Fast switching source for polarization modulation spectroscopy

Authors
Rowen, M Luning, J
Citation
M. Rowen et J. Luning, Fast switching source for polarization modulation spectroscopy, NUCL INST A, 467, 2001, pp. 169-172
Citations number
6
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
467
Year of publication
2001
Part
1
Pages
169 - 172
Database
ISI
SICI code
0168-9002(20010721)467:<169:FSSFPM>2.0.ZU;2-A
Abstract
A method for rapidly switching the polarization of soft X-rays from an inse rtion device on a synchrotron with minimal perturbation of the magnetic fie ld is proposed. It is based on sequentially shifting the harmonics from two undulators into and out of the band pass of a monochromator. The chromatic shifting of the harmonics requires only small change of the magnetic field . This small perturbation of the magnetic fields should permit higher modul ation frequencies and improved signal-to-noise ratios for polarization modu lation spectroscopy. (C) 2001 Elsevier Science B.V. All rights reserved.