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9 results on '"Creus, W"'

1. Application of the independent component analysis to the iKAGRA data

Author

KAGRA Collaboration, Akutsu, T., Ando, M., Arai, K., Arai, Y., Araki, S., Araya, A., Aritomi, N., Asada, H., Aso, Y., Atsuta, S., Awai, K., Bae, S., Bae, Y., Baiotti, L., Bajpai, R., Barton, M. A., Cannon, K., Capocasa, E., Chan, M., Chen, C., Chen, K., Chen, Y., Chu, H., Chu, Y-K., Craig, K., Creus, W., Doi, K., Eda, K., Eguchi, S., Enomoto, Y., Flaminio, R., Fujii, Y., Fujimoto, M. -K., Fukunaga, M., Fukushima, M., Furuhata, T., Ge, G., Hagiwara, A., Haino, S., Hasegawa, K., Hashino, K., Hayakawa, H., Hayama, K., Himemoto, Y., Hiranuma, Y., Hirata, N., Hirobayashi, S., Hirose, E., Hong, Z., Hsieh, B. H., Huang, G-Z., Huang, P., Huang, Y., Ikenoue, B., Imam, S., Inayoshi, K., Inoue, Y., Ioka, K., Itoh, Y., Izumi, K., Jung, K., Jung, P., Kaji, T., Kajita, T., Kakizaki, M., Kamiizumi, M., Kanbara, S., Kanda, N., Kanemura, S., Kaneyama, M., Kang, G., Kasuya, J., Kataoka, Y., Kawaguchi, K., Kawai, N., Kawamura, S., Kawasaki, T., Kim, C., Kim, J. C., Kim, W. S., Kim, Y. -M., Kimura, N., Kinugawa, T., Kirii, S., Kita, N., Kitaoka, Y., Kitazawa, H., Kojima, Y., Kokeyama, K., Komori, K., Kong, A. K. H., Kotake, K., Kozakai, C., Kozu, R., Kumar, R., Kume, J., Kuo, C., Kuo, H-S., Kuroyanagi, S., Kusayanagi, K., Kwak, K., Lee, H. K., Lee, H. M., Lee, H. W., Lee, R., Leonardi, M., Lin, C., Lin, C-Y., Lin, F-L., Liu, G. C., Liu, Y., Luo, L., Majorana, E., Mano, S., Marchio, M., Matsui, T., Matsushima, F., Michimura, Y., Mio, N., Miyakawa, O., Miyamoto, A., Miyamoto, T., Miyazaki, Y., Miyo, K., Miyoki, S., Morii, W., Morisaki, S., Moriwaki, Y., Morozumi, T., Musha, M., Nagano, K., Nagano, S., Nakamura, K., Nakamura, T., Nakano, H., Nakano, M., Nakao, K., Nakashima, R., Narikawa, T., Naticchioni, L., Negishi, R., Quynh, L. Nguyen, Ni, W. -T., Nishizawa, A., Obuchi, Y., Ochi, T., Ogaki, W., Oh, J. J., Oh, S. H., Ohashi, M., Ohishi, N., Ohkawa, M., Okutomi, K., Oohara, K., Ooi, C. P., Oshino, S., Pan, K., Pang, H., Park, J., Arellano, F. E. Pena, Pinto, I., Sago, N., Saijo, M., Saito, S., Saito, Y., Sakai, K., Sakai, Y., Sakuno, Y., Sasaki, M., Sasaki, Y., Sato, S., Sato, T., Sawada, T., Sekiguchi, T., Sekiguchi, Y., Seto, N., Shibagaki, S., Shibata, M., Shimizu, R., Shimoda, T., Shimode, K., Shinkai, H., Shishido, T., Shoda, A., Somiya, K., Son, E. J., Sotani, H., Suemasa, A., Sugimoto, R., Suzuki, T., Tagoshi, H., Takahashi, H., Takahashi, R., Takamori, A., Takano, S., Takeda, H., Takeda, M., Tanaka, H., Tanaka, K., Tanaka, T., Tanioka, S., Martin, E. N. Tapia San, Tatsumi, D., Telada, S., Tomaru, T., Tomigami, Y., Tomura, T., Travasso, F., Trozzo, L., Tsang, T., Tsubono, K., Tsuchida, S., Tsuzuki, T., Tuyenbayev, D., Uchikata, N., Uchiyama, T., Ueda, A., Uehara, T., Ueki, S., Ueno, K., Ueshima, G., Uraguchi, F., Ushiba, T., van Putten, M. H. P. M., Vocca, H., Wada, S., Wakamatsu, T., Wang, J., Wu, C., Wu, H., Wu, S., Xu, W-R., Yamada, T., Yamamoto, A., Yamamoto, K., Yamamoto, S., Yamamoto, T., Yokogawa, K., Yokoyama, J., Yokozawa, T., Yoon, T. H., Yoshioka, T., Yuzurihara, H., Zeidler, S., Zhao, Y., and Zhu, Z. -H.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract

