Higher order light is reduced by a grazing angle mirror low pass filter installed immediately downstream from the monochromator while stray light is reduced through the use of baffles and thin film filters. Also included in the line is a differential pumping section that permits gas phase and ...
The experimental observation of FEL efficiency enhancement using a tapered undulator in a single-pass seeded FEL at the NSLS SDL is reported. The last 2.5 m of the 10 m NISUS undulator was linearly tapered so that the magnetic field strength at the end of the undulator was reduced by 5%. ...
For an average electron current of 1A distributed in three beam bunches, the small signal gain per pass (relative enhancement of the radiation intensity per electron bunch pass through the undulator) is calculated to be approximately 10%. 展开 ...
Hi-pass filter Slit Mirrors = secondary source or pinhole ½ Slit WB Stop Shutter White beam (WB) Power- reducing aperture Pink beam 12 mrad 13 Conceptual Design-Optical Layout Simplified version of the optical layout –Undulator • Future upgrade to tandem devices (rather than canted) ...
Fluorescent screens with their optics and cameras were used to measure transverse beam profile and position in single-pass mode. A beam image is registered by a CCD camera GC1290. The thickness of the Cerium-doped Yttrium Aluminum Garnet (YAG:Ce) plate of the screens is 0.1 mm. The plates...
For an average electron current of 1A distributed in three beam bunches, the small signal gain per pass (relative enhancement of the radiation intensity per electron bunch pass through the undulator) is calculated to be approximately 10%. (ERA citation 06:017291) 展开 ...