ON THE INJECTION OF ELECTRONS IN A BETATRON

Journal Article · Mon Feb 01 04:00:00 EST 1960 · Atomnaya Energ.

OSTI ID:4171491

Yashukov, V P

The influence of the injection pulse configuration on the maximum gamma radiation intensity was studied in a 100-Mev sychrotron with betatron injection. The experiments were carried out with a 2 to 10 mu sec rectangular pulse generator, a sinusoidal pulse generator with pulses of 1.2 to 12 mu sec at the pulse base, a generator of 2 mu sec pulses with a variable front at the capture area (such a configuration is . achieved by superimposing the rectangular pulse over a sinusoidal), and a generator of package pulses of nearly 8 mu sec, with up to three pulses per package. All measurements were made in the sychrotron superstructure, with 30-kv injection, with a one-liter ionization chamber placed 2 m from a target acting as a transducer. With single injections the pulse configuration did not affect the maximum intensity. In all cases the maximum intensity was found at the apex of the pulse or at the front angle, the shelf of a rectangular pulse. At other pulse regions the intensity of gamma radiation at injection is smaller. The maximum number of particles in the chamber per cycle was 10 to 25% of the theoretical charge maximum. The intensification of gamma radiation can be achieved by bringing the number of particles per cycle closer to the theoretical maximum and by maintaining a larger number of particles on the orbits after capture. (R.V.J.) A new low background target room was constructed for the Bartol-ONR Van de Graaff generator. This room is constructed of low radioactivity content concrete and serves to shield the target area from the radiation arising from the soil, the beam analyzing magnet, and the small Bartol generator. Over the energy range from 400 kev to 3 Mev, the natural radioactive background is at least a factor of 5 lower than in the original target room. The effects of neutrons from the analyzing magnets and the small machine were reduced to a negligible amount. The cost of the special concrete used in this structure was less than twice the cost of normal concrete. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-14-012270
• OSTI ID: 4171491
• Journal Information: Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 8
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

BETATRONS
CAPTURE
CONFIGURATION
EFFICIENCY
ELECTRIC CHARGES
ELECTRON BEAMS
ELECTRONS
ENERGY RANGE
GAMMA RADIATION
INJECTION
IONIZATION CHAMBERS
ORBITS
PHYSICS
PULSE GENERATORS
PULSES
RADIATION DOSES
SYNCHROTRONS
TARGETS
TESTING
TRANSDUCERS
VARIATIONS
VOLUME