5
5.0
Jun 30, 2018
06/18
by
W. Xu; N. Abgrall; E. Aguayo; F. T. Avignone; A. S. Barabash; F. E. Bertrand; M. Boswell; V. Brudanin; M. Busch; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; D. C. Combs; C. Cuesta; J. A. Detwiler; P. J. Doe; Yu. Efremenko; V. Egorov; H. Ejiri; S. R. Elliott; J. E. Fast; P. Finnerty; F. M. Fraenkle; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; V. E. Guiseppe; K. Gusev; A. L. Hallin; R. Hazama; A. Hegai; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe;...
texts
eye 5
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High purity germanium (HPGe) crystals will be used for the MAJORANA DEMONSTRATOR, where they serve as both the source and the detector for neutrinoless double beta decay. It is crucial for the experiment to understand the performance of the HPGe crystals. A variety of crystal properties are being investigated, including basic properties such as energy resolution, efficiency, uniformity, capacitance, leakage current and crystal axis orientation, as well as more sophisticated properties, e.g....
Topics: Physics, Nuclear Experiment, Instrumentation and Detectors
Source: http://arxiv.org/abs/1404.7399
25
25
Jun 26, 2018
06/18
by
The Majorana Collaboration; N. Abgrall; E. Aguayo; F. T. Avignone; A. S. Barabash; F. E. Bertrand; V. Brudanin; M. Busch; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; D. C. Combs; C. Cuesta; J. A. Detwiler; P. J. Doe; Yu. Efremenko; V. Egorov; H. Ejiri; S. R. Elliott; J. Esterline; J. E. Fast; P. Finnerty; F. M. Fraenkle; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; V. E. Guiseppe; K. Gusev; A. L. Hallin; R. Hazama; A. Hegai; R. Henning; E. W. Hoppe;...
texts
eye 25
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The Majorana Demonstrator is an ultra-low background physics experiment searching for the neutrinoless double beta decay of $^{76}$Ge. The Majorana Parts Tracking Database is used to record the history of components used in the construction of the Demonstrator. The tracking implementation takes a novel approach based on the schema-free database technology CouchDB. Transportation, storage, and processes undergone by parts such as machining or cleaning are linked to part records. Tracking parts...
Topics: Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1502.01748
6
6.0
Jun 29, 2018
06/18
by
T. Lasserre; K. Altenmueller; M. Cribier; A. Merle; S. Mertens; M. Vivier
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eye 6
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We investigate a new method to search for keV-scale sterile neutrinos that could account for Dark Matter. Neutrinos trapped in our galaxy could be captured on stable $^{163}$Dy if their mass is greater than 2.83 keV. Two experimental realizations are studied, an integral counting of $^{163}$Ho atoms in dysprosium-rich ores and a real-time measurement of the emerging electron spectrum in a dysprosium-based detector. The capture rates are compared to the solar neutrino and radioactive...
Topics: Astrophysics, High Energy Physics - Phenomenology, Cosmology and Nongalactic Astrophysics, High...
Source: http://arxiv.org/abs/1609.04671
3
3.0
Jun 30, 2018
06/18
by
T. Devolder; S. Couet; J. Swerts; E. Liu; T. Lin; S. Mertens; G. Kar; A. Furnemont
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eye 3
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We study the annealing stability of bottom-pinned perpendicularly magnetized magnetic tunnel junctions based on dual MgO free layers and thin fixed systems comprising a hard [Co/Ni] multilayer antiferromagnetically coupled to thin a Co reference layer and a FeCoB polarizing layer. Using conventional magnetometry and advanced broadband ferromagnetic resonance, we identify the properties of each sub-unit of the magnetic tunnel junction and demonstrate that this material option can ensure a...
Topics: Materials Science, Condensed Matter
Source: http://arxiv.org/abs/1703.07154
3
3.0
Jun 29, 2018
06/18
by
T. Devolder; E. Liu; J. Swerts; S. Couet; T. Lin; S. Mertens; A. Furnemont; G. Kar; J. De Boeck
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eye 3
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We study the properties of composite free layers with perpendicular anisotropy. The free layers are made of a soft FeCoB layer ferromagnetically coupled by a variable spacer (Ta, W, Mo) to a very anisotropic [Co/Ni] multilayer embodied in a magnetic tunnel junction meant for spin torque memory applications. For this we use broadband ferromagnetic resonance to follow the field dependence of the acoustical and optical excitation of the composite free layer in both in-plane and out-of-plane...
