Development of a Spatially Resolved $$^3$$3He Quasi-Particle Detector
Development of a Spatially Resolved $$^3$$3He Quasi-Particle Detector
复制标题
空间分辨 $$^3$$3He 准粒子探测器的开发
DOI：
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发表时间：
2016
期刊：
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通讯作者：
M. Lilly
中科院分区：
文献类型：
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作者：
C. Barquist;P. Zheng;W. G. Jiang;Y. Lee;Y. Yoon;T. Schumann;J. Nogan;M. Lilly
已知安德列夫表面束缚态存在于超流体的边界上。然而，它们与块状准粒子相互作用的详细性质还不是很清楚。以类似于角度分辨光电发射光谱的方式，可以通过测量从表面散射的大块准粒子的动量变化来探测表面态。为了进行这样的测量，我们设计了一台空间分辨准粒子探测器。该探测器由对准粒子通量敏感的微机械谐振器阵列组成。该探测器是基于以前开发的微机械谐振器，已成功地用于研究超流体$3$$3He-B和$$^4$4He。文中介绍了探测器的设计和制作工艺。
Andreev surface bound sates are known to exist on the boundaries of superfluid $$^3$$3He-B. However, the detailed nature of their interaction with bulk quasi-particles is not well known. In a manner similar to angle-resolved photo-emission spectroscopy, surface states can be probed by measuring the change in momentum of bulk quasi-particles scattered from the surface. In order to make such a measurement, we have designed a spatially resolved quasi-particle detector. The detector consists of an array of micro-machined resonators, which are sensitive to quasi-particle flux. The detector is based on previously developed micro-machined resonators, which have been successfully used to study superfluid $$^3$$3He-B and $$^4$$4He. Presented here is the design of the detector and the fabrication procedure.