Source size and emittance monitoring on BESSY II

Three optical monitors image the transverse cross section of the electron beam at BESSY II. The emittance of the electron beam can be determined from source images generated by hard X-ray pinhole cameras without additional measurement of the energy width of the beam. Vertical emittance changes down...

Full description

Saved in:
Bibliographic Details
Published inNuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 467; pp. 235 - 238
Main Authors Holldack, K., Feikes, J., Peatman, W.B.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 21.07.2001
Subjects
Bragg-Fresnel optics
Emittance monitors
Pinhole arrays
Storage ring
Undulator radiation
Undulator radiation
Pinhole arrays
Storage ring
Emittance monitors
29.20.Dh
Bragg-Fresnel optics
Online AccessGet full text

Cover

More Information
Summary:Three optical monitors image the transverse cross section of the electron beam at BESSY II. The emittance of the electron beam can be determined from source images generated by hard X-ray pinhole cameras without additional measurement of the energy width of the beam. Vertical emittance changes down to 3 pmrad can be detected. Typical emittance values of 5<ε x <6 nmrad horizontal and of ε y< 1 0 0 pmrad vertical are provided in user runs with up to 300 mA ring current. These results agree with higher resolution measurements of the Bragg–Fresnel telescope. Measurements of the source size versus ring current as well as the influence of feedbacks and the relation between emittance coupling and the properties of undulator radiation are given.
ISSN:0168-9002
1872-9576
DOI:10.1016/S0168-9002(01)00555-1