current trip threshold to 10 [math]\mu[/math]A on the HV supply

2. Set Voltage to 50 volts on all channels. Probe HVB to be sure that all sense, field, and guard wires have a voltage.

3. Using a ramp speed of 5 V/s, set the HV on the supply to the following:

G:F:S= 525,-700, 700

Monitor the current, make sure there is not an excessive current draw (1+ [math]\mu[/math]A)

Final operating voltage settings range from

G:F:S = (525, -700, 1400) to (536, -700, 1500)

4. Increase the voltage on the sense wire in steps (step-size may change as needed, depending on current draw) and record the initial current draw when the voltage setting on the HV supply is reached on the wire. Allow the field and sense wire current draw to decrease to <1.0 [math]\mu[/math]A before increasing voltage.

If the HV supply trips due to excessive current draw when increasing the voltage, record that the voltage setting caused a trip condition and change the voltage setting using a smaller step-size from the last working voltage that drew <1.0 [math]\mu[/math]A.

As of 2/26/13, we have observed that initially starting at 700V on the sense wire, then jumping to 1000V does not result in excessive current. The "border region" of 1100-1200V and up may require smaller step sizes (20-50V at a time) to avoid exceeding 10 [math]\mu[/math]A current draw.

SL2-HVB1

Guard current is typically below 0.01 microAmp

Date	Guard	Field	Sense	I_{Sense}	I_{Field}	Time
	Volts	Volts	Volts	[math]\mu[/math] A	[math]\mu[/math] A
2/20/13	525	-700	1400	0.5	0.7	22:50

SL2-HVB2

Guard current is typically below 0.01 microAmp

Date	Guard	Field	Sense	I_{Sense}	I_{Field}	Time
	Volts	Volts	Volts	[math]\mu[/math] A	[math]\mu[/math] A
2/20/13	525	-700

Sector 6 - Serial Numbers on STB & HVB
	Top Endplate		Bottom Endplate
Board # (nose=1, tail=7)	SL1 (STB)	SL2 (HVB)	SL1 (HVB)	SL2 (STB)
1	G1202270	?	?	K1202516
2	G1202266	?	?	J1202341
3	G1202273	?	?	J1202339
4	G1202275	?	?	K1201716
5	G1202271	?	?	K1201717
6	G1202274	?	?	K1201719
7	G1202272	?	?	K1202346

HV Burn-in Log
Date	Time (24h)	HV Board ID	Guard (V)	Field (V)	Sense (V)	Sense ([math]\mu[/math]A)	Field ([math]\mu[/math]A)	comments
02/23/13	14:00	S6 SL2 HVB1	525	-700	700	2.2
02/23/13	14:20	S6 SL2 HVB1	525	-700	1400	8.3
02/23/13	14:24	S6 SL2 HVB1	525	-700	1400	5.145
02/23/13	14:27	S6 SL2 HVB1	500	-500	500
02/23/13	14:28	S6 SL2 HVB1	500	?	700	0
02/23/13	14:41	S6 SL2 HVB1	525	-525	525
02/23/13	14:41	S6 SL2 HVB1	525	-700	700
02/23/13	14:49	S6 SL2 HVB1	525	-700	1400	.5	.7
02/23/13	15:50	S6 SL2 HVB1	525	-700	1450	.8	.775
02/23/13	15:52	S6 SL2 HVB1	525	-700	1400	.465	.465
02/23/13	17:25	S6 SL2 HVB1	536	-700	1500	.720
02/25/13	17:05	S6 SL2 HVB7	536	-500	550	.08	.075
02/25/13	17:15	S6 SL2 HVB7	536	-700	700	.08	.01
02/25/13	17:18	S6 SL2 HVB7	536	-700	1000	.12	.05
02/25/13	17:21	S6 SL2 HVB7	536	-700	1000	.345
02/25/13	17:24	S6 SL2 HVB7	536	-700	1200	8.9		almost tripped
02/25/13	17:26	S6 SL2 HVB7	536	-700	1100	1.85
02/25/13	17:31	S6 SL2 HVB7	536	-700	1200	8.6		Almost lowered voltage but it's decreasing
02/25/13	17:34	S6 SL2 HVB7	536	-700	1200	7.3
02/25/13	17:38	S6 SL2 HVB7	536	-700	1200			tripped
02/25/13	17:38	S6 SL2 HVB7	536	-700	1150	2.85
02/25/13	17:55	S6 SL2 HVB7	536	-700	1150	1.04		Powered down at end of day (18:00)
02/26/13	14:25	S6 SL2 HVB7	536	-500	500	0	0.01
02/26/13	14:30	S6 SL2 HVB7	536	-700	700	0	0.035
02/26/13	14:33	S6 SL2 HVB7	536	-700	1000	0.3	0.38
02/26/13	14:33	S6 SL2 HVB7	536	-700	1100	0.7	0.785
02/26/13	14:45	S6 SL2 HVB7	536	-700	1150	0.93	1.05
02/26/13	14:54	S6 SL2 HVB7	536	-700	1200			trip
02/26/13	14:58	S6 SL2 HVB7	536	-700	1170	1.020	1.115
02/26/13	15:51	S6 SL2 HVB7	536	-700	1180	1.00	1.090
02/26/13	15:58	S6 SL2 HVB7	536	-700	1190	1.04	1.135
02/26/13	16:35	S6 SL2 HVB7	536	-700	1200	1.01	1.09
02/26/13	16:38	S6 SL2 HVB7	536	-700	1200	Tripped
02/26/13	16:39	S6 SL2 HVB7	536	-700	1190
02/26/13	16:48	S6 SL2 HVB7	536	-700	1193	0.915	1.005
02/26/13	16:50	S6 SL2 HVB7	536	-700	1196	Tripped
02/26/13	16:50	S6 SL2 HVB7	536	-700	1195	Tripped
02/26/13	16:57	S6 SL2 HVB7	536	-700	1194	0.920	1.015
02/26/13	17:03	S6 SL2 HVB7	536	-700	1194	Tripped
02/26/13	17:10	S6 SL2 HVB7	536	-700	1190	0.89	0.965
02/26/13	17:26	S6 SL2 HVB7	536	-700	1190	0.89	0.975
02/26/13	17:53	S6 SL2 HVB7	536	-700	1195
02/26/13	17:53	S6 SL2 HVB7	536	-700	1196	0.86
02/26/13	17:54	S6 SL2 HVB7	536	-700	1199	0.88	0.96
02/26/13	17:56	S6 SL2 HVB7	536	-700	1299			Tripped when sense got to ~1230V
02/26/13	17:58	S6 SL2 HVB7	536	-700	1199	2.055	2.135	Current trip threshold changed to 50 [math]\mu[/math]A. Upping voltage setting by a few volts at a time results in temporary (~1-2sec) spike to 30 [math]\mu[/math]A and settles back to a lower current around 2-4 [math]\mu[/math]A.
02/26/13	18:04	S6 SL2 HVB7	536	-700	1220	2.7	2.8
02/26/13	18:06	S6 SL2 HVB7	536	-700	1200	Tripped

