Angular momentum measurement of the FNPL electron beam

Author

Sun, Y. ; Kim, K.-J. ; Piot, P. ; Desler, K. ; Edwards, D. ; Edwards, H. ; Huening, M. ; Santucci, J. ; Barov, N. ; Mihalcea, D. ; Tikhoplav, R. ; Lidia, S. ; Wang, S.-H.

Author_Institution

Chicago Univ., IL, USA

Volume

4

fYear

2003

fDate

12-16 May 2003

Firstpage

2682

Abstract

In the flat beam experiment at Fermilab/NICADD Photoinjector Laboratory(FNPL), it is essential to have a nonvanishing longitudinal magnetic field on the photocathode. The canonical angular momentum of the electron beam generated by this magnetic field is an important parameter in understanding the round to flat beam transformation. In this paper, we report our measurements of the canonical angular momentum, which is directly related to the skew diagonal elements of the beam matrix before beam is made flat. The measurements of the other elements of the beam matrix are also reported.

Keywords

angular momentum; electron accelerators; magnetic fields; particle beam diagnostics; particle beam injection; photocathodes; FNPL electron beam; Fermilab/NICADD Photoinjector Laboratory; angular momentum measurement; beam matrix; canonical angular momentum; flat beam experiment; nonvanishing longitudinal magnetic field; photocathode; skew diagonal elements; Acceleration; Cathodes; Electron beams; Linear particle accelerator; Magnetic field measurement; Magnetic fields; Particle beams; Solenoids; Space charge; Sun;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289229

Filename

1289229