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

R1S6_SL2_HVB2_BurnIn

Guard current is typically below 0.01 microAmp

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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';