Title :
Initial CTR-based bunch length measurements of linac beams following the APS bunch compressor
Author :
Lumpkin, A.H. ; Berg, W.J. ; Borland, M. ; Lewellen, J.W. ; Sereno, N.S.
Author_Institution :
Adv. Photon Source, Argonne Nat. Lab., IL, USA
Abstract :
The interest in generation and characterization of ultrabright electron beams for experiments at the Advanced Photon Source (APS) resulted in the installation of a four-dipole chicane bunch compressor within the linac. Both RF thermionic guns and an RF photocathode (PC) gun can be used to generate the electron beams with ps-regime bunch lengths. The bunch compressor can then be used to produce subps bunches. In support of this initiative, a coherent transition radiation (CTR) bunch length monitor based on a far-infrared (FIR) Michelson interferometer was also installed at a location just downstream of the compressor. It used a room-temperature Golay cell as the FIR detector. Processing of the autocorrelation data indicated that structures shorter than 500 fs were being generated.
Keywords :
accelerator RF systems; electron accelerators; linear accelerators; particle beam bunching; particle beam diagnostics; storage rings; 293 to 298 K; APS; Advanced Photon Source; FIR detector; RF photocathode gun; RF thermionic gun; autocorrelation data; coherent transition radiation bunch length monitor; far-infrared Michelson interferometer; four-dipole chicane bunch compressor; linac beams; ps-regime bunch length; room-temperature Golay cell; subps bunch production; ultrabright electron beam generation; Cathodes; Character generation; Detectors; Electron beams; Electron guns; Finite impulse response filter; Length measurement; Linear particle accelerator; Radiation monitoring; Radio frequency;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1289140
