JJAP Conference Proceedings

JJAP Conf. Proc. 2, 011304 (2014) doi:10.7567/JJAPCP.2.011304

Development of a vertical slow positron beamline at AIST

Brian E. O’Rourke, Nagayasu Oshima, Atsushi Kinomura, Ryoichi Suzuki

  1. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
  • Received May 31, 2014
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Abstract

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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