MantisBT - Hall D Online
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IDProjectCategoryView StatusDate SubmittedLast Update
0000161Hall D OnlineControlspublic2011-10-31 14:532012-04-04 15:04
Reporterwolin 
Assigned Towolin 
PriorityhighSeverityfeatureReproducibilityN/A
StatusresolvedResolutionfixed 
PlatformOSOS Version
Work by outside group for Hall DNo
Estimated man-weeks4
Percentage complete0
Actual man-weeks0
Summary0000161: Develop scheme to isolate signals from the solenoid magnet coil taps
DescriptionDuring the test we saw noise, cross-talk and baseline shifts on the coil tap voltage channels. We need to design an isolation scheme that simultaneously satisfies our need for precision, speed and voltage range for the fast and slow DAQ systems and the quench detector.
Steps To Reproduce
Additional InformationIdeal would be to use a single isolation amplifier per tap on the platform close to the taps.
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Issue History
Date ModifiedUsernameFieldChange
2011-10-31 14:53wolinNew Issue
2011-10-31 14:53wolinWork by outside group for Hall D => No
2011-10-31 14:53wolinEstimated man-weeks => 4
2011-10-31 14:53wolinPercentage complete => 0
2011-10-31 14:53wolinActual man-weeks => 0
2011-10-31 14:54wolinStatusnew => assigned
2011-10-31 14:54wolinAssigned To => dickover
2012-01-19 14:42wolinAssigned Todickover => wolin
2012-01-19 14:42wolinNote Added: 0000242
2012-01-19 14:42wolinStatusassigned => acknowledged
2012-01-27 10:00wolinNote Added: 0000256
2012-04-04 15:04wolinNote Added: 0000332
2012-04-04 15:04wolinStatusacknowledged => resolved
2012-04-04 15:04wolinResolutionopen => fixed

Notes
(0000242)
wolin   
2012-01-19 14:42   
With luck the National Instruments CRio or PXI systems will solve all our problems, Yi is investigating and getting prices.
(0000256)
wolin   
2012-01-27 10:00   
PXI looks like the best choice, and Labview RT isn't too expensive. With PXI we won't need Labview FPGA. We seem set on licenses at the moment. Yi is still optimizing the hardware configuration and getting prices. Should have a final configuration next week.
(0000332)
wolin   
2012-04-04 15:04   
After research by Yi we have settled on the National Instruments PXI system for both the fast and slow daq systems. All coil taps and fast daq channels will be connected to the PXI device. Direct connections from these channels to the PLC will be eliminated. Josh and Yi were able to get the PLC to read PXI channel values.