Optimization of the transverse projected emittance of the electron beam at PITZ

• Main Authors: Vashchenko G., Asovat G., Gross M., Hakobyan L., Isaev I., Ivanisenko Y., Khojoyan M., Krasilnikov M., Mahgoub M., Malyutin D., Oppelt A., Otevrel M., Petrosyan B., Rimjaem S., Shapovalov A., Stephan F., Richter D.
• Format: Conference or Workshop Item
• Published: 2015
• Online Access: http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84884376316&origin=inward; http://cmuir.cmu.ac.th/handle/6653943832/38700
• Institution: Chiang Mai University

High brightness electron sources for linac based free-electron lasers operating at short wavelength such as the Free-Electron Laser in Hamburg at DESY, Hamburg Site (FLASH) and the European X-Ray Laser Project XFEL (European XFEL) are characterized and optimized at the Photo Injector Test Facility at DESY, Zeuthen Site (PITZ). One of the most important parameters influencing the FEL process is the normalized transverse projected emittance of the electron beam. The major part of the experimental program at PITZ is devoted to its optimization. Detailed simulations of the present facility setup are performed for a 1 nC bunch charge in order to optimize the transverse projected emittance of the electron beam. Cathode laser pulse length and transverse spot size at the photo cathode, gun and booster accelerating gradients and their launching phases as well as the main solenoid current are optimized. Simulations results together with experimental data are presented. Copyright © 2012 by the respective authors.