TITLE

Neutron and high energy deuteron anisotropy investigations in plasma focus device

AUTHOR(S)
Roshan, M. V.; Rawat, R. S.; Talebitaher, A.; Lee, P.; Springham, S. V.
PUB. DATE
May 2009
SOURCE
Physics of Plasmas;May2009, Vol. 16 Issue 5, p053301
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The anisotropies of neutron and high energy deuteron emissions from the NX2 plasma focus device [M. V. Roshan et al., Phys. Lett. A 373, 851 (2009)] are studied. The nuclear activation of graphite targets is used to measure the fluences of high energy deuterons in the axial and radial directions. Two bismuth germanate scintillation detectors connected to multichannel analyzer systems are used for the detection of 511 keV gamma rays resulting from positron annihilation in the two targets. In addition, fast neutron activation detectors are employed to measure the axial and radial fluences of fusion neutrons. These detection systems are calibrated using the simulation code MCNPX [L. S. Waters et al., AIP Conf. Proc. 896, 81 (2007)]. Two distinct regimes of neutron and deuteron anisotropies are observed for the NX2 device. For deuterium gas pressures below 10 mbar, the neutron anisotropy increases with increasing pressure, while the overall neutron yield remains low. For gas pressures of 10–14 mbar, the neutron anisotropy is essentially constant, while, with increasing pressure, the neutron yield rises rapidly and the deuteron anisotropy falls.
ACCESSION #
40637861

 

Related Articles

  • Neutron Stars as a Source of the Short-Lived Nuclides in Ap-star Atmospheres. Gopka, Vera F.; Ulyanov, Oleg M.; Andrievsky, Sergey M. // AIP Conference Proceedings;5/21/2008, Vol. 1016 Issue 1, p460 

    We propose a new explanation of some magnetic chemically peculiar (MCP) star anomalies, which is based on an assumption that such stars be the close binary systems with a secondary component being a neutron star. Within this hypothesis one can naturally explain the main anomalous features of MCP...

  • Neutron yield measurements by use of foil activation at JT-60U. Hoek, Magnus; Nishitani, Takeo; Ikeda, Yujiro; Morioka, Atsuhiko // Review of Scientific Instruments;Jan1995, Vol. 66 Issue 1, p885 

    Studies the neutron yield measurements complemented by a recently installed neutron activation system. Use of threshold reactions to distinguish between neutron emissions; Calculation of neutron transport using Monte Carlo trajectory sampling methods.

  • HPGe well-type detectors for neutron activation measurements on the Frascati Tokamak Upgrade tokamak Bertalot, L.; Damian, M.; Esposito, B.; Lagamba, L.; Podda, S.; Batistoni, P.; De Felice, P.; Biagini, R. // Review of Scientific Instruments;Jan1997, Vol. 68 Issue 1, p528 

    Describes an improvement of the neutron activation system in operation on the Frascati Tokamak Upgrade tokamak for the measurement of the total neutron yield. Measuring system; Calibration sources; Efficiency calibration curve for the well-type detector.

  • Mössbauer and Positron Annihilation Spectroscopy Applied to WWER-1000 RPV Steels. Slugen, V.; Lipka, J.; Zeman, A.; Debarberis, L. // AIP Conference Proceedings;2005, Vol. 765 Issue 1, p322 

    Mössbauer spectroscopy (MS) and Positron annihilation spectroscopy (PAS) were applied in the evaluation of the microstructure parameters and degradation processes of nuclear reactor pressure vessel (RPV) steel surveillance specimens. Study was oriented to the material investigation of Russian...

  • Neutron activation measurements over an extremely wide dynamic range (invited) (abstract) Barnes, Cris W // Review of Scientific Instruments;Jan1997, Vol. 68 Issue 1, p520 

    Presents an abstract of a paper discussing absolutely calibrated neutron yield measurements over an extremely wide dynamic range using dosimetric reactions with thin elemental foils. International Thermonuclear Experimental Reactor burn durations; Thin foil techniques' lack of the sensitivity...

  • Neutron activation system using water flow for ITER. Nishitani, T.; Ebisawa, K.; Kasai, S.; Walker, C. // Review of Scientific Instruments;Mar2003, Vol. 74 Issue 3, p1735 

    A neutron activation system with flowing water using the [sup 16]O(n,p)[sup 16]N reaction has been designed for the International Thermonuclear Experimental Reaction (ITER) neutron yield monitor with temporal resolution, based on the experimental results carried out at the fusion neutronics...

  • Neutron Flux Stability Measurement of Miniature Neutron Source Research Reactors using 0.1%Au-Al Alloy and Pure Cu wires. Njinga, R. L.; Ibrahim, Y. V.; Adeleye, M. O.; Jonah, S. A. // Advances in Applied Science Research;Dec2011, Vol. 2 Issue 6, p488 

    The need to ascertain the neutron flux stability after the recent installation of permanent 1.0 mm cadmium lined in the larger outer irradiation channel A-3 was performed in this work. The specific activity ratios, inner-to-outer channel of Nigeria Research Reactor-1 (i.e. A-1/B-4, B- 2/B-4, and...

  • Rare-earth elemental analysis of banded iron-formations by instrumental neutron activation analysis. Nayak, P. K.; Wierczinski, B.; Lahiri, S. // Journal of Radioanalytical & Nuclear Chemistry;Oct2008, Vol. 278 Issue 1, p179 

    Representative banded iron-formations (BIFs) from various locations of the eastern Indian geological belt were investigated by instrumental neutron activation analysis (INAA). After pre-concentration, irradiation was carried out using a neutron flux of 5.1·1016 m−2·s−1,...

  • Application of Neutron Activation Analysis for Determination of As, Cr, Hg, and Se in Mosses in the Metropolitan Area of the Valley of Toluca, Mexico. Mejía-Cuero, R.; García-Rosales, G.; Longoria-Gándara, L. C.; López-Reyes, M. C.; Ávila-Pérez, P. // Journal of Chemistry;8/11/2015, Vol. 2015, p1 

    This research presents a study of environmental monitoring at different sampling sites from the Metropolitan Area of the Valley of Toluca (MAVT), Mexico, using mosses (Leskea angustata (Tayl.) and Fabronia ciliaris (Brid.)) and soil samples. The epiphytic mosses and soils were sampled in two...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics