<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div><div class="">Hi folks:<br class=""><div class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><br class=""></div><div class="">just a brief followup from our discussion on the timing calibration for the BCAL. Andrei is working on producing plots to investigate effects that were suggested during our CALWG meeting. </div><div class=""><br class=""></div><div class="">As far as philosophy goes, please glance at the paper from Belle (I highlighted a couple of sentences and boxed a table and equation). Of course, this is a collider experiment and they use a TOF system (rather than a calorimeter) with chambers, but they do use the same philosophy as Andrei in treating v_eff as a parameter. Their symmetrical situation and using muons gives them v_eff numbers for up and down (forward/backward in their paper) that are very close, but the point is that they do so to optimize timing for their TOF. </div><div class=""><br class=""></div><div class="">Andrei’s presentation and the Belle paper can be found here:</div><div class=""> <a href="http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=3106" class="">http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=3106</a></div><div class=""><br class=""></div><div class="">As we know, showers are nasty beasts in this regard and give different v_eff for different zones, whether layers, cells or up/down ends. It would be great to deconvolute the geometrical effects and come with a single v_eff value over the whole calorimeter (as it should be since the fibers are similar within ~15%) but this is a daunting task that may introduce big errors and degrade the timing resolution.</div><div class=""><br class=""></div><div class="">We plan to discuss all these things and Andrei’s new plots further at the upcoming CALWG meeting.</div><div class=""><br class=""></div><div class="">Thanks and cheers, Zisis...</div></div></div></div></div><div class=""><div style="color: rgb(0, 0, 0); letter-spacing: 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; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: 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; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><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; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><span class="Apple-style-span" style="border-collapse: separate; font-variant: 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; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; font-variant: 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; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><span class="Apple-style-span" style="border-collapse: separate; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><div class=""><font class="Apple-style-span" color="#1d5091" face="Verdana" size="4"><br class="Apple-interchange-newline">Dr. Zisis Papandreou</font></div><div style="color: rgb(0, 0, 0);" class=""><span class="Apple-style-span" style="font-size: 13px;"><font class="Apple-style-span" face="Verdana">Professor of Physics, Ph.D., P.Phys.</font></span></div><div style="color: rgb(0, 0, 0);" class=""><span class="Apple-style-span" style="font-size: 13px;"><font class="Apple-style-span" face="Verdana">---------------------------------------------------------</font></span></div><div style="font-size: 12px; font-style: normal; font-weight: normal;" class=""><font class="Apple-style-span" face="Verdana" color="#929292">Department of Physics </font></div><div style="font-size: 12px; font-style: normal; font-weight: normal;" class=""><font class="Apple-style-span" face="Verdana" color="#929292">University of Regina<span class="Apple-tab-span" style="white-space: pre;"> </span> </font></div><div style="font-size: 12px; font-style: normal; font-weight: normal;" class=""><font class="Apple-style-span" face="Verdana" color="#929292">3737 Wascana Parkway</font></div><div style="font-size: 12px; font-style: normal; font-weight: normal;" class=""><font class="Apple-style-span" face="Verdana" color="#929292">Regina, SK S4S 0A2<span class="Apple-tab-span" style="white-space: pre;"> </span> CANADA</font></div><div style="color: rgb(0, 0, 0); font-size: 12px; font-style: normal; font-weight: normal;" class=""><font class="Apple-style-span" face="Verdana"><br class=""></font></div><div style="color: rgb(0, 0, 0);" class=""><font class="Apple-style-span" face="Verdana"><b class="">Phone: (306) 585-5379</b></font></div></div></div></span></div></span></div></span></div></span></div></span></div></span><span class="Apple-style-span" style="font-family: Verdana; font-size: 12px;"><font class="Apple-style-span" color="#929292">Fax: (306) 585-5659</font></span><div class=""><span class="Apple-style-span" style="font-family: Verdana; font-size: 12px;"><font class="Apple-style-span" color="#929292">Email:</font> </span><a href="mailto:zisis@uregina.ca" class="">zisis@uregina.ca</a></div><div class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><font class="Apple-style-span" face="Verdana" color="#929292">Website:</font> <a href="http://www.uregina.ca/science/physics/people/faculty-research/zisis-papandreou/index.html" style="text-align: -webkit-auto;" class="">http://www.uregina.ca/science/physics/people/faculty-research/zisis-papandreou/index.html</a></div></div></span><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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