K. Bokeloh - The XENON Collaboration

K. Bokeloh
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K. Bokeloh
The XENON Collaboration

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Physics - Instrumentation and Detectors (13)
Instrumentation and Methods for Astrophysics (12)
Cosmology and Nongalactic Astrophysics (9)
High Energy Physics - Experiment (7)
High Energy Physics - Phenomenology (4)
Astrophysics of Galaxies (1)

Publications Authored By K. Bokeloh

Authors: M. Arenz, M. Babutzka, M. Bahr, J. P. Barrett, S. Bauer, M. Beck, A. Beglarian, J. Behrens, T. Bergmann, U. Besserer, J. Blümer, L. I. Bodine, K. Bokeloh, J. Bonn, B. Bornschein, L. Bornschein, S. Büsch, T. H. Burritt, S. Chilingaryan, T. J. Corona, L. De Viveiros, P. J. Doe, O. Dragoun, G. Drexlin, S. Dyba, S. Ebenhöch, K. Eitel, E. Ellinger, S. Enomoto, M. Erhard, D. Eversheim, M. Fedkevych, A. Felden, S. Fischer, J. A. Formaggio, F. Fränkle, D. Furse, M. Ghilea, W. Gil, F. Glück, A. Gonzalez Urena, S. Görhardt, S. Groh, S. Grohmann, R. Grössle, R. Gumbsheimer, M. Hackenjos, V. Hannen, F. Harms, N. Hauÿmann, F. Heizmann, K. Helbing, W. Herz, S. Hickford, D. Hilk, B. Hillen, T. Höhn, B. Holzapfel, M. Hötzel, M. A. Howe, A. Huber, A. Jansen, N. Kernert, L. Kippenbrock, M. Kleesiek, M. Klein, A. Kopmann, A. Kosmider, A. Kovalík, B. Krasch, M. Kraus, H. Krause, M. Krause, L. Kuckert, B. Kuffner, L. La Cascio, O. Lebeda, B. Leiber, J. Letnev, V. M. Lobashev, A. Lokhov, E. Malcherek, M. Mark, E. L. Martin, S. Mertens, S. Mirz, B. Monreal, K. Müller, M. Neuberger, H. Neumann, S. Niemes, M. Noe, N. S. Oblath, A. Off, H. -W. Ortjohann, A. Osipowicz, E. Otten, D. S. Parno, P. Plischke, A. W. P. Poon, M. Prall, F. Priester, P. C. -O. Ranitzsch, J. Reich, O. Rest, R. G. H. Robertson, M. Röllig, S. Rosendahl, S. Rupp, M. Rysavy, K. Schlösser, M. Schlösser, K. Schönung, M. Schrank, J. Schwarz, W. Seiler, H. Seitz-Moskaliuk, J. Sentkerestiova, A. Skasyrskaya, M. Slezak, A. Spalek, M. Steidl, N. Steinbrink, M. Sturm, M. Suesser, H. H. Telle, T. Thümmler, N. Titov, I. Tkachev, N. Trost, A. Unru, K. Valerius, D. Venos, R. Vianden, S. Vöcking, B. L. Wall, N. Wandkowsky, M. Weber, C. Weinheimer, C. Weiss, S. Welte, J. Wendel, K. L. Wierman, J. F. Wilkerson, D. Winzen, J. Wolf, S. Wüstling, M. Zacher, S. Zadoroghny, M. Zboril

The KATRIN experiment will probe the neutrino mass by measuring the beta-electron energy spectrum near the endpoint of tritium beta-decay. An integral energy analysis will be performed by an electro-static spectrometer (Main Spectrometer), an ultra-high vacuum vessel with a length of 23.2 m, a volume of 1240 m^3, and a complex inner electrode system with about 120000 individual parts. Read More

The KATRIN experiment is going to search for the average mass of the electron antineutrino with a sensitivity of 0.2 eV/c2. It uses a retardation spectrometer of MAC-E filter type to accurately measure the shape of the electron spectrum at the endpoint of tritium beta decay. Read More

