Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795530
