Showing papers by "K. van Bibber published in 2014"
TL;DR: The physics of the SLAC and KEK B Factories are described in this paper, with a brief description of the detectors, BaBar and Belle, and data taking related issues.
Abstract: This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and data taking related issues. Part B discusses tools and methods used by the experiments in order to obtain results. The results themselves can be found in Part C.
413 citations
University of South Carolina1, CERN2, University of Trieste3, University of Zaragoza4, Lawrence Livermore National Laboratory5, Lawrence Berkeley National Laboratory6, Doğuş University7, University of Haifa8, Technical University of Denmark9, Petersburg Nuclear Physics Institute10, University of Bonn11, University of Hamburg12, Aristotle University of Thessaloniki13, University of Valencia14, Russian Academy of Sciences15, Yukawa Institute for Theoretical Physics16, Technische Universität Darmstadt17, Institut de Ciències de l'Espai18, Japan Atomic Energy Agency19, Heidelberg University20, University of Tokyo21, University of Rijeka22, Kyoto University23, Max Planck Society24, Tokyo Institute of Technology25, Brookhaven National Laboratory26, University of Florida27, University of California, Berkeley28, University of Cape Town29, Fermilab30, University of Patras31
TL;DR: The International Axion Observatory (IAXO) as mentioned in this paper is the most powerful axion helioscope, reaching sensitivity to axion-photon couplings down to a few × 10−12 GeV−1 and thus probing a large fraction of the currently unexplored axion and ALP parameter space.
Abstract: The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO will look for axions or axion-like particles (ALPs) originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal-to-noise ratio, IAXO will be about 4–5 orders of magnitude more sensitive than CAST, currently the most powerful axion helioscope, reaching sensitivity to axion-photon couplings down to a few × 10−12 GeV−1 and thus probing a large fraction of the currently unexplored axion and ALP parameter space. IAXO will also be sensitive to solar axions produced by mechanisms mediated by the axion-electron coupling gae with sensitivity — for the first time — to values of gae not previously excluded by astrophysics. With several other possible physics cases, IAXO has the potential to serve as a multi-purpose facility for generic axion and ALP research in the next decade. In this paper we present the conceptual design of IAXO, which follows the layout of an enhanced axion helioscope, based on a purpose-built 20 m-long 8-coils toroidal superconducting magnet. All the eight 60cm-diameter magnet bores are equipped with focusing x-ray optics, able to focus the signal photons into ~ 0.2 cm2 spots that are imaged by ultra-low-background Micromegas x-ray detectors. The magnet is built into a structure with elevation and azimuth drives that will allow for solar tracking for ~ 12 h each day.
318 citations
TL;DR: A brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and data taking related issues can be found in Part A of this book as mentioned in this paper.
Abstract: This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and data taking related issues. Part B discusses tools and methods used by the experiments in order to obtain results. The results themselves can be found in Part C.
Please note that version 3 on the archive is the auxiliary version of the Physics of the B Factories book. This uses the notation alpha, beta, gamma for the angles of the Unitarity Triangle. The nominal version uses the notation phi_1, phi_2 and phi_3. Please cite this work as Eur. Phys. J. C74 (2014) 3026.
282 citations
Doğuş University1, CERN2, Russian Academy of Sciences3, Max Planck Society4, Istituto Nazionale di Fisica Nucleare5, University of Zaragoza6, University of Chicago7, Aristotle University of Thessaloniki8, University of Patras9, National Technical University of Athens10, University of Freiburg11, Technische Universität Darmstadt12, University of British Columbia13, Goethe University Frankfurt14, Lawrence Livermore National Laboratory15
TL;DR: From the absence of excess x rays when the magnet was pointing to the Sun, the CERN Axion Solar Telescope set a typical upper limit on the axion-photon coupling of gaγ, with the exact value depending on the pressure setting.
Abstract: The CERN Axion Solar Telescope has finished its search for solar axions with He-3 buffer gas, covering the search range 0.64 eV less than or similar to ma less than or similar to 1.17 eV. This closes the gap to the cosmological hot dark matter limit and actually overlaps with it. From the absence of excess x rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g(a gamma) less than or similar to 3.3 x 10(-10) GeV-1 at 95% C.L., with the exact value depending on the pressure setting. Future direct solar axion searches will focus on increasing the sensitivity to smaller values of g(a gamma), for example by the currently discussed next generation helioscope International AXion Observatory.
