Positron Channeling in Quasi-Mosaic Bent Crystals: Atomistic Simulations vs. Experiment
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909385571172352 |
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| author | Marquez-Mijares, Maykel Rojas-Lorenzo, German Ibanez-Almaguer, Paulo E. Robayo-Soneira, Jesus Solov'yov, Andrey V. |
| author_facet | Marquez-Mijares, Maykel Rojas-Lorenzo, German Ibanez-Almaguer, Paulo E. Robayo-Soneira, Jesus Solov'yov, Andrey V. |
| contents | This paper reports on a comprehensive study of an ultra-relativistic positron beam deflection by an oriented quasi-mosaic crystal. The analysis was carried out for the positron energy of 530 MeV incident on the quasi-mosaic bent Si(111) crystal. This particular case was chosen because it has recently been studied experimentally at the Mainz Microtron MAMI. The results of the relativistic molecular dynamics simulations were compared with the experimental observations and a good agreement was found. The presence of planar channeling, de-channeling, volume reflection and volume capture processes in the angular distribution of deflected positrons for different beam-crystal alignments has been studied. Predictions have been made for certain crystal orientations for which experimental data are lacking. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_07100 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Positron Channeling in Quasi-Mosaic Bent Crystals: Atomistic Simulations vs. Experiment Marquez-Mijares, Maykel Rojas-Lorenzo, German Ibanez-Almaguer, Paulo E. Robayo-Soneira, Jesus Solov'yov, Andrey V. Atomic Physics Accelerator Physics This paper reports on a comprehensive study of an ultra-relativistic positron beam deflection by an oriented quasi-mosaic crystal. The analysis was carried out for the positron energy of 530 MeV incident on the quasi-mosaic bent Si(111) crystal. This particular case was chosen because it has recently been studied experimentally at the Mainz Microtron MAMI. The results of the relativistic molecular dynamics simulations were compared with the experimental observations and a good agreement was found. The presence of planar channeling, de-channeling, volume reflection and volume capture processes in the angular distribution of deflected positrons for different beam-crystal alignments has been studied. Predictions have been made for certain crystal orientations for which experimental data are lacking. |
| title | Positron Channeling in Quasi-Mosaic Bent Crystals: Atomistic Simulations vs. Experiment |
| topic | Atomic Physics Accelerator Physics |
| url | https://arxiv.org/abs/2411.07100 |