The radioactive isomer $^{83\mathrm{m}}$Kr has many properties that make it very useful for various applications. Its low energy decay products, like conversion, shake-off and Auger electrons as well as X- and $\gamma$-rays are used for calibration purposes in neutrino mass experiments and direct dark matter detection experiments. Thanks to the short half-life of 1. Read More

Affiliations: 1The XENON Collaboration, 2The XENON Collaboration, 3The XENON Collaboration, 4The XENON Collaboration, 5The XENON Collaboration, 6The XENON Collaboration, 7The XENON Collaboration, 8The XENON Collaboration, 9The XENON Collaboration, 10The XENON Collaboration, 11The XENON Collaboration, 12The XENON Collaboration, 13The XENON Collaboration, 14The XENON Collaboration, 15The XENON Collaboration, 16The XENON Collaboration, 17The XENON Collaboration, 18The XENON Collaboration, 19The XENON Collaboration, 20The XENON Collaboration, 21The XENON Collaboration, 22The XENON Collaboration, 23The XENON Collaboration, 24The XENON Collaboration, 25The XENON Collaboration, 26The XENON Collaboration, 27The XENON Collaboration, 28The XENON Collaboration, 29The XENON Collaboration, 30The XENON Collaboration, 31The XENON Collaboration, 32The XENON Collaboration, 33The XENON Collaboration, 34The XENON Collaboration, 35The XENON Collaboration, 36The XENON Collaboration, 37The XENON Collaboration, 38The XENON Collaboration, 39The XENON Collaboration, 40The XENON Collaboration, 41The XENON Collaboration, 42The XENON Collaboration, 43The XENON Collaboration, 44The XENON Collaboration, 45The XENON Collaboration, 46The XENON Collaboration, 47The XENON Collaboration, 48The XENON Collaboration, 49The XENON Collaboration, 50The XENON Collaboration, 51The XENON Collaboration, 52The XENON Collaboration, 53The XENON Collaboration, 54The XENON Collaboration, 55The XENON Collaboration, 56The XENON Collaboration, 57The XENON Collaboration, 58The XENON Collaboration, 59The XENON Collaboration, 60The XENON Collaboration, 61The XENON Collaboration, 62The XENON Collaboration, 63The XENON Collaboration, 64The XENON Collaboration, 65The XENON Collaboration, 66The XENON Collaboration, 67The XENON Collaboration, 68The XENON Collaboration, 69The XENON Collaboration, 70The XENON Collaboration, 71The XENON Collaboration, 72The XENON Collaboration, 73The XENON Collaboration, 74The XENON Collaboration, 75The XENON Collaboration, 76The XENON Collaboration, 77The XENON Collaboration, 78The XENON Collaboration, 79The XENON Collaboration, 80The XENON Collaboration, 81The XENON Collaboration, 82The XENON Collaboration, 83The XENON Collaboration, 84The XENON Collaboration, 85The XENON Collaboration, 86The XENON Collaboration, 87The XENON Collaboration, 88The XENON Collaboration, 89The XENON Collaboration, 90The XENON Collaboration, 91The XENON Collaboration

XENON is a dark matter direct detection project, consisting of a time projection chamber (TPC) filled with liquid xenon as detection medium. The construction of the next generation detector, XENON1T, is presently taking place at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It aims at a sensitivity to spin-independent cross sections of $2 \cdot 10^{-47} ~ \mathrm{cm}^{\mathrm{2}}$ for WIMP masses around 50 GeV/c$^{2}$, which requires a background reduction by two orders of magnitude compared to XENON100, the current generation detector. Read More

We present the first results of searches for axions and axion-like-particles with the XENON100 experiment. The axion-electron coupling constant, $g_{Ae}$, has been probed by exploiting the axio-electric effect in liquid xenon. A profile likelihood analysis of 224. Read More

The XENON100 dark matter experiment uses liquid xenon in a time projection chamber (TPC) to measure xenon nuclear recoils resulting from the scattering of dark matter Weakly Interacting Massive Particles (WIMPs). In this paper, we report the observation of single-electron charge signals which are not related to WIMP interactions. These signals, which show the excellent sensitivity of the detector to small charge signals, are explained as being due to the photoionization of impurities in the liquid xenon and of the metal components inside the TPC. Read More

