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IDProjectCategoryView StatusDate SubmittedLast Update
0000236Hall D OnlineControlspublic2012-04-04 15:482013-03-19 12:25
Assigned Towolin 
PlatformOSOS Version
Summary0000236: Modify Danfysik quench detector for use with solenoid
DescriptionResistors on the quench detector must be modified to give acceptable adjustment range, taking into account current-limiting resistors in the coil tap circuits.
TagsNo tags attached.
Work by outside group for Hall DNo
Estimated man-weeks1
Percentage complete0
Actual man-weeks0
Attached Files

- Relationships

-  Notes
wolin (administrator)
2012-04-04 15:49

Need signed drawings for coil tap circuits. Best would be for all four QD channels to be identical, which might require additions to the current-limiting resistor boxes. Or we might eliminate the redundant QD channel to avoid this.
wolin (administrator)
2012-08-08 14:48

Alexandre Elkiaer though my first redesign had too much input impedance, he wants to minimize this based on the maximum quench voltage. George will try to get this to me. With this I can calculate the resistor and pot values needed in the input circuits.
wolin (administrator)
2012-08-20 10:26

Sent two proposals to Alexander with different input impedances, not sure which is best. He's on vacation for a while...
wolin (administrator)
2012-09-11 13:57

Alexander suggested going with the lower impedance version, and described how to set the cable-detect resistors.
wolin (administrator)
2013-03-19 12:25

Front-end resistors modified for full solenoid, POT2 not changed. Three channels tuned for different coil comparisons. Cable detect resistors NOT modified so this feature is currently not working. Not clear if we need it since there is so much redundancy in the overall QD system.

- Issue History
Date Modified Username Field Change
2012-04-04 15:48 wolin New Issue
2012-04-04 15:48 wolin Work by outside group for Hall D => No
2012-04-04 15:48 wolin Estimated man-weeks => 1
2012-04-04 15:48 wolin Percentage complete => 0
2012-04-04 15:48 wolin Actual man-weeks => 0
2012-04-04 15:48 wolin Status new => assigned
2012-04-04 15:48 wolin Assigned To => wolin
2012-04-04 15:49 wolin Note Added: 0000342
2012-04-04 15:49 wolin Status assigned => acknowledged
2012-08-08 14:48 wolin Note Added: 0000424
2012-08-20 10:26 wolin Note Added: 0000433
2012-09-11 13:57 wolin Note Added: 0000439
2013-03-19 12:25 wolin Note Added: 0000481
2013-03-19 12:25 wolin Status acknowledged => resolved
2013-03-19 12:25 wolin Resolution open => fixed

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