Suppression of beam-break-up in a standing wave free electron laser two-beam accelerator

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:51864

Li, H; Kim, J S ^[1]

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1. Lawrence Berkeley Lab., CA (United States)

The standing-wave free-electron laser two-beam accelerator (SWFEL/TBA) has been proposed as a candidate for the next generation linear collider and many studies on its feasibility have been carried out. In this device a high-energy , low-current electron or positron beam is expected to be accelerated to a very high energy, {approximately}TeV by microwave power generated from a sequence of many SWFEL cavities driven by a second beam of high current, low energy. Previous studies have revealed many merits of this version of a high gradient linear collider, but they also indicated a potential difficulty in designing its long drive-beam device, which is the so called beam break-up (BBU) problem. Various schemes are examined in this study on the suppression of BBU in a SWFEL/TBA. Two schemes are found to be not only able to effectively suppress the BBU but at the same time have minimum effect on the microwave generation process inside the SWFEL cavities. One is making the cavity-iris junction sufficiently gradual and the other is stagger-tuning the cavities.

• DOE Contract Number: W-7405-ENG-48; AC03-76SF00098
• OSTI ID: 51864
• Report Number(s): CONF-940142--; ISBN 0-8194-1449-2
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM DYNAMICS
CAVITY RESONATORS
DAMPING
DESIGN
LINEAR COLLIDERS
MATHEMATICAL MODELS
POWER SUPPLIES
RF SYSTEMS