Topics: Materials Science, Condensed Matter
Source: http://arxiv.org/abs/1609.07863
6
6.0
Jun 29, 2018
06/18
by
S. R. Elliott; N. Abgrall; I. J. Arnquist; F. T. Avignone; A. S. Barabash; F. E. Bertrand; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; T. S. Caldwell; Y-D. Chan; C. D. Christofferson; P. -H. Chu; C. Cuesta; J. A. Detwiler; C. Dunagan; Yu. Efremenko; H. Ejiri; A. Fullmer; A. Galindo-Uribarri; T. Gilliss; G. K. Giovanetti; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; J. Leon;...
texts
eye 6
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Neutrinoless double-beta decay searches seek to determine the nature of neutrinos, the existence of a lepton violating process, and the effective Majorana neutrino mass. The {\sc Majorana} Collaboration is assembling an array of high purity Ge detectors to search for neutrinoless double-beta decay in $^{76}$Ge. The {\sc Majorana Demonstrator} is composed of 44.8~kg (29.7 kg enriched in $^{76}$Ge) of Ge detectors in total, split between two modules contained in a low background shield at the...
Topics: Instrumentation and Detectors, Nuclear Experiment, Physics, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1610.01210
7
7.0
Jun 30, 2018
06/18
by
S. Mertens; T. Lasserre; S. Groh; F. Glueck; A. Huber; A. W. P. Poon; M. Steidl; N. Steinbrink; C. Weinheimer
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eye 7
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We investigate the sensitivity of tritium $\beta$-decay experiments for keV-scale sterile neutrinos. Relic sterile neutrinos in the keV mass range can contribute both to the cold and warm dark matter content of the universe. This work shows that a large-scale tritium beta-decay experiment, similar to the KATRIN experiment that is under construction, can reach a statistical sensitivity of the active-sterile neutrino mixing of $\sin^2\theta \sim 10^{-8}$. The effect of uncertainties in the known...
Topics: Physics, Astrophysics, Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment,...
Source: http://arxiv.org/abs/1409.0920
14
14
Jun 26, 2018
06/18
by
S. Mertens; N. Abgrall; F. T. Avignone; A. S. Barabash; F. E. Bertrand; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; C. Cuesta; J. A. Detwiler; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; B. D. LaFerriere; J. Leon; J. MacMullin; R. D....
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eye 14
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The goal of the \textsc{Majorana} \textsc{Demonstrator} project is to search for 0$\nu\beta\beta$ decay in $^{76}\mathrm{Ge}$. Of all candidate isotopes for 0$\nu\beta\beta$, $^{76}\mathrm{Ge}$ has some of the most favorable characteristics. Germanium detectors are a well established technology, and in searches for 0$\nu\beta\beta$, the high purity germanium crystal acts simultaneously as source and detector. Furthermore, p-type germanium detectors provide excellent energy resolution and a...
Topics: Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1502.01742
4
4.0
Jun 30, 2018
06/18
by
S. Mertens; K. Dolde; M. Korzeczek; F. Glueck; S. Groh; R. D. Martin; A. W. P. Poon; M. Steidl
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eye 4
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Sterile neutrinos in the mass range of a few keV are candidates for both cold and warm dark matter. An ad-mixture of a heavy neutrino mass eigenstate to the electron neutrino would result in a minuscule distortion - a 'kink' - in a $\beta$-decay spectrum. In this paper we show that a wavelet transform is a very powerful shape analysis method to detect this signature. For a tritium source strength, similar to what is expected from the KATRIN experiment, a statistical sensitivity to...
Topics: High Energy Physics - Experiment, High Energy Physics - Phenomenology, Astrophysics, Cosmology and...
Source: http://arxiv.org/abs/1410.7684
91
91
Sep 21, 2013
09/13
by
S. Mertens; G. Drexlin; F. M. Fraenkle; D. Furse; F. Glueck; S. Goerhardt; M. Hoetzel; W. Kaefer; B. Leiber; T. Thuemmler; N. Wandkowsky; J. Wolf
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eye 91
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The KATRIN experiment is designed to measure the absolute neutrino mass scale with a sensitivity of 200 meV at 90% C.L. by high resolution tritium beta-spectroscopy. A low background level of 10 mHz at the beta-decay endpoint is required in order to achieve the design sensitivity. In this paper we discuss a novel background source arising from magnetically trapped keV electrons in electrostatic retarding spectrometers. The main sources of these electrons are alpha-decays of the radon isotopes...
