title: Spatiotemporal characterization of single-order high harmonic pulses from time-compensated toroidal-grating monochromator.
abstract: Extreme ultraviolet (XUV) single-order high harmonic pulses with 10(6) photons/pulse were separated from multiple harmonic orders by a time-compensated toroidal-grating monochromator consisting of a pair of toroidal gratings. The first grating separates the harmonic order and the second one compensates for the pulse-front tilt. The center photon energies were tunable between 42 and 23 eV. The separated single harmonic pulses were spatially and temporally characterized as having a spot size of 58 +/- 3 microm at the focus, with a shortest pulse duration of 47 +/- 2 fs. The developed XUV light source is versatile for application to time- and space-resolved spectroscopy.
authors.affiliation: Department of Applied Physics, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo 060-8628, Japan.
authors.forename: Motohiko
authors.initials: M
authors.lastname: Ito
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Kataoka
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Okamoto
authors.forename: Mikio
authors.initials: M
authors.lastname: Yamashita
authors.forename: Taro
authors.initials: T
authors.lastname: Sekikawa
mesh_terms: D003116:Color; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D012031:Refractometry / Q000295:instrumentation*; D014466:Ultraviolet Rays