Studies of the electron-ring dynamics in a modified betatron for large ring displacements from the minor axis. Memorandum report

Technical Report · Thu Jan 29 04:00:00 EST 1987

OSTI ID:6797099

Marsh, S J; Kapetanakos, C A

A two-dimensional 3V particle-in-cell (PIC) computer code is used to study the electron-ring dynamics in a magnetic field configuration that is very similar to that of the modified betatron experiment. The electron-ring dynamics was simulated over approximately 75 revolutions around the major axis, i.e., over several bounce periods. By comparing the electron-ring dynamics in idealized magnetic fields with that in the experiment, it was determined that the field-index spatial fluctuations that occur in the experiment are harmless to high-current rings. In addition, the computer-simulation results have confirmed our theoretical predictions concerning the variations of the ring's equilibrium position with the vertical field as well as the existence, in the ring-centroid-instability gap, of ring orbits having figure-eight (8) shape.

• Research Organization: Naval Research Lab., Washington, DC (USA)
• OSTI ID: 6797099
• Report Number(s): AD-A-177417/3/XAB; NRL-MR-5933
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATORS
BEAMS
BETATRONS
COMPUTERIZED SIMULATION
CYCLIC ACCELERATORS
DYNAMICS
ELECTRODYNAMICS
ELECTRON BEAMS
LEPTON BEAMS
MAGNETIC FIELDS
MECHANICS
ORBITS
PARTICLE BEAMS
RINGS
SIMULATION