Geant4 simulation for the responses to X-rays and charged particles through the eXTP focusing mirrors

Qi LQ, Li G, Xu YP, Zhang J, Yang YJ, Sheng LZ, Basso S, Campana R, Chen Y, De Rosa A, Pareschi G, Qiang PF, Santangelo A, Sironi G, Song LM, Spiga D, Tagliaferri G, Wang J, Wilms J, Zhang Y, Lu FJ (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Elsevier

Book Volume: 963

Article Number: 163702

DOI: 10.1016/j.nima.2020.163702

Abstract

A geometrical and physical model of Wolter-I type mirrors has been implemented in Geant4 for the design of the enhanced X-ray Timing and Polarimetry observatory (eXTP). It can simultaneously simulate the mirror responses to X-rays and charged particles. A new geometry class G4Hyperboloid is created and verified, which allows an exact surface profile description of Wolter-I optics. A physics model for the interaction of X-rays and matter is implemented to effectively estimate the focusing performances with reasonable accuracy, including the effective area and the point spread function. Scattering models of charged particles at grazing incidence are discussed. The multiple scattering model provided by the latest Geant4 release can be used instead of the single scattering model with reasonable accuracy and CPU cost when the step size is properly constrained.

Authors with CRIS profile

Jörn Wilms Professur für Astronomie und Astrophysik

Involved external institutions

Institute of High Energy Physics (IHEP) / 中国科学院高能物理研究所 CN China (CN) Xian Institute of Optics and Precision Mechanics (XIOPM) CN China (CN) Brera Observatory / Osservatorio Astronomico di Brera IT Italy (IT) National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF) IT Italy (IT) Eberhard Karls Universität Tübingen DE Germany (DE)

How to cite

APA:

Qi, L.Q., Li, G., Xu, Y.P., Zhang, J., Yang, Y.J., Sheng, L.Z.,... Lu, F.J. (2020). Geant4 simulation for the responses to X-rays and charged particles through the eXTP focusing mirrors. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 963. https://doi.org/10.1016/j.nima.2020.163702

MLA:

Qi, L. Q., et al. "Geant4 simulation for the responses to X-rays and charged particles through the eXTP focusing mirrors." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 963 (2020).

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