[FFA_CEBAF_Collab] [EXTERNAL] RE: higher field septa

[Gupta, Ramesh C]

Jay,
Thanks. Yes I would love to have them. Please share. I am enthusiastic for such a proposal. I am copying Kathleen also here.

I am very much interested in superconducting shielding as in addition to what you mentioned, it can be used at other places in EIC, as well. We had two Phase I SBIRs, one with the PBL, Inc. on HTS and NbTi shielding and another on MgB2 shielding with HyperTech.  We did some experiments in Phase I and presented a paper at ASC (please see attached).


Best regards,
-Ramesh
Ramesh Gupta
Head, Magnet Science Group
Magnet Division
gupta at bnl.gov
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.bnl.gov_magnets_Staff_Gupta_default.htm&d=DwIGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=Ogg4WFNBwvADBq3fkmCLiJ7SaRDPYtawHzJElJMB0jE&m=bGuvtC-jqVIEJCyHuYN9mwxvQ2bjlOBn1OAQIXQnIK6W0HcmVOrvAiNbS9LsjC3P&s=txEnKzDKG1jYQ9Rya7Jnyq_nSMmwReDiVm6iOkgXt3o&e= 
(631)344-4805
Building 902A

Upton, NY 11973 USA
FAX: (631)344-2190 
Twitter | Facebook | Instagram | LinkedIn

-----Original Message-----
From: Jay Benesch <benesch at jlab.org> 
Sent: Wednesday, March 23, 2022 1:23 PM
To: ffa_cebaf_collab at jlab.org; Gupta, Ramesh C <gupta at bnl.gov>; Camille Ginsburg <ginsburg at jlab.org>
Subject: higher field septa

Colleagues,

Attached please find a draft tech note created to determine whether the existing septa steel lengths are sufficient at 22 GeV if one can adequately magnetically-couple a conductively cooled HTS superconductor to the steel.  With that very stringent caveat, the answer is yes.  One may even be able to shorten the steel ~10% to keep the overall installation length, including cryocooler(s), the same.

Harmonic content is large.  If anyone wants the 25 MB spreadsheet with the details of the summaries in tables 2 and 3, email me.  And the opc files, for that matter.  Maximum mesh size is 2 mm, quadratic elements, where beam orbits are calculated.  Sampling theorem requirements more than satisfied even for 20-pole.

Jay
-------------- next part --------------
A non-text attachment was scrubbed...
Name: asc2018-gupta-2LPo2K-08-final-header.pdf
Type: application/pdf
Size: 454122 bytes
Desc: asc2018-gupta-2LPo2K-08-final-header.pdf
URL: <https://mailman.jlab.org/pipermail/ffa_cebaf_collab/attachments/20220323/2e924dd7/attachment-0001.pdf>