Source: http://arxiv.org/abs/1204.6213v1
56
56
Sep 23, 2013
09/13
by
S. Mertens; A. Engel
texts
eye 56
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We investigate the VC-dimension of the perceptron and simple two-layer networks like the committee- and the parity-machine with weights restricted to values $\pm1$. For binary inputs, the VC-dimension is determined by atypical pattern sets, i.e. it cannot be found by replica analysis or numerical Monte Carlo sampling. For small systems, exhaustive enumerations yield exact results. For systems that are too large for enumerations, number theoretic arguments give lower bounds for the VC-dimension....
Source: http://arxiv.org/abs/cond-mat/9608156v1
65
65
Sep 20, 2013
09/13
by
S. Mertens; A. Beglarian; L. Bornschein; G. Drexlin; F. M. Fränkle; D. Furse; F. Glück; S. Görhardt; O. Krömer; B. Leiber; K. Schlösser; T. Thümmler; N. Wandkowsky; S. Wüstling
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eye 65
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The primary objective of the KATRIN experiment is to probe the absolute neutrino mass scale with a sensitivity of 200 meV (90% C.L.) by precision spectroscopy of tritium beta-decay. To achieve this, a low background of the order of 10^(-2) cps in the region of the tritium beta-decay endpoint is required. Measurements with an electrostatic retarding spectrometer have revealed that electrons, arising from nuclear decays in the volume of the spectrometer, are stored over long time periods and...
Source: http://arxiv.org/abs/1205.3729v2
46
46
Sep 22, 2013
09/13
by
S. Mertens
texts
eye 46
favorite 0
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The VC dimension of the Ising perceptron with binary patterns is calculated by numerical enumerations for system sizes N
Source: http://arxiv.org/abs/cond-mat/9602107v1
69
69
Sep 18, 2013
09/13
by
S. Mertens
texts
eye 69
favorite 0
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Binary sequences with low autocorrelations are important in communication engineering and in statistical mechanics as groundstates of the Bernasconi-model. Computer searches are the main tool to construct such sequences. Due to the exponential size $O(2^N)$ of the configuration space, exhaustive searches are limited to short sequences. We discuss an exhaustive search algorithm with run time characteristic $O(1.85^N)$ and apply it to compile a table of exact groundstates of the Bernasconi-model...
Source: http://arxiv.org/abs/cond-mat/9605050v2
12
12
Jun 29, 2018
06/18
by
R. Adhikari; M. Agostini; N. Anh Ky; T. Araki; M. Archidiacono; M. Bahr; J. Baur; J. Behrens; F. Bezrukov; P. S. Bhupal Dev; D. Borah; P. S. Rodrigues da Silva; O. Ruchayskiy; N. G. Sanchez; M. Sasaki; N. Saviano; A. Schneider; F. Schneider; T. Schwetz; S. Schönert; S. Scholl; A. Boyarsky; F. Shankar; R. Shrock; N. Steinbrink; L. Strigari; F. Suekane; B. Suerfu; R. Takahashi; N. Thi Hong Van; I. Tkachev; M. Totzauer; A. de Gouvea; Y. Tsai; C. G. Tully; K. Valerius; J. W. F. Valle; D. Venos; M....
texts
eye 12
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We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved - cosmology, astrophysics, nuclear, and particle physics - in each case viewed from both theoretical and experimental/observational perspectives. After reviewing the role of active neutrinos in particle physics, astrophysics, and cosmology, we focus on sterile neutrinos in the context of the Dark Matter puzzle. Here, we first review the physics motivation for...
Topics: Astrophysics, High Energy Physics - Phenomenology, Cosmology and Nongalactic Astrophysics,...
Source: http://arxiv.org/abs/1602.04816
58
58
Jul 20, 2013
07/13
by
N. Wandkowsky; G. Drexlin; F. M. Fränkle; F. Glück; S. Groh; S. Mertens
texts
eye 58
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The Karlsruhe Tritium Neutrino (KATRIN) experiment investigating tritium beta-decay close to the endpoint with unprecedented precision has stringent requirements on the background level of less than 10^(-2) counts per second. Electron emission during the alpha-decay of Rn-219 and Rn-220 atoms in the electrostatic spectrometers of KATRIN is a serious source of background exceeding this limit. In this paper we compare extensive simulations of Rn-induced background to specific measurements with...
