CHERENKOV INPUT

The file, cherenkov.pilot, contains input information for cherenkf7. A line with no asterisk is a comment line. The comments in the file make it self-explanatory (hopefully). Should you wish to use a pilot file with a different name, just enter the name of the file on the cherenkf command line. If there is no name on the command line, the default is cherenkov.pilot.


                --- CHERENKOV LIGHT GENERATOR PILOT ---

January 2007

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This file is the pilot file for the light-producing cherenkf7.c code

Any line not starting with an '*' is a comment line.
Any data line must have a 5 character flag following the *.

Segment input filename. default: stdin
 SEGIN Data/photon.seg

Output photon file. default: stdout
* PHOUT ./Data/MCPhotons/photon.cph

Telescope configuration file describing telescopes
* ARRAY ./Config/Files/veritas2tel.cfg

Cherenk needs 2 negative integer as random number generator seeds.
* SEEDS -10777 -32656

Primary impact range (meters) in plane of center telescope.
* IMPDS 0.0 50.0

Global efficiency to reduce the number of output photons.
The global efficiency reduces the number of output photons but
the following grisudet code returns them correctly as long as the
global efficience is less than the maximum quantum efficiency. (see
comment at end of this file for further explanation).
* GQEFF 0.34

Path and filename of the atmospheric extinction paramenters.
* KEXTN Simulation/Cherenk/kextint.dat

lateral distribution option (default, no asterisk, normal operation).
use a floating point number (with decimal point).  This record sets
the radius of the single telescope to a "large" value (see comment
at the end of this file). 
Use with single-telescope configuration file only !!!!!!!!!!!
 LATDS 100.0

atmospheric extinction flag (default 1 - atmosph. extinct is on)
 EXTIN 0

Comments:
The primary impact range is always a circle (or a circular annulus
if rmin != 0). The circle is defined in the plane perpendicular to the
primary with the center telescope at (0,0). Thus, the projection of this circle on the ground plane is an ellipse.

The global efficiency reduces a Monte-Carlo rejection to reduce the
number of photons output from cherenkf. The number rejected is recovered in grisudet.c by dividing the quantum efficiency by the global efficiency before the Monte-Carlo test for producing a photoelectron.  This technique relies on the global efficiency being less than the quantum efficiency for all photon wavelengths.

lateral distribution option. Photons striking the ground within
this given radius are kept, for example  * LATDS 300.0. Default (no
asterisk) is normal operation retaining photons within telescope(s).
Use with single telescope configuration file

If EXTIN has no asterisk or is 1, atmospheric extinction is on.
IF EXTIN is zero, atmospheric extinction is off.





Segment input filename. default: stdin
SEGIN kascade.seg

Output photon file. default: stdout
* PHOUT Data/MCPhotons/test.cph

Telescope configuration file describing telescopes
* ARRAY ./Config/Files/veritas4tel.cfg

Cherenk needs 2 negative integer as random number generator seeds.
* SEEDS -10771 -32656

Primary impact range (meters) in plane of center telescope.
* IMPDS 0.0 300.0

Global efficiency to reduce the number of output photons.
* GQEFF 0.34

Path and filename of the atmospheric extinction paramenters.
* KEXTN Simulation/Cherenk/kextint.dat

lateral distribution option (default, no asterisk,
normal operation).use a floating point number(with decimal point).
Use with single telescope configuration file.
LATDS 100.0

atmospheric extinction flag (default 1 - atmosph. extinct is on)
EXTIN 0


Comments:
The primary impact range is always a circle (or a circular annulus
if rmin != 0). The circle is defined in the plane perpendicular to the
primary with the center telescope at (0,0). Thus, the projection of this
circle on the ground plane is an ellipse.

The global efficiency reduces a Monte-Carlo rejection to reduce the
number of photons output from cherenkf. The number rejected is recovered
in grisudet.c by dividing the quantum efficiency by the global
efficiency before the Monte-Carlo test for producing a photoelectron.
This technique relies on the global efficiency being less
than the quantum efficiency for all photon wavelengths.

lateral distribution option. Photons striking the ground within
this given radius are kept, for example * LATDS 300.0. Default (no
asterisk) is normal operation retaining photons within telescope(s).
Use with single-telescope configuration file

If EXTIN has no asterisk or is 1, atmospheric extinction is on.
IF EXTIN is zero, atmospheric extinction is off.