Sep 20 – 24, 2021
America/Vancouver timezone

Development of Permanent-Magnet-Type ECR Ion Source and Double-Einzel Lens Type LEBT for Compact Neutron Source RANSⅢ

Not scheduled
Poster Applications and related technologies Poster Session 2


Shota Ikeda (RIKEN RAP NBTT)


At RIKEN, a transportable accelerator compact neutron source (RANS-III) is under development for non-destructive inspection of the degradation of old concrete and reinforcing steel on site. RANS-III is applied to bridges and other structures. The 500 MHz radio frequency quadrupole (RFQ) linear accelerator (linac) used as a RANS-Ⅲ accelerator. As a proton ion source for RANS-III, we developed a permanent-magnet electron-cyclotron-resonance (ECR) ion source and a double Einzel lens. The ECR ion source consists of a 2.45 GHz magnetron, a ridge tuner, plasma chamber, neodymium magnet, and reveler grids. We fabricated a permanent-magnet ECR ion source and double Einzel lens. Subsequently, we conducted a beam property test of the ECR ion source and Einzel lens with a beamline consisting of a Faraday cup and a bending magnet. We measured the effect of the hydrogen-gas flow rate on the beam current and proton fraction and evaluated the ion source conditions for injection into the RFQ linac.

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Primary author

Shota Ikeda (RIKEN RAP NBTT)


Dr Tomohiro Kobayashi (Neutron Beam Technology Team, RIKEN Center for Advanced Photonics, RIKEN) Dr Yoshie Otake (Neutron Beam Technology Team, RIKEN Center for Advanced Photonics, RIKEN)

Presentation materials