[g13] Sector 4 problems in g13b data

[Pawel Nadel-Turonski]

Nickolay,

Yes, this is what v2 stands for.

    Pawel

nivanov at jlab.org wrote:
> Hi Paul,
>
> Thank you for explanations.
> Note also that the quantities (\Delta p/p) in Sector 4 is not so small
> that you believe: they want to be about 20% for \teta>40.
>
> Do anybody remember where was cutoff between 'good' and 'bad' runs?
> Could this cutoff separate v1 and v2?
>
> Thank you,
> Nickolay
>
>
>
>   
>> 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
>>>>
>>>>
>>>>
>>>>
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>>     
>
>
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