The Naval Research Laboratory Modified Betatron Accelerator and assessment of its results

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860764· OSTI ID:5519492

Kapetanakos, C A; Len, L K; Smith, T; Marsh, S J; Loschialpo, P; Dialetis, D; Mathew, J ^[1]

---

1. Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375 (United States)

In this paper the experimental results of the Naval Research Laboratory (NRL) Modified Betatron Accelerator (MBA) [Phys. Rev. Lett. [bold 64], 2374 (1990)] are briefly summarized and assessed. These results show that the addition of the strong focusing (SF) field made a substantial improvement in the confining properties of the device, at least in the intermediate time scale, and that the SF field together with the finite resistivity of the vacuum chamber wall is responsible for the trapping of the beam. There is extensive experimental evidence, suggesting that the slow beam loss during acceleration is caused by the cyclotron resonances. Reduction of several field errors together with operation at higher toroidal and SF field led to beam energies in excess of 20 MeV, while the trapped current was above 1 kA. Preliminary beam extraction experiments with 12 resonant coils have shown that a [similar to]80 G field disturbance is required to extract the beam from the MBA.

• OSTI ID: 5519492
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 5:7; ISSN 0899-8221; ISSN PFBPEI
• Country of Publication: United States
• Language: English

Related Subjects

661220* -- Particle Beam Production & Handling
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATORS
ANNULAR SPACE
BEAM EXTRACTION
BEAMS
BETATRONS
CLOSED CONFIGURATIONS
CONFIGURATION
CYCLIC ACCELERATORS
CYCLOTRON RESONANCE
ELECTRON BEAMS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FOCUSING
LEPTON BEAMS
LEPTONS
MAGNETIC FIELD CONFIGURATIONS
PARTICLE BEAMS
RESONANCE
SPACE
TOROIDAL CONFIGURATION
TRAPPED ELECTRONS
Ta
Targets-- (1992-)