Open AccessAP‐XPS beamline, a platform for operando science at Pohang Accelerator Laboratory
Author(s) -
Kim Geonhwa,
Yu Youngseok,
Lim Hojoon,
Jeong Beomgyun,
Lee Jouhahn,
Baik Jaeyoon,
Mun Bongjin Simon,
Kim Ki-jeong
Publication year - 2020
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s160057751901676x
Subject(s) - beamline , x ray photoelectron spectroscopy , synchrotron , accelerator mass spectrometry , physics , optics , mass spectrometry , beam (structure) , nuclear magnetic resonance , quantum mechanics
Beamline 8A (BL 8A) is an undulator‐based soft X‐ray beamline at Pohang Accelerator Laboratory. This beamline is aimed at high‐resolution ambient‐pressure X‐ray photoelectron spectroscopy (AP‐XPS), soft X‐ray absorption spectroscopy (soft‐XAS) and scanning photoemission microscopy (SPEM) experiments. BL 8A has two branches, 8A1 SPEM and 8A2 AP‐XPS, that share a plane undulator, the first mirror (M1) and the monochromator. The photon beam is switched between the two branches by changing the refocusing mirrors after the monochromator. The acceptance angle of M1 is kept glancing at 1.2°, and Pt is coated onto the mirrors to achieve high reflectance, which ensures a wide photon energy range (100–2000 eV) with high resolution at a photon flux of ∼10 13 photons s −1 . In this article, the main properties and performance of the beamline are reported, together with selected experiments performed on the new beamline and experimental system.