TY - CPAPER AU - Setiniyaz, S. AU - Baek, I.H. AU - Chae, M.S. AU - Gudkov, B.A. AU - Han, B. AU - Jang, K.H. AU - Jeong, Y.U. AU - Kim, H.W. AU - Miginsky, S.V. AU - Nam, J.H. AU - Park, S. AU - Vinokurov, N. TI - Transverse Emittance Measurement of KAERI Linac with Thick Lens Quadrupole Scan J2 - Proc. of FEL2015 AB - The UED (Ultrafast Electron Diffraction) beamline of KAERI (Korea Atomic Energy Research Institute) WCI (World Class Institute) Center has been completed and successfully commissioned. Transverse emittance of the electron beam was measured at the entrance of the UED chamber with the quadrupole scan technique. In this technique, larger drift distance between the quad and screen is preferred because it gives better thin lens approximation. A space charge dominated beam however, will undergo emittance growth in the long drift caused by the space charge force. We suggest mitigating this growth by introducing quadrupole scan with short drift and without thin lens approximation. We shall discuss the measurement process and results. PB - JACoW CY - Geneva, Switzerland SP - 185 EP - 187 KW - emittance KW - quadrupole KW - electron KW - space-charge KW - experiment DA - 2015/12 PY - 2015 SN - 978-3-95450-134-2 DO - 10.18429/JACoW-FEL2015-MOP063 UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop063.pdf ER -