CERN Accelerating science

Article
Title	Production of Short Electron Bunches by Slow and Fast Excitations of Longitudinal Bunch-Shape Oscillations
Author(s)	Sakanaka, Shogo ; Mitsuhashi, Toshiyuki ; Obina, Takashi ; Umemori, Kensei
Affiliation	(KEK, Ibaraki)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2887
Subject category	Accelerators and Storage Rings
Abstract	In the Brookhaven Alternating Gradient Synchrotron (AGS), adiabatic excitation of longitudinal bunch-shape oscillations has been successfully used for extracting shortened proton bunches.* We applied this technique to the electron storage ring. In case of electron machines, growth time of bunch-shape oscillations should be shorter than the radiation damping time for preventing radiation excitation. We demonstrated in the 2.5-GeV Photon Factory storage ring that electron bunches could be shortened by a factor of about two from its natural length using this technique. We show that non-adiabatic excitation of oscillations is also very useful for obtaining shorter bunches.