145 citations
TL;DR: The Axion Dark Matter eXperiment at High Frequencies (ADMX-HF) as discussed by the authors was designed to detect axions in a microwave cavity permeated by a magnetic field.
Abstract: The axion is a light pseudoscalar particle which suppresses CP-violating effects in strong interactions and also happens to be an excellent dark matter candidate. Axions constituting the dark matter halo of our galaxy may be detected by their resonant conversion to photons in a microwave cavity permeated by a magnetic field. The current generation of the microwave cavity experiment has demonstrated sensitivity to plausible axion models, and upgrades in progress should achieve the sensitivity required for a definitive search, at least for low mass axions. However, a comprehensive strategy for scanning the entire mass range, from 1–1000 μeV, will require significant technological advances to maintain the needed sensitivity at higher frequencies. Such advances could include sub-quantum-limited amplifiers based on squeezed vacuum states, bolometers, and/or superconducting microwave cavities. The Axion Dark Matter eXperiment at High Frequencies (ADMX-HF) represents both a pathfinder for first data in the 20–100 μeV range (~5–25 GHz), and an innovation test-bed for these concepts.
80 citations
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TL;DR: The Advanced Scintillation Detector Concept (ASDC) as discussed by the authors uses water-based liquid scintillator (WbLS) and doping with a number of potential isotopes for a range of physics goals, high efficiency and ultra-fast timing photosensors.
Abstract: The recent development of Water-based Liquid Scintillator (WbLS), and the concurrent development of high-efficiency and high-precision-timing light sensors, has opened up the possibility for a new kind of large-scale detector capable of a very broad program of physics. The program would include determination of the neutrino mass hierarchy and observation of CP violation with long-baseline neutrinos, searches for proton decay, ultra-precise solar neutrino measurements, geo- and supernova neutrinos including diffuse supernova antineutrinos, and neutrinoless double beta decay. We outline here the basic requirements of the Advanced Scintillation Detector Concept (ASDC), which combines the use of WbLS, doping with a number of potential isotopes for a range of physics goals, high efficiency and ultra-fast timing photosensors, and a deep underground location. We are considering such a detector at the Long Baseline Neutrino Facility (LBNF) far site, where the ASDC could operate in conjunction with the liquid argon tracking detector proposed by the LBNE collaboration. The goal is the deployment of a 30-100 kiloton-scale detector, the basic elements of which are being developed now in experiments such as WATCHMAN, ANNIE, SNO+, and EGADS.
66 citations
13 Jan 2014
TL;DR: The most promising method to searchfor axions and axion-likeparticles (ALPs) is their con-version to photons in macroscopic magnetic fields as mentioned in this paper, which includes the search for solar axions by thehelioscope technique.
Abstract: Introduction.—The most promising method to searchfor axions and axion-likeparticles (ALPs) [1–4], low-massbosons with a two-photon interaction vertex, is their con-version to photons in macroscopic magnetic fields [5–7].This approach includes the search for solar axions by thehelioscope technique [8–15], photon regeneration exper-iments (“shining light through a wall”) [16–18], axion-photon conversion in astrophysical B fields [19–22], andthe search for galactic axion dark matter [23–27].One limiting factor in any of these efforts is the mo-mentum difference between freely propagating photonsand axions caused by the axion mass m
26 citations
TL;DR: In this paper, a bibenzyl-stilbene mixed single-crystal organic scintillator was used as a neutron detector at the National Ignition Facility (NIF).
Abstract: The neutron time-of-flight (nTOF) diagnostics used to characterize implosions at the National Ignition Facility (NIF) has necessitated the development of novel scintillators that exhibit a rapid temporal response and high light yield. One such material, a bibenzyl-stilbene mixed single-crystal organic scintillator grown in a 99.5:0.5 ratio in solution, has become the standard scintillator used for nTOF diagnostics at NIF. The prompt fluorescence lifetime and relative light yield as a function of proton energy were determined to calibrate this material as a neutron detector. The temporal evolution of the intensity of the prompt fluorescent response was modeled using first-order reaction kinetics and the prompt fluorescence decay constant was determined to be 2.46 ± 0.01 (fit) ± 0.13 (systematic) ns. The relative response of the bibenzyl-stilbene mixed crystal generated by recoiling protons was measured, and results were analyzed using Birks' relation to quantify the non-radiative quenching of excitation energy in the scintillator.
