The Institute of Physics ( IOP ) по журналам "Journal of Physics D: Applied Physics"
Отображаемые элементы 1-20 из 11206
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(1977-08-21)The initial stages of a 40 kJ theta pinch in hydrogen at 13 mTorr have been investigated using a 10.6 mu m TEA CO2 laser. Electron density profiles measured across the tube using single-fringe interferometry show two ...
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(1999-08-21)We show that the liquid crystal triphenylene derivative 2,3,6,7,10,11-hexapentyl-oxytriphenylene acts as a high-resolution electron beam resist. Using pentanol as a developer, positive behaviour was observed for electron ...
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(1975-05-11)Measurements have been made of secondary electron currents resulting from positive ion bombardment of clean (100) crystal targets of tungsten, molybdenum and vanadium, as well as polycrystalline tungsten, by a range of ...
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(1993-02-14)The ablation of polyethylene terephthalate (PET) by pulsed 157 nm radiation from a fluorine laser has been studied. Etch depth measurements give an effective absorption coefficient (ke) of (1.1-0.4+0.5)*105 cm-1 corresponding ...
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(1985-01-14)Measurements have been performed on the low-frequency, excess, noise in silicon, bipolar, npn transistors at frequencies between 10-2 Hz and 25 kHz, at temperatures between 77K and 375K and over a wide range of bias. The ...
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(1984-12-14)Measurements have been made of the excess noise in silicon. The specimens were ohmic, uniform cross-section JFET channels with no active oxide interfaces. The gate voltage was used to deplete the channel and change one ...
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(1976-09-11)20 to 50 MeV protons are used to induce K X-ray fluorescence in heavy elements. Relative cross-sections, Kbeta : Kalpha and Kalpha 2: Kalpha 1 ratios are presented, and it is suggested that protons in this energy range ...
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(1990-11-14)This paper reports new, higher precision complex permittivity measurements on double-distilled water at 25 degrees C from 65 to 75 GHz. These measurements were made with an improved instrumentation system using a variable ...
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(1996-07-14)The two-dimensional expansion of a current carrying plasma jet in the interelectrode gap of a vacuum arc with an axial magnetic field is analysed by finding the steady state solution of the fully ionized plasma in the ...
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(1998-10-07)The scattering of the thermal waves on buried small thermal resistances is theoretically studied in the framework of conductive thermal modelling of the coupling between a SThM probe and a sample. Lateral resolutions for ...
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(1998-08-07)We report on the operation of a 6 cm bore copper HyBrID laser which incorporates a high-magnification (M = 280) negative-branch confocal optical resonator and utilizes a magnetic pulse compression excitation circuit. 125 ...
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(1997-01-21)Using a high- superconducting harmonic mixer at 77 K and a phase-locking loop, a signal source (a Gunn oscillator in the 3 mm waveband) was directly phase-locked to a local oscillator for frequencies less than 1 GHz and ...
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(1980-06-14)Most ionic crystals have strong reflection bands in the far infrared. Many such crystals are also transmissive to infrared radiation. An unstable resonator that exploits these properties is described. Preliminary results ...
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(1989-05-14)It is shown that a basic physical model of a plasma column sustained by a weakly damped surface wave (SW) can be formulated by combining Maxwell's equations for a SW propagating along a radially homogeneous plasma with a ...
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(1997-10-21)In support of studies to determine cross sections in ionizing gases using swarm techniques, we have developed a set of statistically accurate transport parameters for a non-conservative model gas using Monte Carlo simulation. ...
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(1974-09-21)An analysis of the role of primary spherical aberration in governing the intensity distribution of a focused laser beam has been confirmed by recording the fluorescence caused by the passage through a dye solution of ...
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(1975-02-01)The existence of a cylindrically symmetric magnetic field is demonstrated for which the chromatic aberration and the spherical aberration of an electron beam are independent of the order of the focus.
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(1999-06-07)For atomistic simulation of vacancy-assisted dopant diffusion in silicon one needs details of the dopant-vacancy interaction, i.e. the potential as a functional of dopant-vacancy separations. In this paper, we present a ...
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(1993-08-14)The work function of an Ir(001) surface coated with a Cs overlayer is investigated by using the jellium sphere/slab model containing three layers of Ir slab, and a work function versus coverage curve much closer to the ...
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(1989-04-14)A crystalline quartz plate oriented at Brewster's angle was inserted into the resonator of a CW He-Se+ laser as a birefringent filter. By rotation of the plate in its surface plane, the laser was tuned to 31 established ...
Отображаемые элементы 1-20 из 11206