NEWS: Nuclear Emulsions for WIMP Search
NEWS: Nuclear Emulsions for WIMP Search
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DOI：
10.1088/1742-6596/718/4/042018
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发表时间：
2016-04
期刊：
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通讯作者：
A. Aleksandrov;A. Anokhina;T. Asada;D. Bender;I. Bodnarchuk;A. Buonaura;S. Buontempo;M. Chernyavskii;A. Chukanov;L. Consiglio;N. D’Ambrosio;G. Lellis;M. Serio;A. Crescenzo;N. Marco;S. Dmitrievski;T. Dzhatdoev;R. Fini;S. Furuya;G. Galati;V. Gentile;S. Gorbunov;Y. Gornushkin;A. Guler;H. Ichiki;Ç. Kamışcıoğlu;M. Kamiscioglu;T. Katsuragawa;M. Kimura;N. Konovalova;K. Kuge;A. Lauria;P. Loverre;S. Machii;A. Managadze;P. Monacelli;M. Montesi;T. Naka;M. Nakamura;T. Nakano;A. Pastore;D. Podgrudkov;N. Polukhina;F. Pupilli;T. Roganova;G. Rosa;O. Sato;T. Shchedrina;S. Simone;C. Sirignano;A. Sotnikov;N. Starkov;P. Strolin;Y. Tawara;V. Tioukov;A. Umemoto;Max Vladymyrov;M. Yoshimoto;S. Zemskova
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文献类型：
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作者：
A. Aleksandrov;A. Anokhina;T. Asada;D. Bender;I. Bodnarchuk;A. Buonaura;S. Buontempo;M. Chernyavskii;A. Chukanov;L. Consiglio;N. D’Ambrosio;G. Lellis;M. Serio;A. Crescenzo;N. Marco;S. Dmitrievski;T. Dzhatdoev;R. Fini;S. Furuya;G. Galati;V. Gentile;S. Gorbunov;Y. Gornushkin;A. Guler;H. Ichiki;Ç. Kamışcıoğlu;M. Kamiscioglu;T. Katsuragawa;M. Kimura;N. Konovalova;K. Kuge;A. Lauria;P. Loverre;S. Machii;A. Managadze;P. Monacelli;M. Montesi;T. Naka;M. Nakamura;T. Nakano;A. Pastore;D. Podgrudkov;N. Polukhina;F. Pupilli;T. Roganova;G. Rosa;O. Sato;T. Shchedrina;S. Simone;C. Sirignano;A. Sotnikov;N. Starkov;P. Strolin;Y. Tawara;V. Tioukov;A. Umemoto;Max Vladymyrov;M. Yoshimoto;S. Zemskova
如今，有令人信服的证据证明宇宙中存在暗物质。大家普遍认为，需要一个方向灵敏的探测器，以补充的办法确认在常规搜索中发现的候选者，并最终将它们的灵敏度扩大到中微子引起的本底的限度之外。我们建议使用基于核乳剂的探测器来测量WIMP诱导的核反冲的方向。建立了纳米颗粒核乳胶膜的制备方法。几个测量活动已经证明了检测这种乳胶膜中低能离子留下的亚微米轨迹的能力。使用全自动光学显微镜的创新分析技术使路径长度达到100纳米的轨迹重建成为可能，并有进一步超过这一限制的良好前景。我们提出的探测器概念预见了使用大量的核乳胶膜，周围环绕着环境放射性的屏蔽，放置在赤道望远镜上，以抵消地球自转的影响，从而使探测器保持在朝着预期的银河系WIMP方向的固定方向。我们报告了一个1公斤质量的先导实验的时间表和成本估计，旨在六年的时间尺度上交付第一个结果。
Nowadays there is compelling evidence for the existence of dark matter in the Universe. A general consensus has been expressed on the need for a directional sensitive detector to confirm, with a complementary approach, the candidates found in conventional searches and to finally extend their sensitivity beyond the limit of neutrino-induced background. We propose here the use of a detector based on nuclear emulsions to measure the direction of WIMP-induced nuclear recoils. The production of nuclear emulsion films with nanometric grains is established. Several measurement campaigns have demonstrated the capability of detecting sub-micrometric tracks left by low energy ions in such emulsion films. Innovative analysis technologies with fully automated optical microscopes have made it possible to achieve the track reconstruction for path lengths down to one hundred nanometers and there are good prospects to further exceed this limit. The detector concept we propose foresees the use of a bulk of nuclear emulsion films surrounded by a shield from environmental radioactivity, to be placed on an equatorial telescope in order to cancel out the effect of the Earth rotation, thus keeping the detector at a fixed orientation toward the expected direction of galactic WIMPs. We report the schedule and cost estimate for a one-kilogram mass pilot experiment, aiming at delivering the first results on the time scale of six years.