Eur. Phys. J. D (2012) 66: 37
https://doi.org/10.1140/epjd/e2012-20641-4

Regular Article

Increase in the beam intensity of the linac-based slow positron beam and its application at the Slow Positron Facility, KEK

¹ Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
² Accelerator Laboratory, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
³ Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
⁴ Advanced Science Research Center, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan

^a e-mail: ken.wada@kek.jp

Received: 2 November 2011
Received in final form: 23 December 2011
Published online: 16 February 2012

Abstract

Recent developments of the Slow Positron Facility at the Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) are reported. We have modified the converter/moderator assembly for slow positron beam production, yielding an increase of an order of magnitude in the intensity of the beam. The first observation of the photodetachment of the positronium negative ion (Ps⁻), and the installation of a reflection high-energy positron diffraction (RHEPD) station and the initial data obtained are reported.