TY - CPAPER AU - Simon, C.S. AU - Almalki, M.H. AU - Bellego, V. AU - Forck, P. AU - Kaufmann, W. AU - Sieber, T. TI - Numerical Calculations for the FAIR Proton Linac BPMs J2 - Proc. of IBIC2014 AB - Fourteen Beam Position Monitors (BPMs) will be installed along the FAIR Proton LINAC. These monitors will be used to determine the beam position, the relative beam current and the mean beam energy by time of flight (TOF). A capacitive button type pickup was chosen for its easy mechanical realization and for the short insertion length which is important for the four BPMs locations of the inter-tank sections between the CH-cavities. Depending on the location, the BPM design has to be optimized, taking into account an energy range from 3 MeV to 70 MeV, limited space for installation and a 30 mm or 50 mm beam pipe aperture. This paper reports wake field numerical simulations performed by the code CST PARTICLE STUDIO to design and characterize the BPMs. Time of response of monitors are presented and results of calculations for various pickup-geometries are discussed taking into account different beam velocities. PB - JACoW CY - Geneva, Switzerland SP - 303 EP - 306 KW - linac KW - simulation KW - proton KW - pick-up KW - vacuum DA - 2014/10 PY - 2014 SN - 978-3-95450-141-0 UR - http://jacow.org/IBIC2014/papers/tupf04.pdf ER -