New mechanism of particle acceleration and relativistic analog of the Fermi-Ulam model

1988 ◽  
Vol 77 (1) ◽  
pp. 1110-1115 ◽  
Author(s):  
L. D. Pustyl'nikov
Keyword(s):  
Particle Acceleration ◽  
Relativistic Analog

Optimization of transient gene expression in pollen of Norway spruce (Picea abies) by particle acceleration

1994 ◽  
Vol 92 (3) ◽  
pp. 412-416 ◽  
Author(s):  
Inger Martinussen ◽  
Olavi Junttila ◽  
David Twell
Keyword(s):  
Gene Expression ◽  
Particle Acceleration ◽  
Picea Abies ◽  
Norway Spruce ◽  
Transient Gene Expression

Soybean transformation by electric discharge particle acceleration

1990 ◽  
Vol 79 (1) ◽  
pp. 210-212 ◽  
Author(s):  
Paul Christou
Keyword(s):  
Particle Acceleration ◽  
Electric Discharge ◽  
Soybean Transformation

Collective Methods of Particle Acceleration in a Plasma and in Heavy-Current Electron Beams

1972 ◽  
Vol 107 (6) ◽  
pp. 326
Author(s):  
A.A. Kolomenskii ◽  
M.S. Rabinovich ◽  
Ya.B. Fainberg
Keyword(s):  
Particle Acceleration ◽  
Electron Beams ◽  
Current Electron

scholarly journals Preformed transient gas channels for laser wakefield particle acceleration

1996 ◽  
Author(s):  
Wm Monty Wood
Keyword(s):  
Particle Acceleration ◽  
Laser Wakefield

scholarly journals Towards ultra-high gradient particle acceleration in carbon nanotubes

2020 ◽  
Vol 1596 ◽  
pp. 012028
Author(s):  
A Perera ◽  
A Bonatto ◽  
C Bontoiu ◽  
J Resta-López ◽  
V Rodin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Particle Acceleration ◽  
High Gradient

scholarly journals On particle acceleration and transport in plasmas in the Galaxy: theory and observations

2021 ◽  
Vol 87 (1) ◽  
Author(s):  
Elena Amato ◽  
Sabrina Casanova
Keyword(s):  
Particle Acceleration ◽  
Cosmic Rays ◽  
Galactic Cosmic Rays ◽  
Energetic Particles ◽  
Quality Data ◽  
Current Status ◽  
The Earth ◽  
The Galaxy ◽  
Formation And Evolution ◽  
Galaxy Assembly

Accelerated particles are ubiquitous in the Cosmos and play a fundamental role in many processes governing the evolution of the Universe at all scales, from the sub-AU scale relevant for the formation and evolution of stars and planets to the Mpc scale involved in Galaxy assembly. We reveal the presence of energetic particles in many classes of astrophysical sources thanks to their production of non-thermal radiation, and we detect them directly at the Earth as cosmic rays. In the last two decades both direct and indirect observations have provided us a wealth of new, high-quality data about cosmic rays and their interactions both in sources and during propagation, in the Galaxy and in the Solar System. Some of the new data have confirmed existing theories about particle acceleration and propagation and their interplay with the environment in which they occur. Some others have brought about interesting surprises, whose interpretation is not straightforward within the standard framework and may require a change of paradigm in terms of our ideas about the origin of cosmic rays of different species or in different energy ranges. In this article, we focus on cosmic rays of galactic origin, namely with energies below a few petaelectronvolts, where a steepening is observed in the spectrum of energetic particles detected at the Earth. We review the recent observational findings and the current status of the theory about the origin and propagation of galactic cosmic rays.

scholarly journals On the Determinant Problem for the Relativistic Boltzmann Equation

2021 ◽  
Author(s):  
James Chapman ◽  
Jin Woo Jang ◽  
Robert M. Strain
Keyword(s):  
Boltzmann Equation ◽  
Upper Bound ◽  
Numerical Study ◽  
Jacobian Determinant ◽  
Large Role ◽  
Relativistic Boltzmann Equation ◽  
Relativistic Analog ◽  
Relativistic Collision ◽  
Pointwise Limit ◽  
Open Question

AbstractThis article considers a long-outstanding open question regarding the Jacobian determinant for the relativistic Boltzmann equation in the center-of-momentum coordinates. For the Newtonian Boltzmann equation, the center-of-momentum coordinates have played a large role in the study of the Newtonian non-cutoff Boltzmann equation, in particular we mention the widely used cancellation lemma [1]. In this article we calculate specifically the very complicated Jacobian determinant, in ten variables, for the relativistic collision map from the momentum p to the post collisional momentum $$p'$$ p ′ ; specifically we calculate the determinant for $$p\mapsto u = \theta p'+\left( 1-\theta \right) p$$ p ↦ u = θ p ′ + 1 - θ p for $$\theta \in [0,1]$$ θ ∈ [ 0 , 1 ] . Afterwards we give an upper-bound for this determinant that has no singularity in both p and q variables. Next we give an example where we prove that the Jacobian goes to zero in a specific pointwise limit. We further explain the results of our numerical study which shows that the Jacobian determinant has a very large number of distinct points at which it is machine zero. This generalizes the work of Glassey-Strauss (1991) [8] and Guo-Strain (2012) [12]. These conclusions make it difficult to envision a direct relativistic analog of the Newtonian cancellation lemma in the center-of-momentum coordinates.

Acoustic particle acceleration sensors

1996 ◽  
Author(s):  
J. B. Franklin ◽  
P. J. Barry
Keyword(s):  
Particle Acceleration ◽  
Acceleration Sensors
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