New design method for the extraction electrodes of high-brightness space charge dominated ion beams

Journal Article · Fri Mar 01 00:00:00 EST 1996 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1146713· OSTI ID:434565

Lemaitre, S; Reckenfelderbaeumer, R; Paetz gen Schieck, H ^[1]

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1. Universitaet zu Koeln, Institut fuer Kernphysik, Zuelpicher Strasse 77, 50937 Koeln (Germany)

A nonideal potential distribution inside an ion gun gives rise to emittance growth of the beam. The aberrations caused by the lens system (extractor) and the space charge of the beam can be reduced to a minimum by appropriately modifying the shape of the anode. For an intense Cs{sup +} beam this was reached in a computer experiment and realized with the aid of numerically controlled machines. Experimentally the brightness of the beam could be shown to exceed the value at the conventional design by a factor of about 3. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 434565
• Report Number(s): CONF-9509125-; ISSN 0034-6748; TRN: 97:003670
• Journal Information: Review of Scientific Instruments, Vol. 67, Issue 3; Conference: 6. international conference on ion sources, Whistler (Canada), 10-16 Sep 1995; Other Information: PBD: Mar 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ION BEAMS
BEAM EXTRACTION
CESIUM IONS
ELECTRODES
BEAM EMITTANCE
SPACE CHARGE
GEOMETRICAL ABERRATIONS
COMPUTERIZED SIMULATION