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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.
>
>