Creation of a homogeneous plasma column by means of hohlraum radiation for ion-stopping measurements
| Autor: | Faik, Steffen, Tauschwitz, Anna, Basko, Mikhail M., Maruhn, Joachim A., Rosmej, Olga, Rienecker, Tim, Novikov, Vladimir G., Grushin, Alexander S. |
|---|---|
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | High Energy Density Physics 10 (2014) 47-55 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.hedp.2013.10.002 |
| Popis: | In this work, we present the results of two-dimensional radiation-hydrodynamics simulations of a hohlraum target whose outgoing radiation is used to produce a homogeneously ionized carbon plasma for ion-beam stopping measurements. The cylindrical hohlraum with gold walls is heated by a frequency-doubled ($\lambda_l = 526.5$ $\mu m$) $1.4$ $ns$ long laser pulse with the total energy of $E_l = 180$ $J$. At the laser spot, the peak matter and radiation temperatures of, respectively, $T \approx 380$ $eV$ and $T_r \approx 120$ $eV$ are observed. X-rays from the hohlraum heat the attached carbon foam with a mean density of $\rho_C = 2$ $mg/cm^3$ to a temperature of $T \approx 25$ $eV$. The simulation shows that the carbon ionization degree ($Z \approx 3.75$) and its column density stay relatively stable (within variations of about $\pm7\%$) long enough to conduct the ion-stopping measurements. Also, it is found that a special attention should be paid to the shock wave, emerging from the X-ray heated copper support plate, which at later times may significantly distort the carbon column density traversed by the fast ions. Comment: 12 pages, 12 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|