Results 51 to 60 of about 50,113 (163)

Particle Acceleration in Relativistic Alfvénic Turbulence

open access: yesThe Astrophysical Journal
Strong magnetically dominated Alfvénic turbulence is an efficient engine of nonthermal particle acceleration in a relativistic collisionless plasma.
Cristian Vega   +2 more
doaj   +1 more source

Kinetic Simulations of Particle Acceleration in Relativistic Perpendicular Electron–Positron Shocks with Proton Admixture

open access: yesThe Astrophysical Journal
Particle acceleration in relativistic shocks of electron–positron plasmas with proton admixture is investigated through two-dimensional particle-in-cell simulations. The upstream plasma, with a bulk Lorentz factor of 10 and a magnetization parameter of 0.
Huan Yu, Qi Xia, Jun Fang
doaj   +1 more source

Velocity Model of Abrasive Water Jet Based on the Bisection Method and Iterative Algorithm

open access: yes工程科学与技术, 2018
In order to solve the problems,that force analysis is not comprehensive and the results cannot reflect the change of key parameters,such as particle acceleration,drag coefficient and Reynolds number,exist in the existing velocity models of pre-mixed ...
Wenfeng ZHANG   +3 more
doaj  

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

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   +1 more source

The Role of Three-dimensional Effects on Ion Injection and Acceleration in Perpendicular Shocks

open access: yesThe Astrophysical Journal
Understanding the conditions that enable particle acceleration at nonrelativistic collisionless shocks is essential to unveil the origin of cosmic rays.
Luca Orusa   +3 more
doaj   +1 more source

Double Power-law Formation by Sequential Particle Acceleration

open access: yesThe Astrophysical Journal
Spectral double power laws are common in solar high-energy phenomena such as flares and interplanetary energetic-electron events. However, the physical mechanism that produces the changes in power-law index within a single spectrum is unclear.
S. E. Guidoni   +3 more
doaj   +1 more source

Synchrotron-limited Particle Acceleration in Relativistic Shearing Flows

open access: yesThe Astrophysical Journal
Fermi-type shear particle acceleration is a promising mechanism for sustaining ultrarelativistic particles along the kiloparsec scale jets in active galactic nuclei.
Frank M. Rieger, Peter Duffy
doaj   +1 more source

Laser-Induced Linear-Field Particle Acceleration in Free Space. [PDF]

open access: yesSci Rep, 2017
Wong LJ   +8 more
europepmc   +1 more source

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