[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: tagger field map



Hello Richard,

Sure, that's what I am doing now. I will send you
updated geometry during this week.

Cheers,
        Sascha


On Tue, 13 Jan 2009, Richard Jones wrote:

> Sascha,
>
> Could you shift the magnets and the map in the gxtwist geometry to agree with 
> the new positions?  The map is placed using the Regions tag in the hdds 
> geometry document.  The hardware and the map should be shifted together.
>
> Richard Jones
>
>
> Alexander Somov wrote:
>> 
>> Hello Richard,
>> 
>> The magnetic field map in the tagger hall seems
>> to be shifted by a few cm in the MC.
>> 
>> According to the table 4.2 in the technical design
>> report (updated for the review), the position of
>> 12 GeV electrons at z=26.301 m should be x = -4.7576 m.
>> However, I get x = -4.803 m, see the plot attached.
>> Are the numbers in the table 4.2 correct ?
>> 
>> I used the same reconstruction code as before but just
>> replaced the magnetic field map (do I need to shift the
>> map ?)
>> 
>> Could you please check. I want to finish with updating
>> geometry asap.
>> 
>> Thanks,
>>        Sascha
>> 
>> P.S. The full-energy deflection angle in the magnet is
>> correct, 13.4 deg.
>
>