[Eg6_analysis] couple of problems

[Stepan Stepanyan]

Hi Lamiaa,

Your point is well taken. Reason I started with this file is it was on the
cache disk. Later I was jcache another file from your good run list.
But the point I want to make here is that we might have good runs
that have last one or may be few files are bad. This runs must be
some how saved. This DAQ issues could also be source of what you
noticed in your previous email. Some runs may had DAQ problems
but they may never being reported.
Any way I will keep digging. Will be interesting if you can cook this
file and also A15 with your user_ana.

Regards, Stepan

On 1/21/11 5:09 PM, Lamiaa El Fassi wrote:
> Hi Stepan,
>
> Since you are testing a 6 GeV run, I have never cook more than 10 
> files for this run period.
> So, what you noticed for clas_61540.A14 must be also true for A15 and A16.
>
> By the way, if you look to the sheet summary of the eg6 production 
> runs that I sent you
> earlier (I put it again in attachment) you will find a comment about 
> the DAQ crash on it.
> Please for your convenience revise this file on you further test. The 
> objective of generating
> this file was to have a list of good runs and make a decision about 
> some runs that I was
> suspicious about them in my comments.
> I will appreciate your (you and others) feedback about this list.
>
> Best regards,
>
> Lamiaa
>
> ************************************************************
> *  Lamiaa El Fassi             email: elfassi at jlab.org 
> <mailto:elfassi at jlab.org>
> *  Research Associate @ Rutgers University
> *  Phone: (757) 269-7011 // Fax: (757) 269-5703
> *  Jefferson Lab., 12000 Jefferson Ave.
> *  Suite# 4, MS 12H3
> *  Newport News, VA. 23606
> ************************************************************
>
>
> On Fri, Jan 21, 2011 at 3:51 PM, Stepan Stepanyan <stepanya at jlab.org 
> <mailto:stepanya at jlab.org>> wrote:
>
>     Dear all,
>
>     In doing my studies with pass1 outputs I noticed couple of
>     problems (so far).
>     These could be problems of cooking, it is possible that I am not
>     using right
>     stuff for it. But never the less I want to see if any one has any
>     thoughts on these.
>
>     Firs problem I encountered is in cooking of file clas_061540.A14.
>     I run only 100K
>     and in Ntuple I got strange events at last 15%. In the attached
>     file r61540_14.ps <http://r61540_14.ps>
>     you will find thee graphs, showing event ID vs. momentum of the
>     first particle
>     in EVNT. As you can see at the end of 100K events I got tracks in
>     the first row of
>     EVNT with fixed momentum. It turns out most of them are positive
>     particles (see
>     second and third pages). Looking into output of user_ana, I can
>     see that massages
>     that tracking code prints out when number "ntr_link" exceeds max
>     value stopped
>     somewhere after 83293 events (attached file r61540_14.tiff). I
>     looked in the logbook
>     and seems like this run crushed at the end, but there are files
>     A15 and A16 of this
>     run and I do not know if we have seen problem with this files as well.
>
>     Second problem I see is related with ICPB. Attached file
>     ic_hits.ps <http://ic_hits.ps> shows distribution
>     of relative energy of central crystal as a function of cluster
>     energy from ICPB and
>     ICHB. Clearly ICPB plot is wrong. Energy of clusters run above 7
>     GeV and central crystal
>     has more than 100% of cluster energy, impossible. Plot from ICHB
>     is normal, as one
>     would expect. Some thing is wrong in the transition from ICHB to
>     ICPB. Must be
>     corrected.
>
>     Finally I want to emphasize that looking into cooked data, running
>     simple analysis
>     are very important. We need to find and fix problems before pass1
>     cooking. Any
>     inputs on above issues will be appreciated.
>
>     Regards, Stepan
>
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