0000236: Modify Danfysik quench detector for use with solenoid

(0000342)
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.

(0000424)
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.

(0000433)
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...

(0000439)
wolin (administrator)
2012-09-11 13:57

Alexander suggested going with the lower impedance version, and described how to set the cable-detect resistors.

(0000481)
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

Notes
(0000342) 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.

(0000424) 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.

(0000433) 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...

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

(0000481) 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.

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