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Re: B field scaling for PANDA [message #7882 is a reply to message #7805] Mon, 16 February 2009 14:05 Go to previous messageGo to previous message
Mohammad Al-Turany is currently offline  Mohammad Al-Turany
Messages: 518
Registered: April 2004
Location: GSI, Germany
first-grade participant
From: *gsi.de
Hi,

It is now implemented and available in SVN, Jost has generated the maps for different beam energies, namely:

15.0 GeV/C
11.91 GeV/C
8.90 GeV/C
4.06 GeV/C
1.5 GeV/C

the corresponding maps are:

The dipole itself:
DipoleMap1.1500.root
DipoleMap1.1191.root
DipoleMap1.0890.root
DipoleMap1.0406.root
DipoleMap1.0150.root

in front of the dipole:
DipoleMap2.1500.root
DipoleMap2.1191.root
DipoleMap2.0890.root
DipoleMap2.0406.root
DipoleMap2.0150.root

and the region between dipole and Solenoid:

TransMap.1500.root
TransMap.1191.root
TransMap.0890.root
TransMap.0406.root
TransMap.0150.root

The beam energy can be set in sim macro with:

FairRunSim::SetBeamEnergy(Double_t Energy /** GeV/c */ )

according to the energy the field is selected, for now the selection is as following:

BeamEnergy < 2.0 Map 0150
BeamEnergy < 5.0 Map 0406
BeamEnergy < 10.0 Map 0890;
BeamEnergy < 12.0 Map 1190
otherwise Map 1500;


An example for using this can be found in macro/run/run_sim.C and macro/emc/sim_emc.C

setting this in a simulation session, the RuntimDB will take care that the reconstruction get the proper fields!

regards

Mohammad
















[Updated on: Mon, 16 February 2009 14:21]

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