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digitisation
include
libgem.h
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//
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// libgem.h: Header file for libgem.o:
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// Library with functions for parametrized charge transfer
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// (single GEM coefficients + Effective Gain and Ion Feedback
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// Author: Sven Lotze
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#ifndef LIBGEM_H
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#define LIBGEM_H
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// Chamber Parameters
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enum
parameters { DRIFT, GEM1, TRANS1, GEM2, TRANS2, GEM3, IND };
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//
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// Attributes of each single GEM
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//
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// Calculate Electric field in GEM hole from GEM voltage
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double
holefield(
double
gemvoltage,
double
upperfield,
double
lowerfield );
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// Calculate gain of a GEM
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double
gain(
double
gemvoltage,
double
upperfield,
double
lowerfield );
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// Calculate collection efficiency of a GEM (differentiating ions/e-)
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double
ecoll(
double
field,
double
gemvoltage );
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double
Icoll(
double
field,
double
gemvoltage );
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// Calculate extraction efficiency of a GEM (differentiating ions/e-)
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double
eextr(
double
field,
double
gemvoltage );
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double
Iextr(
double
field,
double
gemvoltage );
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// Calculate secondary extraction efficiency (for ions) of a GEM
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double
sextr(
double
fromfield,
double
gemvoltage,
double
tofield );
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// Calculate parallel plate multiplication for other fields (2mm)
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double
pgain(
double
field );
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//
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// Attributes of whole multi-GEM-structure
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//
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// Calculate effective gain
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double
effgain(
double
*params );
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// Calculate effective ion feedback (see thesis Sobloher p. 80)
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double
ionf(
double
*params );
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// Read charge transfer parameters from file
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// (instead of hardcoding as in previous versions)
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int
readpar(
const
char
*filename );
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#endif
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