Source: http://arxiv.org/abs/1304.1379v1
57
57
Jul 20, 2013
07/13
by
N. Wandkowsky; G. Drexlin; F. M. Fränkle; F. Glück; S. Groh; S. Mertens
texts
eye 57
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Electrostatic spectrometers utilized in high-resolution beta-spectroscopy studies such as in the Karlsruhe Tritium Neutrino (KATRIN) experiment have to operate with a background level of less than 10^(-2) counts per second. This limit can be exceeded by even a small number of Rn-219 or Rn-220 atoms being emanated into the volume and undergoing alpha-decay there. In this paper we present a detailed model of the underlying background-generating processes via electron emission by internal...
Source: http://arxiv.org/abs/1304.1375v1
4
4.0
Jun 29, 2018
06/18
by
N. Abgrall; I. J. Arnquist; F. T. Avignone; H. O. Back; A. S. Barabash; F. E. Bertrand; M. Boswell; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; P. -H. Chu; C. Cuesta; J. A. Detwiler; J. A. Dunmore; Yu. Efremenko; H. Ejiri; S. R. Elliott; P. Finnerty; A. Galindo-Uribarri; V. M. Gehman; T. Gilliss; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R....
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eye 4
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The MAJORANA collaboration is constructing the MAJORANA DEMONSTATOR at the Sanford Underground Research Facility at the Homestake gold mine, in Lead, SD. The apparatus will use Ge detectors, enriched in isotope \nuc{76}{Ge}, to demonstrate the feasibility of a large-scale Ge detector experiment to search for neutrinoless double beta decay. The long half-life of this postulated process requires that the apparatus be extremely low in radioactive isotopes whose decays may produce backgrounds to...
Topics: High Energy Physics - Experiment, Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1601.03779
5
5.0
Jun 30, 2018
06/18
by
N. Abgrall; I. J. Arnquist; F. T. Avignone; A. S. Barabash; F. E. Bertrand; M. Boswell; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; T. S. Caldwell; C. D. Christofferson; P. -H. Chu; C. Cuesta; J. A. Detwiler; C. Dunagan; Yu. Efremenko; H. Ejiri; S. R. Elliott; Z. Fu; V. M. Gehman; T. Gilliss; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; C. R. Haufe; R. Henning; E. W. Hoppe; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T....
texts
eye 5
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The MAJORANA Collaboration is searching for the neutrinoless double-beta decay of the nucleus $^{76}$Ge. The MAJORANA DEMONSTRATOR is an array of germanium detectors deployed with the aim of implementing background reduction techniques suitable for a 1-tonne $^{76}$Ge-based search. The ultra low-background conditions require regular calibrations to verify proper function of the detectors. Radioactive line sources can be deployed around the cryostats containing the detectors for regular energy...
Topics: Physics, Nuclear Experiment, Instrumentation and Detectors
Source: http://arxiv.org/abs/1702.02466
7
7.0
Jun 29, 2018
06/18
by
N. Abgrall; I. J. Arnquist; F. T. Avignone; A. S. Barabash; F. E. Bertrand; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; T. S. Caldwell; Y-D. Chan; C. D. Christofferson; P. -H. Chu; C. Cuesta; J. A. Detwiler; C. Dunagan; Yu. Efremenko; H. Ejiri; S. R. Elliott; T. Gilliss; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; C. R. S. Haufe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; A....
texts
eye 7
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We present new limits on exotic keV-scale physics based on 478 kg d of MAJORANA DEMONSTRATOR commissioning data. Constraints at the 90% confidence level are derived on bosonic dark matter (DM) and solar axion couplings, Pauli exclusion principle violating (PEPV) decay, and electron decay using monoenergetic peak signal-limits above our background. Our most stringent DM constraints are set for 11.8 keV mass particles, limiting $g_{Ae}
Topics: Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1612.00886
9
9.0
Jun 29, 2018
06/18
by
N. Abgrall; I. J. Arnquist; F. T. Avignone; A. S. Barabash; F. E. Bertrand; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; P. -H. Chu; C. Cuesta; J. A. Detwiler; P. J. Doe; C. Dunagan; Yu. Efremenko; H. Ejiri; S. R. Elliott; Z. Fu; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I....
texts
eye 9
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The MAJORANA Collaboration is constructing the MAJORANA Demonstrator, an ultra-low background, 44-kg modular high-purity Ge (HPGe) detector array to search for neutrinoless double-beta decay in Ge-76. The phenomenon of surface micro-discharge induced by high-voltage has been studied in the context of the MAJORANA Demonstrator. This effect can damage the front-end electronics or mimic detector signals. To ensure the correct performance, every high-voltage cable and feedthrough must be capable of...
