<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
Flighters,<br>
<br>
Please find the minutes below and at
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_November_17,_2015#Minutes">https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_November_17,_2015#Minutes</a>
.<br>
<br>
-- Mark<br>
____________________________________________<br>
<br>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<div id="column-content" style="margin: 0px !important; color:
rgb(0, 0, 0); font-family: 'Times New Roman'; font-size: medium;
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: 1; word-spacing: 0px;
-webkit-text-stroke-width: 0px; background-color: rgb(255, 255,
255);">
<div id="content" class="mw-body" role="main" style="direction:
ltr; color: black; border: none !important; padding: 1em;
margin: 0px !important; background: white;">
<h1 id="firstHeading" class="firstHeading" style="font-weight:
bold;" lang="en"><span dir="auto">GlueX TOF Meeting, November
17, 2015</span>, Minutes</h1>
<div id="bodyContent" class="mw-body-content"><span
class="mw-headline" id="Minutes"></span>
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Present:</p>
<ul style="list-style-type: square;">
<li><b>FSU</b>: Hussein Al Ghoul, Brad Cannon, Sasha
Ostrovidov, Aristeidis Tsaris</li>
<li><b>JLab</b>: Mark Ito (chair), Simon Taylor, Beni
Zihlmann</li>
</ul>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">There is<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://bluejeans.com/s/8OSM/" style="color:
inherit !important; padding: 0px !important;
text-decoration: inherit !important; background:
transparent;">recording</a><span
class="Apple-converted-space"> </span>of this meeting
available on the BlueJeans site.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="New_TOF_scaler_GUI">New TOF
scaler GUI</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Paul Mattione has created a<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://logbooks.jlab.org/entry/3350719"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">new TOF scaler GUI</a><span
class="Apple-converted-space"> </span>some months ago.
Sasha commented that he used it to discover the bad FADC
mentioned below.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Review_of_minutes_from_November_3">Review of minutes
from November 3</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We went over the<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_November_3,_2015#Minutes"
title="GlueX TOF Meeting, November 3, 2015"
style="color: rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">minutes</a>.
Sasha has been taking data successfully; ROCTOF1 has not
been crashing after the bad FADC was found and replaced.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Brad plans to be at the Calibration
Meeting tomorrow where the<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/Calibration_Challenge"
title="Calibration Challenge" style="color: rgb(85, 34,
0); padding: 0px !important; text-decoration: underline;
background: transparent;">Calibration Challenge</a><span
class="Apple-converted-space"> </span>will be discussed.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id=".22Random.22_TDC_Calibration_Offset">"Random" TDC
Calibration Offset</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Beni described a<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://mailman.jlab.org/pipermail/halld-pid/2015-November/000840.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">problem with TOF Points</a><span
class="Apple-converted-space"> </span>that he uncovered
by looking at the event display. Occasionally he saw hits
missing in the display when they were present in the raw
data. This was traced to a difference in how one of our
calibration constants was obtained versus how it is
applied. The scheme to disambiguate the 6-fold ambiguity
in the CAEN TDCs had different indices for the
identification of the correct cyclic permutation of the
pattern of shifts. One out of six events (randomly) would
be shifted from nominal. This was resolved by changing the
constant to agree with what is used in reconstruction.
This fixes it for the Spring-15 run. The problem remains
there in the Fall-14 data.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Calibration_Status.2C_FSU">Calibration
Status, FSU</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Sasha showed two events:</p>
<ul style="list-style-type: square;">
<li><a rel="nofollow" class="external text"
href="http://128.186.19.133/%7Eostrov/tof/20151117/good_event.png"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Very rare Good Event</a></li>
<li><a rel="nofollow" class="external text"
href="http://128.186.19.133/%7Eostrov/tof/20151117/common_event.png"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Overwhelming majority of
events</a></li>
</ul>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">He is having problems making progress
with the cosmic calibration since the good events only
contribute about one part in ten thousand to the event
sample. He continues to explore different DAQ parameters
to try to enrich the sample.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Hot_Check-Out">Hot Check-Out</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">It turns out that Aristeidis and Mark
went through the checklist last time. Mark will give it a
shot this time. This needs to be done by next Wednesday.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Equipment_Loan.2C_JLab_to_FSU">Equipment
Loan, JLab to FSU</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">The<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://halldweb.jlab.org/talks/2015/fsu_loan.pdf"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">loan</a><span
class="Apple-converted-space"> </span>is up for renewal.
Paul Eugenio is aware of the situation.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="NIM_Article">NIM Article</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Beni talked to Paul about the status
of the article. It has been on the back burner lately.
Beni intends to contribute a section on calibration to the
draft.</p>
</div>
<div class="printfooter" style="padding: 1em 0px;">Retrieved
from "<a dir="ltr"
href="https://halldweb.jlab.org/wiki/index.php?title=GlueX_TOF_Meeting,_November_17,_2015&oldid=71436"
style="color: rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">https://halldweb.jlab.org/wiki/index.php?title=GlueX_TOF_Meeting,_November_17,_2015&oldid=71436</a>"</div>
</div>
</div>
</div>
<div id="footer" role="contentinfo" style="color: rgb(0, 0, 0);
margin-top: 1em; border-top-width: 1px; border-top-style: solid;
border-top-color: rgb(170, 170, 170); direction: ltr; font-family:
'Times New Roman'; font-size: medium; 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: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px;
background: white;">
<ul id="f-list" style="list-style-type: square;">
<li id="lastmod">This page was last modified on 17 November
2015, at 15:17.</li>
</ul>
</div>
<br>
</body>
</html>