Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Normalized intensity during the ‘knife-edge scans’ of a 250 µm-thick tantalum wire at 10.3, 10.4 and 10.5 keV. (b) Derivatives of the intensity during the knife-edge scans shown in (a). The full width at half-maximum (FWHM) represents a horizontal focal size of ∼3.5 µm.
