Beam extraction from the University of Illinois sector-focussed cyclotron

Journal Article · Thu Nov 01 04:00:00 EST 1962 · Nuclear Instruments and Methods

DOI:https://doi.org/10.1016/S0029-554X(62)80062-7· OSTI ID:4730401

Brussel, M. K.; Allen, J. S.; Ernest, L. E.

S>Protons have been extracted in the energy range 5 to 15 Mev from the University of IIlinois spiral ridge cyclotron. A new extraction system has been constructed consisting of a primary electrostatic deflector capable of maintaining a voltage of 100 kv, a secondary quadrupole deflector which radially focusses a beam by electrostatic and magnetic means, and a third electrostatic steering deflector. Four quadrant coils are required for proper delivery of the internal beam into the deflection system. Except near 15 Mev, where the thickness of the primary deflector septum limits the extractlon efficiency, approximately 5% of the internal beam can be focussed into a spot approximately 1 cm/sup 2/ in area in the experimental area 25 ft from the cyclotron. The external beam has an energy spread of approximately 100 kev; a divergence of plus or minus 0.002 radians horizontally and a divergence of plus or minus 0.003 radians vertically when no external focussing elements are present. Beam currents of 200 mu A at an extraction radius of 47 cm have been routinely utilized. (auth)

• Research Organization: Univ. of Illinois, Urbana
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-007403
• OSTI ID: 4730401
• Journal Information: Nuclear Instruments and Methods, Journal Name: Nuclear Instruments and Methods Journal Issue: C Vol. 18-19; ISSN 0029-554X
• Publisher: Elsevier
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BEAMS
COILS
CYCLOTRONS
EFFICIENCY
ELECTRIC FIELDS
ELECTRIC POTENTIAL
ELECTRODES
ELECTROSTATICS
ENERGY
ENERGY RANGE
ILLINOIS
LENSES
MAGNETIC FIELDS
OPTICAL SYSTEMS
PHYSICS
PLATES
PROTON BEAMS
QUADRUPOLES
SPECTRA
THICKNESS