Topics: High Energy Physics - Experiment, Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1603.08483
6
6.0
Jun 29, 2018
06/18
by
N. Abgrall; I. J. Arnquist; F. T. Avignone; A. S. Barabash; F. E. Bertrand; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; P. -H. Chu; C. Cuesta; J. A. Detwiler; C. Dunagan; Yu. Efremenko; H. Ejiri; S. R. Elliott; P. S Finnerty; A. Galindo-Uribarri; T. Gilliss; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I....
texts
eye 6
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A search for Pauli-exclusion-principle-violating K-alpha electron transitions was performed using 89.5 kg-d of data collected with a p-type point contact high-purity germanium detector operated at the Kimballton Underground Research Facility. A lower limit on the transition lifetime of 5.8x10^30 seconds at 90% C.L. was set by looking for a peak at 10.6 keV resulting from the x-ray and Auger electrons present following the transition. A similar analysis was done to look for the decay of atomic...
Topics: Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1610.06141
18
18
Jun 26, 2018
06/18
by
Majorana Collaboration; W. Xu; N. Abgrall; F. T. Avignone; A. S. Barabash; F. E. Bertrand; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; C. Cuesta; J. A. Detwiler; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; B. D. LaFerriere; J. Leon;...
texts
eye 18
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Neutrinoless double-beta decay is a hypothesized process where in some even-even nuclei it might be possible for two neutrons to simultaneously decay into two protons and two electrons without emitting neutrinos. This is possible only if neutrinos are Majorana particles, i.e. fermions that are their own antiparticles. Neutrinos being Majorana particles would explicitly violate lepton number conservation, and might play a role in the matter-antimatter asymmetry in the universe. The observation...
Topics: Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1501.03089
89
89
Jul 20, 2013
07/13
by
M. Prall; P. Renschler; F. Glück; A. Beglarian; H. Bichsel; L. Bornschein; Z. Chaoui; G. Drexlin; F. Fränkle; S. Görhardt; S. Mertens; M. Steidl; Th. Thümmler; S. Wüstling; C. Weinheimer; S. Zadorozhny
texts
eye 89
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The KArlsruhe TRItium Neutrino experiment, KATRIN, will determine the mass of the electron neutrino with a sensitivity of 0.2 eV (90% C.L.) via a measurement of the beta-spectrum of gaseous tritium near its endpoint of E_0 =18.57 keV. An ultra-low background of about b = 10 mHz is among the requirements to reach this sensitivity. In the KATRIN main beam-line two spectrometers of MAC-E filter type are used in a tandem configuration. This setup, however, produces a Penning trap which could lead...
Source: http://arxiv.org/abs/1203.2444v1
10
10.0
Jun 29, 2018
06/18
by
M. Arenz; M. Babutzka; M. Bahr; J. P. Barrett; S. Bauer; M. Beck; A. Beglarian; J. Behrens; T. Bergmann; U. Besserer; J. Blümer; M. Prall; F. Priester; P. C. -O. Ranitzsch; J. Reich; O. Rest; R. G. H. Robertson; M. Röllig; S. Rosendahl; S. Rupp; M. Rysavy; L. I. Bodine; K. Schlösser; M. Schlösser; K. Schönung; M. Schrank; J. Schwarz; W. Seiler; H. Seitz-Moskaliuk; J. Sentkerestiova; A. Skasyrskaya; M. Slezak; K. Bokeloh; A. Spalek; M. Steidl; N. Steinbrink; M. Sturm; M. Suesser; H. H....
texts
eye 10
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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. The strong magnetic field that guides the beta-electrons is provided by super-conducting solenoids at both ends...
