TY - CPAPER AU - Kim, H.W. 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 - Kim, Y. AU - Lee, K. AU - Miginsky, S.V. AU - Park, S. H. AU - Park, S. AU - Setiniyaz, S. AU - Vinokurov, N. TI - Comparison of Astra Simulations With Beam Parameter Measurements at the Kaeri Ultrashort Pulse Facility J2 - Proc. of FEL2015 AB - An RF-photogun-based linear accelerator for ultra-short electron beam generation is under construction at Korea Atomic Energy Research Institute (KAERI). This facility are mainly composed of an 1.5 cell S-band (2856 MHz) RF gun, a travelling wave type linac 3 m long and 90-degree achromatic bends. The emitted electron beams are accelerated in high RF field to ~ 3 MeV. The electrons can be deflected by a first bending magnet installed right after the RF gun. Each beamline has second bending magnet similar to the first one and three quadrupoles between the bending magnets. Two bending and three quadrupole magnets compose the 90-degree achromatic bend. The deflected electron beams will be used for ultrafast electron diffraction (UED) experiments. We have performed computer simulation using ASTRA code to investigate the electron beam dynamics in the system with the input data of bead tested gun electric field distribution and the magnetic fields of the magnets. We will present the simulated and experimental electron beam parameters. PB - JACoW CY - Geneva, Switzerland SP - 74 EP - 76 KW - electron KW - laser KW - simulation KW - quadrupole KW - emittance DA - 2015/12 PY - 2015 SN - 978-3-95450-134-2 DO - 10.18429/JACoW-FEL2015-MOP018 UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop018.pdf ER -