MantisBT - Hall D Online
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IDProjectCategoryView StatusDate SubmittedLast Update
0000236Hall D OnlineControlspublic2012-04-04 15:482013-03-19 12:25
Reporterwolin 
Assigned Towolin 
PrioritynormalSeverityfeatureReproducibilityN/A
StatusresolvedResolutionfixed 
PlatformOSOS Version
Work by outside group for Hall DNo
Estimated man-weeks1
Percentage complete0
Actual man-weeks0
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.
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Issue History
Date ModifiedUsernameFieldChange
2012-04-04 15:48wolinNew Issue
2012-04-04 15:48wolinWork by outside group for Hall D => No
2012-04-04 15:48wolinEstimated man-weeks => 1
2012-04-04 15:48wolinPercentage complete => 0
2012-04-04 15:48wolinActual man-weeks => 0
2012-04-04 15:48wolinStatusnew => assigned
2012-04-04 15:48wolinAssigned To => wolin
2012-04-04 15:49wolinNote Added: 0000342
2012-04-04 15:49wolinStatusassigned => acknowledged
2012-08-08 14:48wolinNote Added: 0000424
2012-08-20 10:26wolinNote Added: 0000433
2012-09-11 13:57wolinNote Added: 0000439
2013-03-19 12:25wolinNote Added: 0000481
2013-03-19 12:25wolinStatusacknowledged => resolved
2013-03-19 12:25wolinResolutionopen => fixed

Notes
(0000342)
wolin   
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.
(0000424)
wolin   
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.
(0000433)
wolin   
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...
(0000439)
wolin   
2012-09-11 13:57   
Alexander suggested going with the lower impedance version, and described how to set the cable-detect resistors.
(0000481)
wolin   
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.