Deterministic retrieval of surface waviness by means of topography with coherent X-rays.
A surface profile retrieval technique from multiple X-ray total reflection images taken at various distances with full coherent illumination is demonstrated. An experiment was performed using the 1 km-long BL29XU beamline at the SPring-8 facility, Japan. Obtained results are compared with results from the optical metrology technique (Fizeau's interferometer). Good agreement between X-ray and optical methods proves the validity of the current approach. Meanwhile, the sensitivity of the X-ray technique is several times higher than that of the standard one. This technique is well suited to the needs of characterizing grazing optics for new-generation X-ray sources.
Souvorov
A
A
SPring-8/JASRI, Kouto 1-1-1, Mikazuki, Hyogo 679-5148, Japan. souvorov@spring8.or.jp
Yabashi
M
M
Tamasaku
K
K
Ishikawa
T
T
Mori
Y
Y
Yamauchi
K
K
Yamamura
K
K
Saito
A
A