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Hi All,</div>
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My today's presentation may be found here:</div>
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<a href="https://userweb.jlab.org/~pavel/projects/KLCPS/klcps59/K0LmtgMay01.pptx" id="LPlnk190822">https://userweb.jlab.org/~pavel/projects/KLCPS/klcps59/K0LmtgMay01.pptx</a></div>
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Sorry it was put together quite hastily.</div>
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A couple of extra considerations regarding the protection against possible beam missteerings.
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Slowly creeping beam shifts should be recognized by the redundant temperature measurements along the absorber, which must control the temperature uniformity along it.
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Fast events of magnetic field excursions can be captured by various magnetic field sensors. Standard ones can be used. Also, a simple coil placed in the magnetic field can be made really stable against radiation damage. Changes in the field would generate detectable
currents in it. The signals, together with the signals from the the downstream ion chambers, will need to generate Fast Shutdowns commands for the Accelerator. Beam missteerings at the entrance of the CPS need to be also monitored (likely by the collimator/ion
chamber combination).<br>
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All failure scenarios should be simulated and evaluated, naturally. Actually, the beam FWHM of 2.5 mm makes the conditions of the beam impact on copper much easier than the impact of a 100-200 um size beam. The dedicated beam diffuser in front of the standard
Hall D dump spreads the beam similarly and helps against the copper melting. The "time-to-melt" could be long enough for the temperature control system to react in time.<br>
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I will produce the heat deposition map in the Absorber for the cases when the mag. field is off-nominal.<br>
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Best regards,</div>
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Pavel<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-cps <halld-cps-bounces@jlab.org> on behalf of Hovanes Egiyan <hovanes@jlab.org><br>
<b>Sent:</b> Sunday, April 30, 2023 10:58 AM<br>
<b>To:</b> halld-cps@jlab.org <halld-cps@jlab.org><br>
<b>Subject:</b> [Halld-cps] Hall D CPS meeting on Monday</font>
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<p class="x_MsoNormal"><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">Hi all,</span></span></p>
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<p class="x_MsoNormal"><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">We will have a meeting on Monday, May 1st, at 1:30pm JLAB time using Zoom to discuss CPS design for Hall D. The preliminary agenda is posted at :</span></span></p>
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<p class="x_MsoNormal"><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">https://wiki.jlab.org/klproject/index.php/CPS_meeting_-_May_1,_2023</span></span></p>
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<p class="x_MsoNormal"><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">Feel free to add more discussion items.</span></span></p>
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<p class="x_MsoNormal"><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">Zoom Meeting ID:
</span></span><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">160 854 7409</span></span><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt"></span></span></p>
<p class="x_MsoNormal"><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">Passcode: 454278</span></span></p>
<p class="x_MsoNormal"><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">URL:
</span></span><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">https://jlab-org.zoomgov.com/j/1608547409?pwd=bWhpZG1yWVk1TWlEb3BjUW9DdmVLZz09</span></span><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt"></span></span></p>
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<p class="x_MsoNormal"><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt">Best,</span></span></p>
<p class="x_MsoNormal"><span class="x_DefaultFontHxMailStyle"><span style="font-size:12.0pt"> Hovanes.</span></span></p>
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