First Demonstration of Improved Fusion Yield with Increased Compression through Reduced Adiabat in Inertial Confinement Fusion Experiments at the National Ignition Facility.
| Title: | First Demonstration of Improved Fusion Yield with Increased Compression through Reduced Adiabat in Inertial Confinement Fusion Experiments at the National Ignition Facility. |
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| Authors: | Hohenberger M; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Clark DS; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Humbird KD; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Pak A; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Do A; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Young CV; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Döppner T; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Kritcher AL; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Casey DT; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Allen A; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.; Baxamusa SH; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Bachmann B; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Biener J; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Bionta RM; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Braun T; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Briggs TM; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Chapman T; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Danly CR; Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA.; Dittrich TR; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Divol L; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Durocher M; Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA.; Fatherley VE; Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA.; Fehrenbach T; Diamond Materials GmbH, 79108 Freiburg, Germany.; Freeman M; Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA.; Haan SW; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Hahn KD; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Hayes S; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Hurricane OA; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Khan SF; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Kong CW; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.; Kozioziemski B; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Landen OL; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; MacGowan BJ; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; MacLaren SA; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Millot M; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Moore AS; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Nikroo A; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Nora RC; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Ralph JE; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Ratledge M; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.; Rubery MS; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Schlossberg DJ; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Selwood MP; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Stadermann M; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Stoupin S; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Trosseille C; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Weber CR; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Wild C; Diamond Materials GmbH, 79108 Freiburg, Germany.; Wilde C; Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA.; Woodworth BN; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.; Zylstra AB; Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA. |
| Source: | Physical review letters [Phys Rev Lett] 2025 Jul 18; Vol. 135 (3), pp. 035101. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: American Physical Society Country of Publication: United States NLM ID: 0401141 Publication Model: Print Cited Medium: Internet ISSN: 1079-7114 (Electronic) Linking ISSN: 00319007 NLM ISO Abbreviation: Phys Rev Lett Subsets: MEDLINE; PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: New York : American Physical Society |
| Abstract: | Recent advancements in indirect-drive inertial confinement fusion (ICF) experiments at the National Ignition Facility (NIF) have achieved a significant milestone by demonstrating target gains greater than one, yet future applications necessitate much higher target gains. One approach to achieving improved implosion performance is to pursue increased fuel compression via a lowered implosion adiabat. Experiments have been performed testing a reduced adiabat by introducing small changes to the drive laser pulse shape and the resulting shock timing for an existing implosion design at 1.9 MJ laser drive with near-ignition performance (experiment N210808). Experiments using the updated design demonstrate, for the very first time, increased compression and fusion yield in ICF implosions on the NIF by using a lower fuel adiabat, and increased compression with a reduced adiabat in high-density carbon ablators. Compared to the previously best-performing experiment with a laser energy of 1.9 MJ, these experiments exhibit increases of up to 80% and 14% in nuclear fusion yield and fuel compression, respectively, and with repeatable performance. Further, it is the only implosion design to have achieved a target gain exceeding one with a laser energy of less than 2 MJ. These findings highlight the efficacy of reduced adiabat designs in achieving higher compression and fusion yields, offering a promising pathway for future ICF applications. This Letter not only addresses a long-standing question in ICF but also paves the way for achieving higher target gains with optimized implosion strategies. |
| Entry Date(s): | Date Created: 20250804 Latest Revision: 20250804 |
| Update Code: | 20260130 |
| DOI: | 10.1103/h2ss-6zpf |
| PMID: | 40758015 |
| Database: | MEDLINE |
Journal Article