Open AccessA new UHV angle encoder for high‐resolution synchrotron radiation monochromators
Author(s) -
Senf F.,
Lammert H.,
Follath R.,
Zeschke T.,
Gudat W.,
Feichtinger K.,
Fischer P.,
Hübner W.,
Strobel R.
Publication year - 1998
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/s0909049597014696
Subject(s) - undulator , synchrotron radiation , optics , physics , rotation (mathematics) , encoder , resolution (logic) , synchrotron , rotary encoder , radiation , computer science , artificial intelligence , operating system
The high precision of 0.1 arcsec required for the positioning of optical elements in new two‐axes monochromators at the undulator beamlines at BESSY II has led to the development of UHV‐compatible high‐precision angle encoders. Mounted directly on the rotation axes, they provide substantial advantages over measuring systems connected outside the vacuum vessel. Making use of a fast closed‐loop control system, an accuracy of 0.1 arcsec at a resolution of less than 0.01 arcsec has been experimentally verified.