THE LIVERMORE VARIABLE-ENERGY 90-INCH CYCLOTRON

Journal Article · Thu Dec 01 04:00:00 EST 1960 · Nuclear Instr. & Methods

DOI:https://doi.org/10.1016/0029-554X(60)90079-3· OSTI ID:4094035

Hernandez, H P; Peterson, J M; Smith, B H; Taylor, C J

A variable-energy cyclotron is described which accelerates protons from 2.6 to 15 Mev, deuterons from 5.2 to 12.5 Mev, and alpha particles from 10.4 to 25 Mev. The 90-in.diameter magnet incorporates a special fringing field to reduce the angular divergence of the emerging beam. The single dee is driven by a crystal-controlled power amplifier, variable in steps of 55 kc/sec from 4.0 to 9.5 Mc/sec. The internal beam is limited to 200 mu A to avoid septum damage, and 15 to 25% of this beam can be extracted. The external beam has a 2% total spread in energy, and an individual pulse in the beam has a time spread of 2% of the radiofrequency period. Most of the external beam is contained in an elliptical cone with half angles of 0.30 and 0.15 deg . (auth)

• Research Organization: Univ. of California. Livermore
• NSA Number: NSA-15-010192
• OSTI ID: 4094035
• Journal Information: Nuclear Instr. & Methods, Journal Name: Nuclear Instr. & Methods Vol. Vol: 9
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AMPLIFIERS
ANGULAR DISTRIBUTION
BEAM OPTICS
BEAMS
CONTROL
CRYSTALS
CURRENTS
CYCLOTRONS
DISTRIBUTION
ELECTRODES
ENERGY
ENERGY RANGE
FREQUENCY
MAGNETIC FIELDS
MAGNETS
PHYSICS
PLANNING
POWER
PROTON BEAMS
PULSES
RADIO WAVES
VARIATIONS