[Eg6_analysis] couple of problems

[Stepan Stepanyan]

Seems like only one file was transmitted.
Here the others.

Stepan

On 1/21/11 4:51 PM, Stepan Stepanyan 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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