We apply the independent component analysis (ICA) to the real data from a gravitational wave detector for the first time. Specifically we use the iKAGRA data taken in April 2016, and calculate the correlations between the gravitational wave strain channel and 35 physical environmental channels. Using a couple of seismic channels which are found to be strongly correlated with the strain, we perform ICA. Injecting a sinusoidal continuous signal in the strain channel, we find that ICA recovers correct parameters with enhanced signal-to-noise ratio, which demonstrates usefulness of this method. Among the two implementations of ICA used here, we find the correlation method yields the optimal result for the case environmental noises act on the strain channel linearly., Comment: 27 pages, 12 figures : published in PTEP with added discussion about the relation between ICA and Wiener filtering

Published
2019
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2. First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA

Author

KAGRA Collaboration, Akutsu, T., Ando, M., Arai, K., Arai, Y., Araki, S., Araya, A., Aritomi, N., Asada, H., Aso, Y., Atsuta, S., Awai, K., Bae, S., Baiotti, L., Barton, M. A., Cannon, K., Capocasa, E., Chen, C-S., Chiu, T-W., Cho, K., Chu, Y-K., Craig, K., Creus, W., Doi, K., Eda, K., Enomoto, Y., Flaminio, R., Fujii, Y., Fujimoto, M. -K., Fukunaga, M., Fukushima, M., Furuhata, T., Hagiwara, A., Haino, S., Hasegawa, K., Hashino, K., Hayama, K., Hirobayashi, S., Hirose, E., Hsieh, B. H., Huang, C-Z., Ikenoue, B., Inoue, Y., Ioka, K., Itoh, Y., Izumi, K., Kaji, T., Kajita, T., Kakizaki, M., Kamiizumi, M., Kanbara, S., Kanda, N., Kanemura, S., Kaneyama, M., Kang, G., Kasuya, J., Kataoka, Y., Kawai, N., Kawamura, S., Kawasaki, T., Kim, C., Kim, J., Kim, J. C., Kim, W. S., Kim, Y. -M., Kimura, N., Kinugawa, T., Kirii, S., Kitaoka, Y., Kitazawa, H., Kojima, Y., Kokeyama, K., Komori, K., Kong, A. K. H., Kotake, K., Kozu, R., Kumar, R., Kuo, H-S., Kuroyanagi, S., Lee, H. K., Lee, H. M., Lee, H. W., Leonardi, M., Lin, C-Y., Lin, F-L., Liu, G. C., Liu, Y., Majorana, E., Mano, S., Marchio, M., Matsui, T., Matsushima, F., Michimura, Y., Mio, N., Miyakawa, O., Miyamoto, A., Miyamoto, T., Miyo, K., Miyoki, S., Morii, W., Morisaki, S., Moriwaki, Y., Morozumi, T., Murakami, I., Musha, M., Nagano, K., Nagano, S., Nakamura, K., Nakamura, T., Nakano, H., Nakano, M., Nakao, K., Namai, Y., Narikawa, T., Naticchioni, L., Quynh, L. Nguyen, Ni, W. -T., Nishizawa, A., Obuchi, Y., Ochi, T., Oh, J. J., Oh, S. H., Ohashi, M., Ohishi, N., Ohkawa, M., Okutomi, K., Ono, K., Oohara, K., Ooi, C. P., Pan, S-S., Park, J., Arellano, F. E. Peña, Pinto, I., Sago, N., Saijo, M., Saito, Y., Saitou, S., Sakai, K., Sakai, Y., Sasai, M., Sasaki, M., Sasaki, Y., Sato, N., Sato, S., Sato, T., Sekiguchi, Y., Seto, N., Shibata, M., Shimoda, T., Shinkai, H., Shishido, T., Shoda, A., Somiya, K., Son, E. J., Suemasa, A., Suzuki, T., Tagoshi, H., Tahara, H., Takahashi, H., Takahashi, R., Takamori, A., Takeda, H., Tanaka, H., Tanaka, K., Tanaka, T., Tanioka, S., Martin, E. N. Tapia San, Tatsumi, D., Terashima, S., Tomaru, T., Tomura, T., Travasso, F., Tsubono, K., Tsuchida, S., Uchikata, N., Uchiyama, T., Ueda, A., Uehara, T., Ueki, S., Ueno, K., Uraguchi, F., Ushiba, T., van Putten, M. H. P. M., Vocca, H., Wada, S., Wakamatsu, T., Watanabe, Y., Xu, W-R., Yamada, T., Yamamoto, A., Yamamoto, K., Yamamoto, S., Yamamoto, T., Yokogawa, K., Yokoyama, J., Yokozawa, T., Yoon, T. H., Yoshioka, T., Yuzurihara, H., Zeidler, S., and Zhu, Z. -H.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology, Physics - Instrumentation and Detectors
Abstract

