Figure 4
Experimental set-up for the fast shutter and CCD detector experiments performed at APS. The X-rays from the synchrotron pass first through the heat-load (millisecond) shutter, which blocks the intense X-ray beam the majority of the time to prevent damage to the focusing mirrors. From there the beam is reflected from the Kirkpatrick–Baez focusing mirrors to achieve the desired spatial resolution. The beam then passes through the fast shutter, establishing the temporal resolution of the measurement. Next, the beam hits the sample and scatters off the foil. The scattered X-rays are collected on the CCD detector, forming the diffraction pattern, and the direct beam hits the PIN diode and beamstop. At the same time, a fiber optic positioned to receive light from the reacting foil records in situ pyrometry data while a separate fiber optic positioned closer to the ignition point provides a signal for timing the experiment. |