First characterization of the ultra-shielded chamber in the low-noise underground laboratory (LSBB) of Rustrel-Pays d'Apt

Waysand, G.; Bloyet, Daniel; Bongiraud, Jean-Paul; Collar, J. I.; Dolabdjian, Christophe; Thiec, Ph. Le

doi:10.1016/s0168-9002(99)01377-7

Cited by 25 publications

(21 citation statements)

References 4 publications

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“…• Waste Isolation Pilot Plant (WIPP) [164] in USA • Laboratoire Souterrainà Bras Bruit (LSBB) [165] in France • Kamioka observatory [162] in Japan…”

Section: Cosmogenic and Radiogenic Neutron Radiationmentioning

confidence: 99%

Dark matter direct-detection experiments

Undagoitia

Rauch

2015

J. Phys. G: Nucl. Part. Phys.

386

319

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Abstract.In the past decades, several detector technologies have been developed with the quest to directly detect dark matter interactions and to test one of the most important unsolved questions in modern physics. The sensitivity of these experiments has improved with a tremendous speed due to a constant development of the detectors and analysis methods, proving uniquely suited devices to solve the dark matter puzzle, as all other discovery strategies can only indirectly infer its existence. Despite the overwhelming evidence for dark matter from cosmological indications at small and large scales, a clear evidence for a particle explaining these observations remains absent. This review summarises the status of direct dark matter searches, focussing on the detector technologies used to directly detect a dark matter particle producing recoil energies in the keV energy scale. The phenomenological signal expectations, main background sources, statistical treatment of data and calibration strategies are discussed.arXiv:1509.08767v2 [physics.ins-det]

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“…• Waste Isolation Pilot Plant (WIPP) [164] in USA • Laboratoire Souterrainà Bras Bruit (LSBB) [165] in France • Kamioka observatory [162] in Japan…”

Section: Cosmogenic and Radiogenic Neutron Radiationmentioning

confidence: 99%

Dark matter direct-detection experiments

Undagoitia

Rauch

2015

J. Phys. G: Nucl. Part. Phys.

386

319

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“…At the deepest point (500 m below the surface), a nonconventional shielded cylindrical capsule is embedded without any μ-metal. The chamber is suspended on massive springs cutting off low frequency ground motions with a residual electromagnetic noise lower than 2 f T/ √ Hz above 10 Hz (Waysand et al 1999;Gaffet et al 2003). To preserve these outstanding conditions, sensitive parts of the experiment including sample, seismic source and sensors, are located within the ultra-shielded chamber.…”

Section: Underground Low Magnetic Noise Laboratorymentioning

confidence: 99%

Evidence of the theoretically predicted seismo-magnetic conversion

Bordes

Jouniaux²,

Garambois

et al. 2008

Geophysical Journal International

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We acknowledge the Geophysical Journal International and the Association/Society and Blackwell Publishing. The definitive version is available at www.wileyinterscience.com. The reference is : Bordes, C., L. Jouniaux, S. Garambois, M. Dietrich, J.-P. Pozzi, and S. Gaffet, Evidence of the theoretically predicted seismo-magnetic conversion, G.J.I., 174, issue 2, 489-504, doi:10.1111/j.1365-246X.2008.03828.xInternational audienceSeismo-electromagnetic phenomena in porous media arise from seismic wave-induced fluid motion in the pore space, which perturbs the equilibrium of the electric double layer. This paper describes with details the original experimental apparatus built within the ultra-shielded chamber of the Low Noise Underground Laboratory of Rustrel (France). We measured seismo-magnetic conversions in moist sand using two induction magnetometers, and a pneumatic seismic source to generate the seismic wave propagation. We ensured to avoid the magnetometer vibrations, which could induce strong disturbances from induction origin. Interpretation of the data is improved by an analytical description of phase velocities for fast (P_f) and slow (P_s) longitudinal modes, transverse mode (S) as well as the extensional mode due to the cylindrical geometry of the sample. The purpose of this paper is to provide elements to measure correctly co seismic seismomagnetic fields and to specify their amplitude. The seismic arrivals recorded in the sample showing a 1200$-1300 m/s velocity have been associated to P and extensional waves. The measured seismo-magnetic arrivals show a velocity of about 800 m/s consistent with the calculated phase velocity of S waves. Therefore we show that the seismo-magnetic field is associated to the transverse part of the propagation, as theoretically predicted by Pride (1994), but never measured up to now. Moreover, the combined experimental and analytical approaches lead us to the conclusion that the measured seismo-magnetic field is probably about 0.35 nT for a 1 m/s2 seismic source acceleration (0.1 g)

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“…At 1500 mwe, the ambient neutron flux is primarily due to the surrounding calcite rock, estimated at well below 4 Â 10 À5 n=cm 2 s [11]. The cavern is shielded from the rock environment by a 30-100 cm thickness of concrete, internally sheathed by a 1 cm thickness of iron.…”

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confidence: 99%

First Results of the Phase II SIMPLE Dark Matter Search

et al. 2010

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We report results of a 14.1 kg d measurement with 15 superheated droplet detectors of total active mass 0.208 kg, comprising the first stage of a 30 kg d Phase II experiment. In combination with the results of the neutron-spin sensitive XENON10 experiment, these results yield a limit of |a(p)|<0.32 for M(W)=50 GeV/c² on the spin-dependent sector of weakly interacting massive particle-nucleus interactions with a 50% reduction in the previously allowed region of the phase space, formerly defined by XENON, KIMS, and PICASSO. In the spin-independent sector, a limit of 2.3×10⁻⁵ pb at M(W)=45 GeV/c² is obtained.

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First characterization of the ultra-shielded chamber in the low-noise underground laboratory (LSBB) of Rustrel-Pays d'Apt

Cited by 25 publications

References 4 publications

Dark matter direct-detection experiments

Dark matter direct-detection experiments

Evidence of the theoretically predicted seismo-magnetic conversion

First Results of the Phase II SIMPLE Dark Matter Search

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