Design of an Acceleration Gap for Brightness Enhancement in a Reactor-Based Slow Positron Beamline

• Authors: Y. Kuzuya , N. Oshima , A. Kinomura , A. Yabuuchi
• Languages of publication: EN

Abstracts

EN

Design of an acceleration gap using mesh electrodes of the brightness enhancement system for the slow positron beamline of Kyoto University research reactor was studied to improve the performance of brightness enhancement. The transmittance and the increase in the angular divergence of the beam resulting from acceleration with the mesh electrode were estimated by trajectory simulations. The effect of the increase in the beam emittance on the beam radius at the focus point was estimated based on the analytical solution of the beam envelope equation. Using the obtained beam transmittance and beam radius, the beam brightness after remoderation was evaluated. Then, the influence of the mesh electrode configuration on the brightness was investigated.

Keywords

EN

78.70.Bj; 41.75.Fr; 29.27.Eg; 41.85.Ja

Discipline

• 29.27.Eg: Beam handling; beam transport
• 41.85.Ja: Particle beam transport
• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 41.75.Fr: Electron and positron beams

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 5
• Pages: 1620-1623

Dates

published

2017-11

Contributors

author

Y. Kuzuya

• Research Reactor Institute, Kyoto University, Kumatori-cho, Osaka 590-0494, Japan

author

N. Oshima

• National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba-shi, Ibaraki 305-8568, Japan

author

A. Kinomura

• Research Reactor Institute, Kyoto University, Kumatori-cho, Osaka 590-0494, Japan

author

A. Yabuuchi

• Research Reactor Institute, Kyoto University, Kumatori-cho, Osaka 590-0494, Japan

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Identifiers

DOI

10.12693/APhysPolA.132.1620