Cold electrons acceleration in TNSA laser-generated plasma using a low-contrast fs laser

0539476 - ÚJF 2022 RIV DE eng J - Journal Article
Torrisi, L. - Cutroneo, Mariapompea - Torrisi, Alfio
Cold electrons acceleration in TNSA laser-generated plasma using a low-contrast fs laser.
Contributions to Plasma Physics. Roč. 61, č. 4 (2021), č. článku 20200097. ISSN 0863-1042. E-ISSN 1521-3986
R&D Projects: GA ČR(CZ) GBP108/12/G108; GA MŠMT LM2015056
Research Infrastructure: CANAM II - 90056
Institutional support: RVO:61389005
Keywords : electron acceleration * laser generated plasma * SiC * TNSA * ToF
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.608, year: 2021
Method of publishing: Limited access
https://doi.org/10.1002/ctpp.202000097

The fs laser facility in Bordeaux, delivering an intensity of 10(18) W/cm(2) at normal incidence on thin foils, has been used to induce forward electron and ion acceleration in target-normal-sheath-acceleration (TNSA) regime. Micrometric thin foils with different composition, thickness, and electron density, were prepared to promote the charge particle acceleration in the forward direction. The plasma electron and ion emission monitoring were performed on-line using SiC semiconductor detectors in time-of-flight (TOF) configuration and gaf-chromics films both covered by thin absorber filters. The experiment has permitted to accelerate electrons and protons. A special attention was placed to detect relativistic hot electrons escaping from the plasma and cold electrons returning to the target position. The electron energies of the order of 100 keV and of about 1 keV were detected as representative of hot and cold electrons, respectively. A high cold electron contribution was measured using low-contrast fs laser, while it is less evident using high-contrast fs lasers. The charge particle acceleration depends on the laser parameters, irradiation conditions, and target properties, as will be presented and discussed.
Permanent Link: http://hdl.handle.net/11104/0319557