[Halld-klf-beam] KLF beamline meeting on Thursday, February 13th

[Pavel Degtiarenko]

Hi All,

My understanding for the logic of switching from 10% to 20% radiator is as follows (all numbers are approximate; assuming the flux doubles):
Suppose the photon suppression by the extra 1 cm of tungsten is 50%, and the KL suppression by 1 cm of tungsten is 20%.
If the largest acceptable photon background for 10% radiator is at 14 cm tungsten, and the KL rate at the HD target is 5 kHz,
then for 20% radiator and 15 cm tungsten we will have the same photon background, and the rate of KL will be 10 kHz * 0.8 = 8 kHz.

So there is advantage in increasing the incident photon flux and increasing the tungsten block thickness simultaneously.

Best regards,
Pavel
________________________________
From: Halld-klf-beam <halld-klf-beam-bounces at jlab.org> on behalf of Hovanes Egiyan <hovanes at jlab.org>
Sent: Tuesday, February 11, 2025 11:12 AM
To: halld-klf-beam at jlab.org <halld-klf-beam at jlab.org>
Subject: [Halld-klf-beam] KLF beamline meeting on Thursday, February 13th

Hi,

We will have a  KLF beamline meeting on Thursday, February 13th, at 1:00pm using Zoom (see information below). I posted the preliminary agenda of the meeting on  KLF wiki:

https://wiki.jlab.org/klproject/index.php/KLF_beamline_meeting_-_February_13,_2025

Please, feel free to add items to the agenda, or let me know if you would like to discuss a topic.

Best,
      Hovanes.


Join ZoomGov Meeting
https://jlab-org.zoomgov.com/j/1606674688?pwd=b3dnTzJWVEtxZExGRnFoY29PSGkxQT09

Meeting ID: 160 667 4688
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