scholarly journals Proton Acceleration by Very Impulsive Flare on June 3, 2012

2017 ◽  
Author(s):  
Koki Kamiya ◽  
Kiyokazu Koga ◽  
Satoshi Masada ◽  
Haruhisa Matsumoto ◽  
Yasushi Muraki ◽  
...  
Keyword(s):  
Proton Acceleration ◽  
Impulsive Flare

Effect of the electron heating transition on the proton acceleration in a strongly magnetized plasma

2019 ◽  
Vol 26 (10) ◽  
pp. 103101
Author(s):  
Chong Lv ◽  
Bao-Zhen Zhao ◽  
Feng Wan ◽  
Hong-Bo Cai ◽  
Xiang-Hao Meng ◽  
...  
Keyword(s):  
Magnetized Plasma ◽  
Electron Heating ◽  
Proton Acceleration

scholarly journals Intense proton acceleration in ultrarelativistic interaction with nanochannels

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
L. A. Gizzi ◽  
G. Cristoforetti ◽  
F. Baffigi ◽  
F. Brandi ◽  
G. D'Arrigo ◽  
...  
Keyword(s):  
Proton Acceleration

Proton acceleration from magnetized overdense plasmas

2017 ◽  
Vol 24 (1) ◽  
pp. 013112 ◽  
Author(s):  
Deep Kumar Kuri ◽  
Nilakshi Das ◽  
Kartik Patel
Keyword(s):  
Proton Acceleration

ENERGETIC PROTON ACCELERATION BY ULTRAINTENSE LASER PULSES IN INHOMOGENEOUS PLASMA TARGETS

2007 ◽  
Vol 21 (03n04) ◽  
pp. 642-646 ◽  
Author(s):  
A. ABUDUREXITI ◽  
Y. MIKADO ◽  
T. OKADA
Keyword(s):  
Laser Pulse ◽  
Inhomogeneous Plasma ◽  
Laser Pulses ◽  
Proton Acceleration ◽  
Particle In Cell ◽  
Target Plasma ◽  
Plasma Target ◽  
Experimental Process ◽  
Foil Target ◽  
Proton Bunch

Particle-in-Cell (PIC) simulations of fast particles produced by a short laser pulse with duration of 40 fs and an intensity of 1020W/cm2 interacting with a foil target are performed. The experimental process is numerically simulated by considering a triangular concave target illuminated by an ultraintense laser. We have demonstrated increased acceleration and higher proton energies for triangular concave targets. We also determined the optimum target plasma conditions for maximum proton acceleration. The results indicated that a change in the plasma target shape directly affects the degree of contraction accelerated proton bunch.

Laser-driven proton acceleration and applications: Recent results

2009 ◽  
Vol 175 (1) ◽  
pp. 105-110 ◽  
Author(s):  
M. Borghesi ◽  
T. Toncian ◽  
J. Fuchs ◽  
C. A. Cecchetti ◽  
L. Romagnani ◽  
...  
Keyword(s):  
Proton Acceleration

Investigation of longitudinal proton acceleration in exploded targets irradiated by intense short-pulse laser

2014 ◽  
Vol 21 (1) ◽  
pp. 013102 ◽  
Author(s):  
M. Gauthier ◽  
A. Lévy ◽  
E. d'Humières ◽  
M. Glesser ◽  
B. Albertazzi ◽  
...  
Keyword(s):  
Pulse Laser ◽  
Short Pulse ◽  
Proton Acceleration ◽  
Short Pulse Laser

CROSSING RESONANCES IN A NON-SCALING FFAG

2011 ◽  
Vol 26 (10n11) ◽  
pp. 1852-1864 ◽  
Author(s):  
D. TRBOJEVIC ◽  
M. BLASKIEWICZ ◽  
E. FOREST
Keyword(s):  
Cancer Therapy ◽  
Blow Up ◽  
Proton Accelerator ◽  
Fast Proton ◽  
Phase Jump ◽  
Proton Acceleration ◽  
Fixed Field ◽  
The Third ◽  
Theoretical Predictions

There are many possible applications for the non-scaling Fixed Field Alternating Gradient (NS-FFAG): accelerating non-relativistic ions, ion cancer therapy, proton drivers, accelerator driven subcritical reactors, heavy radioactive ions, recirculating linacs, and etc. They are confronted with two significant challenges: first is crossing integer resonances as the tunes vary with energy, and that the required fast acceleration has not yet been achieved in practice. An example of a small 30–250 MeV NS-FFAG proton accelerator is used to study both problems. After an introduction, the second chapter shows theoretical predictions for the emittance blow up from crossing the integer resonances. In the third part, the lattice of the ring is briefly described. The fourth chapter describes the "phase jump" a method for fast proton acceleration, while in the chapter five a six dimensional simulations of acceleration is described, ending with conclusions.

scholarly journals Transforming in-situ observations of CME-driven shock accelerated protons into the shock's reference frame.

2005 ◽  
Vol 23 (5) ◽  
pp. 1931-1941 ◽  
Author(s):  
I. M. Robinson ◽  
G. M. Simnett
Keyword(s):  
Solar Physics ◽  
Solar Energetic Particle ◽  
Transport Processes ◽  
Solar Energetic Particle Event ◽  
The Sun ◽  
Proton Acceleration ◽  
Angle Scattering ◽  
Peak Energy ◽  
In Situ Observations

Abstract. We examine the solar energetic particle event following solar activity from 14, 15 April 2001 which includes a "bump-on-the-tail" in the proton energy spectra at 0.99 AU from the Sun. We find this population was generated by a CME-driven shock which arrived at 0.99 AU around midnight 18 April. As such this population represents an excellent opportunity to study in isolation, the effects of proton acceleration by the shock. The peak energy of the bump-on-the-tail evolves to progressively lower energies as the shock approaches the observing spacecraft at the inner Lagrange point. Focusing on the evolution of this peak energy we demonstrate a technique which transforms these in-situ spectral observations into a frame of reference co-moving with the shock whilst making allowance for the effects of pitch angle scattering and focusing. The results of this transform suggest the bump-on-the-tail population was not driven by the 15 April activity but was generated or at least modulated by a CME-driven shock which left the Sun on 14 April. The existence of a bump-on-the-tail population is predicted by models in Rice et al. (2003) and Li et al. (2003) which we compare with observations and the results of our analysis in the context of both the 14 April and 15 April CMEs. We find an origin of the bump-on-the-tail at the 14 April CME-driven shock provides better agreement with these modelled predictions although some discrepancy exists as to the shock's ability to accelerate 100 MeV protons. Keywords. Solar physics, astrophysics and astronomy (Energetic particles; Flares and mass ejections) – Space plasma physics (Transport processes)

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