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<div class="elementToProof" style="font-family: "Times New Roman", Times, serif; font-size: 14pt; color: rgb(0, 0, 0);">
Hi Beni,</div>
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<br>
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In the proposal we presented to rate of KL on LH target.</div>
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It is attached to this message. Yes, lot of them are absorbed and only some fraction</div>
<div class="elementToProof" style="font-family: "Times New Roman", Times, serif; font-size: 14pt; color: rgb(0, 0, 0);">
of KL arrive to the target. Therefore, as you also found at low momenta the flux of KL is low, as you can see. </div>
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The plot represents the flux versus momentum, so in a sense your calculations show that percentage of low momenta is low, but one has to normalize it not to the arbitrary 10K thrown,</div>
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but how many of them are produced and how many arrive to the target.</div>
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This already has been done.</div>
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Thanks for your message and best regards,</div>
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Moskov.</div>
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<div><span style="font-family: "Times New Roman", Times, serif; font-size: 12pt; color: rgb(12, 100, 192);"><b> </b></span><span style="font-family: "Times New Roman", Times, serif; font-size: 14pt; color: rgb(12, 100, 192);">Dr. Moskov Amaryan</span></div>
<div><span style="font-family: "Times New Roman", Times, serif; font-size: 14pt; color: rgb(12, 100, 192);">Eminent Scholar and Professor of Physics</span><span style="font-family: "Times New Roman", Times, serif; font-size: 13px; color: rgb(0, 0, 0);"><br>
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<div><span style="font-family: "Times New Roman", Times, serif; font-size: 14pt; color: rgb(12, 100, 192);">Old Dominion University</span><span style="font-family: "Times New Roman", Times, serif; font-size: 13px; color: rgb(0, 0, 0);"><br>
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<div><span style="font-family: "Times New Roman", Times, serif; font-size: 14pt; color: rgb(12, 100, 192);">Norfolk, VA 23529</span><span style="font-family: "Times New Roman", Times, serif; font-size: 12pt; color: rgb(179, 106, 226);"></span><span style="font-family: "Times New Roman", Times, serif; font-size: 13px; color: rgb(0, 0, 0);"><br>
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</span><span style="font-family: "Times New Roman", Times, serif; font-size: 12pt; color: rgb(12, 100, 192);">Phone: 757-683-4614</span><span style="font-family: "Times New Roman", Times, serif; font-size: 13px; color: rgb(0, 0, 0);"><br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Halld-klf <halld-klf-bounces@jlab.org> on behalf of Beni Zihlmann <zihlmann@jlab.org><br>
<b>Sent:</b> Monday, December 11, 2023 4:55 PM<br>
<b>To:</b> halld-klf@jlab.org <halld-klf@jlab.org><br>
<b>Subject:</b> [Halld-klf] KL beam line check</font>
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<div class="PlainText">EXTERNAL to ODU: This email is not from an ODU account. Do not click links or open attachments unless you recognize the sender and know the content is safe.<br>
<br>
Attached you find a short note about simulating Klong beam in the<br>
Be-production<br>
target and test how many may reach the liquid hydrogen target.<br>
As you can see the transmission rate is below 10% for any Klong below<br>
2000MeV/c<br>
<br>
Also it looks like it is very important to have good shielding along the<br>
beam line<br>
all the way from the start of the beam line to the exit of the alcove<br>
and also<br>
before the cryogenic target to prevent particles from entering the CDC gong<br>
along z over the full length of the CDC. such particles are devastating<br>
for CDC<br>
operation.<br>
<br>
cheers,<br>
Beni<br>
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