Resolution of Transverse Electron Beam Measurements Using Optical Transition Radiation

Author

Ischebeck, Rasmus ; Decker, Franz-Josef ; Hogan, Mark ; Iverson, Richard H. ; Krejcik, Patrick ; Siemann, Robert H. ; Walz, Dieter ; Lincoln, Melissa ; Clayton, Chris E. ; Huang, Chengkun ; Lu, Wei ; Deng, Suzhi ; Oz, Erdem

Author_Institution

Stanford Linear Accelerator Center

fYear

2005

fDate

16-20 May 2005

Firstpage

4042

Lastpage

4044

Abstract

In the plasma wakefield acceleration experiment E-167, optical transition radiation is used to measure the transverse profile of the electron bunches before and after the plasma acceleration. The distribution of the electric field from a single electron does not give a point-like distribution on the detector, but has a certain extension. Additionally, the resolution of the imaging system is affected by aberrations. The transverse profile of the bunch is thus convolved with a point spread function (PSF). Algorithms that deconvolve the image can help to improve the resolution. Imaged test patterns are used to determine the modulation transfer function of the lens. From this, the PSF can be reconstructed. The Lucy-Richardson algorithm is used to deconvolute this PSF from test images.

Keywords

Detectors; Electron beams; Electron optics; Image resolution; Optical beams; Optical imaging; Plasma accelerators; Plasma measurements; Testing; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the

Print_ISBN

0-7803-8859-3

Type

conf

DOI

10.1109/PAC.2005.1591710

Filename

1591710