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Optimization of the strip angles of the LDC endcaps using the LiC Detector Toy

Optimization of the strip angles of the LDC endcaps using the LiC Detector Toy. The LiC Detector Toy Software. Simple, but flexible and powerful tool, written in MatLab Detector design studies Geometry, material budget Resolution, Inefficiencies Simulation

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Optimization of the strip angles of the LDC endcaps using the LiC Detector Toy

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  1. Optimization of the strip angles of the LDC endcapsusing the LiC Detector Toy

  2. The LiC Detector Toy Software • Simple, but flexible and powerful tool, written in MatLab • Detector design studies • Geometry, material budget • Resolution, Inefficiencies • Simulation • Solenoid magnetic field, helix track model • Multiple scattering, measurement errors and inefficiencies • Cylinders (barrel) or planes (forward/rear) • Strips and pads, uniform and gaussian errors (in TPC with diffusion corr.) • Reconstruction • Kalman filter • Fitted parameters and corresponding covariances at the beamtube • Output • Resolution of the reconstructed track parameters inside the beam tube • Impact parameters (projected and in space)

  3. The Detector Setup

  4. Standardized MC-Residuals

  5. Output: Residuals

  6. Output: Impacts

  7. Results (7.5° < θ < 8°, pt = 5-6GeV; 25-26GeV) +: Additional endcap Strip distance d=90μm Optimal case, see also next transparency

  8. Results (8.5° < θ < 9°, pt = 5-6GeV; 25-26GeV) : Radius FTD7 increased +: Add. endcap : Both : Both with inefficiency X: Original with ineff. Strip distance d=90μm

  9. Conclusions • Strip angle of 90° seems to be the best solution • The gap between the forward detectors and the TPC has to be reduced to a minimum • If necessary, the z position of the outermost detector has to be changed • Inefficiencies: • Resolutions stable with additional endcap • Without additional endcap seems to be stable, too, but a track loss of 10% occurs • Best solution: • Extend the outer radius of FTD7 as much as possible to fill the gap • Add an additional endcap FTD8

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