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Hi All,<br>
<br>
It looks like Simon identified the problem. The phase offset
parameter<br>
in the data base is wrong. It is set to one while it should be zero.<br>
This has the consequence that about a 1/6 th of all events are off
by<br>
20ns.<br>
I am currently checking what the else will go wrong with the phase<br>
parameter is set to zero. I assume the overall timing offset for the
TOF<br>
will be off by 4 ns. This is part of Mikes general calibration.
Hence I <br>
include him in this email.<br>
<br>
cheers,<br>
Beni<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 11/09/2015 09:02 AM, Beni Zihlmann
wrote:<br>
</div>
<blockquote cite="mid:5640A791.4070207@jlab.org" type="cite">
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Some Additional Information:<br>
<br>
This event 72 has plenty of TOF Hits however the code does not <br>
make any good TOFPaddleHits out of them and as a consequence<br>
there are no TOFPoints! <br>
See below the list of TOFHits that show clearly that there should<br>
be TOFPaddleHits and TOFPoints in this event!<br>
<br>
Another question is, why does the hdview2 display show TOF Points<br>
indicated by the small circles but the analysis code does
not!!!!!!<br>
<br>
72 NO TOF POINT FOUND around -56 / -52.8306 0<br>
TOF POINTS: 0<br>
TOF PADDLE HITS: 0<br>
TOF HITS:<br>
1 14 0 21.9892 0.00180846<br>
1 19 0 18.9116 0.00340961<br>
1 14 1 15.9522 0.00282884<br>
1 19 1 20.0516 0.00300154<br>
0 13 0 22.5638 0.00196538<br>
0 19 0 -24.383 3.38461e-05<br>
0 26 0 21.1689 0.00260192<br>
0 27 0 21.1554 0.00268269<br>
0 29 0 177.607 0.000225769<br>
0 13 1 16.8317 0.00314423<br>
0 26 1 18.682 0.00251154<br>
0 27 1 18.361 0.00305077<br>
0 29 1 181.224 0.000116923<br>
1 14 0 -1.1103 0<br>
1 16 0 2657.98 0<br>
1 17 0 2148.19 0<br>
1 19 0 -6.62601 0<br>
1 21 0 2656.27 0<br>
1 19 0 1301.28 0<br>
1 26 0 449.838 0<br>
1 14 1 -8.18142 0<br>
1 16 1 2657.57 0<br>
1 17 1 2148.19 0<br>
1 19 1 -4.21791 0<br>
1 19 1 1301.18 0<br>
1 21 1 2656.77 0<br>
1 26 1 451.372 0<br>
0 13 0 -1.64007 0<br>
0 26 0 -4.20047 0<br>
0 27 0 -4.11068 0<br>
0 29 0 154.786 0<br>
0 13 1 -7.93381 0<br>
0 23 1 2655.92 0<br>
0 26 1 -6.16121 0<br>
0 27 1 -6.42895 0<br>
0 29 1 158.365 0<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 11/09/2015 08:06 AM, Beni Zihlmann
wrote:<br>
</div>
<blockquote cite="mid:56409A54.1080008@jlab.org" type="cite">Hi
All, <br>
attached is a screen shot of event 72 of run 3179. There are 2
tracks <br>
that go forward and hit the FCAL. There are also several TOF
paddles hit <br>
as indicated by the viewer. However non of the DTOFPoints that
are <br>
calculated from the TOF paddle hits overlap with any of the FCAL
hits <br>
or the two tracks that are associated with the FACL hits. As a
result <br>
the tracks do not have any match points with the TOF. <br>
This can't be right. Something must be going wrong in our code!
<br>
This is also seen by Elton who pointed out that the matching
efficiency <br>
of a charged track that does match with an FCAL shower with the
TOF <br>
is very bad. This efficiency should be close to 100% but it is
way lower <br>
more like 50%. Again, I think this is a problem somewhere in our
code <br>
not the detector itself. <br>
<br>
cheers, <br>
Beni <br>
<br>
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