Difference between revisions of "FDC geometry study"
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| − | * The baseline geometry (GeomA) is Hall-D Geometry V4 | + | * The baseline geometry (GeomA) is Hall-D Geometry V4 but with CDC GeomC |
** Configuration of chambers: U (0 degrees), V (+60 degrees), W (-60 degrees) | ** Configuration of chambers: U (0 degrees), V (+60 degrees), W (-60 degrees) | ||
** No half-cell offset between neighboring wire planes. | ** No half-cell offset between neighboring wire planes. | ||
| Line 9: | Line 9: | ||
** The Lorentz effect was turned on, but no other smearing was applied | ** The Lorentz effect was turned on, but no other smearing was applied | ||
** The Riemann Fit was used to fit segments and determine the sign for the correction for the Lorentz effect | ** The Riemann Fit was used to fit segments and determine the sign for the correction for the Lorentz effect | ||
| − | ** Full track reconstruction with standard (ALT1) least squares fitter | + | ** Full track reconstruction with standard (ALT1) least squares fitter (time-based, but with uncorrected positions along the wires) |
| + | * Check for probability of correct LR assignment in segment fitting: require difference between reconstructed position along wire and true position | ||
| + | to be less than 80 microns. | ||
Revision as of 10:24, 17 November 2008
- The baseline geometry (GeomA) is Hall-D Geometry V4 but with CDC GeomC
- Configuration of chambers: U (0 degrees), V (+60 degrees), W (-60 degrees)
- No half-cell offset between neighboring wire planes.
- Alternate geometry GeomB
- Configuration of chambers: UU' (0 degrees), VV'(-60 degrees), WW'(+60 degrees)
- Half-cell offset between primed and unprimed chambers
- In both cases I studied 3 cm separation between wire planes (nominal geometry) and 2 cm separation.
- Single pion tracks (p=0.5,1.0,1.5,2.5 GeV/c) generated from the center of the target and analyzed with the standard reconstruction
- The Lorentz effect was turned on, but no other smearing was applied
- The Riemann Fit was used to fit segments and determine the sign for the correction for the Lorentz effect
- Full track reconstruction with standard (ALT1) least squares fitter (time-based, but with uncorrected positions along the wires)
- Check for probability of correct LR assignment in segment fitting: require difference between reconstructed position along wire and true position
to be less than 80 microns.
