CERN Accelerating science

Article
Title	Lattice Upgrade Plan for Crab Crossing at the KEKB Rings
Author(s)	Morita, Akio ; Egawa, Kazumi ; Hosoyama, K ; Koiso, Haruyo ; Kubo, T ; Masuzawa, Mika ; Ohmi, Kazuhito ; Oide, Katsunobu ; Sugahara, Ryuhei ; Yoshida, Masato
Affiliation	(KEK, Ibaraki)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.865
Subject category	Accelerators and Storage Rings
Abstract	We plan to install two superconducting crab cavities into the rings at Janyary, 2006. In our plan, we will install one crab cavity per one ring into the NIKKO straight section where the cryogenic infrastructure is already operated for the superconducting accelerating cavities. In order to obtain the correct crabbing angle at the interaction point(IP), we have to enlarge the horizontal beta function(200m for HER) and have to adjust the horizontal phase advance between the IP and the cavity installation point. In this paper, we will report the lattice modified for the crab crossing and the study results about the single beam dynamics.