Author/Authors :
Matsui، نويسنده , , T. and Sato، نويسنده , , H. and Shimada، نويسنده , , K. and Arita، نويسنده , , M. and Senba، نويسنده , , S. and Yoshida، نويسنده , , H. and Shirasawa، نويسنده , , K. and Morita، نويسنده , , M. and Hiraya، نويسنده , , A. and Namatame، نويسنده , , H. and Taniguchi، نويسنده , , M.، نويسنده ,
Abstract :
The helical/linear undulator based beamline (BL9) with 3 m off-plane Eagle monochromator for the VUV region (4–40 eV) has been installed on a compact storage ring, HiSOR. The Rydberg series of Ar 3s3p 6np 1P1 up to n=25 has been measured. The resolving power was estimated to be >12 000 at 40 nm with the photon flux ≈9×109 photons/s. The ultimate resolving power was obtained from the measurements of the O2 Schumann–Runge bands. The resolution derived from the deconvolution for the Voigt profile was 0.0061 nm (λ/Δλ≈30 000) in the 180 nm wavelength range.
