[Eg6_analysis] couple of problems

[Lamiaa El Fassi]

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
*  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> 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
> 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 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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> Eg6_analysis at jlab.org
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>
>
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