KAGRA is a second-generation interferometric gravitational-wave detector with 3-km arms constructed at Kamioka, Gifu in Japan. It is now in its final installation phase, which we call bKAGRA (baseline KAGRA), with scientific observations expected to begin in late 2019. One of the advantages of KAGRA is its underground location of at least 200 m below the ground surface, which brings small seismic motion at low frequencies and high stability of the detector. Another advantage is that it cools down the sapphire test mass mirrors to cryogenic temperatures to reduce thermal noise. In April-May 2018, we have operated a 3-km Michelson interferometer with a cryogenic test mass for 10 days, which was the first time that km-scale interferometer was operated at cryogenic temperatures. In this article, we report the results of this "bKAGRA Phase 1" operation. We have demonstrated the feasibility of 3-km interferometer alignment and control with cryogenic mirrors., Comment: 23 pages, 11 figures

Published
2019
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3. KAGRA: 2.5 Generation Interferometric Gravitational Wave Detector

Author

Akutsu, T., Ando, M., Arai, K., Arai, Y., Araki, S., Araya, A., Aritomi, N., Asada, H., Aso, Y., Atsuta, S., Awai, K., Bae, S., Baiotti, L., Barton, M. A., Cannon, K., Capocasa, E., Chen, C-S., Chiu, T-W., Cho, K., Chu, Y-K., Craig, K., Creus, W., Doi, K., Eda, K., Enomoto, Y., Flaminio, R., Fujii, Y., Fujimoto, M. -K., Fukunaga, M., Fukushima, M., Furuhata, T., Haino, S., Hasegawa, K., Hashino, K., Hayama, K., Hirobayashi, S., Hirose, E., Hsieh, B. H., Huang, C-Z., Ikenoue, B., Inoue, Y., Ioka, K., Itoh, Y., Izumi, K., Kaji, T., Kajita, T., Kakizaki, M., Kamiizumi, M., Kanbara, S., Kanda, N., Kanemura, S., Kaneyama, M., Kang, G., Kasuya, J., Kataoka, Y., Kawai, N., Kawamura, S., Kawasaki, T., Kim, C., Kim, J., Kim, J. C., Kim, W. S., Kim, Y. -M., Kimura, N., Kinugawa, T., Kirii, S., Kitaoka, Y., Kitazawa, H., Kojima, Y., Kokeyama, K., Komori, K., Kong, A. K. H., Kotake, K., Kozu, R., Kumar, R., Kuo, H-S., Kuroyanagi, S., Lee, H. K., Lee, H. M., Lee, H. W., Leonardi, M., Lin, C-Y., Lin, F-L., Liu, G. C., Liu, Y., Majorana, E., Mano, S., Marchio, M., Matsui, T., Matsushima, F., Michimura, Y., Mio, N., Miyakawa, O., Miyamoto, A., Miyamoto, T., Miyo, K., Miyoki, S., Morii, W., Morisaki, S., Moriwaki, Y., Morozumi, T., Musha, M., Nagano, K., Nagano, S., Nakamura, K., Nakamura, T., Nakano, H., Nakano, M., Nakao, K., Narikawa, T., Naticchioni, L., Quynh, L. Nguyen, Ni, W. -T., Nishizawa, A., Ochi, T., Oh, J. J., Oh, S. H., Ohashi, M., Ohishi, N., Ohkawa, M., Okutomi, K., Ono, K., Oohara, K., Ooi, C. P., Pan, S-S., Park, J., Arellano, F. E. Peña, Pinto, I., Sago, N., Saijo, M., Saito, Y., Sakai, K., Sakai, Y., Sasai, M., Sasaki, M., Sasaki, Y., Sato, S., Sato, T., Sekiguchi, Y., Seto, N., Shibata, M., Shimoda, T., Shinkai, H., Shishido, T., Shoda, A., Somiya, K., Son, E. J., Suemasa, A., Suzuki, T., Tagoshi, H., Tahara, H., Takahashi, H., Takahashi, R., Takamori, A., Takeda, H., Tanaka, H., Tanaka, K., Tanaka, T., Tanioka, S., Martin, E. N. Tapia