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Richard, Sean, Hovanes, et al.,<br>
<br>
First let me apologize for my mistake in attribution in the minutes.
Richard checked in the changes to have HDGeant get the bunch
frequency from the CCDB, not Paul. Thanks to him for doing that. I
will amend the minutes presently.<br>
<br>
As far as what the frequency actually is now, yesterday Paul said
that he had just come from a "master oscillator meeting" and that we
are running at 2 ns bunch spacing. I have the utmost respect for
both Paul and Hovanes, but they can't both be right here. ;-)<br>
<br>
-- Mark<br>
<br>
<div class="moz-cite-prefix">On 04/30/2015 11:32 AM, Sean Dobbs
wrote:<br>
</div>
<blockquote
cite="mid:CAEAoKm51gQBc=fYk_BXZK+vpTvEmS7-6hz_0s5NVY5mfgkQP0Q@mail.gmail.com"
type="cite">Thanks, Hovanes, for clearing this up, and sorry for
the confusion. I will update CCDB accordingly. <br>
<br>
---Sean<br>
<div class="gmail_quote">On Thu, Apr 30, 2015 at 9:48 AM Richard
Jones <<a moz-do-not-send="true"
href="mailto:richard.t.jones@uconn.edu">richard.t.jones@uconn.edu</a>>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div dir="ltr">Hovanes,
<div><br>
</div>
<div>That is what I thought. Thank you for the
clarification, Hovanes.</div>
</div>
</div>
<div>
<div dir="ltr">
<div><br>
</div>
<div>-Richard Jones</div>
</div>
</div>
<div>
<div class="gmail_extra">
<div class="gmail_quote">On Thu, Apr 30, 2015 at 10:38 AM,
Hovanes Egiyan <span dir="ltr">
<<a moz-do-not-send="true"
href="mailto:hovanes.egiyan@gmail.com"
target="_blank">hovanes.egiyan@gmail.com</a>></span>
wrote:<br>
</div>
</div>
</div>
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<div class="gmail_extra">
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<div>Hi Sean, <br>
MO signal that we have is at ~499MHz (and it will
be prescaled before arriving to TDCs to much lower
frequency),
<br>
but the beam bunches themselves should now arrive
to Hall D and the tagger hall at ~249MHz
frequency.
<br>
<span><font color="#888888">Hovanes. <br>
</font></span>
<div>
<div><br>
<br>
On 04/30/2015 09:53 AM, Sean Dobbs wrote:<br>
</div>
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<div class="gmail_extra">
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<blockquote type="cite">
<div dir="ltr">Hi Richard,<br>
<br>
<div>Are you using the latest version of the
CCDB constants? I updated the rf_period
yesterday based on the results of a
meeting Paul Mattione had on the MO. </div>
<div>
<p>I see the following results:<br>
<br>
farm1401> ccdb dump
/PHOTON_BEAM/RF/rf_period:2933 <br>
#Spring running is at ~2ns period <br>
2.004008 </p>
<p>From HDGeant: (Run 2933)</p>
<p> settofg: beam_bucket_period_ns set to
2.0040081 <br>
</p>
<p><br>
</p>
<p>---Sean</p>
<p><br>
On Thu, Apr 30, 2015 at 8:44 AM Richard
Jones <<a moz-do-not-send="true"
href="mailto:richard.t.jones@uconn.edu"
target="_blank">richard.t.jones@uconn.edu</a>>
wrote:</p>
</div>
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style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div>
<div dir="ltr">Hello Mark,
<div><br>
</div>
<div>From the minutes, "</div>
</div>
</div>
<div>
<div dir="ltr">
<ul
style="font-size:12.8000001907349px">
<li style="margin-left:15px"><b>HDGeant
now uses RF period in CCDB</b>.
Paul checked in a change such
that HDGeant will look up the
bunch frequency from the CCDB
when simulating electromagnetic
background. The current setting
in the database is 499 MHz.
