The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF
AU - Yuan, Y.S.
AU - Boine-Frankenheim, O.
AU - Franchetti, G.
AU - Hofmann, I.
ED - Koscielniak, Shane
ED - Satogata, Todd
ED - Schaa, Volker RW
ED - Thomson, Jana
TI - Space Charge Limitations for Bunch Compression in Synchrotrons
J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018
C1 - Vancouver, BC, Canada
T2 - International Particle Accelerator Conference
T3 - 9
LA - english
AB - Bunch compression achieved via a fast bunch rotation in longitudinal phase space is a well-accepted scheme to generate short, intense ion bunches for various applications. During bunch compression, coherent beam instabilities and incoherent single particle resonances can occur because of increasing space charge, resulting in an important limitation for the bunch intensity. We present an analysis of the relevant space charge driven beam instability and resonance phenomena during bunch compression. A coupled longitudinal-transverse envelope approach is compared with Particle-In-Cell (PIC) simulations. Two distinct cases of crossing are discussed and applied to the GSI SIS18 heavy-ion synchrotron. It is shown that during bunch compression, the 90^{°} condition of phase advance is associated with a fourth order single particle resonance and the 120^{°} condition with the recently discovered dispersion-induced instability. The agreement between the envelope and PIC results indicates that the stop band is defined by the 120^{°} dispersion instability, which should be avoided during bunch compression.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 3518
EP - 3521
KW - space-charge
KW - resonance
KW - simulation
KW - emittance
KW - synchrotron
DA - 2018/06
PY - 2018
SN - 978-3-95450-184-7
DO - 10.18429/JACoW-IPAC2018-THPAK117
UR - http://jacow.org/ipac2018/papers/thpak117.pdf
ER -