San, Tatsumi, D., Tomaru, T., Tomura, T., Travasso, F., Tsubono, K., Tsuchida, S., Uchikata, N., Uchiyama, T., Uehara, T., Ueki, S., Ueno, K., Ushiba, T., van Putten, M. H. P. M., Vocca, H., Wada, S., Wakamatsu, T., Watanabe, Y., Xu, W-R., Yamada, T., Yamamoto, A., Yamamoto, K., Yamamoto, S., Yamamoto, T., Yokogawa, K., Yokoyama, J., Yokozawa, T., Yoon, T. H., Yoshioka, T., Yuzurihara, H., Zeidler, S., and Zhu, Z. -H.

Subjects
General Relativity and Quantum Cosmology, Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

The recent detections of gravitational waves (GWs) reported by LIGO/Virgo collaborations have made significant impact on physics and astronomy. A global network of GW detectors will play a key role to solve the unknown nature of the sources in coordinated observations with astronomical telescopes and detectors. Here we introduce KAGRA (former name LCGT; Large-scale Cryogenic Gravitational wave Telescope), a new GW detector with two 3-km baseline arms arranged in the shape of an "L", located inside the Mt. Ikenoyama, Kamioka, Gifu, Japan. KAGRA's design is similar to those of the second generations such as Advanced LIGO/Virgo, but it will be operating at the cryogenic temperature with sapphire mirrors. This low temperature feature is advantageous for improving the sensitivity around 100 Hz and is considered as an important feature for the third generation GW detector concept (e.g. Einstein Telescope of Europe or Cosmic Explorer of USA). Hence, KAGRA is often called as a 2.5 generation GW detector based on laser interferometry. The installation and commissioning of KAGRA is underway and its cryogenic systems have been successfully tested in May, 2018. KAGRA's first observation run is scheduled in late 2019, aiming to join the third observation run (O3) of the advanced LIGO/Virgo network. In this work, we describe a brief history of KAGRA and highlights of main feature. We also discuss the prospects of GW observation with KAGRA in the era of O3. When operating along with the existing GW detectors, KAGRA will be helpful to locate a GW source more accurately and to determine the source parameters with higher precision, providing information for follow-up observations of a GW trigger candidate., Comment: 6 pages, 3 figures (quality of some figures has been reduced)

