Emittance scanner for intense low-energy ion beams

Conference · Sat Jan 01 00:00:00 EST 1983

DOI:https://doi.org/10.1109/TNS.1983.4332762· OSTI ID:6176438

Allison, P W; Sherman, J D; Holtkamp, D B

An emittance scanner has been developed for use with low-energy H/sup -/ ion beams to satisfy the following requirements: (1) angular resolution of +-1/2 mrad, (2) small errors from beam space charge, and (3) compact and simple design. The scanner consists of a 10-cm-long analyzer containing two slits and a pair of electric deflection plates driven by a +-500-V linear ramp generator. As the analyzer is mechanically driven across the beam, the front slit passes a thin ribbon of beam through the plates. The ion transit time is short compared with the ramp speed; therefore, the initial angle of the ions that pass through the rear slit is proportional to the instantaneous ramp voltage. The current through the rear slit then is proportional to the phase-space density d/sup 2/i/dxdx'. The data are computer-analyzed to give, for example, rms emittance and phase-space density contours. Comparison of measured data with those calculated from a prepared (collimated) phase space is in good agreement.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6176438
• Report Number(s): LA-UR-83-707; CONF-830311-81; ON: DE83009958
• Resource Relation: Journal Volume: 30; Journal Issue: 4; Conference: Particle accelerator conference, Santa Fe, NM, USA, 21 Mar 1983
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM EMITTANCE
BEAM MONITORS
ANGULAR DISTRIBUTION
BEAM SCANNERS
HYDROGEN 1 MINUS BEAMS
KEV RANGE 10-100
TWO-DIMENSIONAL CALCULATIONS
BEAMS
DISTRIBUTION
ENERGY RANGE
ION BEAMS
KEV RANGE
MEASURING INSTRUMENTS
MONITORS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics
430303 - Particle Accelerators- Experimental Facilities & Equipment