[g13] Sector 4 problems in g13b data

[Paul Mattione]

The first 2/3rds of the g13b runs didn't have the DC alignment  
constants properly extended over the run range.  They used the old DC  
alignment constants, for which the largest problem was in Sector 4.   
2/3rds the way through cooking g13b the problem was noticed and  
corrected, and so the last ~1/3 of the g13b runs are fine (and all of  
g13a) (I don't remember which run number is the cutoff).  In Sector 4  
I believe the problem was on the order of 3%.

  - Paul

On Dec 3, 2009, at 10:41 AM, nivanov at jlab.org wrote:

Hi Pawel,

We analyzing all the runs for 1.3<Eg<1.5 GeV.

When you suggested to consider last 1/3 runs only?

Best,
Nickolay



> Dear Nickolay,
>
> Which runs are you analyzing? The last 1/3 I hope, as was suggested?
>
> Best Regards,
>
>    Pawel
>
> nivanov at jlab.org wrote:
>> Dear g13,
>>
>> Analyzing the azimuthal dependence of the deuteron  
>> photodisintegration
>> in g13b, we found surprising problems with Sector 4 (150<\phi<210).
>> Practically all the proton distributions in Sector 4 differ  
>> essentially
>> from corresponding ones in other sectors. In particular, in
>> http://www.jlab.org/~nivanov/Preliminary_mass.ppt
>> both the TOF and missing mass distributions of the proton are  
>> presented
>> for sectors 3 and 4 (at \teta>40). One can see a sizable  
>> difference...
>>
>> Do anyone know what takes place in sector 4?
>> TOF problems?
>>
>> Thank you,
>> Nickolay Ivanov
>>
>>
>>
>>
>> _______________________________________________
>> g13 mailing list
>> g13 at jlab.org
>> https://mailman.jlab.org/mailman/listinfo/g13
>>
>


_______________________________________________
g13 mailing list
g13 at jlab.org
https://mailman.jlab.org/mailman/listinfo/g13