Collective ion acceleration. Progress report, October 1978-September 1979. [Research activities at LASL]

Technical Report · Tue Dec 01 04:00:00 EST 1981

OSTI ID:5310470

Shanahan, W R; Faehl, R J

Numerical and analytic investigations of various aspects of collective ion acceleration, with particular emphasis on the principle of autoresonant acceleration, are described. Both extensions of earlier investigations and the initiation of new areas of study have been pursued. Simulations of slow cyclotron wave growth in strong magnetic fields and in the presence of beam scatter have been effected, representing important extensions of previous work. Further analysis of the self-driven antenna concept exhibits the utility of this scheme in achieving wave excitation. Among the new topics of study, wave compression and the investigation of methods with which to achieve effective suppression of the unwanted zero-frequency cyclotron wave receive particularly concentrated attention. Preliminary studies of beam and wave propagation in inhomogeneous magnetic fields have been effected. The effects of the zero-frequency cyclotron mode excited by anode shorting of the beam self-electric field are found to be ameliorated by a combination of a spatially non-adiabatically varying guide magnetic field and suitable initial flaring of beam momentum. Methods of collective ion acceleration not embodying the autoresonant acceleration concept are also studied. Particular emphasis is given to the phase modulated accelerator. In addition to our studies of collective ion acceleration, we devote some preliminary attention to questions concerning propagation across magnetic fields of the neutralized plasma beams, which will be one of the final manifestations of such acceleration.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5310470
• Report Number(s): LA-8961-PR; ON: DE82010210
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430302 -- Particle Accelerators-- Injection & Extraction Systems
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
ACCELERATORS
BEAM DYNAMICS
BEAM INJECTION
BEAM OPTICS
BEAM TRANSPORT
BEAMS
BREMSSTRAHLUNG
COLLECTIVE ACCELERATORS
CYCLOTRON RADIATION
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELECTRON RINGS
ION BEAMS
MAGNETIC FIELDS
OSCILLATIONS
PERFORMANCE
PHASE OSCILLATIONS
RADIATIONS
RESEARCH PROGRAMS
WAVE PROPAGATION