Beam-size-free optics determination

A new method to measure the Twiss parameters in a beam transport line is presented. Usually these parameters are obtained based on the measured beam sizes. In the new method, in contrast, we determine them by finding quadrupole strengths that result in minimum beam sizes at a downstream measurement...

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Bibliographic Details
Published inNuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 753; pp. 24 - 33
Main Authors Aiba, Masamitsu, Beutner, Bolko, Milas, Natalia
Format Journal Article
LanguageEnglish
Published Elsevier B.V 21.07.2014
Subjects
Accelerators
Beam transport line
Beams (radiation)
Injectors
Monitors
Quadrupoles
Systematic errors
Test facilities
Twiss parameter measurement
Beam transport line
Twiss parameter measurement
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Summary:A new method to measure the Twiss parameters in a beam transport line is presented. Usually these parameters are obtained based on the measured beam sizes. In the new method, in contrast, we determine them by finding quadrupole strengths that result in minimum beam sizes at a downstream measurement location. Therefore, systematic errors related to beam-size monitors do not propagate to the measured Twiss parameters. We describe the method together with a detailed estimation of statistical and systematic errors. It was examined with beam at the SwissFEL injector test facility at PSI, and these results are also presented.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2014.03.031