[15a-PB2-1~22] 8 Plasma Electronics

[15a-PB2-9] Improving Multipole Magnets/Conductance and Emittance Measurements on ECRIS

〇Shuhei Harisaki¹, Takayuki Omori¹, Kazuki Okumura¹, Wataru Kubo¹, Yushi Kato¹ (1.Osaka Univ.)

Keywords:multipolle magnets, emittance

Electron cyclotron resonance ion sources (ECRIS) are used in various fields such as accelerator physics, engineering, cancer therapy, and ion engine in the satellite. We are aiming to improve producing multicharged ions efficiently at the point of view from length of multipole magnets and vacuum conditions in the ECRIS. The diameter of connection pipe between main chamber and diffusion pump was made larger to improve vacuum conductance. Moreover, length of multipole magnets with the direction along to geometrical axis in the ECRIS was extended. The effects of these improving are investigated experimentally to measure pressure in the vacuum chamber, beam intensity, charge state distributions (CSD) of extracted ion beams, and plasma parameters. Purity of extracted ion beams and magnetic confinement have been enhanced. These results are expected to have positive effects on the production of various species and synthesized ion beams, e.g. production of iron endohedral fullerene in the future experiments in the ECRIS.