ATF Intrabeam Scattering Results：ATF束内散射的结果.pptVIP

ATF Intrabeam Scattering Results Measurement Method to get the Results We measured the horizontal emittance in the extraction line using 5 wire scanners. Energy spread was measured by thin screen monitor in the extraction line with large dispersion. Vertical emittance was measured by 5 wire scanners in the extraction line, laser wire and SR interferometer in the damping ring. X-SR monitor indicates consistent results on transverse emittance. Bunch length has been measured by streak camera with large statistical error. Beam lifetime measurement has evaluated the emittance ratio with some assumptions. Comparison Measurements Numerical Comparison with SAD Comparison with Simulation and Theory Measurements Measurements Numerical Comparison with SAD Numerical Comparison with SAD Comparison with Simulation and Theory Summary Novel Electron-Beam Diagnostic (Laser Wire )at St Catherine’s College, Oxford, EnglandJunji Urakawa, KEK, Japan, July 10th 2003 1. Development of laserwire beam profile monitor based on stable Compton scattering in a Fabry-Perot optical cavity. (0.1mm(rms) position stability, 5mm(rms) beam collision.) 2. Future development 3. Conclusion Ultra-low emittance electron beam is good for you. * DR2003, Jan. 27 at Daresbury Contents 1) Simple Review of the Measurement Method 2) Comparison with Simulation and Theory 3) Summary Junji Urakawa and ATF collaboration DR2003, Jan. 27 at Daresbury DR2003, Jan. 27 at Daresbury DR2003, Jan. 27 at Daresbury SR Interferometer Laser Wire in the ring Energy Spread by Screen Monitor at the Extraction Line Bunch Length by Streak Camera in the Ring DR2003, Jan. 27 at Daresbury DR2003, Jan. 27 at Daresbury DR2003, Jan. 27 at Daresbury Comparison with Simulation and Theory Vertical dispersion only, with (h)rms=5.6mm and ey0=4.0pm (Solid). Coupling dominated with k=0.33% (dashes). Coupling dominated with k=1.2%, with the Coulomb log artificially increased by a factor 1.75 (dotdash). Same as Ex. 2 but assuming