Abstract
Longitudinal Laser Pulse Shaping for Low-Emittance Electron-Beam Generation Kiho Hyun, Chang-Mook Yim, Yong Woon Parc, Jang Ho Park and In Soo Ko Department of Physics, Pohang University of Science and Technology, Pohang 790-784 Changbum Kim and Jaehun Park Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784 (Received 21 August 2007, in nal form 30 August 2008) Several X-ray free electron laser (FEL) projects require a very low-emittance electron beam and laser pulse shaping is needed for low-emittance electron-beam generation. Especially, a uniform laser pulse shape is very e cient. We have designed a 4-pulse generator for longitudinally uniform laser pulse shaping and a cross-correlation system to diagnose the shaped pulse. In this article, we introduce a 4-pulse generator for longitudinal laser pulse shaping and a technique to make a longitudinally uniform shape. In addition, we introduce a specially designed cross-correlation system for mixed polarizations, with which we can diagnose the laser pulse. PACS numbers: 29.25.Bx
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