Performance of a volume H sup minus ion source with a toroidal discharge chamber

Conference · Mon Jan 01 04:00:00 EST 1990 · Review of Scientific Instruments; (USA)

OSTI ID:7168380

Prelec, K; Alessi, J G ^[1]

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1. AGS Department, Brookhaven National Laboratory, Upton, New York 11973 (US)

A new volume H{sup {minus}} ion source with a toroidal discharge chamber has been designed. Its main feature is a full rotational symmetry, including a conically shaped dipole field separating the main toroidal discharge from the central extraction chamber. Measurements of the H{sup {minus}} yield and the accompanying electron component have been performed, both for this rotationally symmetric geometry and for a standard line dipole geometry. With the rotationally symmetric geometry, the H{sup {minus}} yield was up to 30 mA through an aperture of 1 cm{sup 2} , while the ratio {ital I}{sub {ital e}} /{ital I}{sub H{sup {minus}}} depended greatly on the value of {ital I}{sub H{sup {minus}}} and was about 20--30 for the highest currents. The beam emittance was measured for the rotationally symmetric geometry, and was found to be {epsilon}{sub {ital n}} (90%){approx}0.094 {pi} cm mrad for a 21-mA beam. An estimate of the H{sup {minus}} ion temperature from the measured emittance gives a value of approximately 3.6 eV.

• OSTI ID: 7168380
• Report Number(s): CONF-890703--
• Conference Information: Journal Name: Review of Scientific Instruments; (USA) Journal Volume: 61:1
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301* -- Particle Accelerators-- Ion Sources
BEAM CURRENTS
BEAM EMITTANCE
BNL
CHARGED PARTICLES
CURRENTS
DESIGN
ENERGY RANGE
EV RANGE
EV RANGE 01-10
HYDROGEN IONS
ION SOURCES
ION TEMPERATURE
IONS
MAGNETIC FIELDS
MEASURING METHODS
NATIONAL ORGANIZATIONS
PERFORMANCE
US AEC
US DOE
US ERDA
US ORGANIZATIONS