Scientific Results

Bremsstrahlung cannon design for shock ignition relevant regime

Year: 2021

Authors: Koester P., Baffigi F., Cristoforetti G., Labate L., Gizzi LA., Baton S., Koenig M., Colaïtis A., Batani D., Casner A., Raffestin D., Tentori A., Trela J., Rousseaux C., Boutoux G., Brygoo S., Jacquet L., Reverdin C., Le Bel E., Le-Deroff L., Theobald W., Shigemori K.

Autors Affiliation: 1 Intense Laser Irradiation Laboratory, Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy
2 Laboratoire pour l’Utilisation des Lasers Intenses, LULI, CNRS-Ecole Polytechnique-CEA-Sorbonne Universités, UMR 7605, F-91128 Palaiseau, France
3 Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, F-33405 Talence, France
4 Commissariat á l’energie Atomique et aux Énergies Alternatives, CEA, Direction des Applications Militaires, DAM, Île-de-France, F-91297 Arpajon, France
5 Commissariat á l’energie Atomique et aux Énergies Alternatives, CEA, Direction des Applications Militaires, DAM, Centre d’études Scientifiques et Techniques d’Aquitaine, CESTA, F-33114 Le Barp, France
6 Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
7 Institute of Laser Engineering, University of Osaka, Osaka 565-0871, Japan

Abstract: We report on the optimization of a BremsStrahlung Cannon (BSC) design for the investigation of laser-driven fast electron populations in a shock ignition relevant experimental campaign at the Laser Megajoule-PETawatt Aquitaine Laser facility. In this regime with laser intensities of 1015 W/cm2–1016 W/cm2, fast electrons with energies ≤100 keV are expected to be generated through Stimulated Raman Scattering (SRS) and Two Plasmon Decay (TPD) instabilities. The main purpose of the BSC in our experiment is to identify the contribution to x-ray emission from bremsstrahlung of fast electrons originating from SRS and TPD, with expected temperatures of 40 keV and 95 keV, respectively. Data analysis and reconstruction of the distributions of x-ray photons incident on the BSC are described.

Journal/Review: REVIEW OF SCIENTIFIC INSTRUMENTS

Volume: 92      Pages from: 013501  to: 013501

KeyWords: Laser-Plasma Interaction, Hot Electron generation, inertial confinement fusion
DOI: https://doi.org/10.1063/5.0022030

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