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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We describe the status of a sensitive search for halo axions with masses in the [mu]eV range. A tunable large-volume and low-loss microwave cavity is operated at low temperature in a strong magnetic field. Resonant Primakoff conversion of axions into photons takes place when the cavity frequency is matched to the axion mass. No positive signal has been found so far, and we are able to exclude hadronic axions as the dominant halo component over a significant axion mass range. Future plans for a detector upgrade are outlined.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We describe the status of a sensitive search for halo axions with masses in the [mu]eV range. A tunable large-volume and low-loss microwave cavity is operated at low temperature in a strong magnetic field. Resonant Primakoff conversion of axions into photons takes place when the cavity frequency is matched to the axion mass. No positive signal has been found so far, and we are able to exclude hadronic axions as the dominant halo component over a significant axion mass range. Future plans for a detector upgrade are outlined.
Author: Publisher: ISBN: Category : Languages : en Pages : 6
Book Description
We report nearly all astrophysical and cosmological data point convincingly to a large component of cold dark matter in the Universe. The axion particle, first theorized as a solution to the strong charge-parity problem of quantum chromodynamics, has been established as a prominent CDM candidate. Cosmic observation and particle physics experiments have bracketed the unknown mass of the axion between approximately a [mu]eV and a meV. The Axion Dark Matter eXperiement (ADMX) has successfully completed searches between 1.9 and 3.7 [mu]eV down to the KSVZ photon-coupling limit. ADMX and the Axion Dark Matter eXperiement High-Frequency (ADMX-HF) will search for axions at weaker coupling and/or higher frequencies within the next few years. Status of the experiments, current research and development, and projected mass-coupling exclusion limits are presented.
Author: D. Kinion Publisher: ISBN: Category : Languages : en Pages :
Book Description
The author reports on the status of the Axion Dark-Matter Experiment (ADMX), the microwave-cavity-based axion search underway at Lawrence Livermore National Laboratory. The ADMX collaboration includes LLNL, the University of Florida, and M.I.T., and has been in operation since February, 1996.
Author: Vitaly Kudryavtsev Publisher: World Scientific ISBN: 9814486981 Category : Science Languages : en Pages : 684
Book Description
This book contains written versions of the presentations made at the 4th International Workshop on the Identification of Dark Matter (IDM 2002), held in York, UK, in September 2002. The objective of this workshop series is to assess the status of work attempting to identify what constitutes dark matter — in particular, to consider the techniques being used, how successful they are, and what new techniques are likely to improve prospects for identifying likely dark matter candidates in the future. At IDM 2002 special emphasis was placed on recent results obtained in searches for baryonic and non-baryonic dark matter. The proceedings include reviews of major topics on dark matter, as well as short contributed talks.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We describe the instrumentation and operations of the microwave cavity axion detector presently taking data at Lawrence Livermore National Laboratory This experiment, in collaboration of LLNL, MIT, Univ of Florida, LBNL, Univ of Chicago, FNAL, and INR/Moscow, has been operating with greater than 90% live time since February 1996 with the objective of exploring the region from 0 5 to 1 9 GHz (2 1 to 7 9 æeV) at greater than KSVZ sensitivitv In a com~ & on paper (E Daw) in these proceedings, the data analysis and Iirst results will be described (See also.
Author: Vitaly Kudryavtsev Publisher: World Scientific ISBN: 9814491179 Category : Science Languages : en Pages : 664
Book Description
The objective of the workshop series “The Identification of Dark Matter” is to assess critically the status of work attempting to identify what constitutes dark matter; in particular, to consider what techniques are currently being used, how successful they are, and what new techniques are likely to improve the prospects for identifying dark matter candidates in the future. This proceedings volume includes reviews on major particle astrophysics topics in the field of dark matter, as well as short contributed papers.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We review the status of two ongoing large-scale searches for axions which may constitute the dark matter of our Milky Way halo. The experiments are based on the microwave cavity technique proposed by Sikivie, and marks a ''second-generation'' to the original experiments performed by the Rochester-Brookhaven-Fermilab collaboration, and the University of Florida group.
Author: Markus Kuster Publisher: Springer Science & Business Media ISBN: 3540735178 Category : Science Languages : en Pages : 248
Book Description
Axions are peculiar hypothetical particles that could both solve the CP problem of quantum chromodynamics and at the same time account for the dark matter of the universe. Based on a series of lectures by world experts in this field held at CERN (Geneva), this volume provides a pedagogical introduction to the theory, cosmology and astrophysics of these fascinating particles and gives an up-to-date account of the status and prospect of ongoing and planned experimental searches.
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Author: D. Kinion
Author: Vitaly Kudryavtsev
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Author: Vitaly Kudryavtsev
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Author: Markus Kuster