Automated Image Quality Optimization for Synchrotron Light Interferometers

Conference · Mon Oct 10 00:00:00 EDT 2005

OSTI ID:850522

Chevtsov, Pavel

Jefferson Lab has been using Synchrotron Light Interferometers (SLI) for real time high resolution, non-invasive measurement of electron beam energy spread in two experimental halls for over two years. An SLI is a classic device, which generates synchrotron light interference patterns by means of a double slit. The beam energy spread is calculated on the basis of the visibility (contrast) of the interference pattern produced by the SLI. The results of the calculations are sensitive to the position of the double slit with respect to the synchrotron light beam illuminating it. Even small changes of the electron beam trajectory in the accelerator can significantly distort the shape of the interference pattern and decrease the reliability of these results. To improve this situation, we developed a state machine control application, which automatically adjusts the positions of the SLI double slits and the mirrors directing light on these slits. The paper describes the main ideas implemented in this application and its performance.

• Research Organization: TJNAF (Thomas Jefferson National Accelerator Facility, Newport News, VA)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 850522
• Report Number(s): JLAB-ACO-05-430; DOE/ER/40150-3608
• Country of Publication: United States
• Language: English