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Re: None GPS Point Source problem (Mark Polsen)
Re: None Re: GPS Point Source problem (Jeremy McCormick)
Re: None Re: GPS Point Source problem (Mark Polsen)
Date: 05 Apr, 2004
From: Jeremy McCormick <Jeremy McCormick>

Mark,

Okay, now that I understand a bit better --- I have actually done something similar.

The way I did it was to determine the angular distribution required by the radius and the starting distance from the detector and then set the momentum distribution accordingly using min/max theta/phi:

  /gps/position 0 0 100 cm
  /gps/type Point

  /gps/angtype iso
  /gps/mintheta 0 deg
  /gps/maxtheta 10 deg

  /gps/minphi 0 deg
  /gps/maxphi 360 deg

This will fire into a cone that is determined by the theta/phi values, where theta is constraining the radius.

Perhaps one of the GPS maintainers has a more direct solution.

--JM

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1 None: Re: GPS Point Source problem   (Mark Polsen - 05 Apr, 2004)
1 None: Re: GPS Point Source problem   (shami71@yahoo.com - 17 Mar, 2006)
5 None: Re: GPS Point Source problem   (sharmila - 17 Mar, 2006)
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