</li>
</ul>
</div>
</div>
<div>
<div dir="ltr">
<div><span
style="font-size:12.8000001907349px">I
am not sure which change that
refers to, but yesterday I
checked in a change to HDGeant
that fits this description. The
current setting in the database
is close to 250 MHz, not 500
MHz. This is what I see when I
run hdgeant with a RUNNO set to
a number in the current range,
eg 2933:</span></div>
<div><span
style="font-size:12.8000001907349px"><br>
</span></div>
<div>
<pre style="color:rgb(0,0,0)"> settofg: beam_bucket_period_ns set to 4.0080161 </pre>
</div>
<div><span
style="font-size:12.8000001907349px"><br>
</span></div>
<div><span
style="font-size:12.8000001907349px">-Richard
Jones</span></div>
</div>
<div class="gmail_extra"><br>
</div>
</div>
<div>
<div class="gmail_extra">
<div class="gmail_quote">On Wed, Apr
29, 2015 at 4:30 PM, Mark Ito <span
dir="ltr">
<<a moz-do-not-send="true"
href="mailto:marki@jlab.org"
target="_blank">marki@jlab.org</a>></span>
wrote:<br>
</div>
</div>
</div>
<div>
<div class="gmail_extra">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0
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solid;padding-left:1ex">
<div bgcolor="#FFFFFF"
text="#000000">Folks,<br>
<br>
Please find the minutes below
and at<br>
<br>
<a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_April_29,_2015"
target="_blank">
https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_April_29,_2015</a><br>
<br>
-- Mark<br>
_________________________________________________<br>
<br>
<div>
<div>
<div><span dir="auto"></span>
<div>
<div dir="ltr"
lang="en">GlueX
Offline Software
Meeting<br>
<span>Minutes</span><br>
<br>
Present: <br>
<ul>
<li><b>CMU</b>:
Curtis Meyer </li>
<li><b>FSU</b>:
Aristeidis
Tsaris </li>
<li><b>JLab</b>:
Mark Ito
(chair), David
Lawrence, Paul
Mattione, Kei
Moriya, Nathan
Sparks, Justin
Stevens, Simon
Taylor
</li>
<li><b>NU</b>:
Sean Dobbs </li>
</ul>
<br>
<span>Announcements</span><br>
<ul>
<li><b>Nightly
build results
on web</b>.
Mark has put the
<a
moz-do-not-send="true"
rel="nofollow"
href="https://halldweb.jlab.org/nightly/nightly_build_errors.txt"
target="_blank">
summary of
nightly build
errors and
warnings</a>
on the web. He
led us through
the
<a
moz-do-not-send="true"
rel="nofollow"
href="https://mailman.jlab.org/pipermail/halld-offline/2015-April/002015.html"
target="_blank">
email</a>
announcing it. </li>
<li><b>HDGeant now
uses RF period
in CCDB</b>.
Paul checked in
a change such
that HDGeant
will look up the
bunch frequency
from the CCDB
when simulating
electromagnetic
background. The
current setting
in the database
is 499 MHz.
</li>
</ul>
<br>
<span>Review of
minutes from April
15</span><br>
<br>
We went over the <a
moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_April_15,_2015#Minutes"
title="GlueX
Offline Meeting,
April 15, 2015"
target="_blank">
minutes from last
time</a>. <br>
<br>
David gave us an
update on his Geant4
implementation. He
as put in the FDC
and FCAL and can
reconstruct tracks
in the FDC with
resolution
comparable with
those found with
HDGeant. He ran into
an issue with
multi-threading; a
bug report has been
submitted to the
Geant4
Collaboration. <br>
<br>
<span>Offline
Monitoring</span><br>
<br>
Kei reported he has
run over most of the
files collected in
the last week of
data-taking. The
volume of data is
small, it only takes
a few hours to run
over everything.
<br>
<br>
We then discussed
doing a final run
over the Fall data
so that people can
use the data to
prepare for the
collaboration
meeting. There is a
change to get the
setting of the
F1-TDC parameters
from the CCDB that
Justin checked in
yesterday. There are
also new TOF timing
constants that we
are not taking
advantage of yet. In
addition Lubomir
also has new FDC
alignment numbers.
For all of these
reasons a re-run
seems desirable but
time is running
short to have the
data available in
time to be useful.
We agreed on a
launch time target
at the end of the
day on Friday. <br>
<br>
There was a bit of
discussion of what
data we have from
the current run.
Most of it is in run
2931, which is
contained in just
over 100 files and
has about 75 million
events. Data were
taken in mode 7 with
an FCAL-BCAL
trigger.
<br>
<br>
<span>Spring 2015
Commissioning
Simulations</span><br>
<br>
Sean described the <a
moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/Spring_2015_Commissioning_Simulations"
title="Spring 2015
Commissioning
Simulations"
target="_blank">
conditions</a> he
is proposing and
solicited feedback.
The software has
been tagged but not
released. Paul noted
that the nominal
position of the
coherent peak is 3.4
GeV. The gxproj4
account will be used
to run the jobs.
<br>
<br>
On a side note, Mark
has put in a request
to the Computer
Center for a <a
moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX-related_shared_accounts_on_the_JLab_CUE"
title="GlueX-related
shared accounts on
the JLab CUE"
target="_blank">
gxproj5</a>
account. <br>
</div>
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