Search

Your search keyword '"KNEUPNER, K."' showing total 2 results
Start Over Author "KNEUPNER, K." Topic astrophysics::high energy astrophysical phenomena
2 results on '"KNEUPNER, K."'

1. High-resolution gamma ray spectroscopy measurements of the fast ion energy distribution in JET 4He plasmas

Author

A. E. Shevelev, V. G. Kiptily, R. C. Pereira, M. Nocente, Jet-Efda Contributors, João M. C. Sousa, I. N. Chugunov, D. B. Syme, Giovanni Grosso, Sean Conroy, Giuseppe Gorini, Andre Neto, S. E. Sharapov, K. Kneupner, P. Blanchard, E. Perelli Cippo, D. B. Gin, E. Lerche, T. Edlington, M. Tardocchi, A. Murari, Göran Ericsson, Ana Fernandes, M. Gatu Johnson, D. Van Eester, Carl Hellesen, Nocente, M, Tardocchi, M, Kiptily, V, Blanchard, P, Chugunov, I, Conroy, S, Edlington, T, Fernandes, A, Ericsson, G, Johnson, M, Gin, D, Grosso, G, Hellesen, C, Kneupner, K, Lerche, E, Murari, A, Neto, A, Pereira, R, Cippo, E, Sharapov, S, Shevelev, A, Sousa, J, Syme, D, Eester, D, and Gorini, G

Subjects
Physics, Nuclear and High Energy Physics, Jet (fluid), Range (particle radiation), NEUTRON EMISSION, Astrophysics::High Energy Astrophysical Phenomena, 52.50.Qt Plasma heating by radio-frequency field, Joint European Torus, Plasma, Condensed Matter Physics, OF-FLIGHT SPECTROMETER, Ion, FUSION PLASMAS, Nuclear physics, LIGHT-NUCLEI, FIS/01 - FISICA SPERIMENTALE, Deuterium, ICR, ICP, helicon, Gamma spectroscopy, ALPHA-PARTICLE DIAGNOSTICS, 52.65.Pp Monte Carlo method, Atomic physics, 52.70.La X-ray and gamma-ray measurement, 52.55.Pi Fusion products effects (e.g., alpha-particles, etc.), fast particle effects, Doppler broadening
Abstract

High-resolution γ-ray measurements were carried out on the Joint European Torus (JET) in an experiment aimed at accelerating 4He ions in the MeV range by coupling third harmonic radio frequency heating to an injected 4He beam. For the first time, Doppler broadening of γ-ray peaks from the 12C(d, pγ)13C and 9Be(α, nγ)12C reactions was observed and interpreted with dedicated Monte Carlo codes based on the detailed nuclear physics of the processes. Information on the confined 4He and deuteron energy distribution was inferred, and confined 4He ions with energies as high as 6 MeV were assessed. A signature of MHD activity in γ-ray traces was also detected. The reported results have a bearing on diagnostics for fast ions in the MeV range in next step fusion devices.

Published
2012
Full Text
View/download PDF

2. Doppler broadening of gamma ray lines and fast ion distribution in JET plasmas

Author

S. E. Sharapov, K. Kneupner, M. Gatu Johnson, Massimo Nocente, I.N. Chugunov, F. E. Cecil, Thomas Johnson, Teddy Craciunescu, Vasile Zoita, A. E. Shevelev, P.G. Sanchez, A. Pietropaolo, P. de Vries, E. Perelli, Andrea Murari, Vasily Kiptily, Giuseppe Gorini, Jet-Efda Contributors, Carl Hellesen, V.A. Yavorskij, V. Goloborod'ko, M. Tardocchi, S. D. Pinches, D. Gin, I. Proverbio, D. B. Syme, Kiptily, V, Gorini, G, Tardocchi, M, de Vries, P, Cecil, F, Chugunov, I, Craciunescu, T, Gatu Johnson, M, Gin, D, Goloborod’Ko, V, Hellesen, C, Johnson, T, Kneupner, K, Murari, A, Nocente, M, Perelli Cippo, E, Pietropaolo, A, Pinches, S, Proverbio, I, Sanchez, P, Sharapov, S, Shevelev, A, Syme, B, Yavorskij, V, Zoita, V, and JET EFDA, C

Subjects
Nuclear reaction, Nuclear and High Energy Physics, Jet (fluid), Materials science, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, chemistry.chemical_element, Plasma, equipment and supplies, Condensed Matter Physics, Ion, FIS/01 - FISICA SPERIMENTALE, ___, chemistry, gamma ray, JET, Physics::Plasma Physics, High Energy Physics::Experiment, Beryllium, Atomic physics, Nuclear Experiment, Ion cyclotron resonance, Doppler broadening
Abstract

The Doppler broadening of individual γ-ray lines was measured with a high purity germanium detector in JET plasma experiments. High-resolution γ-ray spectrometry of nuclear reactions between energetic D, 3He and 4He ions accelerated by ion cyclotron resonance heating and main plasma impurities such as carbon and beryllium has been used. The nuclear reactions giving rise to γ-rays have been identified and an effective temperature of the heated ions has been obtained in JET discharges. This technique could be used for fast ion and fusion alpha-particle studies in ITER.

Published
2010
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results