Method of Canceling Energy Fluctuations of a Van de Graaff Ion Beam

Journal Article · Wed Jan 01 04:00:00 EST 1958 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1716015· OSTI ID:4298443

Parks, P. B.; Newson, H. W.; Williamson, R. M.

A varying correction voltage is applied to the target which cancels beam energy fluctuations. This correction voltage is a known, constant multiple of a small, variable voltage which must be applied to the outer plate of an electrostatic analyzer to keep the beam centered at the analyzer image slits. The beam current at the analyzer image slits provides the signal which, when amplified by an electronic device called the Homogenizer, drives both the outer analyzer plate and the target. The energy spread is reduced to 250 plus or minus 120 ev and is probably due only to the ion source. If the HH+ beam is put through the analyzer, the unlimited H+ beam also has an energy spread of 250 ev. The 1.76-Mev C/sup 13/(p, gamma )and 0.992-Mev Al/sup 27/(p, plus or minus ) resonances were used to test performance. Our data are consistent with GAMMA (C/ sup 13) = 75 ev and GAMMA (Al/sup 27/) = 100 ev. The upper limit for the C/sup 13) width is 150 ev.

• Research Organization: Duke Univ., Durham, N.C.
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-001443
• OSTI ID: 4298443
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 29; ISSN 0034-6748
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM 27
CARBON 13
CONTROL
CURRENTS
ELECTRIC POTENTIAL
ELECTRONIC EQUIPMENT
ELECTROSTATICS
ENERGY
GAMMA RADIATION
HALF-LIFE
HYDROGEN
ION BEAMS
ION SOURCES
MEASURED VALUES
MONOCHROMATORS
NUCLEAR REACTIONS
PARTICLE ACCELERATORS AND HIGH-VOLTAGE MACHINES
PLANNING
PROTON BEAMS
RESONANCE
STABILITY
TARGETS
VAN DE GRAAFF ACCELERATORS