Source: http://aoot.osa.org/oe/abstract.cfm?uri=oe-27-6-8348
Timestamp: 2019-04-26 06:14:38+00:00

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The development of a polar-view Kirkpatrick-Baez microscope, fielded in the upper polar zone of the Shenguang-III laser fusion facility, is presented. With this microscope, the resolving power of polar-direction X-ray imaging diagnostics is improved, to the 3 ~5 μm scale. The microscope is designed for implosion asymmetry studies, with response energy points at 1.2 keV, 3.5 keV, and 8 keV. A biperiodic multilayer scheme is adopted to accommodate multiple implosion stages. We present the overall optical system design, target aiming scheme, characteristic composite imaging diagnostic experiments and initial results. The inertial-driven quasi-one-dimensional spherical implosions were observed from orthogonal directions with a convergence ratio of ~14.4. Fine features of the stagnating hot spot core are also resolved.
J. D. Lindl, P. Amendt, R. L. Berger, S. G. Glendinning, S. H. Glenzer, S. W. Haan, R. L. Kauffman, O. L. Landen, and L. J. Suter, “The physics basis for ignition using indirect-drive targets on the National Ignition Facility,” Phys. Plasmas 11(2), 339–491 (2004).
O. A. Hurricane, D. A. Callahan, D. T. Casey, P. M. Celliers, C. Cerjan, E. L. Dewald, T. R. Dittrich, T. Döppner, D. E. Hinkel, L. F. Berzak Hopkins, J. L. Kline, S. Le Pape, T. Ma, A. G. MacPhee, J. L. Milovich, A. Pak, H. S. Park, P. K. Patel, B. A. Remington, J. D. Salmonson, P. T. Springer, and R. Tommasini, “Fuel gain exceeding unity in an inertially confined fusion implosion,” Nature 506(7488), 343–348 (2014).
R. Betti and O. A. Hurricane, “Inertial-confinement fusion with lasers,” Nat. Phys. 12(5), 435–448 (2016).
S. H. Glenzer, B. J. MacGowan, P. Michel, N. B. Meezan, L. J. Suter, S. N. Dixit, J. L. Kline, G. A. Kyrala, D. K. Bradley, D. A. Callahan, E. L. Dewald, L. Divol, E. Dzenitis, M. J. Edwards, A. V. Hamza, C. A. Haynam, D. E. Hinkel, D. H. Kalantar, J. D. Kilkenny, O. L. Landen, J. D. Lindl, S. LePape, J. D. Moody, A. Nikroo, T. Parham, M. B. Schneider, R. P. J. Town, P. Wegner, K. Widmann, P. Whitman, B. K. F. Young, B. Van Wonterghem, L. J. Atherton, and E. I. Moses, “Symmetric inertial confinement fusion implosions at ultra-high laser energies,” Science 327(5970), 1228–1231 (2010).
C. K. Li, F. H. Séguin, J. A. Frenje, R. D. Petrasso, J. A. Delettrez, P. W. McKenty, T. C. Sangster, R. L. Keck, J. M. Soures, F. J. Marshall, D. D. Meyerhofer, V. N. Goncharov, J. P. Knauer, P. B. Radha, S. P. Regan, and W. Seka, “Effects of nonuniform illumination on implosion asymmetry in direct-drive inertial confinement fusion,” Phys. Rev. Lett. 92(20), 205001 (2004).
P. Michel, L. Divol, E. A. Williams, S. Weber, C. A. Thomas, D. A. Callahan, S. W. Haan, J. D. Salmonson, S. Dixit, D. E. Hinkel, M. J. Edwards, B. J. Macgowan, J. D. Lindl, S. H. Glenzer, and L. J. Suter, “Tuning the implosion symmetry of ICF targets via controlled crossed-beam energy transfer,” Phys. Rev. Lett. 102(2), 025004 (2009).
V. A. Thomas and R. J. Kares, “Drive asymmetry and the origin of turbulence in an ICF implosion,” Phys. Rev. Lett. 109(7), 075004 (2012).
