| Issue |
EPJ Web of Conferences
Volume 59, 2013
IFSA 2011 – Seventh International Conference on Inertial Fusion Sciences and Applications
|
|
|---|---|---|
| Article Number | 03009 | |
| Number of page(s) | 5 | |
| Section | III. Alternative Target Physics (Impact, Shock, Fast Ignition, ...) | |
| DOI | https://doi.org/10.1051/epjconf/20135903009 | |
| Published online | 15 November 2013 | |
https://doi.org/10.1051/epjconf/20135903009
Design of a cone target for fast ignition
1 Institute for Laser Technology
2 Institute of Laser Engineering, Osaka University
a e-mail: suna@ile.osaka-u.ac.jp
Published online: 15 November 2013
We propose a new type of target for the fast ignition of inertial confinement fusion. Pre-formed plasma inside a cone target can significantly reduce the energy coupling efficiency from the ultra-high intense short-pulse laser to the imploded core plasma. Also, in order to protect the tip of the cone and reduce generation of pre-formed plasma, we propose pointed shaped cone target. In our estimation, the shock traveling time can be delayed 20–30 ps by lower-Z material with larger areal density compared to the conventional gold flat tip. Also, the jet flow can sweep the blow-off plasma from the tip of the cone, and the implosion performance is not drastically affected by the existence of pointed tip. In addition, the self-generated magnetic field is generated along the boundary of cone tip and surrounding CD or DT plasma. This magnetic field can confine fast electrons and focus to the implosion core plasma. Resultant heating efficiency is improved by 30% compared to that with conventional gold flat tip.
© Owned by the authors, published by EDP Sciences, 2013
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