DEVELOPMENT OF A SPATIALLY RESOLVED 3HE QUASI-PARTICLE DETECTOR
Colin S Barquist, Pan Zheng, Wenguang G Jiang, Yoonseok Lee, Yong-Kyu Yoon, Todd Schumann, John Nogan and Michael Lilly
Andreev surface bound sates are known to exist on the boundaries of superfluid 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 3He-B and 4He. Presented here is the design of the detector and the fabrication procedure.
Keywords: Helium, 3He-B, Quasi-particle and Detector