Solid XL - last look with CLEO steel?

Document #:

SoLID-doc-51-v6

Document type:

Report

Submitted by:

Jay Benesch

Updated by:

Jay Benesch

Document Created:

09 Jul 2017, 08:49

Contents Revised:

17 Jul 2017, 10:58

Metadata Revised:

17 Jul 2017, 10:58

Abstract:

A revised magnetic model of the SoLID system with the ME-specified layout at the magnet-endcap interface has been created. This model still uses the CLEO steel even though it may be replaced. It uses a 1010 BH curve rather than the Opera default “good magnet steel” as in previous documents. This increases stray field outside the iron from 5G to 10G where PMTs and detector readouts are to be placed. It also increase the field at PMT locations inside the endcap from ~60 G to ~80 G. Holes covering 2% of the surface area of the end cap have modest effects. The effect of the nose taper required to maintain acceptance to the end of the PVDIS target on the field in these regions is shown to be small (~2%), contrary to my expectations.

Files in Document:

• magnet analysis with LGC notch specified by Whit Seay (solidXL_WSnotch_july2017.pdf, 4.8 MB)
• proposed mesh which likely covers needed acceptance (markVII_try4_mesh.png, 658.2 kB)

Topics:

• Magnet

Authors:

• Jay Benesch

Keywords:

magnet

Notes and Changes:

added appendix F with plots of magnetic static potential