April 25th, 2023

Attended: Moskov, Mikhail, Jim, Sean, Eugene, Hovanes, and Igor. Yesterday evening, Justin broke his collarbone on a bike ride.

• Eugene said that Patricia is scheduled a ERR-I meeting on the first week of Aust, 2023.

• Moskov and Jim suggested for the next KLF Collaboration meeting as an International Conference for 3 days in September, 2023.

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

• Engineering Status Report (Steven Lassiter)
• Mechanical Support and Layout
• CPS FLUKA Model Update (Pavel)
• Hall D has a chance to get a portion of 40 t lead from SLAC depending on Hall C.
• Donal's questions:

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].

• Status update (Hovanes)
• CPS core temperature calculations from Poisson's equation (Hovanes)
• Two-magnet model with lead (Vitaly)
• Updates on the single-magnet CPS model (Pavel - no news)