Open AccessPractical design and performance of a new merged APPLE‐Knot undulator
Author(s) -
Zhang Fayuan,
Sun Zhipeng,
Qiao Yuxi,
Qiao Shan
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/s1600577520011753
Subject(s) - undulator , synchrotron radiation , knot (papermaking) , magnet , storage ring , physics , optics , computer science , materials science , radiation , beam (structure) , quantum mechanics , composite material
Constructing vacuum‐ultraviolet beamlines at synchrotron radiation facilities with giga‐electron volt storage ring results in serious heat load on the beamlines which can reduce their performance. To solve this problem, an APPLE‐Knot undulator with eight magnet rows has been built at the Shanghai Synchrotron Radiation Facility and has achieved very good performance. However, its performance in vertical polarization mode is imperfect. Here, a new configuration of a magnet‐merged APPLE‐Knot undulator that has achieved a better performance is reported.