10 February 2009 Simultaneous measurement of imploded core and heating laser injection by using x-ray framing camera
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Proceedings Volume 7126, 28th International Congress on High-Speed Imaging and Photonics; 71261K (2009) https://doi.org/10.1117/12.822039
Event: 28th International Congress on High-Speed Imaging and Photonics, 2008, Canberra, Australia
Abstract
In fast ignition experiment, it is important for effective heating of imploded core to control the injection time of heating laser synchronized with imploded core formation. However, it is difficult to measure the imploded core and heating laser injection at the same time. In this paper, we propose the simultaneous measurement using X-ray framing camera (XFC). In implosion experiment without heating laser, we observed only 2D thermal X-ray images of imploded core. On the other hand, in implosion experiments with heating laser, not only 2D X-ray images but also bright zones were observed on striplines. This zone is considered to show high energy X-ray from hot electron heated by heating laser. It is considered that the heating laser injection time is estimated from the peak position of this bright X-ray intensity profile. To explain the broad X-ray intensity profile, MCP gain calculation is attempted. The calculated results agree with experimental data qualitatively. Although the detailed X-ray energy measurement is needed, it is considered that we can estimate heating laser injection time with about 10 ps resolution from the peak position of high energy X-ray intensity profile.
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Mayuko Koga, Takashi Fujiwara, Tatsuhiko Sakaiya, Myongdok Lee, Keisuke Shigemori, Hiroyuki Shiraga, Hiroshi Azechi, "Simultaneous measurement of imploded core and heating laser injection by using x-ray framing camera", Proc. SPIE 7126, 28th International Congress on High-Speed Imaging and Photonics, 71261K (10 February 2009); doi: 10.1117/12.822039; https://doi.org/10.1117/12.822039
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