0.3-nm SASE-FEL at PAL

• DOI: 10.1016/j.nima.2004.04.106
• Publication Date: 2004-05-13T13:27:24Z
• Authors: J.S Oh; D.E Kim; E.S Kim; S.J Park; H.S Kang; T.Y Lee; T.Y Koo; S.S Chang; C.W Chung; S.H Nam; W Namkung
• Keywords: PAL; 0103 physical sciences; X-ray SASE; in-vacuum undulator; 0.3 nm; third-harmonic enhancement; 01 natural sciences; 7. Clean energy

Abstract Recent success in SASE-FEL experiments provides high confidence in achieving FEL radiation wavelengths as short as 0.1 nm.The SASE-XFEL requires multi-GeV electron beams with extremely low-emittance, short bunches, and long undulator systems. PAL is operating a 2.5-GeV electron linac as a full-energy injector to the PLS storage ring. With a proposed energy upgrade to 3.0 GeV and an in-vacuum undulator, PAL will be able to produce coherent X-ray radiation at wavelengths as short as 0.3 nm.This paper presents the preliminary design details for the proposed PAL-XFEL. The required undulator period is 12.5 mm with a 3-mm gap. The third harmonic enhancement technique can be used to obtain radiation wavelengths of 0.1 nm.The technical parameters related to these goals are reviewed.