Rate estimates on the Gem Disks

Transcription

1 Rate estimates on the Gem Disks PANDA Collaboration Meeting, GSI Darmstadt,

2 1 Geometry and Simulation code 2 Rate estimate 3 Backup (pictures only)

3 1 Geometry and Simulation code 2 Rate estimate 3 Backup (pictures only)

4 see pandaroot/macro/gem/create gem rootgeo.c

5 Geometry Four disks using Argon gas as material disk nr. thickness (gas) inner radius outer radius z position cm 5 cm 42 cm 90 cm cm 5 cm 42 cm 120 cm cm 5 cm 66 cm 150 cm cm 5 cm 90 cm 180 cm (guess) Code See pandaroot/gem and pandaroot/macro/gem Simple detector implementation: PndGemDetector::CbmDetector, PndGemMCPoint::CbmMCPoint Point Data: entry & exit point and energy loss stored (like in MVD)

6 Geometry Four disks using Argon gas as material disk nr. thickness (gas) inner radius outer radius z position cm 5 cm 42 cm 90 cm cm 5 cm 42 cm 120 cm cm 5 cm 66 cm 150 cm cm 5 cm 90 cm 180 cm (guess) Code See pandaroot/gem and pandaroot/macro/gem Simple detector implementation: PndGemDetector::CbmDetector, PndGemMCPoint::CbmMCPoint Point Data: entry & exit point and energy loss stored (like in MVD)

7 Example: McPoints & energies DPM 15.0 GeV/c

8 1 Geometry and Simulation code 2 Rate estimate 3 Backup (pictures only)

9 Simulations DPM pp at 1.5 GeV/c 6.0 GeV/c 15.0 GeV/c UrQMD pc at 15.0 GeV/c events each Only central solenoid field map Assumed an event rate of s 1 Included beam pipe and MVD as material No central tracker used... now some pictures

10 Simulations DPM pp at 1.5 GeV/c 6.0 GeV/c 15.0 GeV/c UrQMD pc at 15.0 GeV/c events each Only central solenoid field map Assumed an event rate of s 1 Included beam pipe and MVD as material No central tracker used... now some pictures

11 DPM 15.0 GeV/c

12 DPM 15.0 GeV/c

13 Remarks Maximum rate of /(cm 2 s) in central region (r=5cm) for pp at 15 GeV/c; More to be expected from pau fixed eventrate: s 1 DPM contains only hadronic (el. & inel.) interactions relatively more rate at low angles expected GEMs had no structure, gas mixture was plain Argon Simulation done with beam pipe and MVD, no tracker Readout resolution requirements can be matched to the projected track paths

14 Remarks for the software Many similarities to the MVD forward disks: Strip or pixel like digitization, clusterfinding & reconstruction Data classes & Parmeter database. Someone needed to create the Interface to the Kalman etc. and the Digi & Reco code I recommond to reuse these structures. Identified ToDo list (ordered) 1 Point smearing task & plug to tracking/genfit 2 More realistic geometry description (passive material) 3 Digitization & hit reco I will not do this, but I ll be there to help.

15 Remarks for the software Many similarities to the MVD forward disks: Strip or pixel like digitization, clusterfinding & reconstruction Data classes & Parmeter database. Someone needed to create the Interface to the Kalman etc. and the Digi & Reco code I recommond to reuse these structures. Identified ToDo list (ordered) 1 Point smearing task & plug to tracking/genfit 2 More realistic geometry description (passive material) 3 Digitization & hit reco I will not do this, but I ll be there to help.

16 Remarks for the software Many similarities to the MVD forward disks: Strip or pixel like digitization, clusterfinding & reconstruction Data classes & Parmeter database. Someone needed to create the Interface to the Kalman etc. and the Digi & Reco code I recommond to reuse these structures. Identified ToDo list (ordered) 1 Point smearing task & plug to tracking/genfit 2 More realistic geometry description (passive material) 3 Digitization & hit reco I will not do this, but I ll be there to help.

17 Thanks for listening.

18 1 Geometry and Simulation code 2 Rate estimate 3 Backup (pictures only)

19 DPM 1.5 GeV/c

20 DPM 6.0 GeV/c

21 DPM 15.0 GeV/c

22 UrQMD pc 15.0 GeV/c

23 DPM 1.5 GeV/c

24 DPM 6.0 GeV/c

25 DPM 15.0 GeV/c

26 UrQMD pc 15.0 GeV/c

27 DPM 1.5 GeV/c

28 DPM 6.0 GeV/c

29 DPM 15.0 GeV/c

30 UrQMD pc 15.0 GeV/c