Published
2018
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4. The status of KAGRA underground cryogenic gravitational wave telescope

Author

KAGRA Collaboration, Akutsu, T., Ando, M., Araya, A., Aritomi, N., Asada, H., Aso, Y., Atsuta, S., Awai, K., Barton, M. A., Cannon, K., Craig, K., Creus, W., Doi, K., Eda, K., Enomoto, Y., Flaminio, R., Fujii, Y., Fujimoto, M. -K., Furuhata, T., Haino, S., Hasegawa, K., Hashino, K., Hayama, K., Hirobayashi, S., Hirose, E., Hsieh, B. H., Inoue, Y., Ioka, K., Itoh, Y., Kaji, T., Kajita, T., Kakizaki, M., Kamiizumi, M., Kambara, S., Kanda, N., Kanemura, S., Kaneyama, M., Kang, G., Kasuya, J., Kataoka, Y., Kawai, N., Kawamura, S., Kim, C., Kim, H., Kim, J., Kim, Y., Kimura, N., Kinugawa, T., Kirii, S., Kitaoka, Y., Kojima, Y., Kokeyama, K., Komori, K., Kotake, K., Kumar, R., Lee, H., Liu, Y., Luca, N., Majorana, E., Mano, S., Marchio, M., Matsui, T., Matsushima, F., Michimura, Y., Miyakawa, O., Miyamoto, T., Miyamoto, A., Miyo, K., Miyoki, S., Morii, W., Morisaki, S., Moriwaki, Y., Morozumi, T., Musha, M., Nagano, S., Nagano, K., Nakamura, K., Nakamura, T., Nakano, H., Nakano, M., Nakao, K., Narikawa, T., Quynh, L. Nguyen, Ni, W. -T., Ochi, T., Oh, J., Oh, S., Ohashi, M., Ohishi, N., Ohkawa, M., Okutomi, K., Oohara, K., Alleano, F. E. Peña, Pinto, I., Sago, N., Saijo, M., Saito, Y., Sakai, K., Sakai, Y., Sasaki, Y., Sasaki, M., Sato, S., Sato, T., Sekiguchi, Y., Seto, N., Shibata, M., Shimoda, T., Shinkai, H., Shoda, A., Somiya, K., Son, E., Suemasa, A., Suzuki, T., Tagoshi, H., Takahashi, H., Takahashi, R., Takamori, A., Takeda, H., Tanaka, H., Tanaka, K., Tanaka, T., Tatsumi, D., Tomaru, T., Tomura, T., Travasso, F., Tsubono, K., Tsuchida, S., Uchikata, N., Uchiyama, T., Uehara, T., Ueki, S., Ueno, K., Ushiba, T., van Putten, M. H. P. M., Vocca, H., Wada, S., Wakamatsu, T., Yamada, T., Yamamoto, S., Yamamoto, T., Yamamoto, K., Yamamoto, A., Yokoyama, J., Yokozawa, T., Yoon, T. H., Yuzurihara, H., Zeidler, S., and Zhu, Z. -H.

