Výsledky vyhledávání

Alpha particle diagnostics using impurity pellet injection (invited)

Autor: Joseph Snipes, J.L. Terry, S. S. Medley, R. K. Fisher, A. W. Howald, Stewart Zweben, E.S. Marmar, Paul Parks, J. M. McChesney

Publikováno v: Review of Scientific Instruments. 63:4499-4504

We have proposed using impurity pellet injection to measure the energy distribution of the fast confined alpha particles in a reacting plasma [R. K. Fisher et al., Fusion Technol. 13, 536 (1988)]. The ablation cloud surrounding the injected pellet is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f02bc8cec1b7794e2d94758485f01720
https://doi.org/10.1063/1.1143705

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Long-term follow-up of fenestrated endovascular repair for juxtarenal aortic aneurysm

Autor: I N, Roy, A M, Millen, S M, Jones, S R, Vallabhaneni, J R H, Scurr, R G, McWilliams, J A, Brennan, R K, Fisher

Publikováno v: The British Journal of Surgery

Background Fenestrated endovascular aneurysm repair (FEVAR) is increasingly being used for juxtarenal aortic aneurysms. The aim of this study was to review long‐term results and assess the importance of changing stent‐graft design on outcomes. Me

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::1df6d1cadd314677d5ec61ecd3daaf0e
https://pubmed.ncbi.nlm.nih.gov/28401533

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Physics Basis of a Fusion Development Facility Utilizing the Tokamak Approach

Autor: R. Prater, J.A. Leuer, G. M. Staebler, C. M. Greenfield, R.D. Stambaugh, M. A. Van Zeeland, A. D. Turnbull, T.W. Petrie, Ming-Sheng Chu, A.M. Garofalo, H.E. St. John, D.A. Humphreys, L.L. Lao, Vincent Chan, C.P.C. Wong, P. B. Snyder, R. K. Fisher

Publikováno v: Fusion Science and Technology. 57:66-93

The objective of the Fusion Development Facility (FDF) under consideration is to carry forward advanced tokamak physics for optimization of fusion reactors and enable development of fusion’s energy...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d0015760f46f4afc0c1817c484538493
https://doi.org/10.13182/fst10-a9269

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Chapter 6: Active Spectroscopy

Autor: George McKee, F. Levinton, K. H. Burrell, Daniel Thomas, R. K. Fisher, E. L. Foley

Publikováno v: Fusion Science and Technology. 53:487-527

In this chapter we discuss the various diagnostic techniques in which active spectroscopy plays a role. The use of an injected neutral beam - either a dedicated diagnostic beam or the main heating beams - to localize and enhance the spectroscopic mea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8f0dc41118f715fe1f46d78a1669ae1b
https://doi.org/10.13182/fst08-a1678

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Near midplane scintillator-based fast ion loss detector on DIII-D

Autor: R. K. Fisher, X. Chen, William Heidbrink, M. A. Van Zeeland, M. Garcia-Munoz, J. A. Chavez, D. C. Pace

Publikováno v: Chen, X; Fisher, RK; Pace, DC; García-Muñoz, M; Chavez, JA; Heidbrink, WW; et al.(2012). Near midplane scintillator-based fast ion loss detector on DIII-D. Review of Scientific Instruments, 83(10). doi: 10.1063/1.4732063. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/79v6z1q9
idUS. Depósito de Investigación de la Universidad de Sevilla
instname
idUS: Depósito de Investigación de la Universidad de Sevilla
Universidad de Sevilla (US)

A new scintillator-based fast-ion loss detector (FILD) installed near the outer midplane of the plasma has been commissioned on DIII-D. This detector successfully measures coherent fast ion losses produced by fast-ion driven instabilities (≤500 kHz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::521c12c62d1ed6a381d7c7629d79717f
http://www.escholarship.org/uc/item/79v6z1q9

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Neutron images recorded with high-resolution bubble detectors