Affiliations: 1XENON Collaboration, 2XENON Collaboration, 3XENON Collaboration, 4XENON Collaboration, 5XENON Collaboration, 6XENON Collaboration, 7XENON Collaboration, 8XENON Collaboration, 9XENON Collaboration, 10XENON Collaboration, 11XENON Collaboration, 12XENON Collaboration, 13XENON Collaboration, 14XENON Collaboration, 15XENON Collaboration, 16XENON Collaboration, 17XENON Collaboration, 18XENON Collaboration, 19XENON Collaboration, 20XENON Collaboration, 21XENON Collaboration, 22XENON Collaboration, 23XENON Collaboration, 24XENON Collaboration, 25XENON Collaboration, 26XENON Collaboration, 27XENON Collaboration, 28XENON Collaboration, 29XENON Collaboration, 30XENON Collaboration, 31XENON Collaboration, 32XENON Collaboration, 33XENON Collaboration, 34XENON Collaboration, 35XENON Collaboration, 36XENON Collaboration, 37XENON Collaboration, 38XENON Collaboration, 39XENON Collaboration, 40XENON Collaboration, 41XENON Collaboration, 42XENON Collaboration, 43XENON Collaboration, 44XENON Collaboration, 45XENON Collaboration, 46XENON Collaboration, 47XENON Collaboration, 48XENON Collaboration, 49XENON Collaboration, 50XENON Collaboration, 51XENON Collaboration, 52XENON Collaboration, 53XENON Collaboration, 54XENON Collaboration, 55XENON Collaboration, 56XENON Collaboration, 57XENON Collaboration, 58XENON Collaboration, 59XENON Collaboration, 60XENON Collaboration, 61XENON Collaboration, 62XENON Collaboration, 63XENON Collaboration, 64XENON Collaboration, 65XENON Collaboration, 66XENON Collaboration, 67XENON Collaboration, 68XENON Collaboration, 69XENON Collaboration, 70XENON Collaboration, 71XENON Collaboration, 72XENON Collaboration, 73XENON Collaboration, 74XENON Collaboration, 75XENON Collaboration, 76XENON Collaboration, 77XENON Collaboration

The XENON100 experiment, installed underground at the Laboratori Nazionali del Gran Sasso (LNGS), aims to directly detect dark matter in the form of Weakly Interacting Massive Particles (WIMPs) via their elastic scattering off xenon nuclei. This paper presents a study on the nuclear recoil background of the experiment, taking into account neutron backgrounds from ($\alpha$,n) and spontaneous fission reactions due to natural radioactivity in the detector and shield materials, as well as muon-induced neutrons. Based on Monte Carlo simulations and using measured radioactive contaminations of all detector components, we predict the nuclear recoil backgrounds for the WIMP search results published by the XENON100 experiment in 2011 and 2012, 0. Read More

Results from the nuclear recoil calibration of the XENON100 dark matter detector installed underground at the Laboratori Nazionali del Gran Sasso (LNGS), Italy are presented. Data from measurements with an external 241AmBe neutron source are compared with a detailed Monte Carlo simulation which is used to extract the energy dependent charge-yield Qy and relative scintillation efficiency Leff. A very good level of absolute spectral matching is achieved in both observable signal channels - scintillation S1 and ionization S2 - along with agreement in the 2-dimensional particle discrimination space. Read More

We present new experimental constraints on the elastic, spin-dependent WIMP-nucleon cross section using recent data from the XENON100 experiment, operated in the Laboratori Nazionali del Gran Sasso in Italy. An analysis of 224.6 live days x 34 kg of exposure acquired during 2011 and 2012 revealed no excess signal due to axial-vector WIMP interactions with 129-Xe and 131-Xe nuclei. Read More

