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

M Sasao,Masaki Nishiura,S K Guharay,Tadahiro Kuroda,Makoto Hamabe,Henry J Ramos

Particle Accelerator Conference, 1999. Proceedings of the 1999（2013）

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摘要

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

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关键词

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,low energy,multicusp source,normalized beam emittance,quadrupole transport system,space-charge dominated region,test stand,electrodes,helium,system testing,current density,ion beam,apertures

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