*Ab Initio* Studies on the Stopping Power of Warm Dense Matter with Time-Dependent Orbital-Free Density Functional Theory

## Abstract

Here, electronic transport properties of warm dense matter, such as electrical/thermal conductivities and nonadiabatic stopping power, are of particular interest to geophysics, planetary science, astrophysics, and inertial confinement fusion (ICF). One example is the α-particle stopping power of dense deuterium–tritium (DT) plasmas, which must be precisely known for current small-margin ICF target designs to ignite. We have developed a time-dependent orbital-free density functional theory (TD-OF-DFT) method for *ab initio* investigations of the charged-particle stopping power of warm dense matter. Our current dependent TD-OF-DFT calculations have reproduced the recently well-characterized stopping power experiment in warm dense beryllium. Forα-particle stopping in warm and solid-density DT plasmas, the *ab initio* TD-OF-DFT simulations show a lower stopping power up to ~25% in comparison with two stopping-power models widely used in the high-energy-density physics community.

- Authors:

- Univ. of Rochester, Rochester, NY (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

- Publication Date:

- Research Org.:
- Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)

- Contributing Org.:
- Laboratory for Laser Energetics, University of Rochester

- OSTI Identifier:
- 1479956

- Alternate Identifier(s):
- OSTI ID: 1475096; OSTI ID: 1476999

- Report Number(s):
- 2018-62, 1-438, 2-396; LA-UR-18-23762

Journal ID: ISSN 0031-9007; PRLTAO; 2018-62, 1438, 2396

- Grant/Contract Number:
- NA0001944; AC52-06NA25396

- Resource Type:
- Accepted Manuscript

- Journal Name:
- Physical Review Letters

- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 14; Journal ID: ISSN 0031-9007

- Publisher:
- American Physical Society (APS)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

### Citation Formats

```
Ding, Y. H., White, A. J., Hu, S. X., Certik, O., and Collins, L. A. Ab Initio Studies on the Stopping Power of Warm Dense Matter with Time-Dependent Orbital-Free Density Functional Theory. United States: N. p., 2018.
Web. doi:10.1103/PhysRevLett.121.145001.
```

```
Ding, Y. H., White, A. J., Hu, S. X., Certik, O., & Collins, L. A. Ab Initio Studies on the Stopping Power of Warm Dense Matter with Time-Dependent Orbital-Free Density Functional Theory. United States. doi:10.1103/PhysRevLett.121.145001.
```

```
Ding, Y. H., White, A. J., Hu, S. X., Certik, O., and Collins, L. A. Mon .
"Ab Initio Studies on the Stopping Power of Warm Dense Matter with Time-Dependent Orbital-Free Density Functional Theory". United States. doi:10.1103/PhysRevLett.121.145001. https://www.osti.gov/servlets/purl/1479956.
```

```
@article{osti_1479956,
```

title = {Ab Initio Studies on the Stopping Power of Warm Dense Matter with Time-Dependent Orbital-Free Density Functional Theory},

author = {Ding, Y. H. and White, A. J. and Hu, S. X. and Certik, O. and Collins, L. A.},

abstractNote = {Here, electronic transport properties of warm dense matter, such as electrical/thermal conductivities and nonadiabatic stopping power, are of particular interest to geophysics, planetary science, astrophysics, and inertial confinement fusion (ICF). One example is the α-particle stopping power of dense deuterium–tritium (DT) plasmas, which must be precisely known for current small-margin ICF target designs to ignite. We have developed a time-dependent orbital-free density functional theory (TD-OF-DFT) method for ab initio investigations of the charged-particle stopping power of warm dense matter. Our current dependent TD-OF-DFT calculations have reproduced the recently well-characterized stopping power experiment in warm dense beryllium. Forα-particle stopping in warm and solid-density DT plasmas, the ab initio TD-OF-DFT simulations show a lower stopping power up to ~25% in comparison with two stopping-power models widely used in the high-energy-density physics community.},

doi = {10.1103/PhysRevLett.121.145001},

journal = {Physical Review Letters},

number = 14,

volume = 121,

place = {United States},

year = {2018},

month = {10}

}

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