XRT(JT,IT): X position at entrance of JT'th region for IT'th track.
YRT(JT,IT): Y position ...
ZRT(JT,IT): Z position ...
URT(JT,IT): X directional cosine at entrance to JT'th region.
VRT(JT,IT): Y directional ...
WRT(JT,IT): Z directional ...
ERT(JT,IT): total energy of the particle as it enters the JT'th region.
TRT(JT,IT): time at which IT'th particle enters the JT'th region.
SRT(JT,IT): total path length of the IT'th track in the JT'th region.
EIONT(JT,IT): ionization energy loss of the IT'th track in the JT'th region. In general, this is the visible energy for active media.
EDEPT(JT,IT): energy loss other than ionization energy (e.g. losses to multiple scattering, nuclear interactions, residual nuclear excitation from photo-nuclaer interactions, rest masses losses from stopping charged particles, etc.) This energy may or may not be visible.
Showering_tracks
For showering track segments one has these definitions:
XRT(JT,IT): energy* weighted X position in the JT'th region.
YRT(JT,IT): energy weighted Y position ...
ZRT(JT,IT): energy weighted Z position ...
URT(JT,IT): energy weighted X directional cosine ...
VRT(JT,IT): energy weighted Y directional cosine ...
WRT(JT,IT): energy weighted Z directional cosine ...
ERT(JT,IT): =-1. not defined for showering tracks.
TRT(JT,IT): energy weighted time ...
SRT(JT,IT): total path length of the IT'th track in the JT'th region.
EIONT(JT,IT): ionization energy loss. Most EGS energy depositions are considered to be ionization losses.
EDEPT(JT,IT): other energy depositions, e.g. energy losses arising from user requested discards.
(*Note: Here energy refers to energy actually deposited in the region in question.)
Drift_Chamber
Central drift chamber information is contained in the arrays
described below. The index IH refers to hit#, i.e. IH=1 to
NHTDCT(IT) ( NHTDCT .le. 100 )
NHTDCT(IT): number of drift chamber hits for this track ILAYT(IH,IT): layer number of IH'th hit on IT'th track. ICELLT(IH,IT): cell number of IH'th hit on IT'th track. IWIRET(IH,IT): wire number of IH'th hit on IT'th track. TIMET(IH,IT): time in ns of IH'th hit on IT'th track.
Note that TIMET(IH,IT) is the sum of the absolute time (actually the time relative to t=0 for the event) at which the particle crosses the drift trajectory in question determined by the time at which the particle crosses the drift trajectory in question and the drift time to the wire. Furthermore a small correction corresponding to the variation in time with Z position along the wire is included (see HELP UMC CONPAR MODRFT ).
Note that a given wire can be struck more than once, by either the same or different tracks.
Range_Chamber_arrays
NHRSC(IT): Number of range chamber hits on the IT'th
track
ICHRSC(IH,IT): Chamber number for the IH'th hit on the
IT'th track.
Note RS chambers are numbered 1-24 for
the inner layer and 25-48 for the outer
layers.
IWRSC(IH,IT): wire number within the chamber.
XRSC(IH,IT), : X,Y, and Z positions for the hit. These YRSC(IH,IT), &: positions are relative to a rotated "sector ZRSC(IH,IT) : coordinate system", where, e.g., X=0 corresponds to the center of the chamber. (See GEOMETRY COORDINATE_SYSTEM.)
TRSC(IH,IT): time in ns of the IH'th hit on the IT'th track.