Subjects
General Relativity and Quantum Cosmology, Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

KAGRA is a 3-km interferometric gravitational wave telescope located in the Kamioka mine in Japan. It is the first km-class gravitational wave telescope constructed underground to reduce seismic noise, and the first km-class telescope to use cryogenic cooling of test masses to reduce thermal noise. The construction of the infrastructure to house the interferometer in the tunnel, and the initial phase operation of the interferometer with a simple 3-km Michelson configuration have been completed. The first cryogenic operation is expected in 2018, and the observing runs with a full interferometer are expected in 2020s. The basic interferometer configuration and the current status of KAGRA are described., Comment: 7 pages, 2 figures. Proceedings for XV International Conference on Topics in Astroparticle and Underground Physics (TAUP2017), Sudbury, July 24-28, 2017

Published
2017
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5. Scintillation efficiency of liquid argon in low energy neutron-argon scattering

Author

Creus, W., Allkofer, Y., Amsler, C., Ferella, A. D., Rochet, J., Scotto-Lavina, L., and Walter, M.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Phenomenology
Abstract

Experiments searching for weak interacting massive particles with noble gases such as liquid argon require very low detection thresholds for nuclear recoils. A determination of the scintillation efficiency is crucial to quantify the response of the detector at low energy. We report the results obtained with a small liquid argon cell using a monoenergetic neutron beam produced by a deuterium-deuterium fusion source. The light yield relative to electrons was measured for six argon recoil energies between 11 and 120 keV at zero electric drift field., Comment: 21 pages, 19 figures, 4 tables

Published
2015
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6. Study of nuclear recoils in liquid argon with monoenergetic neutrons

Author

Regenfus, C., Allkofer, Y., Amsler, C., Creus, W., Ferella, A., Rochet, J., and Walter, M.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

For the development of liquid argon dark matter detectors we assembled a setup in the laboratory to scatter neutrons on a small liquid argon target. The neutrons are produced mono-energetically (E_kin=2.45 MeV) by nuclear fusion in a deuterium plasma and are collimated onto a 3" liquid argon cell operating in single-phase mode (zero electric field). Organic liquid scintillators are used to tag scattered neutrons and to provide a time-of-flight measurement. The setup is designed to study light pulse shapes and scintillation yields from nuclear and electronic recoils as well as from {\alpha}-particles at working points relevant to dark matter searches. Liquid argon offers the possibility to scrutinise scintillation yields in noble liquids with respect to the populations of the two fundamental excimer states. Here we present experimental methods and first results from recent data towards such studies., Comment: 9 pages, 8 figures, proceedings of TAUP 2011, to be published in Journal of Physics: Conference Series (JCPS)

Published
2012
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7. ArDM: a ton-scale LAr detector for direct Dark Matter searches

Author

ArDM Collaboration, Marchionni, A., Amsler, C., Badertscher, A., Boccone, V., Bueno, A., Carmona-Benitez, M. C., Coleman, J., Creus, W., Curioni, A., Daniel, M., Dawe, E. J., Degunda, U., Gendotti, A., Epprecht, L., Horikawa, S., Kaufmann, L., Knecht, L., Laffranchi, M., Lazzaro, C., Lightfoot, P. K., Lussi, D., Lozano, J., Mavrokoridis, K., Melgarejo, A., Mijakowski, P., Natterer, G., Navas-Concha, S., Otyugova, P., de Prado, M., Przewlocki, P., Regenfus, C., Resnati, F., Robinson, M., Rochet, J., Romero, L., Rondio, E., Rubbia, A., Scotto-Lavina, L., Spooner, N. J. C., Strauss, T., Touramanis, C., Ulbricht, J., and Viant, T.

