| Автор | L.J. Perkins |
| Автор | B.G. Logan |
| Автор | M.D. Rosen |
| Автор | M.D. Perry |
| Автор | T. Diaz de la Rubia |
| Автор | N.M. Ghoniem |
| Автор | T. Ditmire |
| Автор | P.T. Springer |
| Автор | S.C. Wilks |
| Дата выпуска | 2000-01-01 |
| dc.description | The application of fast pulse, high intensity lasers to drive low cost DT point neutron sources for fusion materials testing at high flux/fluence is investigated. At present, high power bench-top lasers with intensities of 10<sup>18</sup>W/cm<sup>2</sup> are routinely employed and systems capable of ≥ 10<sup>21</sup> W/cm<sup>2</sup> are becoming available. These potentially offer sufficient energy density for efficient neutron production in DT targets with dimensions of around 100 μm. Two different target concepts are analysed - a hot ion, beam-target system and an exploding pusher target system - and neutron emission rates are evaluated as a function of laser and target conditions. Compared with conventional beam-target neutron sources with steady state liquid cooling, the driver energy here is removed by sacrificial vaporization of a small target spot. The resulting small source volumes offer the potential for a low cost, high flux source of 14 MeV neutrons at close coupled, micro (≤ 1 mm) test specimens. In particular, it is shown that a laser driven target with ∼100 J/pulse at 100 Hz (i.e. ∼10 kW average power) and laser irradiances in the range Iλ<sup>2</sup>∼10<sup>17</sup>-10<sup>19</sup> W μm<sup>2</sup>/cm<sup>2</sup> could produce primary, uncollided neutron fluxes at the test specimen in the 10<sup>14</sup>-10<sup>15</sup> n cm<sup>-2</sup> s<sup>-2</sup> range. While focusing on the laser-plasma interaction physics and resulting neutron production, the materials science required to validate computational damage models utilizing ≥ 100 dpa irradiation of such specimens is also examined; this may provide a multiscale predictive capability for the behaviour of engineering scale components in fusion reactor applications. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The investigation of high intensity laser driven micro neutron sources for fusion materials research at high fluence |
| Тип | paper |
| DOI | 10.1088/0029-5515/40/1/301 |
| Electronic ISSN | 1741-4326 |
| Print ISSN | 0029-5515 |
| Журнал | Nuclear Fusion |
| Том | 40 |
| Первая страница | 1 |
| Последняя страница | 19 |
| Аффилиация | L.J. Perkins; Lawrence Livermore National Laboratory, Livermore, California, United States of America |
| Аффилиация | B.G. Logan; Lawrence Livermore National Laboratory, Livermore, California, United States of America |
| Аффилиация | M.D. Rosen; Lawrence Livermore National Laboratory, Livermore, California, United States of America |
| Аффилиация | M.D. Perry; Lawrence Livermore National Laboratory, Livermore, California, United States of America |
| Аффилиация | T. Diaz de la Rubia; Lawrence Livermore National Laboratory, Livermore, California, United States of America |
| Аффилиация | N.M. Ghoniem; Lawrence Livermore National Laboratory, Livermore, California, United States of America |
| Аффилиация | T. Ditmire; Lawrence Livermore National Laboratory, Livermore, California, United States of America |
| Аффилиация | P.T. Springer; Lawrence Livermore National Laboratory, Livermore, California, United States of America |
| Аффилиация | S.C. Wilks; Lawrence Livermore National Laboratory, Livermore, California, United States of America |
| Выпуск | 1 |
