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Quasi traveling wave side couple RF gun for superkekb

Takuya Natsui, Mitsuhiro Yoshida, Xiangyu Zhou, Yujiro Ogawa

Abstract

We are developing a new RF gun for SuperKEKB. High charge low emittance electron and positron beams are required for SuperKEKB. We will generate 7.0 GeV electron beam at 5 nC 20 mm-mrad by J-linac. In this linac, a photo cathode S-band RF gun will be used as the electron beam source. For this reason, we are developing an advanced RF gun. We have tested a Disk and Washer (DAW) type RF gun. Additionally, another new RF gun which has two side coupled standing wave field is developed. We call it quasi traveling wave side couple RF gun. This gun has a strong focusing field at the cathode and the acceleration field distribution also has a focusing effect.

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Available abstract

Key concepts: Electron gun, Physics, Linear particle accelerator, Thermal emittance, Beam (structure), Optics, Acceleration, Cathode