Subjects
Physics - Instrumentation and Detectors
Abstract

The Argon Dark Matter (ArDM-1t) experiment is a ton-scale liquid argon (LAr) double-phase time projection chamber designed for direct Dark Matter searches. Such a device allows to explore the low energy frontier in LAr with a charge imaging detector. The ionization charge is extracted from the liquid into the gas phase and there amplified by the use of a Large Electron Multiplier in order to reduce the detection threshold. Direct detection of the ionization charge with fine spatial granularity, combined with a measurement of the amplitude and time evolution of the associated primary scintillation light, provide powerful tools for the identification of WIMP interactions against the background due to electrons, photons and possibly neutrons if scattering more than once. A one ton LAr detector is presently installed on surface at CERN to fully test all functionalities and it will be soon moved to an underground location. We will emphasize here the lessons learned from such a device for the design of a large LAr TPC for neutrino oscillation, proton decay and astrophysical neutrinos searches., Comment: To appear in Proceedings 1st International Workshop towards the Giant Liquid Argon Charge Imaging Experiment (GLA2010), Tsukuba, March 2010

Published
2010
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8. First results on light readout from the 1-ton ArDM liquid argon detector for dark matter searches

Author

Amsler, C., Badertscher, A., Boccone, V., Bueno, A., Carmona-Benitez, M. C., Creus, W., Curioni, A., Daniel, M., Dawe, E. J., Degunda, U., Gendotti, A., Epprecht, L., Horikawa, S., Kaufmann, L., Knecht, L., Laffranchi, M., Lazzaro, C., Lightfoot, P. K., Lussi, D., Lozano, J., Marchionni, A., Mavrokoridis, K., Melgarejo, A., Mijakowski, P., Natterer, G., Navas-Concha, S., Otyugova, P., dePrado, M., Przewlocki, P., Regenfus, C., Resnati, F., Robinson, M., Rochet, J., Romero, L., Rondio, E., Rubbia, A., Scotto-Lavina, L., Spooner, N. J. C., Strauss, T., Ulbricht, J., and Viant, T.

Subjects
Physics - Instrumentation and Detectors
Abstract

ArDM-1t is the prototype for a next generation WIMP detector measuring both the scintillation light and the ionization charge from nuclear recoils in a 1-ton liquid argon target. The goal is to reach a minimum recoil energy of 30\,keVr to detect recoiling nuclei. In this paper we describe the experimental concept and present results on the light detection system, tested for the first time in ArDM on the surface at CERN. With a preliminary and incomplete set of PMTs, the light yield at zero electric field is found to be between 0.3-0.5 phe/keVee depending on the position within the detector volume, confirming our expectations based on smaller detector setups., Comment: 14 pages, 10 figures, v2 accepted for publication in JINST

Published
2010
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9. The ArDM experiment

Author

ArDM Collaboration, Amsler, C., Badertscher, A., Boccone, V., Bourgeois, N., Bueno, A., Carmona-Benitez, M. C., Chorowski, M., Creus, W., Curioni, A., Daw, E., Degunda, U., Dell'Antone, A., Droge, M., Epprecht, L., Haller, C., Haranczyk, M., Horikawa, S., Kaufmann, L., Kisiel, J., Knecht, L., Laffranchi, M., Lagoda, J., Lazzaro, C., Lightfoot, P., Lozano, J., Lussi, D., Maire, G., Mania, S., Marchionni, A., Mavrokoridis, K., Melgarejo, A., Mijakowski, P., Natterer, G., Navas-Concha, S., Otiougova, P., Piotrowska, A., Polinski, J., de Prado, M., Przewlocki, P., Ravat, S., Regenfus, C., Resnati, F., Robinson, M., Rochet, J., Romero, L., Rondio, E., Rubbia, A., Scotto-Lavina, L., Spooner, N., Viant, T., Trawinski, A., Ulbricht, J., and Zalewska, A.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

The aim of the ArDM project is the development and operation of a one ton double-phase liquid argon detector for direct Dark Matter searches. The detector measures both the scintillation light and the ionization charge from ionizing radiation using two independent readout systems. This paper briefly describes the detector concept and presents preliminary results from the ArDM R&D program, including a 3 l prototype developed to test the charge readout system., Comment: Proceedings of the Epiphany 2010 Conference, to be published in Acta Physica Polonica B

Published
2010

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