Development of a linac-based LEPD experimental station for surface structure analysis and coordination with synchrotron radiation ARPES

We report on the development of a low-energy positron diffraction (LEPD) experimental station for surface structure analysis using a linear electron accelerator (linac)-based slow-positron beam. LEPD is the positron counterpart of low-energy electron diffraction (LEED) and is expected to offer higher accuracy in surface structure determination compared to LEED. The station enables acquisition of LEPD I – V curves within a few hours. It consists of two ultra-high vacuum (UHV) chambers for LEPD measurements and sample preparation, equipped with essential tools for surface preparation and evaluation. A newly designed sample holder has been developed to be compatible with this LEPD station at SPF-A4 of the Slow Positron Facility (SPF) and the angle-resolved photoemission spectroscopy (ARPES) station at BL-13B of the Photon Factory (PF), both located at the Tsukuba campus of the Institute of Materials Structure Science (IMSS), High Energy Accelerator Research Organization (KEK). This system facilitates LEPD and ARPES measurements on the same sample under consistent surface conditions, achieved through identical preparation environments and procedures.

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Publication Details

Journal
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
Published
2025-02-04
DOI
https://doi.org/10.1016/j.nima.2025.170270
Primary Topic
Muon and positron interactions and applications
Type
article
Field-Weighted Citation Impact
0.00

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article

Development of a linac-based LEPD experimental station for surface structure analysis and coordination with synchrotron radiation ARPES

Izumi Mochizuki, Toshio Hyodo, Jozef Ociepa, O. Jagutzki et al.
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
Muon and positron interactions and applications
article

Development of a linac-based LEPD experimental station for surface structure analysis and coordination with synchrotron radiation ARPES

Izumi Mochizuki, Toshio Hyodo, Jozef Ociepa, O. Jagutzki, K. Ozawa, Tetsuroh Shirasawa, Kenta Amemiya, Miho Kitamura, A. Czasch, Ken Wada, Rezwan Ahmed, Seigi Mizuno, Yoshinari Kondo, Bartlomiej Checinski
article en

Abstract

We report on the development of a low-energy positron diffraction (LEPD) experimental station for surface structure analysis using a linear electron accelerator (linac)-based slow-positron beam. LEPD is the positron counterpart of low-energy electron diffraction (LEED) and is expected to offer higher accuracy in surface structure determination compared to LEED. The station enables acquisition of LEPD I – V curves within a few hours. It consists of two ultra-high vacuum (UHV) chambers for LEPD measurements and sample preparation, equipped with essential tools for surface preparation and evaluation. A newly designed sample holder has been developed to be compatible with this LEPD station at SPF-A4 of the Slow Positron Facility (SPF) and the angle-resolved photoemission spectroscopy (ARPES) station at BL-13B of the Photon Factory (PF), both located at the Tsukuba campus of the Institute of Materials Structure Science (IMSS), High Energy Accelerator Research Organization (KEK). This system facilitates LEPD and ARPES measurements on the same sample under consistent surface conditions, achieved through identical preparation environments and procedures.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated EquipmentVol. 1073
Goethe University Frankfurt (DE), High Energy Accelerator Research Organization (JP), National Institutes for Quantum Science and Technology (JP), Institut für Handelsforschung (DE), Max Planck Institute of Biophysics (DE), Applied Microengineering Limited (United Kingdom) (GB), National Institute of Advanced Industrial Science and Technology (JP)
Japan Society for the Promotion of Science
Openalex Percentile: Top 98%
Muon and positron interactions and applications
DOIOpen Access PDFOpenAlex
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