Topics: Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1603.01014
4
4.0
Jun 29, 2018
06/18
by
K. Dolde; S. Mertens; D. Radford; T. Bode; A. Huber; M. Korzeczek; T. Lasserre; M. Slezak
texts
eye 4
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ADC non-linearities are a major systematic effect in the search for keV-scale sterile neutrinos with tritium $\beta$-decay experiments like KATRIN. They can significantly distort the spectral shape and thereby obscure the tiny kink-like signature of a sterile neutrino. In this work we demonstrate various mitigation techniques to reduce the impact of ADC non-linearities on the tritium $\beta$-decay spectrum to a level of $
Topics: High Energy Physics - Phenomenology, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1608.03158
10
10.0
Jun 29, 2018
06/18
by
J. Gruszko; N. Abgrall; I. J. Arnquist; F. T. Avignone; A. S. Barabash; F. E. Bertrand; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; T. S. Caldwell; Y-D. Chan; C. D. Christofferson; P. H. Chu; C. Cuesta; J. A. Detwiler; C. Dunagan; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Fullmer; A. Galindo-Uribarri; T. Gilliss; G. K. Giovanetti; M. P. Green; I. S. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; J. Leon;...
texts
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The Majorana Demonstrator searches for neutrinoless double-beta decay of $^{76}$Ge using arrays of high-purity germanium detectors. If observed, this process would demonstrate that lepton number is not a conserved quantity in nature, with implications for grand-unification and for explaining the predominance of matter over antimatter in the universe. A problematic background in such large granular detector arrays is posed by alpha particles. In the Majorana Demonstrator, events have been...
Topics: Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1610.03054
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25
Jun 28, 2018
06/18
by
I. Guinn; N. Abgrall; I. J. Arnquist; F. T. Avignone; C. X. Baldenegro-Barrera; A. S. Barabash; F. E. Bertrand; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; C. Cuesta; J. A. Detwiler; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Galindo-Uribarri; T. Gilliss; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R....
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The MAJORANA Collaboration will seek neutrinoless double beta decay (0nbb) in 76Ge using isotopically enriched p-type point contact (PPC) high purity Germanium (HPGe) detectors. A tonne-scale array of HPGe detectors would require background levels below 1 count/ROI-tonne-year in the 4 keV region of interest (ROI) around the 2039 keV Q-value of the decay. In order to demonstrate the feasibility of such an experiment, the MAJORANA DEMONSTRATOR, a 40 kg HPGe detector array, is being constructed...
Topics: Instrumentation and Detectors, Physics, Nuclear Experiment
Source: http://arxiv.org/abs/1506.04279
22
22
Jun 26, 2018
06/18
by
I. Guinn; N. Abgrall; F. T. Avignone; A. S. Barabash; F. E. Bertrand; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; C. Cuesta; J. A. Detwiler; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; B. D. LaFerriere; J. Leon; J. MacMullin; R. D. Martin; S....
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The MAJORANA DEMONSTRATOR is a planned 40 kg array of Germanium detectors intended to demonstrate the feasibility of constructing a tonne-scale experiment that will seek neutrinoless double beta decay ($0\nu\beta\beta$) in $^{76}\mathrm{Ge}$. Such an experiment would require backgrounds of less than 1 count/tonne-year in the 4 keV region of interest around the 2039 keV Q-value of the $\beta\beta$ decay. Designing low-noise electronics, which must be placed in close proximity to the detectors,...
Topics: Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1502.03174
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7.0
Jun 30, 2018
06/18
by
G. K. Giovanetti; N. Abgrall; E. Aguayo; F. T. Avignone; A. S. Barabash; F. E. Bertrand; M. Boswell; V. Brudanin; M. Busch; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; D. C. Combs; C. Cuesta; J. A. Detwiler; P. J. Doe; Yu. Efremenko; V. Egorov; H. Ejiri; S. R. Elliott; J. E. Fast; P. Finnerty; F. M. Fraenkle; A. Galindo-Uribarri; J. Goett; M. P. Green; J. Gruszko; V. E. Guiseppe; K. Gusev; A. L. Hallin; R. Hazama; A. Hegai; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; K. J....
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eye 7
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The MAJORANA DEMONSTRATOR is an array of natural and enriched high purity germanium detectors that will search for the neutrinoless double-beta decay of 76-Ge and perform a search for weakly interacting massive particles (WIMPs) with masses below 10 GeV. As part of the MAJORANA research and development efforts, we have deployed a modified, low-background broad energy germanium detector at the Kimballton Underground Research Facility. With its sub-keV energy threshold, this detector is sensitive...
