<html><body><div><div><div style="font-family: Calibri,sans-serif; font-size: 11pt;">Hi Baptiste and all,<br><br>Cancelling tomorrow's meeting is fine with me. We are setting up the test stand, dark box and DAQ for testing MaPMT and MCP-PMT. Argonne final over came the sparking issue and we are expecting a unit delivered to us in mid October.<br><br>Cheers,<br>Yi<br><br>Sent from my Windows Phone</div></div><div dir="ltr"><hr><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">From: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:cmeyer@cmu.edu">Curtis A. Meyer</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Sent: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">9/25/2014 8:12 PM</span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">To: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:guegan@mit.edu">Baptiste Guegan</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Cc: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:halld-pid-upgrade@jlab.org">halld-pid-upgrade@jlab.org</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Subject: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">Re: [Halld-pid-upgrade] PID Upgrade Meeting Tomorrow</span><br><br></div></div><br><div><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">I don’t want to stop a meeting if it is necessary, but I am also sitting through a pretty large number<div>each week at the moment. Given that we will have status report next week at the collaboration </div><div>meeting, I am not adverse to canceling the meeting tomorrow… Curtis<br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div><div>---------</div><div>Curtis A. Meyer<span class="Apple-tab-span" style="white-space: pre; "> </span>MCS Associate Dean for Faculty and Graduate Affairs</div><div>Wean: (412) 268-2745<span class="Apple-tab-span" style="white-space: pre; "> </span>Professor of Physics</div><div>Doherty: (412) 268-3090<span class="Apple-tab-span" style="white-space: pre; "> </span>Carnegie Mellon University</div><div>Fax: (412) 681-0648<span class="Apple-tab-span" style="white-space: pre; "> </span>Pittsburgh, PA 15213</div><div><a href="mailto:curtis.meyer@cmu.edu">curtis.meyer@cmu.edu</a><span class="Apple-tab-span" style="white-space: pre; "> </span>http://www.curtismeyer.com/</div></div><div><br></div></span><br class="Apple-interchange-newline">
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<br><div><div>On Sep 25, 2014, at 6:39 PM, Baptiste Guegan <<a href="mailto:guegan@mit.edu">guegan@mit.edu</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div ocsi="0" fpstyle="1" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="direction: ltr; font-family: Tahoma; font-size: 10pt;"><font face="Tahoma" size="2"><span dir="ltr" style="font-size: 10pt;">Dear all,<br><br>I would like to summarize the situation on our side:<br><br>_We have set the length of the prototype to be 1m long. That will allow us to study a full arc, with some reflections on the side.<br>_We have contacted a company that will make the surface coating of the 3 segment mirrors (which is still the best compromise with the last simulation results). The coating is about 1000$. The reflectivity depends on the surface quality (polishing), and we are trying to know what kind of quality we could get at Bates.<span class="Apple-converted-space"> </span><br>_We have corrected a bug in the analysis code, and we have now to reprocess the simulations to get the new results. At first sight, it seems that this error (PMT QE was not properly implemented) does not affect too much the main results.<br>_right now, the plan is to use water (deionized, that gets the best transmittance). This, as you know, is not a trivial thing to produce. Fortunately, I contacted Jerry that told me that the whole purification system is available at SLAC. We would "just" need to replace some filters. That would save us between 20 to 30k $. :)<br>_We are trying to gather some information about the reactivity of the deionized water with the aluminum substrate and the coating. But the answer will be probably that we don't know. We will probably need to make a real test and to put a small sample of the mirror inside a deionized water bath.<span class="Apple-converted-space"> </span><br><br>This is the status on our side. Does anybody want to present something else for tomorrow? Should we have the meeting?<span class="Apple-converted-space"> </span><br><br>Thanks<br>Baptiste<br><br></span></font></div>_______________________________________________<br>Halld-pid-upgrade mailing list<br><a href="mailto:Halld-pid-upgrade@jlab.org">Halld-pid-upgrade@jlab.org</a><br><a href="https://mailman.jlab.org/mailman/listinfo/halld-pid-upgrade">https://mailman.jlab.org/mailman/listinfo/halld-pid-upgrade</a></div></blockquote></div><br></div></div></body></html>