Hot-electron-induced instability in 0.5- mu m p-channel MOSFETs patterned using synchrotron X-ray lithography

1989 ◽  
Vol 10 (7) ◽  
pp. 327-329 ◽  
Author(s):  
C.C.-H. Hsu ◽  
L.K. Wang ◽  
M.R. Wordeman ◽  
T.H. Ning
Keyword(s):  
Hot Electron ◽  
X Ray

scholarly journals Initial Results of X-ray Imaging and Energy Spectrum Measurements of Hot Electron Plasmas in RT-1

2009 ◽  
Vol 4 ◽  
pp. 050-050 ◽  
Author(s):  
Haruhiko SAITOH ◽  
Yoshihisa YANO ◽  
Tatsunori MIZUSHIMA ◽  
Junji MORIKAWA ◽  
Zensho YOSHIDA
Keyword(s):  
Energy Spectrum ◽  
Hot Electron ◽  
X Ray ◽  
Electron Plasmas ◽  
X Ray Imaging ◽  
Spectrum Measurements ◽  
Initial Results

scholarly journals Efficient hard X-ray source using femtosecond plasma at solid targets with a modified surface

2004 ◽  
Vol 22 (3) ◽  
pp. 301-306 ◽  
Author(s):  
S.A. GAVRILOV ◽  
D.M. GOLISHNIKOV ◽  
V.M. GORDIENKO ◽  
A.B. SAVEL'EV ◽  
R.V. VOLKOV
Keyword(s):  
Experimental Data ◽  
Surface Layer ◽  
Laser Pulses ◽  
Hot Electron ◽  
High Contrast ◽  
X Ray ◽  
Corrugated Surface ◽  
Fs Laser ◽  
Modified Surface ◽  
Modified Surface Layer

Recent results on constructing of an efficient hard X-ray source using solid targets irradiated by high-contrast 200-fs laser pulses with an intensity above 1016W/cm2are presented. We used different solid targets with a laser- and electrochemically modified surface layer: craters, pyramidal cavities, porous silicon, gratings. Experimental data obtained confirms that using solid targets with a corrugated surface one can achieve a prominent increase both in the efficiency of hard X-ray generation (in the quanta range 2–30 keV) and in the hot electron temperature of plasma.

scholarly journals Hot electron and x-ray production from intense laser irradiation of wavelength-scale polystyrene spheres

2007 ◽  
Vol 14 (6) ◽  
pp. 062704 ◽  
Author(s):  
H. A. Sumeruk ◽  
S. Kneip ◽  
D. R. Symes ◽  
I. V. Churina ◽  
A. V. Belolipetski ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Intense Laser ◽  
Hot Electron ◽  
Polystyrene Spheres ◽  
X Ray ◽  
Wavelength Scale

scholarly journals Hot electron refluxing in the short intense laser pulse interactions with solid targets and its influence on K-α radiation

Nukleonika ◽  
2015 ◽  
Vol 60 (2) ◽  
pp. 233-237 ◽  
Author(s):  
Vojtěch Horný ◽  
Ondřej Klimo
Keyword(s):  
Strong Electric Field ◽  
Target Material ◽  
Target Thickness ◽  
Intense Laser ◽  
Rear Side ◽  
Hot Electron ◽  
Fast Electrons ◽  
X Ray ◽  
Particle In Cell ◽  
Beam Interaction

Abstract Fast electrons created as a result of the laser beam interaction with a solid target penetrate into the target material and initialize processes leading to the generation of the characteristic X-ray K-α radiation. Due to the strong electric field induced at the rear side of a thin target the transmitted electrons are redirected back into the target. These refluxing electrons increase the K-α radiation yield, as well as the duration of the X-ray pulse and the size of the radiation emitting area. A model describing the electron refluxing was verified via particle-in-cell simulations for non-relativistic electron energies. Using this model it was confirmed that the effect of the electron refluxing on the generated X-ray radiation depends on the target thickness and the target material. A considarable increase of the number of the emitted K-α photons is observed especially for thin targets made of low-Z materials, and for higher hot electron temperatures.

