Author Affiliations

G. Vaschenko,^1,2,3,4 F. Brizuela,¹ C. Brewer,¹ M. Grisham,¹ H. Mancini,^1,1 C. S. Menoni,¹ M. C. Marconi,¹ J. J. Rocca,¹ W. Chao,² J. A. Liddle,² E. H. Anderson,² D. T. Attwood,² A. V. Vinogradov,³ I. A. Artioukov,³ Y. P. Pershyn,⁴ and V. V. Kondratenko⁴

¹National Science Foundation Engineering Research Center for Extreme Ultraviolet Science and Technology, and Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, Colorado 80523

²National Science Foundation Engineering Research Center for Extreme Ultraviolet Science and Technology, and Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720

³P. N. Lebedev Physical Institute, Moscow 119991, Russia

⁴Department of Metal and Semiconductor Physics, National Technical University, “KhPI,” Kharkov, Ukraine

¹Permanent address, Department of Physics and Applied Mathematics, University of Navarra, Pamplona, Spain.