[Pi0tff] Fw: PRad II Questions

[Eugene Pasyuk]

I had a meeting with Bob and Chris. They started looking into the layout of the HyCal experiments.
They have a few questions which we need to answer. We'll need to talk about it at tomorrow's meeting.

-Eugene
________________________________
From: Bob Miller <rmiller at jlab.org>
Sent: Tuesday, November 14, 2023 13:37
To: Eugene Pasyuk <pasyuk at jlab.org>
Cc: Christopher Guthrie <guthrie at jlab.org>
Subject: PRad II Questions


Hi Eugene,

Here are the questions that we have for PRad II, X17, and TFF.

Thanks,

Bob



GEM detectors

·         What size are the GEM detectors, length, width, height?

o   Provide a CAD model if possible

·         What size is the helium bag?

·         What are the GEMS bolted to?

o   Hycal detector for calibration?

o   Hycal stand?



Prad II

·         What is the acceptance in theta, and the location of the target and Hycal along the beam line?



X17

·         What is the acceptance in theta, min and max, and the location of the target and Hycal along the beam line?

·         Is it beneficial to have the target closer to Hycal and only use the small vacuum tank with a 1 meter diameter window?

·         Beam tube connected to the window

o   Is this beneficial for X17, or does it cause more background at low angles?

§  Should the beam tube be removed and just have a full size window 0.032” thick

·         Is it better to just have a thin window on the helium bag and have the electron beam go through the helium

o   If used, should it be smaller to allow more acceptance at lower angles?



TFF

·         What is the acceptance in theta, min and max, and the location of the target and Hycal along the beam line?

--
Bob Miller
Hall B Lead Engineer
Jefferson Lab
757 822-9586


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