Power excitation by the use of a rf wiggler
It is well-known that there are difficulties to obtain rf power sources of significant amount for frequencies larger than 3 GHz. Yet, rf sources in the centimeter/millimeter wavelength range would be very useful to drive, for example, high-gradient accelerating linacs for electron-positron linear colliders. We would like to propose an alternative method to produce such radiation. It makes use of a short electron bunch traveling along the axis of a waveguide which is at the same time excited by a TM propagating electromagnetic wave. It is well known that radiation can be obtained by wiggling the motion of the electrons in a direction perpendicular to the main one. The wiggling action can be included by electromagnetic fields in a fashion similar to the one caused by wiggler magnets. We found that an interesting mode of operation is to drive the waveguide with an excitation frequency very close to the cut off. For such excitation, the corresponding e.m. wave travels with a very large phase velocity which in turn has the effect to increase the wiggling action on the electron bunch. Our method, to be effective, relies also on the coherence of the radiation; that is the bunch length is taken to be considerably shorter than the radiated wavelength. In this case, the total power radiated should be proportional to the square of the total number of electrons in the bunch. The paper concludes with possible modes of operation, a list of performance parameters and a proposed experimental set-up.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5018966
- Report Number(s):
- BNL-47616; CONF-9206193-1; ON: DE92016097
- Resource Relation:
- Conference: Advanced accelerator concepts workshop, Port Jefferson, NY (United States), 14-20 Jun 1992
- Country of Publication:
- United States
- Language:
- English
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Power excited by the use of a rf wiggler
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Related Subjects
LINEAR ACCELERATORS
WIGGLER MAGNETS
RF SYSTEMS
BEAM BUNCHING
ENERGY LOSSES
EQUATIONS OF MOTION
POWER GENERATION
WAVE PROPAGATION
WAVEGUIDES
ACCELERATORS
BEAM DYNAMICS
DIFFERENTIAL EQUATIONS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUATIONS
EQUIPMENT
LOSSES
MAGNETS
PARTIAL DIFFERENTIAL EQUATIONS
430303* - Particle Accelerators- Experimental Facilities & Equipment