Characteristics of helium ion beams from multicusp source and study of beam transport

Author

Sasao, M. ; Nishiura, Masaki ; Guharay, Samar K. ; Kuroda, Tadahiro ; Hamabe, Makoto ; Ramos, H.J.

Author_Institution

NIFS

Volume

2

fYear

1999

fDate

1999

Firstpage

1306

Abstract

A test stand with a multicusp type He⁺ ion source and an electrostatic transport system was built for the study of beam characteristics at relatively low energy, E<10 keV, and beam transport in a space-charge dominated region with β(=v/c)<0.0025. The measured normalized beam emittance (90%) of the He⁺ beam extracted from a compact multicusp source is about 0.08 π mm-mrad for the emission current density of about 5-15 mA/cm² at 6-9 kV. An electrostatic quadrupole transport system (ESQ) is designed for this beam. Preliminary experimental results show that the ESQ has a potential to transport a beam without any significant emittance growth over a length of about 50 cm

Keywords

beam handling equipment; electrostatic devices; helium ions; ion beams; ion sources; particle beam diagnostics; positive ions; space charge; 0 to 10 keV; 50 cm; 6 to 9 kV; He; He⁺ ion source; beam characteristics; beam transport; electrostatic transport system; ion beams; low energy; multicusp source; normalized beam emittance; quadrupole transport system; space-charge dominated region; test stand; Apertures; Current measurement; Electrodes; Electrostatic measurements; Helium; Ion beams; Ion sources; Particle beams; Plasma transport processes; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795530

Filename

795530