The Advanced Photon Source
a U.S. Department of Energy Office of Science User Facility


Beamline Layout

Beamline 4-ID-C is based on a spherical grating monochromator, designed to operate in the 400 - 3000 eV range through the use of several gratings. The enables the capability to achieve high resolving powers over this entire energy range. The basic components consist of the circularly polarizing undulator (CPU), two horizontally deflecting mirrors (Y4-30 & Y4-40), vertically focusing mirror (M3C), entrance slit, grating (SGM), movable exit slit, diagnostic chamber (DC) and Kirkpatrick-Baez (KB) refocusing mirrors.

Experimental Area

(1) I0 grid with Au evaporator. (2) Differential pump. (3) Apertures. (4) Octupole end station. (5) Movable phosphor screen. (6) 7 T end station. (7) Low field (<150 G) magnet station with low temperature (>8 K) cryostat and lens for XEOL spectroscopy. (8) Movable end station (PEEM, XPS, User).   Items in green are the beamline isolation valves.