Geometry optimization of a barrel silicon pixelated tracker

Qing-Yuan Liu; Meng Wang; Marc Winter

doi:10.1088/1674-1137/41/8/086001

Chinese Physics C> 2017, Vol. 41> Issue(8) : 086001 DOI: 10.1088/1674-1137/41/8/086001

Geometry optimization of a barrel silicon pixelated tracker

1.
School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE), Shandong University, Jinan 250100, China
2.
Université
3.
School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE), Shandong University, Jinan 250100, China
4.
Université

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Abstract：
We have studied optimization of the design of a barrel-shaped pixelated tracker for given spatial boundaries. The optimization includes choice of number of layers and layer spacing. Focusing on tracking performance only, momentum resolution is chosen as the figure of merit. The layer spacing is studied based on Gluckstern's method and a numerical geometry scan of all possible tracker layouts. A formula to give the optimal geometry for curvature measurement is derived in the case of negligible multiple scattering to deal with trajectories of very high momentum particles. The result is validated by a numerical scan method, which could also be implemented with any track fitting algorithm involving material effects, to search for the optimal layer spacing and to determine the total number of layers for the momentum range of interest under the same magnetic field. The geometry optimization of an inner silicon pixel tracker proposed for BESⅢ is also studied by using a numerical scan and these results are compared with Geant4-based simulations.
- tracker geometry optimization ,
- optimal spacing ,
- numerical scan ,
- least squares ,
- kalman filter initialization ,
- BESIII silicon pixel tracker

References

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Qing-Yuan Liu, Meng Wang and Marc Winter. Geometry optimization of a barrel silicon pixelated tracker[J]. Chinese Physics C, 2017, 41(8): 086001. doi: 10.1088/1674-1137/41/8/086001

Qing-Yuan Liu, Meng Wang and Marc Winter. Geometry optimization of a barrel silicon pixelated tracker[J]. Chinese Physics C, 2017, 41(8): 086001. doi: 10.1088/1674-1137/41/8/086001 shu

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Received: 2017-02-14

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Supported by National Natural Science Foundation of China (U1232202)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Geometry optimization of a barrel silicon pixelated tracker

Corresponding author: Meng Wang,

1. School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE), Shandong University, Jinan 250100, China

2. Université

3. School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE), Shandong University, Jinan 250100, China

4. Université

Received Date: 2017-02-14

Available Online: 2017-08-05

Fund Project: Supported by National Natural Science Foundation of China (U1232202)

Abstract: We have studied optimization of the design of a barrel-shaped pixelated tracker for given spatial boundaries. The optimization includes choice of number of layers and layer spacing. Focusing on tracking performance only, momentum resolution is chosen as the figure of merit. The layer spacing is studied based on Gluckstern's method and a numerical geometry scan of all possible tracker layouts. A formula to give the optimal geometry for curvature measurement is derived in the case of negligible multiple scattering to deal with trajectories of very high momentum particles. The result is validated by a numerical scan method, which could also be implemented with any track fitting algorithm involving material effects, to search for the optimal layer spacing and to determine the total number of layers for the momentum range of interest under the same magnetic field. The geometry optimization of an inner silicon pixel tracker proposed for BESⅢ is also studied by using a numerical scan and these results are compared with Geant4-based simulations.

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