The different physical mechanisms that drive the star formation histories of giant and dwarf galaxies     

C. P. Haines  A. Gargiulo  F. La Barbera  A. Mercurio  P. Merluzzi  G. Busarello 《Monthly notices of the Royal Astronomical Society》2007,381(1):7-32

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Hard X-Ray Diagnostic of Z-Pinch Discharges     

A. Robledo-Martinez  R. Aliaga-Rossel  I.H. Mitchell  J.P. Chittenden  A.E. Dangor  M.G. Haines 《Astrophysics and Space Science》1997,256(1-2):491-497

An experimental technique for the detection and time-resolved characterisation of hard X-radiation from a Z-pinch is described. The detectors employed consist of combinations of plastic scintillators and photomultipliers tubes coupled through optical fiber. The scintillators were fitted with thick aluminium and lead filters and cross filtering is then used to obtain the energy of the X-rays. It was found that the X-rays can reach energies of up to 4 MeV, much higher than the applied voltage. The observed radiation intensity varied with the disruption time lag.  相似文献   

Review of Inertial Confinement Fusion     

M.G. Haines 《Astrophysics and Space Science》1997,256(1-2):125-139

The physics of inertial confinement fusion is reviewed. The trend to short-wavelength lasers is argued, and the distinction between direct and indirect (soft X-ray) drive is made. Key present issues include the non-linear growth of Rayleigh–Taylor (R–T) instabilities, the seeding of this instability by the initial laser imprint, the relevance of self-generated magnetic fields, and the importance of parametric instabilities (stimulated Brillouin and Raman scattering) in gas-filled hohlraums. Experiments are reviewed which explore the R–T instability in both planar and converging geometry. The employment of various optical smoothing techniques is contrasted with the overcoating of the capsule by gold coated plastic foams to reduce considerably the imprint problem. The role of spontaneously generated magnetic fields in non-symmetric plasmas is discussed. Recent hohlraum compression results are presented together with gas bag targets which replicate the long-scale-length low density plasmas expected in NIF gas filled hohlraums. The onset of first Brillouin and then Raman scattering is observed. The fast ignitor scheme is a proposal to use an intense short pulse laser to drill a hole through the coronal plasma and then, with laser excited fast electrons, create a propagating thermonuclear spark in a dense, relatively cold laser-compressed target. Some preliminary results of laser hole drilling and 2-D and 3-D PIC simulations of this and the > 10⁸ Gauss self-generated magnetic fields are presented. The proposed National Ignition Facility (NIF) is described.  相似文献   

A phase-front method - III. Acoustic waves, P- and S-waves     

A. J. Haines 《Geophysical Journal International》1984,77(1):65-103

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Delamerian Orogeny and potential foreland sedimentation: A review of age and stratigraphic constraints     

P. W. Haines  T. Flöttmann 《Australian Journal of Earth Sciences》2013,60(4):559-570

A review of available geochronology and biostratigraphy leads to the conclusion that a considerable thickness of Cambrian sedimentary rocks exposed in the Arrowie and Stansbury Basins, South Australia, was probably deposited in a foreland setting during early phases of the Delamerian Orogeny. In contrast to most previous stratigraphic correlation schemes, we consider that the pre‐tectonic Kanmantoo Group was deposited synchronously with the locally thick upper Hawker Group in essentially en echelon basins during a final phase of extensional sedimentation within the Adelaide ‘Geosyncline’. The base of the locally overlying ‘redbed package’ (base of the Billy Creek and Minlaton Formations) is interpreted as the sedimentological signature of the onset of convergent deformation and associated uplift within the Delamerian Orogen at about 522 Ma. This early ('Kangarooian') phase of the Delamerian Orogeny is interpreted as the progressive development of a coherent sigmoidal fold‐thrust belt within the combined Fleurieu‐Nackara Arcs, with locally developed high‐temperature‐low‐pressure metamorphism and granitoid intrusions dating from about 516 Ma. The ‘redbed package’ is absent from the Fleurieu‐Nackara Arc region and displays isopach, palaeocurrent and facies trends consistent with derivation from this uplifted area or from the associated flexural bulge to the west. From seismic evidence we conclude that thick foreland basin deposits are present beneath Gulf St Vincent. Late phases of the Delamerian Orogeny led to local and relatively mild deformation of the early foreland deposits.  相似文献   

Global properties of the rich cluster ABCG 209 at z∼ 0.2. Spectroscopic and photometric catalogue     

A. Mercurio  F. La Barbera  C. P. Haines  P. Merluzzi  G. Busarello  M. Capaccioli 《Monthly notices of the Royal Astronomical Society》2008,387(4):1374-1390

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Variation of Rayleigh wave group velocity dispersion and seismic heterogeneity of the Indian crust and uppermost mantle     

S. Mitra  K. Priestley  V. K. Gaur  S. S. Rai  J. Haines 《Geophysical Journal International》2006,164(1):88-98

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Seismic tomography of the Tongariro Volcanic Centre, New Zealand     

D. P. Rowlands  R. S. White  A. J. Haines 《Geophysical Journal International》2005,163(3):1180-1194

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New insights into the structure of early-type galaxies: the Photometric Plane at z∼ 0.3     

F. La Barbera  G. Covone  G. Busarello  M. Capaccioli  C. P. Haines  A. Mercurio  P. Merluzzi 《Monthly notices of the Royal Astronomical Society》2005,358(4):1116-1132

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On the production of hard X-rays in solar flares     

G. M. Simnett  M. G. Haines 《Solar physics》1990,130(1-2):253-263

The problem of producing the hard X-ray burst at the onset of solar flares may be thought of in terms of the problem of producing the non-thermal electrons which emit the X-rays via bremsstrahlung. Electron acceleration to relativistic energies without similar ion acceleration is difficult to achieve, even in an ad hoc theoretical model. Yet from global energetic considerations, it is not feasible to accelerate the electrons as a minor constituent of the total energetic particle population. Therefore, it is necessary to invoke a more sophisticated process for the electron acceleration. In this paper we describe a mechanism for achieving this via an initial acceleration of a neutralized ion beam. When such a beam impacts the chromosphere, the electrons start to scatter while the ions continue downwards, rapidly setting up an electric field which is either cancelled by the inflow of background chromospheric electrons or results in the runaway acceleration of beam electrons. In the former case the result is simply heating, whereas in the latter case much of the ion kinetic energy is transferred into electron kinetic energy. The final electron energy may be similar to the typical energy of the ions. The electrons that are accelerated are those in the neutral beam that experience an electric field greater than the critical Dreicer field. Thus there will be a low-energy cut-off to the electron spectrum which overcomes the well-known energetics problem at low energies with certain other spectral forms.  相似文献