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TY - CONF AU - Eshraqi, M. AU - Bustinduy, I. AU - Celona, L. AU - Comunian, M. AU - Danared, H. AU - De Prisco, R. AU - Grespan, F. AU - Lindroos, M. AU - McGinnis, D.P. AU - Miyamoto, R. AU - Muñoz, M. AU - Møller, S.P. AU - Ponton, A. AU - Sargsyan, E. AU - Thomsen, H.D. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - The ESS Linac J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - The European Spallation Source, ESS, uses a linear accelerator to bombard the tungsten target with the high intensity protons beam for producing intense beams of neutrons. The nominal average beam power of the linac is 5~MW with a peak beam power at target of 125~MW. During last year the ESS linac was costed, and to meet the budget a few modifications were introduced to the linac design. One of the major changes is the reduction of final energy from 2.5~GeV to 2.0~GeV and therefore beam current was increased accordingly to compensate for the lower final energy. As a result the linac is designed to meet the cost objective by taking a higher risk. This paper focuses on the driving forces behind the new design, engineering and beam dynamics requirements of the design and finally on the beam dynamics performance of the linac. PB - JACoW CP - Geneva, Switzerland SP - 3320 EP - 3322 KW - linac KW - target KW - rfq KW - proton KW - quadrupole DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-THPME043 UR - http://jacow.org/ipac2014/papers/thpme043.pdf ER -