[FFA_CEBAF_Collab] Hall A at 22 GeV

Jay Benesch benesch at jlab.org
Fri Feb 17 13:07:49 EST 2023


Colleagues, 

I attach three files comprising a draft TN on the Hall A line at 22 GeV.  Comments solicited, especially about Moller polarimeter.  In particular, rather than a polarimeter dipole with a single vacuum chamber for both scattered beams, I'm contemplating a Lambertson with a 5 cm central steel plate with 3.5 cm hole for unscattered beam and two parallel paths for the scattered electrons with a coil for each as in the existing horizontal Lambertson and that planned for 22 GeV.  

Jim: 

Outlook is not happy with your address.  I hope this gets to you. 

Jay 
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