ASCII Output File Format

Ascii output files containing "events" are produced by the Gismo full simulation, by the fastMC, and ultimately will be produced by the full reconstruction as well. The types of data present for each event in the file depend on the generating program, but are always a subset of the following:

• MC particle information (Gismo, fastMC, full recon)
• Calorimeter hit information (Gismo, full recon)
• Track information (fastMC, full recon)
• Tracker, VXD hit information (Gismo)
• Calorimeter cluster information (fastMC, full recon)
• Muon system strip hits (Gismo)
  

In the detailed description below, subsystems are alphabetically ordered by name. Their data is delimited by their name as the first line and 'end' as the last. Several subsystems have packed hit identifiers. See the reference geometry page for their definitions.

See here for the pre-November '98 format.

AEventMarker

run & event #

EMCalorimeter, HADCalorimeter, LUMCalorimeter, MUCalorimeter (same format)

# hits

List of hits

(packed) hit ID         energy deposit (GeV)

# contributing MC particles

list of  MC particle contributions

MC particle pointer        energy deposit by that particle

MCPrint

# MC particles

List of particles:

MC pointer    parent MC pointer    PDG particle type    GISMO status code    charge     termination point    initial 4-momentum (position at Cal front face) (dir cosines at front face)

Tracker

# hits in the tracker

List of hits:

hit #    position of hit (x,y,z)         energy deposit         time    MC pointer

Calorimeter Clusters

# clusters

List of clusters::

energy <phi> <theta> <R> phi-RMS Theta-RMS R-RMS

# hits (for FastMC, this will be zero)

List of hits

(packed) hit id    energy

List of MC parents

MC pointer

VXD

# hits in the VXD

List of hits:

hit #    position of hit (x,y,z)         energy deposit         time    MC pointer

MUStripSystem

# hits in the strip system

List of hits:

packed hit ID

# contributing MC particles

list of pointers to contributing particles

MC pointers

Notes:

• GISMO has a PRIMARY particle, which is a fake. It is the first in the list and has a zero parent pointer.
• MC particles that are parts of showers in the calorimeter are suppressed. However, albedo can dribble back in to the central detector and create hits. These are attributed to the shower particles, but they never appear in the MC list. For the moment, these can be treated as background in the central detector.
• calorimeter means and RMS' are energy weighted.

R.Dubois Last Modified: 01/13/04 12:37