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TY - CONF
AU - Kuroo, N.
AU - Hirosawa, K.
AU - Ohmi, K.
AU - Oide, K.
AU - Zhou, D.
AU - Zimmermann, F.
ED - Koscielniak, Shane
ED - Satogata, Todd
ED - Schaa, Volker RW
ED - Thomson, Jana
TI - Mode Coupling Theory in Collisions With a Large Crossing Angle
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 - We discuss a novel coherent beam-beam instability in collisions with a large crossing angle. The instability appears in the correlated head-tail motion of the two colliding beams. Cross wake force is introduced to represent the head-tail correlation between colliding beams. The cross wake force is localized at the collision point. Mode coupling theory based on the cross wake force is developed. Collision scheme with a large crossing angle is being very popular in design of electron positron collider. In SuperKEKB project, a collision with a large crossing angle is performed to boost the luminosity ~ 10³⁶ cm⁻²s^{−1}. Future circular collider, FCC is also designed with a large crossing angle. Strong-strong simulations have shown a strong coherent head-tail instability, which can limit the performance of proposed future colliders. The mode coupling theory using the cross wake force explains the instability. The instability may affect all colliders designs based on the crab waist scheme.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 3197
EP - 3199
KW - coupling
KW - dipole
KW - synchrotron
KW - collider
KW - positron
DA - 2018/06
PY - 2018
SN - 978-3-95450-184-7
DO - 10.18429/JACoW-IPAC2018-THPAF089
UR - http://jacow.org/ipac2018/papers/thpaf089.pdf
ER -