Pre-Potting Tension Error

MYSQL commands

mysql> show databases;

+--------------------+
| Database           |
+--------------------+
| information_schema | 
| mysql              | 
| region1            | 
| test               | 
+--------------------+
4 rows in set (0.02 sec)

mysql> use region1;

Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed

mysql> show tables;

+-------------------------------+
| Tables_in_region1             |
+-------------------------------+
| R1S1_Tension_Trend_Test_Field | 
| R1S1_Tension_Trend_Test_Sense | 
| R1S4_Tension_Trend_Test_Field | 
| R1S4_Tension_Trend_Test_Sense | 
| R1S5_Tension_Trend_Test_Field | 
| R1S6_Tension_Trend_Test_Field | 
| R1S6_Tension_Trend_Test_Sense | 
| R1_SL1_S1_Field               | 
| R1_SL1_S1_Sense               | 
| R1_SL1_S4_Field               | 
| R1_SL1_S4_Sense               | 
| R1_SL1_S5_Field               | 
| R1_SL1_S6_Field               | 
| R1_SL1_S6_Sense               | 
| R1_SL2_S1_Field               | 
| R1_SL2_S1_Sense               | 
| R1_SL2_S4_Field               | 
| R1_SL2_S4_Sense               | 
| R1_SL2_S5_Field               | 
| R1_SL2_S6_Field               | 
| R1_SL2_S6_Sense               | 
| R1_particleCounts             | 
| R1_work_log                   | 
+-------------------------------+
23 rows in set (0.00 sec)

mysql> describe R1_SL1_S6_Sense;

+------------------+-------------+------+-----+-------------------+-------+
| Field            | Type        | Null | Key | Default           | Extra |
+------------------+-------------+------+-----+-------------------+-------+
| iCol             | int(11)     | NO   |     | NULL              |       | 
| iRow             | int(11)     | NO   |     | NULL              |       | 
| PeriodMeasured   | float       | YES  |     | NULL              |       | 
| Result           | varchar(32) | YES  |     | NULL              |       | 
| TensionMeasured  | float       | YES  |     | NULL              |       | 
| CalculatedPeriod | float       | YES  |     | NULL              |       | 
| SuperLayer       | int(11)     | NO   |     | NULL              |       | 
| Length           | float       | YES  |     | NULL              |       | 
| FreqMeasured     | float       | YES  |     | NULL              |       | 
| TensionError     | float       | YES  |     | NULL              |       | 
| TestLogic        | int(11)     | NO   |     | NULL              |       | 
| CalcFreq         | float       | YES  |     | NULL              |       | 
| HighCut          | float       | YES  |     | NULL              |       | 
| LowCut           | float       | YES  |     | NULL              |       | 
| Sector           | int(11)     | NO   |     | NULL              |       | 
| Date             | varchar(32) | YES  |     | NULL              |       | 
| Mod_time         | timestamp   | NO   |     | CURRENT_TIMESTAMP |       | 
+------------------+-------------+------+-----+-------------------+-------+
17 rows in set (0.04 sec)

mysql> select TensionError from R1_SL1_S6_Sense INTO OUTFILE '/tmp/R1SL1S6Sense.dat';