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<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">Hi Vitaly,
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<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">If we take the data in the EPICS archiver for GlueX and scale the beam current to 5uA, then we get that the radiation dose rate near the electronic racks in the tagger
hall will be about 10 rem/hour as detected by the gamma radiation probe (the neutron probe indicates a factor of 50x smaller dose rate). The gamma probe, I believe, is somewhere on the floor. Pavel’s simulation estimates from his preprint are 5-20 rem/hour
for total rates, depending on the z-coordinate, for a similar radiator thickness. This means that 200 rem/hour is approximately 10 to 40 times more (depending what number we exactly compare to) than what we would get with 5uA beam and the nominal GlueX radiator
without extra shielding. <o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">I believe that we should aim to be below 20 rem/hour in the tagger hall with the CPS setup to be able to be consistent with what we argued in the proposal. <o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">Hovanes.
<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
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<p class="MsoNormal" style="border:none;padding:0in"><b>From: </b><a href="mailto:vitbaturin01@gmail.com">Vitaly Baturin</a><br>
<b>Sent: </b>Tuesday, December 6, 2022 5:52 PM<br>
<b>To: </b><a href="mailto:hovanes@jlab.org">Hovanes Egiyan</a><br>
<b>Cc: </b><a href="mailto:halld-cps@jlab.org">halld-cps@jlab.org</a><br>
<b>Subject: </b>[EXTERNAL] Re: [Halld-cps] Hall D CPS meeting on Monday</p>
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<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;color:black">Dear Colleagues<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;color:black">My note concerns the maximum dose rate around the CPS.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;color:black">From Fig.16 of our technical note <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;color:black"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.overleaf.com_project_62acf5358f0842034a10659b&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=LSns0Jn-3qapUiEIcy9zXPfty-CatLIPNx9zyzVp3-s&m=a-8S-9wmnLdz42aA7mS5Ege0zd8-pIs740NzGFiNWMEe483DAy0uontT9vp3_Foz&s=Zl5xZxgCuH7-7r41GdU1kOjhMdTe88kqFWuq9eYPOPI&e=">https://www.overleaf.com/project/62acf5358f0842034a10659b</a> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;color:black">we find that the maximum "PROMPT DOSE EQUIVALENT" is ~200 rem/hr. This quantity includes biological effects.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;color:black">From Fig.17 of the same document we read "PROMPT DOSE" of 10 rad/hr. which does not include biological effects.<o:p></o:p></span></p>
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<p class="MsoNormal">----------------------<o:p></o:p></p>
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<p class="MsoNormal">Dr. Vitaly Baturin,<o:p></o:p></p>
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<p class="MsoNormal">OCNPS 2103A, Old Dominion University,<br>
4600 Elkhorn Ave, Norfolk, <o:p></o:p></p>
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<p class="MsoNormal">VA 23529 USA.<o:p></o:p></p>
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<p class="MsoNormal">757 633 5669<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">----------------------<br>
Off: (757) 683 5807<o:p></o:p></p>
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<p class="MsoNormal">Mob: (757) 633 5669<o:p></o:p></p>
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<p class="MsoNormal">Skype: vitaly.baturin<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Fri, Dec 2, 2022 at 8:33 PM Hovanes Egiyan <<a href="mailto:hovanes@jlab.org">hovanes@jlab.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt">Hi all,</span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt">Since we could not go over all the topics during our last meeting, let’s have an extra CPS
meeting coming Monday, December 5th, at 1:30pm JLAB time using Zoom to discuss CPS design for Hall D. The preliminary agenda is posted at :</span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt"><a href="https://wiki.jlab.org/klproject/index.php/CPS_meeting_-_December_5,_2022" target="_blank">https://wiki.jlab.org/klproject/index.php/CPS_meeting_-_December_5,_2022</a></span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt"> </span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt">Feel free to add more discussion items.</span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt">Zoom Meeting ID: 160 854 7409</span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt">Passcode: 454278</span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt">URL:
<a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1608547409-3Fpwd-3DbWhpZG1yWVk1TWlEb3BjUW9DdmVLZz09&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=LSns0Jn-3qapUiEIcy9zXPfty-CatLIPNx9zyzVp3-s&m=a-8S-9wmnLdz42aA7mS5Ege0zd8-pIs740NzGFiNWMEe483DAy0uontT9vp3_Foz&s=7CnzFikALdhim33vukpYyWR1tCX3XuW9zgzBb0tQCC8&e=" target="_blank">
https://jlab-org.zoomgov.com/j/1608547409?pwd=bWhpZG1yWVk1TWlEb3BjUW9DdmVLZz09</a></span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt"> </span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt">Best,</span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt"> Hovanes.</span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt"> </span></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span class="m1716436820960602607defaultfonthxmailstyle"><span style="font-size:12.0pt"> </span></span></p>
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<p class="MsoNormal" style="margin-left:4.8pt">_______________________________________________<br>
Halld-cps mailing list<br>
<a href="mailto:Halld-cps@jlab.org" target="_blank">Halld-cps@jlab.org</a><br>
<a href="https://mailman.jlab.org/mailman/listinfo/halld-cps" target="_blank">https://mailman.jlab.org/mailman/listinfo/halld-cps</a><o:p></o:p></p>
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