Transverse instabilities in a relativistic klystron two-beam accelerator

Conference · Sat Aug 01 04:00:00 EDT 1992

OSTI ID:10131408

Westenskow, G A; Houck, T L ^[1]; Yu, S S ^[2]

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1. Lawrence Livermore National Lab., CA (United States)
2. Lawrence Berkeley Lab., CA (United States)

Transverse beam instabilities have been observed in the traveling-wave output structures of high-power microwave generators driven by induction accelerators. The relativistic klystron two-beam accelerator concept involves the transport of kiloamperes of current through many microwave output sections. Energy in both the cumulative and regenerative beam breakup modes could grow in these two-beam accelerator systems to levels that beam loss would occur. For induction accelerators the current term can be several orders of magnitude larger than values common for rf accelerators, presenting a difficult challenge for beam stability. In this paper we present experimental evidence of beam breakup in the output section of a high-power microwave generator, methods used to suppress the higher order modes in the power extraction sections, and computer modeling for transverse instabilities in larger relativistic klystron two-beam accelerator systems.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10131408
• Report Number(s): UCRL-JC--110195; CONF-9208109--76; ON: DE93007110
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303
ACCELERATORS
EXPERIMENTAL FACILITIES AND EQUIPMENT
INSTABILITY
KLYSTRONS
RELATIVISTIC RANGE
RF SYSTEMS
TRAVELLING WAVES