GLAST LAT Offline Software Core review, Jan. 17, 2001

Simulation: Status and PlansSimulation: Status and Plans

Toby: Overview, gismo

Masanobu: Hit design, G4

GLAST LAT Offline Software Core review, Jan. 17, 2001

Introduction, T. Burnett 2

A look back to 21 June 1999A look back to 21 June 1999

glastsim.xml

glastsim

.irf

instrument.xml

.tup

merit

run parameters

instrument description

create instrument response

read back response

reconstruct,

write output ntuple

standardanalysis

GLAST LAT Offline Software Core review, Jan. 17, 2001

Introduction, T. Burnett 3

Now:Now:

• It is “GlastSim”, WBS 4.1.D.2

GLAST LAT Offline Software Core review, Jan. 17, 2001

Introduction, T. Burnett 4

Simulation in five easy piecesSimulation in five easy pieces

1. Source description, including spectrum, rate, angular dependence, geomagnetic latitude, orbit orientation, GLAST inclination 

2. External geometry description

3. Concrete rendering of the detector for the simulation package 

4. Generation of hits (and thus a definition of the hit classes.)

5. Conversion of hits to digis for analysis

GLAST LAT Offline Software Core review, Jan. 17, 2001

Introduction, T. Burnett 5

Traudl’s pictureTraudl’s picture

1

2

34

5

GLAST LAT Offline Software Core review, Jan. 17, 2001

Introduction, T. Burnett 6

Simulatation status, plansSimulatation status, plans

• Old glastsim converted to packages, still in use. Output available as Gaudi event service. Start of display.

• Geometry interface – (Joanne’s talk) not critical path for balloon• Simulation as a Gaudi service:

– Geant4: LHCb has done it?– Gismo: on TO-DO list for THB

• Hit classes for interface to digi code: see Masanobu’s talk.