Difference between revisions of "200kV Wien Filter"
Jump to navigation
Jump to search
Line 1: | Line 1: | ||
− | == ME | + | == ME Design == |
Wien filter drawings are up to date (as of June 2017) | Wien filter drawings are up to date (as of June 2017) | ||
Line 12: | Line 12: | ||
Note : we discussed making electrodes from one solid piece of stainless steel instead of five pieces brazed together. | Note : we discussed making electrodes from one solid piece of stainless steel instead of five pieces brazed together. | ||
− | == Modeling | + | == Magnet Design == |
+ | |||
+ | ==== Jay's TOSCA Modeling ==== | ||
: J. Benesch, "Modeling the SLAC/JLab Wien filter" [[media:JLab-TN-15-032.pdf]] | : J. Benesch, "Modeling the SLAC/JLab Wien filter" [[media:JLab-TN-15-032.pdf]] | ||
: TOSCA model of air-side magnet assembly, that is (w/o Ni plates in vacuum chamber) | : TOSCA model of air-side magnet assembly, that is (w/o Ni plates in vacuum chamber) | ||
Line 18: | Line 20: | ||
:: [[media:wien_noNi_B_15A.table.txt]] | :: [[media:wien_noNi_B_15A.table.txt]] | ||
− | == Coil Modified for 20Amp operation == | + | ==== Coil Modified for 20Amp operation ==== |
: Replace 2 layer X 14 turn/layer #16 round wire w/ 2 layer X 13 turn/layer #13 square wire | : Replace 2 layer X 14 turn/layer #16 round wire w/ 2 layer X 13 turn/layer #13 square wire | ||
: Maintain 5.00" ID chamber clearance | : Maintain 5.00" ID chamber clearance | ||
− | == Magnet Steel Modifications == | + | ==== Magnet Steel Modifications ==== |
: Coil fits within existing transverse gap (chamber to steel), but not within existing vertical gap (conflicts electrode ports) | : Coil fits within existing transverse gap (chamber to steel), but not within existing vertical gap (conflicts electrode ports) | ||
: Channels are cut into upper and lower steel yokes to allow coils to separate further (remove conflicts w/ electrode ports) | : Channels are cut into upper and lower steel yokes to allow coils to separate further (remove conflicts w/ electrode ports) | ||
: COIL RETAINER PLATES (32893-C-0008) flipped hold coil 0.124" further from mid plane (0.312 - 0.188 inches) | : COIL RETAINER PLATES (32893-C-0008) flipped hold coil 0.124" further from mid plane (0.312 - 0.188 inches) | ||
− | == Vacuum Chamber Modifications == | + | ==== Vacuum Chamber Modifications === |
: Larger coil width conflicts with magnet mount lugs | : Larger coil width conflicts with magnet mount lugs | ||
: MAGNET MOUNT LUG (32893-C-0024) width reduced from 1.45 to 0.95 inches welded to vacuum chamber body reduced and moved | : MAGNET MOUNT LUG (32893-C-0024) width reduced from 1.45 to 0.95 inches welded to vacuum chamber body reduced and moved | ||
− | == | + | == High Voltage Design == |
==== We still use the standard HV feedthroughs (20kV/15A) JLAB DCG 32893-0020==== | ==== We still use the standard HV feedthroughs (20kV/15A) JLAB DCG 32893-0020==== |
Revision as of 13:26, 12 December 2017
ME Design
Wien filter drawings are up to date (as of June 2017)
- M:\me-group\machie\wien filter
- In the main folder are:
- the original fabrication drawings we used.
- sub folder that has revised version of the original drawings to show the latest as-built changes.
- sub folder labeled "200KV" that has drawings for the differences in the 200KV wien filter.
- copy of ECO 1046 that has the analysis of the original vacuum chamber welds.
- a spreadsheet that lists all the drawings and revision status and applicability.
Note : we discussed making electrodes from one solid piece of stainless steel instead of five pieces brazed together.
Magnet Design
Jay's TOSCA Modeling
- J. Benesch, "Modeling the SLAC/JLab Wien filter" media:JLab-TN-15-032.pdf
- TOSCA model of air-side magnet assembly, that is (w/o Ni plates in vacuum chamber)
Coil Modified for 20Amp operation
- Replace 2 layer X 14 turn/layer #16 round wire w/ 2 layer X 13 turn/layer #13 square wire
- Maintain 5.00" ID chamber clearance
Magnet Steel Modifications
- Coil fits within existing transverse gap (chamber to steel), but not within existing vertical gap (conflicts electrode ports)
- Channels are cut into upper and lower steel yokes to allow coils to separate further (remove conflicts w/ electrode ports)
- COIL RETAINER PLATES (32893-C-0008) flipped hold coil 0.124" further from mid plane (0.312 - 0.188 inches)
= Vacuum Chamber Modifications
- Larger coil width conflicts with magnet mount lugs
- MAGNET MOUNT LUG (32893-C-0024) width reduced from 1.45 to 0.95 inches welded to vacuum chamber body reduced and moved
High Voltage Design
We still use the standard HV feedthroughs (20kV/15A) JLAB DCG 32893-0020
- ISI/MDC version of P/N
- Kurt Lesker version of P/N
- Phil/Danny increased the length of the Electrode Insulator (see JLAB DCG 32893-0112)
- Increased length by 0.25" see for comparison media:171212_longerspacer.pdf
- Phil/Danny increased the length of the HV Connector Spring Guide (see JLAB DCG 32893-0137)
- Increased length by 0.25" see for comparison media:171212_longerguide.pdf