The XENON100 experiment, in operation at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy, was designed to search for evidence of dark matter interactions inside a volume of liquid xenon using a dual-phase time projection chamber. This paper describes the Slow Control System (SCS) of the experiment with emphasis on the distributed architecture as well as on its modular and expandable nature. The system software was designed according to the rules of Object-Oriented Programming and coded in Java, thus promoting code reusability and maximum flexibility during commissioning of the experiment. Read More

In a recent manuscript (arXiv:1208.5046) Peter Sorensen claims that XENON100's upper limits on spin-independent WIMP-nucleon cross sections for WIMP masses below 10 GeV "may be understated by one order of magnitude or more". Having performed a similar, though more detailed analysis prior to the submission of our new result (arXiv:1207. Read More

We report on a search for particle dark matter with the XENON100 experiment, operated at the Laboratori Nazionali del Gran Sasso (LNGS) for 13 months during 2011 and 2012. XENON100 features an ultra-low electromagnetic background of (5.3 \pm 0. Read More

Vacuum ultraviolet light sensitive photomultiplier tubes directly coupled to liquid xenon are being used to efficiently detect the 178 nm scintillation light in a variety of liquid xenon based particle detectors. Good knowledge of the performance of these photomultipliers under cryogenic conditions is needed to properly characterize these detectors. Here, we report on measurements of the quantum efficiency of Hamamatsu R8520 photomultipliers, used in the XENON Dark Matter Experiments. Read More

The XENON100 experiment, situated in the Laboratori Nazionali del Gran Sasso, aims at the direct detection of dark matter in the form of weakly interacting massive particles (WIMPs), based on their interactions with xenon nuclei in an ultra low background dual-phase time projection chamber. This paper describes the general methods developed for the analysis of the XENON100 data. These methods have been used in the 100. Read More

The isomer 83mKr with its half-life of 1.83 h is an ideal calibration source for a liquid noble gas dark matter experiment like the XENON project. However, the risk of contamination of the detector with traces of the much longer lived mother isotop 83Rb (86. Read More

We present results from the direct search for dark matter with the XENON100 detector, installed underground at the Laboratori Nazionali del Gran Sasso of INFN, Italy. XENON100 is a two-phase time projection chamber with a 62 kg liquid xenon target. Interaction vertex reconstruction in three dimensions with millimeter precision allows to select only the innermost 48 kg as ultra-low background fiducial target. Read More

Results of the extensive radioactivity screening campaign to identify materials for the construction of XENON100 are reported. This Dark Matter search experiment is operated underground at Laboratori Nazionali del Gran Sasso (LNGS), Italy. Several ultra sensitive High Purity Germanium detectors (HPGe) have been used for gamma ray spectrometry. Read More

Many experiments that aim at the direct detection of Dark Matter are able to distinguish a dominant background from the expected feeble signals, based on some measured discrimination parameter. We develop a statistical model for such experiments using the Profile Likelihood ratio as a test statistic in a frequentist approach. We take data from calibrations as control measurements for signal and background, and the method allows the inclusion of data from Monte Carlo simulations. Read More

The XENON100 experiment, located at the Laboratori Nazionali del Gran Sasso (LNGS), aims to directly detect dark matter in the form of Weakly Interacting Massive Particles (WIMPs) via their elastic scattering off xenon nuclei. We present a comprehensive study of the predicted electronic recoil background coming from radioactive decays inside the detector and shield materials, and intrinsic contamination. Based on GEANT4 Monte Carlo simulations using a detailed geometry together with the measured radioactivity of all detector components, we predict an electronic recoil background in the WIMP-search energy range (0-100 keV) in the 30 kg fiducial mass of less than 10e-2 events/(kg-day-keV), consistent with the experiment's design goal. Read More

The method of direct neutrino mass determination based on the kinematics of tritium beta decay, which is adopted by the KATRIN experiment, makes use of a large, high-resolution electrostatic spectrometer with magnetic adiabatic collimation. In order to target a sensitivity on the neutrino mass of 0.2 eV/c^2, a detailed understanding of the electromagnetic properties of the electron spectrometer is essential, requiring comprehensive calibration measurements with dedicated electron sources. Read More