M. Zhu, X. Chen, Y. Xu, H. Gao, X. Que, W. Wu, H. Liu, and Y. Xiang, “Analysis and manufacturing of ShenGuangIII facility target chamber,” Fusion Eng. Des. 89(4), 392–396 (2014).
P. Kirkpatrick and A. V. Baez, “Formation of optical images by X-rays,” J. Opt. Soc. Am. 38(9), 766–774 (1948).
Y. Li, B. Mu, Q. Xie, Y. He, Z. Chen, Z. Wang, Z. Cao, J. Dong, S. Liu, and Y. Ding, “Development of an x-ray eight-image Kirkpatrick-Baez diagnostic system for China’s laser fusion facility,” Appl. Opt. 56(12), 3311–3318 (2017).
Q. Xie, B. Mu, Y. Li, X. Wang, Q. Huang, Z. Wang, Z. Cao, J. Dong, S. Liu, and Y. Ding, “Development of high resolution dual-energy KBA microscope with large field of view for RT-instability diagnostics at SG-III facility,” Opt. Express 25(3), 2608–2617 (2017).
Y. Li, Q. Xie, Z. Chen, Q. Xin, X. Wang, B. Mu, Z. Wang, S. Liu, and Y. Ding, “Direct intensity calibration of X-ray grazing-incidence microscopes with home-lab source,” Rev. Sci. Instrum. 89(1), 013704 (2018).
R. C. Mancini, H. M. Johns, T. Joshi, D. Mayes, T. Nagayama, S. C. Hsu, J. A. Baumgaertel, J. Cobble, N. S. Krasheninnikova, P. A. Bradley, P. Hakel, T. J. Murphy, M. J. Schmitt, R. C. Shah, I. L. Tregillis, and F. J. Wysocki, “Multiple-view spectrally resolved x-ray imaging observations of polar-direct-drive implosions on OMEGA,” Phys. Plasmas 21(12), 122704 (2014).
O. L. Landen, J. Edwards, S. W. Haan, H. F. Robey, J. Milovich, B. K. Spears, S. V. Weber, D. S. Clark, J. D. Lindl, B. J. MacGowan, E. I. Moses, J. Atherton, P. A. Amendt, T. R. Boehly, D. K. Bradley, D. G. Braun, D. A. Callahan, P. M. Celliers, G. W. Collins, E. L. Dewald, L. Divol, J. A. Frenje, S. H. Glenzer, A. Hamza, B. A. Hammel, D. G. Hicks, N. Hoffman, N. Izumi, O. S. Jones, J. D. Kilkenny, R. K. Kirkwood, J. L. Kline, G. A. Kyrala, M. M. Marinak, N. Meezan, D. D. Meyerhofer, P. Michel, D. H. Munro, R. E. Olson, A. Nikroo, S. P. Regan, L. J. Suter, C. A. Thomas, and D. C. Wilson, “Capsule implosion optimization during the indirect-drive National Ignition Campaign,” Phys. Plasmas 18(5), 051002 (2011).
T. Döppner, C. A. Thomas, L. Divol, E. L. Dewald, P. M. Celliers, D. K. Bradley, D. A. Callahan, S. N. Dixit, J. A. Harte, S. M. Glenn, S. W. Haan, N. Izumi, G. A. Kyrala, G. LaCaille, J. K. Kline, W. L. Kruer, T. Ma, A. J. MacKinnon, J. M. McNaney, N. B. Meezan, H. F. Robey, J. D. Salmonson, L. J. Suter, G. B. Zimmerman, M. J. Edwards, B. J. MacGowan, J. D. Kilkenny, J. D. Lindl, B. M. Van Wonterghem, L. J. Atherton, E. I. Moses, S. H. Glenzer, and O. L. Landen, “Direct measurement of energetic electrons coupling to an imploding low-adiabat inertial confinement fusion capsule,” Phys. Rev. Lett. 108(13), 135006 (2012).
P. Volegov, C. R. Danly, D. N. Fittinghoff, G. P. Grim, N. Guler, N. Izumi, T. Ma, F. E. Merrill, A. L. Warrick, C. H. Wilde, and D. C. Wilson, “Neutron source reconstruction from pinhole imaging at National Ignition Facility,” Rev. Sci. Instrum. 85(2), 023508 (2014).
