Paper Abstract and Keywords |
Presentation |
2007-10-17 13:50
Infrared filter for superconducting tunnel junction array particle detector Shigetomo Shiki, Masahiro Ukibe, Yutaka Shimizugawa (AIST), Shigeo Tomita, Yuki Sato (Univ. Tsukuba), Ryutaro Maeda, Masataka Ohkubo (AIST) Link to ES Tech. Rep. Archives: SCE2007-20 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
For application of superconducting detectors to mass spectrometry,
through holes are required between an ion source at room temperature and
a superconducting detector set at low temperature in order for particles to impinge the detectors.
The room temperature infrared radiation causes
an improper operation of the superconducting detectors.
We fabricated a free-standing metal-mesh infrared blocking filter for the radiation shield
at an AIST MEMS foundry.
The filter consist of free-standing Cu film with a size of 12mm$\times$5mm
and a thickness of 500nm, which is reinforced by Si support.
The Cu mesh has a hole array with a diameter of 2$\mu$m and
a pitch of 3.5$\mu$m.
The transmission of the room temperature blackbody radiation was only 1\%, while
the ion transmissoin was 20\%, which is consistent
with the geometrical structure of the hole array.
The holding time of a $^{3}$He cryostat and I-V characteristics of a superconducting tunnel junction
were unaffected by the room temperature infrared radiation. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
mass spectrometry / infrared blocking filter / energy sensitive particle detector / superconducting tunnel junction / cryogenics / / / |
Reference Info. |
IEICE Tech. Rep., vol. 107, no. 259, SCE2007-20, pp. 13-16, Oct. 2007. |
Paper # |
SCE2007-20 |
Date of Issue |
2007-10-10 (SCE) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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