First bromine doped cryogenic implosion at the National Ignition Facility

Hayes, A. C.; Kyrala, G.; Gooden, M.; Wilhelmy, J. B.; Kot, L.; Volegov, P.; Wilde, C.; Haines, B.; Jungman, Gerard; Rundberg, R. S.; Wilson, D. C.; Velsko, C.; Cassata, W.; Henry, E.; Yeamans, C.; Cerjan, C.; Ma, T.; Döppner, T.; Nikroo, A.; Hurricane, O.; Callahan, D.; Hinkel, D.; Schneider, D.; Bachmann, B.; Graziani, F.; Chen, K. C.; Kong, C.; Huang, H.; Crippen, J. W.; Ratledge, M.; Rice, N. G.; Farrell, M. P.

doi:10.1063/5.0142596

First bromine doped cryogenic implosion at the National Ignition Facility

Journal Article · Thu Jul 13 00:00:00 EDT 2023 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0142596· OSTI ID:2567621

; ; ; ; Kot, L.; ; ; ; Jungman, Gerard; ; ; ; Cassata, W.; ; ; ; ; ; ; more »

We report on the first experiment dedicated to the study of nuclear reactions on dopants in a cryogenic capsule at the National Ignition Facility (NIF). This was accomplished using bromine doping in the inner layers of the CH ablator of a capsule identical to that used in the NIF shot N140520. The capsule was doped with 3 × 1016 bromine atoms. The doped capsule shot, N170730, resulted in a DT yield that was 2.6 times lower than the undoped equivalent. The Radiochemical Analysis of Gaseous Samples (RAGS) system was used to collect and detect 79Kr atoms resulting from energetic deuteron and proton ion reactions on 79Br. RAGS was also used to detect 13N produced dominantly by knock-on deuteron reactions on the 12C in the ablator. High-energy reaction-in-flight neutrons were detected via the 209Bi(n,4n)206Bi reaction, using bismuth activation foils located 50 cm outside of the target capsule. The robustness of the RAGS signals suggests that the use of nuclear reactions on dopants as diagnostics is quite feasible.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396; AC52-07NA27344

OSTI ID:: 2567621

Alternate ID(s):: OSTI ID: 2318941
OSTI ID: 2483521

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 30; ISSN 1070-664X

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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