April 25th, 2023

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Attended: Moskov ... and Igor. Justin broke his collarbone yesterday evening on a bike ride.


  • On April 21th, Tanja Horn had a CPS meeting (main focus is CPS for Hall C) [1].

My concerns will be assuaged if a we had a radiation dose prediction of the target after a month of running with an electron beam of 90 na. No CPS and a pure electron beam.

I’d like to compare the case presented by Pavel today with one where the beam energy and target details are unchanged but instead of a photon beam on the target, the study would assume an electron beam of 90 na.

In other words, I’d like to compare what MIGHT be real-world conditions (with the CPS) with what would represent the conditions we have actually had in the past.

I might have asked for something that leaves us open to criticism that we are comparing apples to oranges.


  • On April 17th, we had a Hovanes CPS meeting discuss CPS design for Hall D and to prepare for ERR-I [2].