Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/55049
Title: Experimental validation of low- Z Ion-stopping formalisms around the bragg peak in high-energy-density plasmas
Authors: Frenje, J. A.
Florido, R. 
Mancini, R.
Nagayama, T.
Grabowski, P. E.
Rinderknecht, H.
Sio, H.
Zylstra, A.
Gatu Johnson, M.
Li, C. K.
Séguin, F. H.
Petrasso, R. D.
Glebov, V. Yu
Regan, S. P.
UNESCO Clasification: 2207 Física atómica y nuclear
Keywords: National Ignition Facility
T-Matrix Approximation
Heavy-Ions
Detectors
Omega
Issue Date: 2019
Publisher: 0031-9007
Journal: Physical Review Letters 
Abstract: We report on the first accurate validation of low-Z ion-stopping formalisms in the regime ranging from low-velocity ion stopping—through the Bragg peak—to high-velocity ion stopping in well-characterized high-energy-density plasmas. These measurements were executed at electron temperatures and number densities in the range of 1.4–2.8 keV and 4×1023–8×1023  cm−3, respectively. For these conditions, it is experimentally demonstrated that the Brown-Preston-Singleton formalism provides a better description of the ion stopping than other formalisms around the Bragg peak, except for the ion stopping at vi∼0.3vth, where the Brown-Preston-Singleton formalism significantly underpredicts the observation. It is postulated that the inclusion of nuclear-elastic scattering, and possibly coupled modes of the plasma ions, in the modeling of the ion-ion interaction may explain the discrepancy of ∼20% at this velocity, which would have an impact on our understanding of the alpha energy deposition and heating of the fuel ions, and thus reduce the ignition threshold in an ignition experiment.
URI: http://hdl.handle.net/10553/55049
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.122.015002
Source: Physical Review Letters [ISSN 0031-9007], v. 122 (1), (015002)
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