Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 718, Issue -, Pages 519-521Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2012.11.106
Keywords
Tracking detectors; Nuclear emulsion; Directional dark matter search
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Funding
- Grants-in-Aid for Scientific Research [23840018, 23403003] Funding Source: KAKEN
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Fine grained nuclear emulsion with several 10 nm silver halide crystals can detect submicron tracks. This detector is expected to be worked as dark matter detector with directional sensitive. Now, nuclear emulsion became possible to be produced at Nagoya University, and extreme fine grained nuclear emulsion with 20 nm diameter was produced. Using this emulsion and new reading out technique with expansion technique, for optical selection and X-ray microscopy, recoiled tracks induced by dark matter can be detected automatically. Then, readout efficiency is larger than 80% at 120 nm, and angular resolution for final confirmation with X-ray microscopy is 20 degrees. In addition, we started to construct the R&D underground facility in Gran Sasso. (C) 2012 Elsevier B.V. All rights reserved.
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