18 citations
University of South Carolina1, CERN2, University of Trieste3, University of Zaragoza4, Lawrence Livermore National Laboratory5, Lawrence Berkeley National Laboratory6, Doğuş University7, University of Haifa8, Technical University of Denmark9, Petersburg Nuclear Physics Institute10, University of Bonn11, University of Hamburg12, Aristotle University of Thessaloniki13, University of Valencia14, Russian Academy of Sciences15, Yukawa Institute for Theoretical Physics16, Technische Universität Darmstadt17, Institut de Ciències de l'Espai18, Japan Atomic Energy Agency19, Heidelberg University20, University of Tokyo21, University of Rijeka22, Kyoto University23, Max Planck Society24, Tokyo Institute of Technology25, Brookhaven National Laboratory26, University of Florida27, University of California, Berkeley28, University of Cape Town29, Fermilab30, University of Patras31
TL;DR: The International Axion Observatory (IAXO) as discussed by the authors is the most powerful axion helioscope to date in terms of signal-to-noise ratio, reaching sensitivity to axion-photon couplings down to a few times 10 − 12 − 1 − 2 GeV$ − 1 /ε − 1/ε 2 ) and thus probing a large fraction of the currently unexplored axion and ALP parameter space.
Abstract: The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO will look for axions or axion-like particles (ALPs) originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal-to-noise ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, currently the most powerful axion helioscope, reaching sensitivity to axion-photon couplings down to a few $\times 10^{-12}$ GeV$^{-1}$ and thus probing a large fraction of the currently unexplored axion and ALP parameter space. IAXO will also be sensitive to solar axions produced by mechanisms mediated by the axion-electron coupling $g_{ae}$ with sensitivity $-$for the first time$-$ to values of $g_{ae}$ not previously excluded by astrophysics. With several other possible physics cases, IAXO has the potential to serve as a multi-purpose facility for generic axion and ALP research in the next decade. In this paper we present the conceptual design of IAXO, which follows the layout of an enhanced axion helioscope, based on a purpose-built 20m-long 8-coils toroidal superconducting magnet. All the eight 60cm-diameter magnet bores are equipped with focusing x-ray optics, able to focus the signal photons into $\sim 0.2$ cm$^2$ spots that are imaged by ultra-low-background Micromegas x-ray detectors. The magnet is built into a structure with elevation and azimuth drives that will allow for solar tracking for $\sim$12 h each day.
18 citations
Lawrence Berkeley National Laboratory1, University of Jordan2, Charles University in Prague3, Hungarian Academy of Sciences4, Lawrence Livermore National Laboratory5, Seoul National University6, Forschungszentrum Jülich7, Berkeley Geochronology Center8, Technische Universität München9, University of Oslo10, University of California, Berkeley11
TL;DR: The Evaluated Gamma-ray Activation File (EGAF) as mentioned in this paper is the result of a 2000-2007 IAEA Coordinated Research Project to develop a database of thermal, prompt γ-ray cross sections, σ 0, for all elemental and selected radioactive targets.
11 citations
TL;DR: The Axion Dark Matter eXperiment at High Frequencies (ADMX-HF) as discussed by the authors was designed to detect axions in a microwave cavity permeated by a magnetic field.
Abstract: The axion is a light pseudoscalar particle which suppresses CP-violating effects in strong interactions and also happens to be an excellent dark matter candidate. Axions constituting the dark matter halo of our galaxy may be detected by their resonant conversion to photons in a microwave cavity permeated by a magnetic field. The current generation of the microwave cavity experiment has demonstrated sensitivity to plausible axion models, and upgrades in progress should achieve the sensitivity required for a definitive search, at least for low mass axions. However, a comprehensive strategy for scanning the entire mass range, from 1-1000 $\mu$eV, will require significant technological advances to maintain the needed sensitivity at higher frequencies. Such advances could include sub-quantum-limited amplifiers based on squeezed vacuum states, bolometers, and/or superconducting microwave cavities. The Axion Dark Matter eXperiment at High Frequencies (ADMX-HF) represents both a pathfinder for first data in the 20-100 $\mu$eV range ($\sim$5-25 GHz), and an innovation test-bed for these concepts.