Stable sub‐micrometre high‐flux probe for soft X‐ray ARPES using a monolithic Wolter mirror. (10th July 2020)

• Record Type: Journal Article
• Authors: Senba, Yasunori; Kishimoto, Hikaru; Takeo, Yoko; Yumoto, Hirokatsu; Koyama, Takahisa; Mimura, Hidekazu; Ohashi, Haruhiko
• Is Part Of: Journal of synchrotron radiation. Volume 27:Part 5(2020)
• Page Start: 1103
• Page End: 1107
• Publication Date: 2020-07-10
• Subjects: focusing optics -- Wolter mirror -- monolithic -- soft X‐rays -- ARPES; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577520007274
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : A monolithic Wolter‐type mirror with large acceptance, achromatism and small comatic aberration was designed and evaluated at the soft X‐ray beamline BL25SU of SPring‐8. Abstract : A focusing optics that can provide a sub‐micrometre high‐flux probe for soft X‐ray micrometre‐scale angle‐resolved photoemission spectroscopy (ARPES) is proposed. A monolithic Wolter‐type mirror with a large acceptance, achromatism and small comatic aberration was designed and evaluated. A focused beam size of 0.4 µm (vertical) × 4 µm (horizontal), a high throughput of 59% and a high tolerance of 1.6 mrad to the pitching error were realized at a photon energy of 1000 eV. A Wolter‐type mirror can be practically employed as a stable sub‐micrometre focusing mirror with high throughput in ARPES applications.