LPROTO version 0.03 User Guide

LPROTO version 0.03 User Guide (?)

(Last update of this page: 02-Feb-2001 T. Mashimo)

FFREAD data cards


Geometry

NPMT nxpmt nypmt nzpmt
Numbers of PMTs in x, y, and z directions.
The default values are 6, 6, and 8.
The z-axis goes along the direction of the incident photon beam. The y-axis points upward.
The z = 0 is located at the boundary between the liquid Xe and the quartz glass window of the PMTs on the front-side.

PMTINT distance
Distance between two adjacent PMTs in cm.
The default is 6.2cm.

Event kinematics

KINE mode ... (the 2nd arguments onward depend on the ``mode'')
The ``mode'' is an integer, the rest are floating point numbers.


Xe scintillation light tracking

XESCTRACK iflag
iflag = 1 enabels the tracking of Xe scintillation light.
iflag = 0 dislables it.
The default is 1.

XESCENERGY energy
Energy loss (in eV) for creating one scintillation photon. The default is 24.0 eV.

XESCPOISSON iflag
iflag = 1 enabels Poisson fluctuation in the number of scintillation photons to be generated.
iflag = 0 disables the fluctuation.
The default is 1.

XESCRFRIDX index
Refractive index of liquid xenon (which determines the light velocity).
The default is 1.5655.

XESCRAYL iflag
iflag = 2 enables Rayleigh scattering of Xe scintillation light in the liquid Xe;
the scattering angle is generated according to 1+(cos(theta))**2.
iflag = 1 enabels Rayleigh scattering of Xe scintillation light in the liquid Xe;
scattering is isotropic.
iflag = 0 disables Rayleigh scattering.
The default is 2 (it was 1 for v0.02).

XESCDRAYL distance
Mean Rayleigh scattering length in cm.
The default is 30.0 cm.

XESCABSO iflag
iflag = 1 enabels absorption of Xe scintillation light in the liquid Xe.
iflag = 0 disables it.
The default is 0.

XESCDABSO distance
Mean absorption length in cm.
The default is 110.0 cm.

XESCREFL iflag
iflag = 1 enabels the reflection of Xe scintillation light on the detector inner walls.
iflag = 0 disables it; photons are absorbed in the walls.
The default is 0.

XESCEREFL eff
Efficiency of the reflection on the inner walls.
The default is 0.6.


Histogramming

HIST filename
The ``filename'' is the name of the output HBOOK file.

NTUPLE iflag
iflag = 1 enables creation of the standard ntuple in the HBOOK file.
iflag = 0 disables the creation of the ntuple.
The default is 0.
When no HIST data card is specified, the ntuple creation is automatically disabled.

Graphics

META filename
The ``filename'' is the name of the output PostScript file.

PLOT event1 event2
plots events from event1 to event2.
When no PLOT data card is specified, no plots will be created.

CUTXYZ cut
The momentum threshold (in MeV/c) for subroutine GUSTEP to store the position of the current particles for later drawing.
The default is 0.0 MeV/c.

Tetsuro Mashimo 02-Feb-2001