Topics: Instrumentation and Detectors, Physics, Nuclear Experiment, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1407.2238
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70
Sep 22, 2013
09/13
by
F. M. Fränkle; L. Bornschein; G. Drexlin; F. Glück; S. Görhardt; W. Käfer; S. Mertens; N. Wandkowsky; J. Wolf
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eye 70
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The KArlsruhe TRItium Neutrino (KATRIN) experiment is a next generation, model independent, large scale tritium beta-decay experiment to determine the effective electron anti-neutrino mass by investigating the kinematics of tritium beta-decay with a sensitivity of 200 meV/c2 using the MAC-E filter technique. In order to reach this sensitivity, a low background level of 0.01 counts per second (cps) is required. This paper describes how the decay of radon in a MAC-E filter generates background...
Source: http://arxiv.org/abs/1103.6238v1
3
3.0
Jun 30, 2018
06/18
by
Enlong Liu; J. Swerts; T. Devolder; S. Couet; S. Mertens; T. Lin; V. Spampinato; A. Franquet; T. Conard; S. Van Elshocht; A. Furnemont; J. De Boeck; G. Kar
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[Co/Ni] multilayers with perpendicular magnetic anisotropy (PMA) have been researched and applied in various spintronic applications. Typically the seed layer material is studied to provide the desired face-centered cubic (\textit{fcc}) texture to the [Co/Ni] to obtain PMA. The integration of [Co/Ni] in back-end-of-line (BEOL) processes also requires the PMA to survive post-annealing. In this paper, the impact of NiCr, Pt, Ru, and Ta seed layers on the structural and magnetic properties of...
Topics: Materials Science, Condensed Matter
Source: http://arxiv.org/abs/1701.07713
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18
Jun 28, 2018
06/18
by
C. Cuesta; N. Abgrall; I. J. Arnquist; F. T. Avignone; C. X. Baldenegro-Barrera; A. S. Barabash; F. E. Bertrand; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; P. -H. Chu; J. A. Detwiler; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Galindo-Uribarri; T. Gilliss; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I....
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eye 18
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The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, an ultra-low background, modular, HPGe detector array with a mass of 44-kg (29 kg 76Ge and 15 kg natGe) to search for neutrinoless double beta decay in Ge-76. The next generation of tonne-scale Ge-based neutrinoless double beta decay searches will probe the neutrino mass scale in the inverted-hierarchy region. The MAJORANA DEMONSTRATOR is envisioned to demonstrate a path forward to achieve a background rate at or below 1...
Topics: Instrumentation and Detectors, Physics, Nuclear Experiment
Source: http://arxiv.org/abs/1507.07612
17
17
Jun 27, 2018
06/18
by
C. Cuesta; N. Abgrall; I. J. Arnquist; F. T. Avignone; C. X. Baldenegro-Barrera; A. S. Barabash; F. E. Bertrand; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; J. A. Detwiler; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Galindo-Uribarri; T. Gilliss; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov;...
texts
eye 17
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The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, an ultra-low background, 40-kg modular HPGe detector array to search for neutrinoless double beta decay in 76Ge. In view of the next generation of tonne-scale Ge-based 0nbb-decay searches that will probe the neutrino mass scale in the inverted-hierarchy region, a major goal of the MAJORANA DEMONSTRATOR is to demonstrate a path forward to achieving a background rate at or below 1 count/tonne/year in the 4 keV region of...
Topics: Instrumentation and Detectors, Physics
Source: http://arxiv.org/abs/1506.03202
6
6.0
Jun 30, 2018
06/18
by
C. Cuesta; N. Abgrall; I. J. Arnquist; F. T. Avignone; A. S. Barabash; F. E. Bertrand; V. Brudanin; M. Busch; M. Buuck; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; J. A. Detwiler; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Greenn; J. Gruszko; I. S. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; B. D. LaFerriere; J. Leon; J....
texts
eye 6
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The MAJORANA Collaboration is constructing the MAJORANA Demonstrator, an ultra-low background, 40-kg modular high purity Ge detector array to search for neutrinoless double-beta decay in Ge. In view of the next generation of tonne-scale Ge-based neutrinoless double-beta decay searches that will probe the neutrino mass scale in the inverted-hierarchy region, a major goal of the Demonstrator is to demonstrate a path forward to achieving a background rate at or below 1 count/tonne/year in the 4...
