<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">It seems that Maurizio has problems to send mails to lowq mail list, so I forward it.<div><br><div><br><div>Début du message réexpédié :</div><br class="Apple-interchange-newline"><blockquote type="cite"><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" color="#000000" style="font: 12.0px Helvetica; color: #000000"><b>De : </b></font><font face="Helvetica" size="3" style="font: 12.0px Helvetica">Maurizio Ungaro <<a href="mailto:ungaro@jlab.org">ungaro@jlab.org</a>></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" color="#000000" style="font: 12.0px Helvetica; color: #000000"><b>Date : </b></font><font face="Helvetica" size="3" style="font: 12.0px Helvetica">8 octobre 2009 00:53:16 HAEC</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" color="#000000" style="font: 12.0px Helvetica; color: #000000"><b>À : </b></font><font face="Helvetica" size="3" style="font: 12.0px Helvetica"><a href="mailto:stepanya@jlab.org">stepanya@jlab.org</a></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" color="#000000" style="font: 12.0px Helvetica; color: #000000"><b>Cc : </b></font><font face="Helvetica" size="3" style="font: 12.0px Helvetica"><a href="mailto:bueltman@jlab.org">bueltman@jlab.org</a>, <a href="mailto:lowq@jlab.org">lowq@jlab.org</a>, Volker Burkert <<a href="mailto:burkert@jlab.org">burkert@jlab.org</a>>, Yohann Perrin <<a href="mailto:perrin@jlab.org">perrin@jlab.org</a>></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" color="#000000" style="font: 12.0px Helvetica; color: #000000"><b>Objet : </b></font><font face="Helvetica" size="3" style="font: 12.0px Helvetica"><b>cc threshold mV vs ADC</b></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div> </div><div>The following runs has been taken with different threshold today:<br><br>RUN Thr ch1 ch2 ch3 ch4<br>60761 20 86 88 84 86<br>60763 40 162 172 172 175<br>60764 80 324 341 320 332<br>60767 100 400 415 413 410<br>60768 60 248 254 250 254<br><br><br>You can find attached the correspondence between mV and ADC for the various thresholds.<br>50 mV corresponds to 200 ADC which is the peak of the single photoelectron peak.<br><br>Let me remind you that, at the analysis stage, a NPHE > 25 cut is now considered bad habit, since it cuts good electrons that, due to low efficiency, only release 1-2 photo-electrons. They are still good electrons. For this reason, I suggest to use a 40mV threshold max. I also suggest to explore raising EC threshold.<br><br><br>best regards,<br>mauri<br><br><br></div></blockquote></div></div><span></span></body></html>