Experimental achievement and signatures of ignition at the National Ignition Facility.
Journal
Physical review. E
ISSN: 2470-0053
Titre abrégé: Phys Rev E
Pays: United States
ID NLM: 101676019
Informations de publication
Date de publication:
Aug 2022
Aug 2022
Historique:
received:
24
06
2022
accepted:
06
07
2022
entrez:
16
9
2022
pubmed:
17
9
2022
medline:
17
9
2022
Statut:
ppublish
Résumé
An inertial fusion implosion on the National Ignition Facility, conducted on August 8, 2021 (N210808), recently produced more than a megajoule of fusion yield and passed Lawson's criterion for ignition [Phys. Rev. Lett. 129, 075001 (2022)10.1103/PhysRevLett.129.075001]. We describe the experimental improvements that enabled N210808 and present the first experimental measurements from an igniting plasma in the laboratory. Ignition metrics like the product of hot-spot energy and pressure squared, in the absence of self-heating, increased by ∼35%, leading to record values and an enhancement from previous experiments in the hot-spot energy (∼3×), pressure (∼2×), and mass (∼2×). These results are consistent with self-heating dominating other power balance terms. The burn rate increases by an order of magnitude after peak compression, and the hot-spot conditions show clear evidence for burn propagation into the dense fuel surrounding the hot spot. These novel dynamics and thermodynamic properties have never been observed on prior inertial fusion experiments.
Identifiants
pubmed: 36109932
doi: 10.1103/PhysRevE.106.025202
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM