Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies
Low convergence ratio implosions (where wetted-foam layers are used to limit capsule convergence, achieving improved robustness to instability growth) and auxiliary heating (where electron beams are used to provide collisionless heating of a hotspot) are two promising techniques that are being explo...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
IOP Publishing
2023
|
| _version_ | 1797112006936887296 |
|---|---|
| author | Paddock, RW Li, TS Kim, E Lee, JJ Martin, H Ruskov, RT Hughes, S Rose, SJ Murphy, CD Scott, RHH Bingham, R Garbett, W Elisseev, VV Haines, BM Zlystra, AB Campbell, EM Thomas, CA Goffrey, T Arber, TD Aboushelbaya, R Von der Leyen, MW Wang, RHW James, AA Ouatu, I Timmis, R Howard, S Atonga, E Norreys, PA |
| author_facet | Paddock, RW Li, TS Kim, E Lee, JJ Martin, H Ruskov, RT Hughes, S Rose, SJ Murphy, CD Scott, RHH Bingham, R Garbett, W Elisseev, VV Haines, BM Zlystra, AB Campbell, EM Thomas, CA Goffrey, T Arber, TD Aboushelbaya, R Von der Leyen, MW Wang, RHW James, AA Ouatu, I Timmis, R Howard, S Atonga, E Norreys, PA |
| author_sort | Paddock, RW |
| collection | OXFORD |
| description | Low convergence ratio implosions (where wetted-foam layers are used to limit capsule convergence, achieving improved robustness to instability growth) and auxiliary heating (where electron beams are used to provide collisionless heating of a hotspot) are two promising techniques that are being explored for inertial fusion energy applications. In this paper, a new analytic study is presented to understand and predict the performance of these implosions. Firstly, conventional gain models are adapted to produce gain curves for fixed convergence ratios, which are shown to well-describe previously simulated results. Secondly, auxiliary heating is demonstrated to be well understood and interpreted through the burn-up fraction of the deuterium-tritium fuel, with the gradient of burn-up with respect to burn-averaged temperature shown to provide good qualitative predictions of the effectiveness of this technique for a given implosion. Simulations of auxiliary heating for a range of implosions are presented in support of this and demonstrate that this heating can have significant benefit for high gain implosions, being most effective when the burn-averaged temperature is between 5 and 20 keV. |
| first_indexed | 2024-03-07T08:18:20Z |
| format | Journal article |
| id | oxford-uuid:33194ee7-fcf2-44c4-af87-244232d70f9a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T08:18:20Z |
| publishDate | 2023 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:33194ee7-fcf2-44c4-af87-244232d70f9a2024-01-16T12:35:29ZEnergy gain of wetted-foam implosions with auxiliary heating for inertial fusion studiesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:33194ee7-fcf2-44c4-af87-244232d70f9aEnglishSymplectic ElementsIOP Publishing2023Paddock, RWLi, TSKim, ELee, JJMartin, HRuskov, RTHughes, SRose, SJMurphy, CDScott, RHHBingham, RGarbett, WElisseev, VVHaines, BMZlystra, ABCampbell, EMThomas, CAGoffrey, TArber, TDAboushelbaya, RVon der Leyen, MWWang, RHWJames, AAOuatu, ITimmis, RHoward, SAtonga, ENorreys, PALow convergence ratio implosions (where wetted-foam layers are used to limit capsule convergence, achieving improved robustness to instability growth) and auxiliary heating (where electron beams are used to provide collisionless heating of a hotspot) are two promising techniques that are being explored for inertial fusion energy applications. In this paper, a new analytic study is presented to understand and predict the performance of these implosions. Firstly, conventional gain models are adapted to produce gain curves for fixed convergence ratios, which are shown to well-describe previously simulated results. Secondly, auxiliary heating is demonstrated to be well understood and interpreted through the burn-up fraction of the deuterium-tritium fuel, with the gradient of burn-up with respect to burn-averaged temperature shown to provide good qualitative predictions of the effectiveness of this technique for a given implosion. Simulations of auxiliary heating for a range of implosions are presented in support of this and demonstrate that this heating can have significant benefit for high gain implosions, being most effective when the burn-averaged temperature is between 5 and 20 keV. |
| spellingShingle | Paddock, RW Li, TS Kim, E Lee, JJ Martin, H Ruskov, RT Hughes, S Rose, SJ Murphy, CD Scott, RHH Bingham, R Garbett, W Elisseev, VV Haines, BM Zlystra, AB Campbell, EM Thomas, CA Goffrey, T Arber, TD Aboushelbaya, R Von der Leyen, MW Wang, RHW James, AA Ouatu, I Timmis, R Howard, S Atonga, E Norreys, PA Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies |
| title | Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies |
| title_full | Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies |
| title_fullStr | Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies |
| title_full_unstemmed | Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies |
| title_short | Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies |
| title_sort | energy gain of wetted foam implosions with auxiliary heating for inertial fusion studies |
| work_keys_str_mv | AT paddockrw energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT lits energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT kime energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT leejj energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT martinh energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT ruskovrt energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT hughess energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT rosesj energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT murphycd energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT scottrhh energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT binghamr energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT garbettw energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT elisseevvv energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT hainesbm energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT zlystraab energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT campbellem energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT thomasca energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT goffreyt energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT arbertd energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT aboushelbayar energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT vonderleyenmw energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT wangrhw energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT jamesaa energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT ouatui energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT timmisr energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT howards energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT atongae energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies AT norreyspa energygainofwettedfoamimplosionswithauxiliaryheatingforinertialfusionstudies |