Open AccessSmall‐gap insertion‐device development at the National Synchrotron Light Source – performance of the new X13 mini‐gap undulator
Author(s) -
Ablett J. M.,
Berman L. E.,
Kao C. C.,
Rakowsky G.,
Lynch D.
Publication year - 2004
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/s0909049503022921
Subject(s) - undulator , synchrotron light source , physics , synchrotron , advanced photon source , synchrotron radiation , storage ring , particle accelerator , optics , cathode ray , brightness , electron , beam (structure) , nuclear physics
The National Synchrotron Light Source (NSLS) 2.8 GeV electron storage ring continues to set high standards in insertion‐device research and development. The Chasman–Green NSLS lattice design provides for dispersion‐free long straight sections in addition to a very small vertical β function. As the electron beam size is proportional to the square root of this function, a program to exploit this feature was undertaken more than a decade ago by implementing short‐period small‐gap insertion devices in the NSLS storage ring. The possibility of utilizing existing moderate‐energy synchrotron radiation electron storage rings to produce high‐brightness photon beams into the harder X‐ray region have been realised using in‐vacuum undulators. In this article the operation of a 1.25 cm‐period mini‐gap undulator, operating down to a gap of 3.3 mm within the NSLS X13 straight section, is reported. It is the brightest source of hard X‐rays in the energy range ∼3.7–16 keV at the NSLS, and replaces an in‐vacuum undulator which had a more limited tunability.