scholarly journals Numerical studies on the properties of femtosecond laser plasma Kα sources

2001 ◽  
Vol 19 (1) ◽  
pp. 147-150 ◽  
Author(s):  
CH. REICH ◽  
P. GIBBON ◽  
I. USCHMANN ◽  
E. FÖRSTER
Keyword(s):  
Short Pulse ◽  
Numerical Models ◽  
X Rays ◽  
Hot Electron ◽  
X Ray ◽  
Compact Source ◽  
Electron Generation ◽  
Short Pulse Laser ◽  
Numerical Studies ◽  
Femtosecond Laser Plasma

One of the features of ultra high intensity (UHI) short pulse laser–matter interactions is the prospect of creating a cheap, compact source of hard X rays with femtosecond pulse duration. The properties of such Kα sources are studied using analytical and numerical models of hot electron generation and subsequent transport in a range of materials (Reich et al., 2000). First, we find that there is an optimum laser intensity for Kα generation from bulk targets, which scales as Z4.4. Second, we show that efficient hard X-ray pulses with durations below 100 fs can be generated at intensities of ∼1016 W/cm2.

scholarly journals Laser generated plasmas as a source for real time studies in X-ray crystal research: Part II: In search of an optimum choice of laser plasma coupling conditions

1984 ◽  
Vol 2 (2) ◽  
pp. 187-199 ◽  
Author(s):  
K. Schäfer ◽  
W. D. Zimmer
Keyword(s):  
Real Time ◽  
Laser Plasma ◽  
Electron Spectrum ◽  
Line Emission ◽  
Simplified Model ◽  
Hot Electron ◽  
Plasma Parameters ◽  
X Ray ◽  
Laser Plasmas ◽  
Plasma Coupling

For real-time diffraction experiments in X-ray crystal research a simplified model is chosen to describe laser-generated plasmas. This enables a rough estimate of the optimum laser plasma parameters necessary to maximize the line emission of highly ionized species. Furthermore, the use of the hot electron spectrum of laser plasmas to generate ultrashort Kα-emission is discussed.

scholarly journals Broad-band spectral analysis of LMXB XTE J1710−281 with Suzaku

2020 ◽  
Vol 496 (1) ◽  
pp. 197-205
Author(s):  
Prince Sharma ◽  
Rahul Sharma ◽  
Chetana Jain ◽  
Anjan Dutta
Keyword(s):  
Spectral Analysis ◽  
Broad Band ◽  
Emission Spectra ◽  
Band Spectrum ◽  
Surface Boundary ◽  
Hot Electron ◽  
Spectral Parameters ◽  
Surface Boundary Layer ◽  
X Ray ◽  
Single Temperature

ABSTRACT This work presents the broad-band time-averaged spectral analysis of neutron star (NS) low-mass X-ray binary, XTE J1710−281 by using the Suzaku archival data. The source was in a hard or an intermediate spectral state during this observation. This is the first time that a detailed spectral analysis of the persistent emission spectra of XTE J1710−281 has been done up to 30 keV with improved constraints on its spectral parameters. By simultaneously fitting the X-ray Imaging Spectrometer (0.6–9.0 keV) and the HXD-PIN (15.0–30.0 keV) data, we have modelled the persistent spectrum of the source with models comprising a soft component from accretion disc and/or NS surface/boundary layer and a hard Comptonizing component. The 0.6–30 keV continuum with neutral absorber can be described by a multicolour disc blackbody with an inner disc temperature of kTdisc = 0.28 keV, which is significantly Comptonized by the hot electron cloud with electron temperature of kTe ≈ 5 keV and described by photon index Γ = 1.86. A more complex three-component model comprising a multicolour disc blackbody ≈0.30 keV, single-temperature blackbody ≈0.65 keV, and Comptonization from the disc, partially absorbed (about 38 per cent) by an ionized absorber (log(ξ) ≈ 4) describes the broad-band spectrum equally well.

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