Comparison of ion acceleration from nonexpanded and expanded thin foils irradiated by ultrashort petawatt laser pulse

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F19%3A00339603" target="_blank" >RIV/68407700:21340/19:00339603 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1117/12.2520278" target="_blank" >http://dx.doi.org/10.1117/12.2520278</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2520278" target="_blank" >10.1117/12.2520278</a>

Result language

angličtina

Original language name

Comparison of ion acceleration from nonexpanded and expanded thin foils irradiated by ultrashort petawatt laser pulse

Original language description

It is usually assumed that ions are accelerated most efficiently in the case of non-expanded targets irradiated by femtosecond ultraintense laser pulse, alternatively with only short scale preplasma on their front side. Here, we demonstrate that the ions in an expanded foil with near-critical density plasma before its interaction with the main petawatt pulse may be accelerated to higher energies than that from ultrathin foils. In order to investigate the mechanisms responsible for the acceleration of the most energetic ions, we used particle tracking in particle-in-cell simulations. It is demonstrated that high-energy ions originate from a small region of the depth below 1 mu m and the width about the laser focal spot size (3 4 mu m) in the case of semi-expanded target (with gradually increasing density up to the maximum density from the front side) and of a thin foil. On the other hand, the length of this region exceeds 5 mu m for the expanded target. When the laser pulse propagates through near-critical density targets, a high density electron bunch is formed and travels with the laser pulse behind the target. Behind this electron bunch, a relatively long longitudinal electric field is generated and this field accelerates ions. Longitudinal electric field can be also generated due to expanding transverse magnetic field, which is observed for the expanded target.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proc. SPIE 11037, Laser Acceleration of Electrons, Protons, and Ions V

ISBN

978-1-5106-2741-3

ISSN

0277-786X

e-ISSN

1996-756X

Number of pages

7

Pages from-to

—

Publisher name

SPIE

Place of publication

Bellingham (stát Washington)

Event location

Praha

Event date

Apr 1, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000502118100002