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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2501.00188 |
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| _version_ | 1866916549506367488 |
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| author | Ahmed, Rezwan Mochizuki, Izumi Hyodo, Toshio Shirasawa, Tetsuroh Mizuno, Seigi Kondo, Yoshinari Ozawa, Kenichi Kitamura, Miho Amemiya, Kenta Checinski, Bartlomiej Ociepa, Jozef Czasch, Achim Jagutzki, Ottmar Wada, Ken |
| author_facet | Ahmed, Rezwan Mochizuki, Izumi Hyodo, Toshio Shirasawa, Tetsuroh Mizuno, Seigi Kondo, Yoshinari Ozawa, Kenichi Kitamura, Miho Amemiya, Kenta Checinski, Bartlomiej Ociepa, Jozef Czasch, Achim Jagutzki, Ottmar Wada, Ken |
| contents | We report on the development of a low-energy positron diffraction (LEPD) experimental station for surface structure analysis using a linac-based slow-positron beam. LEPD, the positron counterpart of low-energy electron diffraction (LEED), offers higher accuracy in surface structure determination. The station enables acquisition of LEPD I-V curves within a few hours, allowing measurements before surface degradation occurs. It consists of two ultra-high vacuum (UHV) chambers: one for sample preparation and the other for LEPD observations. The preparation chamber includes an Ar+ sputtering system, a triple-pocket electron beam evaporator, three gas introduction systems, additional user-configurable ports, and a LEED/Auger electron spectroscopy (AES) system. Sample manipulators enable rapid cooling, precise positioning, and orientation adjustments. In the preparation chamber, the manipulator also supports direct current heating up to 1200 °C. The sample holder is compatible with the LEPD station at SPF-A4 and the ARPES station at PF BL-13B, both located at the Tsukuba campus of the Institute of Materials Structure Science (IMSS), KEK. Design concepts and experimental demonstrations are presented. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_00188 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Development of a linac-based LEPD experimental station for surface structure analysis and coordination with synchrotron radiation ARPES Ahmed, Rezwan Mochizuki, Izumi Hyodo, Toshio Shirasawa, Tetsuroh Mizuno, Seigi Kondo, Yoshinari Ozawa, Kenichi Kitamura, Miho Amemiya, Kenta Checinski, Bartlomiej Ociepa, Jozef Czasch, Achim Jagutzki, Ottmar Wada, Ken Instrumentation and Detectors Materials Science Accelerator Physics We report on the development of a low-energy positron diffraction (LEPD) experimental station for surface structure analysis using a linac-based slow-positron beam. LEPD, the positron counterpart of low-energy electron diffraction (LEED), offers higher accuracy in surface structure determination. The station enables acquisition of LEPD I-V curves within a few hours, allowing measurements before surface degradation occurs. It consists of two ultra-high vacuum (UHV) chambers: one for sample preparation and the other for LEPD observations. The preparation chamber includes an Ar+ sputtering system, a triple-pocket electron beam evaporator, three gas introduction systems, additional user-configurable ports, and a LEED/Auger electron spectroscopy (AES) system. Sample manipulators enable rapid cooling, precise positioning, and orientation adjustments. In the preparation chamber, the manipulator also supports direct current heating up to 1200 °C. The sample holder is compatible with the LEPD station at SPF-A4 and the ARPES station at PF BL-13B, both located at the Tsukuba campus of the Institute of Materials Structure Science (IMSS), KEK. Design concepts and experimental demonstrations are presented. |
| title | Development of a linac-based LEPD experimental station for surface structure analysis and coordination with synchrotron radiation ARPES |
| topic | Instrumentation and Detectors Materials Science Accelerator Physics |
| url | https://arxiv.org/abs/2501.00188 |