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Home » R3BRoot » Simulation Issues » Definiton of Glad center of Glad magnetic field map center (two questions on the Glad geometry definition and field map definition)
Definiton of Glad center of Glad magnetic field map center Wed, 31 August 2016 17:46
 sunny Messages: 1Registered: July 2016 occasional visitor From: *extra.cea.fr
Hello,

I have two questions on the Glad geometry definition and field map definition:

1)
From the create_glad_geo.C,
>>>Double_t DistanceToTarget = 350.0; //cm
>>>Double_t Correction = -119.94; //cm
>>>...
>>>t0->RotateY(+7.3);

Therefore, I think the distance of glad to the target-center will be 350-119.94 = 230.06cm, with an angle of 7.3deg.
But I'm not sure this distance is relative to which point of Glad. To be specific, what is the coordinate definition in the create_glad_geo.C macro ?

2) There is one magnetic field map under R3BROOT/field/magField/R3B/R3BGladMap.dat, the format is x/y/z/Bx/By/Bz. The x/y/z definition is relative to which frame ? Is it the same as the geometry definition in question 1 ?
In the R3BGladFieldMap.cxx, the translation from lab to local frame of the magnet is done using 14*deg rotation and the transporation gTrans is (0,0,-113.4), which seems not consistent with the values in the geometry defition. I'm confused.

Best regards,
Yelei

 Definiton of Glad center of Glad magnetic field map center By: sunny on Wed, 31 August 2016 17:46 Re: Definiton of Glad center of Glad magnetic field map center By: Dmytro Kresan on Wed, 14 September 2016 14:53
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