title: Focusing multiple high-order harmonics in the extreme-ultraviolet and soft-x-ray regions by a platinum-coated ellipsoidal mirror.
abstract: The focusability of multiple high-order harmonics in the extreme-ultraviolet and soft-x-ray regions is described, together with the design and performance of the ellipsoidal mirror used for this purpose. The mirror focuses intense coherent light in the spectral-region from 25 to 40 nm into a 2.4 microm spot size with a focused peak intensity of 6 x 10(13) W/cm2. The focal images indicate that a good beam profile is obtained with a near-Gaussian distribution and a beam quality factor (M2 value) as low as 2.4.
authors.affiliation: Graduate School of Science and Engineering, Saitama University, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Mashiko
authors.forename: Akira
authors.initials: A
authors.lastname: Suda
authors.forename: Katsumi
authors.initials: K
authors.lastname: Midorikawa