Zobrazeno 1 - 10
of 116
pro vyhledávání: '"N. J. Peacock"'
Publikováno v:
Astronomy & Astrophysics. 416:765-773
The inclusion of collisional rates for He-like Fe and Ca ions is discussed with reference to the analysis of solar flare Fe XXV and Ca XIX line emission, particularly from the Yohkoh Bragg Crystal Spectrometer (BCS). The new data are a slight improve
Autor:
M. R. Tarbutt, J. Dunn, I. H. Coffey, N. J. Peacock, R. Barnsley, I. M. Melnick, N. Nelms, J. A. Rainnie
Publikováno v:
Review of Scientific Instruments. 74:2388-2408
A family of Johann configuration curved crystal spectrometers has been designed to share the basic engineering features of compactness, modularity, facility of alignment and focus, and incorporation of solid-state charge coupled device detector array
Wavelength measurements of the satellite transitions to then= 2 resonance lines of helium-like argon
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 34:3979-3991
The wavelengths of the 1s2s2p-1s22s and 1s2p2-1s22p transitions in Ar15+ have been measured using a crystal spectrometer and an electron beam ion trap. These spectral lines are satellites to the n = 2 resonance lines of He-like Ar16+ and play an impo
Publikováno v:
Nuclear Fusion. 41:31-46
Results of particle transport analysis are presented for both low and high charge impurity species in JET optimized shear plasmas. The impurity content in the plasma centre is sensitive to the strength of the internal transport barrier. In a strong t
Autor:
N. J. Peacock, R. Barnsley, J. A. Rainnie, J. D. Silver, M. R. Tarbutt, M. G. O'Mullane, David C. Crosby
Publikováno v:
Review of Scientific Instruments. 72:1250-1255
The equilibrium state in tokamak core plasmas has been studied using the relative intensities of resonance x-ray lines, for example Lyα (H-like), “w” (He-like), and “q” (Li-like) from test ions such as Ar+15, Ar+16, and Ar+17. A full spatial
Publikováno v:
Plasma physics and controlled fusion 43, 1-12 (2001). doi:10.1088/0741-3335/43/1/301
The transport of light impurity ions is investigated following neon and nitrogen gas puffing in JET ELMy H-mode. Upon achieving consistency among various ion radiation diagnostics through numerical simulations, the experimental ion transport coeffici
Autor:
K.-D. Zastrow, L. C. Ingesson, N. J. Peacock, M. G. Haines, N. C. Hawkes, M. von Hellermann, M. Romanelli, H. Chen
Publikováno v:
Physics of Plasmas. 7:4567-4572
Poloidally asymmetric distributions of nickel ions have been observed experimentally in Joint European Torus optimized shear tokamak plasmas following nickel laser injection experiments. Two types of asymmetries occur. In the first type of asymmetry,
Publikováno v:
Review of Scientific Instruments. 70:1425-1429
Plasma formation and x-ray generation efficiency of a carbon fiber Z pinch are dramatically improved by means of an optimized current prepulse. In this article results are presented of time-integrated and also time-resolved electron temperature measu
Publikováno v:
Plasma Physics and Controlled Fusion. 41:105-116
The extreme ultraviolet (XUV) spectrum of C V and C VI from the edge plasma in JET has been analysed and a collisional radiative model (CRM) is used to simulate the line emissivities. We view, in the XUV range, the scrape-off layer (SOL) during the l
Publikováno v:
Review of Scientific Instruments. 70:317-322
An empirical procedure, “LINT,” for relating emission line intensities of intrinsic impurity ions to their elemental contributions to the total, bolometric, radiation loss and the volume-averaged effective ion charge, Zeff, has been developed and