Material effects and detector response corrections for bunch length measurements

Author

Zacherl, W. ; Blumenfeld, I. ; Hogan, M.J. ; Ischebeck, R. ; Clayton, C. ; Muggli, P. ; Zhou, M.

Author_Institution

SLAC, Menlo Park

fYear

2007

fDate

25-29 June 2007

Firstpage

4147

Lastpage

4149

Abstract

A typical diagnostic used to determine the bunch length of ultra-short electron bunches is the auto-correlation of coherent transition radiation. This technique can produce artificially short bunch length results due to the attenuation of low frequency radiation if corrections for the material properties of the Michelson interferometer and detector response are not made. Measurements were taken using FTIR spectroscopy to determine the absorption spectrum of various materials and the response of a Molectron PI-45 pyroelectric detector. The material absorption data will be presented and limitations on the detector calibration discussed.

Keywords

Fourier transform spectroscopy; electron beams; particle beam bunching; particle beam diagnostics; transition radiation; FTIR spectroscopy; Michelson interferometer; absorption spectrum; bunch length measurements; coherent transition radiation; detector response corrections; material absorption data; ultrashort electron bunches; Absorption; Attenuation; Autocorrelation; Electrons; Frequency; Length measurement; Material properties; Pyroelectricity; Radiation detectors; Spectroscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4440069

Filename

4440069