Results 21 to 30 of about 671,164 (293)

Study on Internal Strain Distribution of the High-Field Nb₃Sn Superconducting Accelerator Magnets With Homogenization Theory

open access: yesIEEE Access, 2022
To fabricate 10–16 Tesla high-field accelerator magnets, the high-Jc Nb3Sn superconductor is one of the most practical choices. However, it is a brittle material and is strain-sensitive.
Zhen Zhang, Qingjin Xu
doaj   +1 more source

New measurements of 92Mo(γ, n) and (γ, 3n) reactions using laser-driven bremsstrahlung γ-ray

open access: yesFrontiers in Physics, 2023
The flux-weighted average cross sections and isomeric ratios of 92Mo(γ, n)91m,gMo and 92Mo(γ, 3n)89Mo reactions were measured through activation methods.
D. Wu   +35 more
doaj   +1 more source

The accelerated acceleration of the universe

open access: yesJournal of Cosmology and Astroparticle Physics, 2006
We present a simple mechanism which can mimic dark energy with an equation of state w < -1 as deduced from the supernova data. We imagine that the universe is accelerating under the control of a quintessence field, which is moving up a very gently sloping potential.
Csaki, Csaba   +2 more
openaire   +2 more sources

Solar flare particle acceleration in collapsing magnetic traps [PDF]

open access: yes, 2012
Electronic redacted version excludes material for which permission has not been granted by the rights holderThe topic of this thesis is a detailed investigation of different aspects of the particle acceleration mechanisms operating in Collapsing Magnetic
Grady, Keith J.
core   +2 more sources

Vertical evolution of auroral acceleration at substorm onset [PDF]

open access: yes, 2009
This study describes the onset process of auroral substorms in connection with the vertical evolution of auroral particle acceleration, on the basis of auroral kilometric radiation (AKR) dynamics.
Morioka, A.   +17 more
core   +2 more sources

Acceleration of Material Waves in Fermi Accelerator [PDF]

open access: yesMathematical Problems in Engineering, 2009
Cold Atoms bouncing on modulated atomic mirror exhibits acceleration and dynamical localization subject to modulated strength. We explain characteristics of acceleration and define control parameters in terms of effective Planck′s constant. We show that the effective Planck′s constant plays a vital role in limiting classical‐like overall linear growth
Akram, Javed   +3 more
openaire   +2 more sources

MAXIMAL ACCELERATION OR MAXIMAL ACCELERATIONS? [PDF]

open access: yesInternational Journal of Modern Physics D, 2003
We review the arguments supporting the existence of a maximal acceleration for a massive particle and show that different values of this upper limit can be predicted in different physical situations.
openaire   +2 more sources

Acceleration Methods [PDF]

open access: yesFoundations and Trends® in Optimization, 2021
This monograph covers some recent advances in a range of acceleration techniques frequently used in convex optimization. We first use quadratic optimization problems to introduce two key families of methods, namely momentum and nested optimization schemes. They coincide in the quadratic case to form the Chebyshev method.
Alexandre d'Aspremont   +2 more
openaire   +3 more sources

2.3 J, 25 Hz Nd:YAG/sapphire composite powerchip amplifier operating at room temperature [PDF]

open access: yesEPJ Web of Conferences
We demonstrate a sub-nanosecond Joule-class room-temperature diode-pumped solid-state chip laser comprising of periodically bonded Nd:YAG and sapphire crystal plates and operating at 25 Hz, delivering the peak power over 3 GW.
Kausas Arvydas   +4 more
doaj   +1 more source

FDTD ANALYSIS OF NONLINEAR MAGNETIZED FERRITES: APPLICATION TO MODELING OF OSCILLATION FORMING IN COAXIAL LINE WITH FERRITE [PDF]

open access: yesРадиофизика и электроника, 2017
In recent years, the high-voltage pulse devices using nonlinear properties of ferrite have received more attention. For the analysis of this kind of objects, the 2D numerical modeling technology of nonlinear saturated ferrites by FDTD method has been ...
S. Yu. Karelin
doaj   +1 more source

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