THE EFFECT OF THE SPACE CHARGE ON THE FREQUENCY OF THE FREE OSCILLATIONS OF THE PARTICLES IN AN ISOCHRONOUS CYCLOTRON

Journal Article · Sun Sep 01 04:00:00 EDT 1963 · At. Energ. (USSR)

OSTI ID:4132651

Glazov, A A; Dzhelepov, V P; Zamolodchikov, V P; Kol'ga, V V; Kropin, A A; Onishchenko, L M; Shvabe, E

If the particle beam intensity is increased, the chargedensity effects of the circulating beam of the accelerator become more important. In order to gain additional information on this correlation, the dependence of the frequency of the free axial oscillations on the spatial charge density was measured on molecular hydrogen particles accelerated up to 12 Mev in an accelerator possessing a spiral-shaped magnetic field. As the isochronous cyclotron, provided with a spatially variable magnetic field, has a maximum current of 20 to 30 mu a, it allows an experimental study of the effect of the space charge. The axial oscillation frequency was measured by determining the resonance excitation of the free oscillations due to the external field. A Ta target was used for the measurements. The effect of the space charge on the free oscillation frequency was found to exceed by a factor of 2 to 3 the mean square error in the resonance frequency measurements. An increased effect was noted at small radii; this is probably due to the small azimuthal expansion of the particle bunch and to the decrease of the vertical oscillation frequency. The space charge also causes a shift of the zone of the resonance interactions. The experimental results were found to agree well with the theoretical predictions. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-004374
• OSTI ID: 4132651
• Journal Information: At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 15
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

BEAMS
BUNCHING
CHARGED PARTICLES
CONFIGURATION
CURRENTS
CYCLOTRONS
DENSITY
ELECTRIC CHARGES
ENERGY RANGE
ERRORS
EXCITATION
FREQUENCY
HYDROGEN
INTERACTIONS
ION BEAMS
MAGNETIC FIELDS
MEASURED VALUES
MODULATION
MOLECULES
NUMERICALS
OPTICAL SYSTEMS
ORBITS
OSCILLATIONS
PHYSICS
RESONANCE
SPACE CHARGE
STABILITY
TANTALUM
TARGETS
VARIATIONS
VELOCITY