L. R. Benedetti, D. K. Bradley, S. F. Khan, N. Izumi, T. Ma, S. R. Nagel, and A. Pak, “Using multiple x-ray emission images of inertially confined implosions to identify spatial variations and estimate confinement volumes (invited),” Rev. Sci. Instrum. 89(10), 10G105 (2018).
P. L. Volegov, C. R. Danly, F. E. Merrill, R. Simpson, and C. H. Wilde, “On three-dimensional reconstruction of a neutron/x-ray source from very few two-dimensional projections,” J. Appl. Phys. 118(20), 205903 (2015).
M. Wen, I. V. Kozhevnikov, and Z. Wang, “Reflection of X-rays from a rough surface at extremely small grazing angles,” Opt. Express 23(19), 24220–24235 (2015).
D. Xu, Q. Huang, Y. Wang, P. Li, M. Wen, P. Jonnard, A. Giglia, I. V. Kozhevnikov, K. Wang, Z. Zhang, and Z. Wang, “Enhancement of soft X-ray reflectivity and interface stability in nitridated Pd/Y multilayer mirrors,” Opt. Express 23(26), 33018–33026 (2015).
Q. Huang, J. Fei, Y. Liu, P. Li, M. Wen, C. Xie, P. Jonnard, A. Giglia, Z. Zhang, K. Wang, and Z. Wang, “High reflectance Cr/V multilayer with B(4)C barrier layer for water window wavelength region,” Opt. Lett. 41(4), 701–704 (2016).
X. Yang, I. V. Kozhevnikov, Q. Huang, H. Wang, K. Sawhney, and Z. Wang, “Wideband multilayer gratings for the 17-25 nm spectral region,” Opt. Express 24(13), 15079–15092 (2016).
F. J. Marshall, M. M. Allen, J. P. Knauer, J. A. Oertel, and T. Archuleta, “A high-resolution x-ray microscope for laser-driven planar-foil experiments,” Phys. Plasmas 5(4), 1118–1124 (1998).
S. W. Smith, The Scientist and Engineer’s Guide to Digital Signal Processing (California Technical Publishing, 1997).
J. R. Rygg, O. S. Jones, J. E. Field, M. A. Barrios, L. R. Benedetti, G. W. Collins, D. C. Eder, M. J. Edwards, J. L. Kline, J. J. Kroll, O. L. Landen, T. Ma, A. Pak, J. L. Peterson, K. Raman, R. P. Town, and D. K. Bradley, “2D X-ray radiography of imploding capsules at the national ignition facility,” Phys. Rev. Lett. 112(19), 195001 (2014).
Fig. 1 Schematic of the polar-view polychromatic KB microscope.
Fig. 2 (a) Biperiodic multilayer scheme for mirror M1, M2 and M3; (b) simulated multilayer reflectivity curves for each mirror; (c) measured multilayer reflectivity curves using an X-ray diffractometer (8 keV); (d) calculated system response curves, considering double mirror reflections and geometric solid angle.
Fig. 3 Schematic of the optical binocular system (OBS) and its connection with the KB module in polar-direction diagnostics for (a) the oblique view and (b) the top view. The protective cover is removed for clarity.
Fig. 4 (a) Backlit images of a #600 gold mesh, with periodic width of ~42 μm and rib width of ~6 μm; (b) lower-noise integral image for the upper left channel with the hole moved away; (c) lineout profile along the horizontal direction; (d) the overall measured spatial resolution.
Fig. 5 Experimental configuration for composite X-ray imaging diagnostics.
Fig. 6 Stagnating hotspot self-emission X-ray images (~8 keV) obtained from (a) the polar direction and (b) the equatorial direction.
Fig. 7 Schematic of 3D reconstruction of the hot spot core using multi-axis X-ray images.
Table 1 Optical parameters of the polar-view KB microscope.
Table 2 The response energy points and multilayer recipes for each mirror substrate.
Optical parameters of the polar-view KB microscope.
The response energy points and multilayer recipes for each mirror substrate.

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