ASCII Output File Format (pre-Nov 98)

For the first round of analysis, the digitization etc output will be in the form of an ASCII file that will be translated into other formats. Here is the layout of the file.

Subsystems are alphabetically ordered by name and their data is delimited by their name as the first line and 'end' as the last.

AEventMarker

run & event #

EMCalorimeter, HADCalorimeter (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)

Note: the sample file has not been updated to reflect the coordinates at the front face.

Tracker

# hits in the tracker

List of hits:

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

Tracks

# fitted tracks

List of tracks

momentum (px,py,pz)        origin point (x,y.z)         charge         MC pointer

VXD

# hits in the VXD

List of hits:

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

Example file for single muon.

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.

R.Dubois Last Modified: 01/13/04 12:54