Difference between revisions of "200kV Quadrupoles"

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-===JLab QW Air core quad===
-; Background
-* These quads are used to compensate the dipole focusing of the Wien filters.
-* There is one installed on the 6-way cross upstream/downstream of each Wien filter.
-* They were designed to fit on top of existing 6-way viewer cross (1.5" pipe w/ 2-3/4" flanges).
-* In order to maximize the field strength they were designed w/ as small an ID as possible 2-3/4".  However, this means they're captured by the flanges which are welded on after the coils are assembled.   We'd love to eliminate this, to have a quad coil that would pass over the 2-3/4" flange.
-* Their length is about 4.9", the length of the 6-way cross.   They could be longer, however, the 6-way cross abuts an 8" zero-reducer flange on the Wien filter, so a longer coil could not be perfectly symmetric on the 6-way cross.  But, that's OK.   A great way to recover field strength, I guess.
-; Drawings
-* Assembly drawing [[media:ACC2004000-1035 - QW QUAD-CROSS ASSEMBLY.pdf]]
-* Coil drawing [[media:QW_magnet.pdf]]
-; QW info
-* Present operating limit is 3A
-* Field measurements may exist, need to look
-* Jay should have a model of the quads, a good starting place, here's info from him:
- On 3/5/2020 2:42 PM, Jay Benesch wrote:
- > IR of QW model 1.375".  Cross section 0.3" radial by 0.22" azimuthal.
- > 4.92" overall length.  35 AT in my 1A model, not 36 T.  0.55 G-cm
- > dipole, 22.57 G, both evaluated at 1 cm radius.  With 1 A and 36 T,
- > 23.21 G quadrupole at 1 cm radius.
-; What to consider in a new design?
-* Larger ID air-core quad that could fit over 2-3/4" flange
-* Longer quad to provide more field strength (required values under study; appears we need at least 33% increase over existing QW @ 3A)
-* Quads have to be bakeable to 250C; as they're still captured when vacuum assembly made-up before beam line bake out
-* Operate w/ <10 A idea, so can use existing trim cards (like those presently used)
-=== Darmstadt triplet ===
-::B. Steiner et al., Recent Simulation Results of the Polarized Electron injector (SPIN) of the S-DALINAC [https://www.researchgate.net/publication/228564835_Recent_Simulation_Results_of_the_Polarized_Electron_injector_SPIN_of_the_S-DALINAC] ([[media:200204_Triplet.pdf]])
-::J. Benesch, Modeling the Darmstadt quad triplet [https://jlabdoc.jlab.org/docushare/dsweb/Get/Document-200405/JLAB-TN-19-025.pdf JLAB-TN-19-025]

Difference between revisions of "200kV Quadrupoles"

Latest revision as of 13:07, 27 August 2020

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