Difference between revisions of "200kV Wien Filter"

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== Modeling 200kV Wien filter ==
 
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: J. Benesch, "Modeling the SLAC/JLab Wien filter" [[media:JLab-TN-15-032.pdf]]
 
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: TOSCA model of air-side magnet assembly, that is (w/o Ni plates in vacuum chamber)
 
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:: [[media:wien_noNi_B_10A.table.txt]]
 
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:: [[media:wien_noNi_B_15A.table.txt]]
 
  
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== Coil Modified for 20Amp operation ==
 
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: Replace 2 layer X 14 turn/layer #16 round wire w/ 2 layer X 13 turn/layer #13 square wire
 
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: Maintain 5.00" ID chamber clearance
 
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== Magnet Steel Modifications ==
 
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: Coil fits within existing transverse gap (chamber to steel), but not within existing vertical gap (conflicts electrode ports)
 
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: Channels are cut into upper and lower steel yokes to allow coils to separate further (remove conflicts w/ electrode ports)
 
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: COIL RETAINER PLATES (32893-C-0008) flipped hold coil 0.124" further from mid plane (0.312 - 0.188 inches)
 
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== Vacuum Chamber Modifications ==
 
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: Larger coil width conflicts with magnet mount lugs
 
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: MAGNET MOUNT LUG (32893-C-0024) width reduced from 1.45 to 0.95 inches welded to vacuum chamber body reduced and moved
 
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== Electrode modified for 20kV operation ==
 
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* [https://logbooks.jlab.org/entry/3430990 Testing of existing feedthrough 20kV]
 
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=== Wien Filter Assembly Electrical Feedthrough (JLAB DCG 32893-0020)
 
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* [https://www.mdcvacuum.com/DisplayPart.aspx?d=MDC&wr=US&p=9272007 ISI=9272001 / MDC=0815002] (20kV/15A)
 
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* [http://www.lesker.com/newweb/feedthroughs/instrument_feedthroughs_shv20_singleend.cfm?pgid=cf Kurt Lesker= IFTXE011152]
 

Latest revision as of 14:06, 27 August 2020

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