Development of a vertical slow positron beamline at AIST | Zendy

Brian E. O’Rourke | Zendy; Nagayasu Oshima | Zendy; A. Kinomura | Zendy; Ryoichi Suzuki | Zendy

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Development of a vertical slow positron beamline at AIST

Author(s) -

Brian E. O’Rourke,

Nagayasu Oshima,

A. Kinomura,

Ryoichi Suzuki

Publication year - 2014

Language(s) - English

Resource type - Conference proceedings

DOI - 10.7567/jjapcp.2.011304

Subject(s) - beamline , positron , microbeam , microprobe , beam (structure) , physics , solenoid , nuclear physics , optics , electron , quantum mechanics

A new slow positron beamline with two measurement ports has been installed at AIST. Positrons are generated using the 70 MeV AIST LINAC and are guided to the measurement ports using a solenoid magnetic field. Both beam ports are arranged vertically with the positron beam incident on the sample from above and samples loaded horizontally. Port No. 1 is designed for positron annihilation lifetime spectroscopy (PALS) and Doppler broadening of annihilation radiation (DBAR) measurements with a ∼10 mm diameter positron beam. The beamline on port No. 2 contains a transmission type remoderator for a brightness enhanced positron microbeam, similar to the existing positron probe microanalyzer (PPMA) at AIST.

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