Bremsstrahlung cannon design for shock ignition relevant regime

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

doi:10.1063/5.0022030

Bremsstrahlung cannon design for shock ignition relevant regime

Rev Sci Instrum. 2021 Jan 1;92(1):013501. doi: 10.1063/5.0022030.

Authors

P Koester¹, F Baffigi¹, G Cristoforetti¹, L Labate¹, L A Gizzi¹, S Baton², M Koenig², A Colaïtis³, D Batani³, A Casner³, D Raffestin³, A Tentori³, J Trela³, C Rousseaux⁴, G Boutoux⁴, S Brygoo⁴, L Jacquet⁴, C Reverdin⁴, E Le Bel⁵, L Le-Deroff⁵, W Theobald⁶, K Shigemori⁷

Affiliations

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.

PMID: 33514221
DOI: 10.1063/5.0022030

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.