Betatron radiation emitted during the direct laser acceleration of electrons in underdense plasmas

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F25%3A00648097" target="_blank" >RIV/61389021:_____/25:00648097 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1361-6587/adf50b" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6587/adf50b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6587/adf50b" target="_blank" >10.1088/1361-6587/adf50b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Betatron radiation emitted during the direct laser acceleration of electrons in underdense plasmas

Popis výsledku v původním jazyce

Relativistic laser pulses can accelerate electrons up to energies of several GeV during their interaction with gaseous targets through the direct laser acceleration (DLA) mechanism. While the electrons are accelerated to high energies, they oscillate transversely to the laser propagation direction, emitting radiation. We demonstrate using particle-in-cell (PIC) simulations that the high accelerated electron charge enables DLA sources to emit ∼ 10 10 photons/0.1% bandwidth (BW) at energies of hundreds of MeV when interacting with multi-petawatt (PW) laser pulses. We provide an analytical estimate of the expected critical frequency for the DLA betatron spectrum which is in strong agreement with PIC simulations. We also show that using gas jets of low density ( ∼ 10 19 cm⁻³) is beneficial for the brightness of the source, since low plasma density produces collimated radiation. If the laser pulse is focused to an optimal spot size that results in the highest cut-off energies, the conversion efficiency from laser to radiation can reach up to a few percent, which makes DLA a promising high-brilliance source of gamma-ray radiation.

Název v anglickém jazyce

Betatron radiation emitted during the direct laser acceleration of electrons in underdense plasmas

Popis výsledku anglicky

Relativistic laser pulses can accelerate electrons up to energies of several GeV during their interaction with gaseous targets through the direct laser acceleration (DLA) mechanism. While the electrons are accelerated to high energies, they oscillate transversely to the laser propagation direction, emitting radiation. We demonstrate using particle-in-cell (PIC) simulations that the high accelerated electron charge enables DLA sources to emit ∼ 10 10 photons/0.1% bandwidth (BW) at energies of hundreds of MeV when interacting with multi-petawatt (PW) laser pulses. We provide an analytical estimate of the expected critical frequency for the DLA betatron spectrum which is in strong agreement with PIC simulations. We also show that using gas jets of low density ( ∼ 10 19 cm⁻³) is beneficial for the brightness of the source, since low plasma density produces collimated radiation. If the laser pulse is focused to an optimal spot size that results in the highest cut-off energies, the conversion efficiency from laser to radiation can reach up to a few percent, which makes DLA a promising high-brilliance source of gamma-ray radiation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Plasma Physics and Controlled Fusion

ISSN

0741-3335

e-ISSN

1361-6587

Svazek periodika

67

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

085019

Kód UT WoS článku

001550091600001

EID výsledku v databázi Scopus

2-s2.0-105013396171