Topics: Physics, Nuclear Experiment, Instrumentation and Detectors
Source: http://arxiv.org/abs/1412.5682
3
3.0
Jun 29, 2018
06/18
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C. Cuesta; N. Abgrall; I. J. Arnquist; F. T. Avignone; A. S. Barabash; F. E. Bertrand; A. W. Bradley; V. Brudanin; M. Busch; M. Buuck; T. S. Caldwell; Y-D. Chan; C. D. Christofferson; P. -H. Chu; J. A. Detwiler; C. Dunagan; Yu. Efremenko; H. Ejiri; S. R. Elliott; A. Fullmer; A. Galindo-Uribarri; T. Gilliss; G. K. Giovanetti; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; R. Henning; E. W. Hoppe; M. A. Howe; B. R. Jasinski; K. J. Keeter; M. F. Kidd; S. I. Konovalov; R. T. Kouzes; J. Leon;...
texts
eye 3
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The MAJORANA Collaboration is constructing a system containing 44 kg of high-purity Ge (HPGe) detectors to demonstrate the feasibility and potential of a future tonne-scale experiment capable of probing the neutrino mass scale to ~15 meV. To realize this, a major goal of the MAJORANA DEMONSTRATOR is to demonstrate a path forward to achieving a background rate at or below 1 count/(ROI-t-y) in the 4 keV region of interest (ROI) around the Q-value at 2039 keV. This goal is pursued through a...
Topics: Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1610.01146
3
3.0
Jun 30, 2018
06/18
by
C. Cuesta; N. Abgrall; E. Aguayo; F. T. Avignone; A. S. Barabash; F. E. Bertrand; M. Boswell; V. Brudanin; M. Busch; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; D. C. Combs; J. A. Detwiler; P. J. Doe; Yu. Efremenko; V. Egorov; H. Ejiri; S. R. Elliott; J. E. Fast; P. Finnerty; F. M. Fraenkle; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; V. E. Guiseppe; K. Gusev; A. L. Hallin; R. Hazama; A. Hegai; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; K. J....
texts
eye 3
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The Majorana Collaboration is constructing a system containing 40 kg of HPGe detectors to demonstrate the feasibility and potential of a future tonne-scale experiment capable of probing the neutrino mass scale in the inverted-hierarchy region. To realize this, a major goal of the Majorana Demonstrator is to demonstrate a path forward to achieving a background rate at or below 1 cnt/(ROI-t-y) in the 4 keV region of interest around the Q-value at 2039 keV. This goal is pursued through a...
Topics: Physics, Nuclear Experiment, Instrumentation and Detectors
Source: http://arxiv.org/abs/1405.1370
3
3.0
Jun 29, 2018
06/18
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C. Cuesta; M. Buuck; J. A. Detwiler; J. Gruszko; I. S. Guinn; J. Leon; R. G. H. Robertson; N. Abgrall; A. W. Bradley; Y-D. Chan; S. Mertens; A. W. P. Poon; K. Vetter; I. J. Arnquist; E. W. Hoppe; R. T. Kouzes; J. L. Orrell; F. T. Avignone; A. S. Barabash; S. I. Konovalov; V. Yumatov; F. E. Bertrand; A. Galindo-Uribarri; D. C. Radford; R. L. Varner; C. -H. Yu; V. Brudanin; M. Shirchenko; S. Vasilyev; E. Yakushev; I. Zhitnikov; M. Busch; T. S. Caldwell; T. Gilliss; R. Henning; M. A. Howe; J....
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eye 3
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The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, an ultra-low background, modular, HPGe detector array with a mass of 44.8-kg (29.7 kg enriched >88% in Ge-76) to search for neutrinoless double beta decay in Ge-76. The next generation of tonnescale Ge-based neutrinoless double beta decay searches will probe the neutrino mass scale in the inverted-hierarchy region. The MAJORANA DEMONSTRATOR is envisioned to demonstrate a path forward to achieve a background rate at or...
Topics: Nuclear Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1608.07340
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40
Sep 19, 2013
09/13
by
C. Borgs; J. T. Chayes; S. Mertens; B. Pittel
texts
eye 40
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We consider the problem of partitioning $n$ integers into two subsets of given cardinalities such that the discrepancy, the absolute value of the difference of their sums, is minimized. The integers are i.i.d. random variables chosen uniformly from the set $\{1,...,M\}$. We study how the typical behavior of the optimal partition depends on $n,M$ and the bias $s$, the difference between the cardinalities of the two subsets in the partition. In particular, we rigorously establish this typical...
Source: http://arxiv.org/abs/cond-mat/0302536v1
