Results 1 to 10 of about 67,146 (302)

Particle Acceleration in Relativistic Outflows [PDF]

open access: yesSpace Science Reviews, 2012
In this review we confront the current theoretical understanding of particle acceleration at relativistic outflows with recent observational results on various source classes thought to involve such outflows, e.g. gamma-ray bursts, active galactic nuclei, and pulsar wind nebulae.
A M Bykov   +2 more
exaly   +7 more sources

Particle acceleration at magnetized, relativistic, turbulent shock fronts

open access: yesPhysical Review Research, 2023
The efficiency of particle acceleration at shock waves in relativistic, magnetized astrophysical outflows is a debated topic with far-reaching implications. Here, we study the impact of well-developed turbulence in the pre-shock plasma.
Virginia Bresci   +2 more
doaj   +2 more sources

An Introduction to Particle Acceleration in Shearing Flows

open access: yesGalaxies, 2019
Shear flows are ubiquitously present in space and astrophysical plasmas. This paper highlights the central idea of the non-thermal acceleration of charged particles in shearing flows and reviews some of the recent developments.
Frank M. Rieger
doaj   +3 more sources

Energetic spectra from semi-implicit particle-in-cell simulations of magnetic reconnection [PDF]

open access: yesScientific Reports
Astrophysical observations suggest that magnetic reconnection in relativistic plasmas plays an important role in the acceleration of energetic particles. Modeling this accurately requires numerical schemes capable of addressing large scales and realistic
K. M. Schoeffler   +4 more
doaj   +2 more sources

The cryogenic control system of BEPCII

open access: yesEPJ Techniques and Instrumentation, 2021
The BEPCII project is for upgrading the Beijing Electron Positron Collider to reach a higher luminosity. The cryogenic system has been firstly designed and deployed in BEPCII, which provides cooling capacity for SRF cavities, SCQ and SSM.
Gang Li   +8 more
doaj   +1 more source

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

Performance study of a new epoxy resin IR-3 in HTS-based high-field magnet application

open access: yesMaterials Research Express, 2022
REBCO (Rare-earth-based barium copper oxide) conductors are appropriate materials for high-field magnet applications. Vacuum impregnation using epoxy resin is a technique widely used for stable operation of superconducting coils.
Huanli Yao   +13 more
doaj   +1 more source

Machine learning enabled fast evaluation of dynamic aperture for storage ring accelerators

open access: yesNew Journal of Physics, 2022
For any storage ring-based large-scale scientific facility, one of the most important performance parameters is the dynamic aperture (DA), which measures the motion stability of charged particles in a global manner.
Jinyu Wan, Yi Jiao
doaj   +1 more source

Acceleration of Charged Particles in Astrophysical Plasmas

open access: yesFrontiers in Astronomy and Space Sciences, 2021
The origin of high-energy particles in the Universe is one of the key issues of high-energy solar physics, space science, astrophysics, and particle astrophysics.
Siming Liu, Siming Liu, J. Randy Jokipii
doaj   +1 more source

Relativistic self focusing and frequency shift of super-Gaussian laser beam in plasma

open access: yesResults in Physics, 2020
Relativistic self focusing and frequency shift of laser beam having super-Gaussian profile in space and Gaussian profile in time is studied in a plasma. The relativistic mass nonlinearity is found to cause time dependent self focusing of the laser pulse ...
Hitendra K. Malik, Lalita Devi
doaj   +1 more source

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