MG14 - Talk detail

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Summary: We discuss the problem of detection of low mass Dark Matter candidates with MDM < 10 GeV/c2. We find that that there is no conflict between DAMA-LIBRA and other detectors, because both CDMS and liquid Xenon Detectors are particularly unconvincing at low mass. We discuss new class of detectors of weakly interacting particles. It will enable reliable detection of low mass, M < 10 GeV/c2 DM-candidates. We will describe why these detectors permit many new “DM-Signatures”, including diurnal modulation detection made possible by directional capabilities of this detector and their low energy threshold (< 0.5 kev). The very large practical application is in the geologic exploration (“Neutrino Geology”). For exampled, it can be used for detection of hydrocarbones in “black shales” through emission of geo-neutrinos, which enables “emission tomography” of upper crust. The another very large application is detection of certain geological structures through their “NEUTRINO SIGNATURE”. For example, the neutrino geology can be used to detect the important, new type of deposits, called Iron Oxide/Cooper/Gold or IOCG deposits. Our new detectors uses coherent scattering (CS) of neutrinos from the target nuclei. The cross-section scales quadratically with the number of neutrons of the target-nucleus. For neutrinos with E &#61627; 3 MeV and nuclei with A &#61627; 150, nuclear recoil energies are E &#61627;&#61472;&#61488;&#61486;1 keV. It combines room-temperature (RT) bolometers made of nano-grains of explosives with advanced acoustic and “complementary” read-outs. The sub-keV amounts of energy deposited by CS of neutrino triggers a ‘nano-explosion’, which makes a “sonic boom” and release certain nano-objects. These, can be collected and measured using appropriate super-sensitive techniques. Depending on the type of such nano-objects, the biological, optical or magnetic read-out can be implemented. This leads to a coincident, time delayed type of read-out with extremely low noise, i.e. events which happens once a day can be observed in large detectors, say one ton detectors. We recently designed elegant read-out for this class of detectors. We will disclose the new results on read-out of such detectors. We currently developed the electronic read-out for 1 kg class detector, and scaling to 1 ton detector seems relatively straightforward and low cost. We expect that deployment for DM will be possible in late 2019 and for “neutrino geology “ in late 2010.

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