Development of Positron Microbeam in AIST

摘要：

To improve the spatial resolution of positron annihilation spectroscopy (PAS), a system to produce an intense positron microbeam was developed in AIST. A slow positron beam, which was produced by an electron linear accelerator, was focused by a lens onto a remoderator to enhance its brightness. The brightness-enhanced beam with an intensity of ≈1×106 e+/s was extracted from the remoderator and focused onto the sample by a lens. The beam size at the sample was 25 μm, which is more than two and half orders of magnitude smaller than that in the magnetic transport system (≈10 mm). Hence, the spatial resolution of PAS with an AIST positron microbeam can be drastically improved relative to PAS using conventional methods.

关键词： Positron probe microanalyzer positron microscope positron microbeam

作者: N.Oshima R.Suzuki T.Ohdaira A.Kinomura T.Narumi A.Uedono M.Fujinami

作者单位: Research Institute of Instrumentation Frontier (RIIF),National Institute of Advanced Industrial Scie Research Institute of Instrumentation Frontier (RIIF),National Institute of Advanced Industrial Scie Institute of Applied Physics,University of Tsukuba,Tsukuba,Ibaraki 305-8573,Japan Department of Applied Chemistry,Chiba University,1-33 Yayoi,Inage,Chiba 263-8552,Japan

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 238-242

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）