The continued evolution to lower emittance synchrotrons and smaller beam size places greater demands on X-ray beam position stability at the experimental stations. Stability in synchrotron beams at the focus is critical for reliable data collection. SLAC researchers have discovered a sensitive X-ray position detector which can be used in a feed-back loop with mirror optics to provide beam position stability at the micron level from time periods of 10Hz to diurnal time frames. It can operate in the hard X-ray range and be used where X-ray energies are scanned. It can be used with beam sizes from a couple hundred microns to tens of microns. Stanford Synchrotron Radiation Laboratory (SSRL) has rolled this detector successfully to a dozen beam lines.
Figure 1 - a Mirror Pitch Feedback Detector in use at BL7-2.
Figure 2 - the detector disassembled so the inside can be seen.