0000337: Refurbish Danfysik power supply for production running

(0000508)
wolin (administrator)
2013-04-03 16:25

Danfysik techs will be here this summer to work on supplies in other halls. Tim is organizing for them to work on our supply as well.

(0000517)
wolin (administrator)
2013-05-16 17:10

Need to tune for 25H instead of 2H (done for Hall A). Need to program ramp profile to get smooth voltage profile, including no overshoot. Probably need timer to inhibit quench detection when the contacter is first closed for (say) 100 ms.

(0000533)
wolin (administrator)
2013-06-14 10:19
edited on: 2013-06-14 10:20

Parts for tuning for 25H on the way from Danfysik. Giles figured out how to program hardware ramp profiles. Dave B will think about doing the same in the PLC.

Note that the hardware has many constraints, including the number of points per profile and the number of profiles stored. The PLC has no constraints. Note that we'll need profiles for ramping up AND down. Further the PLC could generate ramp profiles on the fly based on start/end currents and number of steps, so nothing would need to be stored.

(0000534)
wolin (administrator)
2013-06-14 10:21

Waiting for parts to arrive.

(0000545)
wolin (administrator)
2013-06-25 16:59

Parts here, not sure if we'll install them before or after solenoid test.

(0000553)
wolin (administrator)
2013-07-18 09:13

Since we had innumerable delays in the cryo plant all parts were installed, FPGA programs were updated, etc.

(0000554)
wolin (administrator)
2013-07-18 09:14

We still probably want Danfysik techs to come out and go over the whole power supply.

Issue History
Date Modified	Username	Field	Change
2013-04-03 16:24	wolin	New Issue
2013-04-03 16:24	wolin	Work by outside group for Hall D	=> No
2013-04-03 16:24	wolin	Estimated man-weeks	=> 2
2013-04-03 16:24	wolin	Percentage complete	=> 0
2013-04-03 16:24	wolin	Actual man-weeks	=> 0
2013-04-03 16:24	wolin	Status	new => assigned
2013-04-03 16:24	wolin	Assigned To	=> wolin
2013-04-03 16:25	wolin	Note Added: 0000508
2013-04-03 16:25	wolin	Status	assigned => acknowledged
2013-05-16 17:10	wolin	Note Added: 0000517
2013-06-14 10:19	wolin	Note Added: 0000533
2013-06-14 10:20	wolin	Note Edited: 0000533
2013-06-14 10:21	wolin	Note Added: 0000534
2013-06-14 10:21	wolin	Status	acknowledged => feedback
2013-06-25 16:59	wolin	Note Added: 0000545
2013-07-18 09:13	wolin	Note Added: 0000553
2013-07-18 09:14	wolin	Note Added: 0000554

Notes
(0000508) wolin (administrator) 2013-04-03 16:25	Danfysik techs will be here this summer to work on supplies in other halls. Tim is organizing for them to work on our supply as well.

(0000517) wolin (administrator) 2013-05-16 17:10	Need to tune for 25H instead of 2H (done for Hall A). Need to program ramp profile to get smooth voltage profile, including no overshoot. Probably need timer to inhibit quench detection when the contacter is first closed for (say) 100 ms.

(0000533) wolin (administrator) 2013-06-14 10:19 edited on: 2013-06-14 10:20	Parts for tuning for 25H on the way from Danfysik. Giles figured out how to program hardware ramp profiles. Dave B will think about doing the same in the PLC. Note that the hardware has many constraints, including the number of points per profile and the number of profiles stored. The PLC has no constraints. Note that we'll need profiles for ramping up AND down. Further the PLC could generate ramp profiles on the fly based on start/end currents and number of steps, so nothing would need to be stored.

(0000534) wolin (administrator) 2013-06-14 10:21	Waiting for parts to arrive.

(0000545) wolin (administrator) 2013-06-25 16:59	Parts here, not sure if we'll install them before or after solenoid test.

(0000553) wolin (administrator) 2013-07-18 09:13	Since we had innumerable delays in the cryo plant all parts were installed, FPGA programs were updated, etc.

(0000554) wolin (administrator) 2013-07-18 09:14	We still probably want Danfysik techs to come out and go over the whole power supply.

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