Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1289229
