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Author Besnier, G. ♦ Laclare, J. L. ♦ Limborg, C.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PARTICLE ACCELERATORS ♦ ELECTRON BEAMS ♦ BEAM BUNCHING ♦ STORAGE RINGS ♦ TURBULENCE ♦ INSTABILITY ♦ SYNCHROTRON RADIATION ♦ BEAM PROFILES ♦ POTENTIAL BARRIER
Abstract The ESRF storage ring lattice has demonstrated a high degree of flexibility{sup 1} allowing to vary the momentum compaction {alpha}{sub 1} in a large range from {minus}5 10{sup {minus}4} to 3 10{sup {minus}3}. This makes our storage ring an ideal bench to test the possible achievement of short and intense bunches. For time of flight experiments, we are obviously interested in the minimum bunch length as well as in the resulting energy spread which has to remain small enough to avoid spoiling the brilliance of the synchrotron radiation at the peak of an undulator harmonic. We are certainly lacking data concerning the details of this machine impedance in a large frequency range of concern for short bunches. In addition, for many years now, we have also been dramatically lacking in correct theoretical support to the so-called microwave instability. We keep applying the approximate stability criterion of Boussard{sup 2} or the scaling law of Chao-Gareyte{sup 3} without a solid definition of the key quantity ({ital Z}{sub {parallel}}/{ital p}){sub eff} to be used. In fact, in many respects, our understanding of bunched beams is significantly less developed than that of coasting beams. In the following we try to propose a few reflections on the subject when a purely inductive interaction is assumed. {copyright} {ital 1996 American Institute of Physics.}
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-04-01
Publisher Place United States
Volume Number 367
Issue Number 1
Technical Publication No. CONF-9509227-


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