Autor: Paul A. Jaanimagi, L. Disdier, A. Rouyer, T. C. Sangster, J.-L. Bourgade, R. A. Lerche, R. K. Fisher, N. Izumi

Publikováno v: Review of Scientific Instruments. 74:1709-1712

Neutron images have been successfully recorded with “gel-type bubble detectors.” 14 MeV fusion neutrons emitted from laser-irradiated inertial confinement fusion targets formed coded images in proof-of-principle experiments conducted at the OMEGA

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e642fdc847c4bf077a30fddc16e09144
https://doi.org/10.1063/1.1534393

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High-resolution neutron imaging of laser fusion targets using bubble detectors

Autor: L. Disdier, A. Rouyer, N. Izumi, Richard B. Stephens, Paul A. Jaanimagi, R. K. Fisher, J. L. Bourgade, T. C. Sangster, R. A. Lerche

Publikováno v: Physics of Plasmas. 9:2182-2185

The results of proof-of-principle neutron imaging experiments using bubble detectors are reported. Bubble detectors, which detect neutrons with a spatial resolution as small as 5 μ, were used to image the neutrons from laser-driven compressed deuter

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d6d79ba5b2fa12e3af8cd81944f778e4
https://doi.org/10.1063/1.1456931

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Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector

Autor: M. A. Van Zeeland, David Pace, R.M. Pipes, R. K. Fisher

Publikováno v: The Review of scientific instruments. 85(11)

New phase space mapping and uncertainty analysis of energetic ion loss data in the DIII-D tokamak provides experimental results that serve as valuable constraints in first-principles simulations of energetic ion transport. Beam ion losses are measure

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9165baa7a93919f8552f7c0846062e67
https://pubmed.ncbi.nlm.nih.gov/25430254

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Modulation of prompt fast-ion loss by applied n=2 fields in the DIII-D tokamak

Autor: Jeremy Hanson, William Heidbrink, X. Chen, M. A. Van Zeeland, D.M. Orlov, R. K. Fisher, Nathaniel Ferraro, M.J. Lanctot, G. J. Kramer, R.A. Moyer, David Pace, M. Garcia-Munoz, Todd Evans, Raffi Nazikian, L.L. Lao

Publikováno v: Plasma Physics and Controlled Fusion
idUS: Depósito de Investigación de la Universidad de Sevilla
Universidad de Sevilla (US)
idUS. Depósito de Investigación de la Universidad de Sevilla
instname

Energy and pitch angle resolved measurements of escaping neutral beam ions (E approximate to 80 keV) have been made during DIII-D L-mode discharges with applied, slowly rotating, n = 2 magnetic perturbations. Data from separate scintillator detectors

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a86b376e5b7ea69a6606c2a74ffa3469
https://hdl.handle.net/11858/00-001M-0000-0019-C11F-9

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Enhanced localized energetic ion losses resulting from first-orbit linear and non-linear interactions with Alfvén eigenmodes in DIII-D

Autor: Xin Chen, R. K. Fisher, M. A. Van Zeeland, G. J. Kramer, Mario Podesta, David Pace, Max E Austin, Long Zeng, C.C. Petty, Raffi Nazikian, William Heidbrink, Brian Grierson

Publikováno v: Chen, X; Heidbrink, WW; Kramer, GJ; Van Zeeland, MA; Pace, DC; Petty, CC; et al.(2014). Enhanced localized energetic ion losses resulting from first-orbit linear and non-linear interactions with Alfvén eigenmodes in DIII-D. Physics of Plasmas, 21(8). doi: 10.1063/1.4891442. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/27f6p3mg

Two key insights into interactions between Alfvén eigenmodes (AEs) and energetic particles in the plasma core are gained from measurements and modeling of first-orbit beam-ion loss in DIII-D. First, the neutral beam-ion first-orbit losses are enhanc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e2a7129c2c5a1599fb66516a405b93a
http://www.escholarship.org/uc/item/27f6p3mg

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