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Question Question about the GPS User defined Hist. 

Keywords: GPS HIST
Forum: Event and Track Management
Date: 14 Sep, 2005
From: Dennis Haggerty <Dennis Haggerty>

Question about the GPS User defined Hist.

I need to put in a spectra that is not a simple fit.  
I am trying to use the User defined histogram for this.  
When I put in the histogram the resulting particles 
generally match the input spectra but they move up and 
down, like a piecewise fit was taking place but not doing 
a good job.  Is there a problem with my macro or is this 
a known effect.?  I've tried /gps/hist/inter Log, Lin, Exp 
and they all produce the same effect.

A copy of the plot can be found at:

http://sd-www.jhuapl.edu/ACE/EPAM/GEANT.htm

The macro in question is:

/control/verbose 0
/tracking/verbose 0
/run/verbose 0
/surveys/surveyPrimaries 1

/gps/particle proton
/gps/pos/type Surface
/gps/pos/shape Sphere
/gps/ang/type cos
/gps/radius 8.0 cm
/gps/pos/centre 0. 0. -1.5 cm
/gps/ene/type User
/gps/hist/type energy
/gps/hist/inter Log
/gps/hist/point 0.099	0.0
/gps/hist/point 0.1	1.5073e+07
/gps/hist/point 0.15	1.4144e+07
/gps/hist/point 0.2	1.3276e+07
/gps/hist/point 0.3	1.1915e+07
/gps/hist/point 0.4	1.0696e+07
/gps/hist/point 0.5	9.8093e+06
/gps/hist/point 0.6	9.0001e+06
/gps/hist/point 0.7	8.3556e+06
/gps/hist/point 1.	6.7666e+06
/gps/hist/point 1.5	5.0824e+06
/gps/hist/point 2.	3.8357e+06
/gps/hist/point 3.	2.4098e+06
/gps/hist/point 4.	1.5246e+06
/gps/hist/point 5.	980310
/gps/hist/point 6.	631590
/gps/hist/point 7.	427560
/gps/hist/point 10.	151070
/gps/hist/point 15.	37631
/gps/hist/point 20.	14352
/gps/hist/point 30.	4132.7
/gps/hist/point 40.	2212.2
/gps/hist/point 50.	1187.2
/gps/hist/point 60.	812.43
/gps/hist/point 70.	607.18
/gps/hist/point 100.	282.48
/gps/hist/point 150.	108.44
/gps/hist/point 200.	41.903
/gps/hist/point 300.	8.7416
/gps/hist/point 400.	1.8677
/gps/hist/point 500.	0.1


/run/beamOn 10000000


Any suggestions would be helpful

Thanks

Dennis

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1 None: Re: Question about the GPS User defined Hist.   (Fan Lei - 29 Sep, 2005)
3 None: Re: Question about the GPS User defined Hist.   (Fan Lei - 29 Sep, 2005)
1 Question: Re: Question about the GPS User defined Hist.   (Dennis Haggerty - 29 Sep, 2005)
(_ None: Re: Question about the GPS User defined Hist.   (Fan Lei - 29 Sep, 2005)
(_ Ok: Re: Question about the GPS User defined Hist.   (Dennis Haggerty - 29 Sep, 2005)
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