TY - CPAPER
AU - Penirschke, A.
AU - Angelovski, A.
AU - Hansli, M.
AU - Jakoby, R.
AU - Mahn, T.
TI - Development of a Modified Six-Port Discriminator for Precise Beam Position Measurements
J2 - Proc. of IBIC2014
AB - For the European XFEL, new energy beam position monitors based on planar transmission lines were designed for energy measurements in the dispersive section of bunch compressor chicanes. The EBPM consists of transversely mounted stripline pickups in a rectangular beam pipe section and a signal detection scheme which measures the phases of the pulses at the ends of the pickup*. It allows simultaneous measurements of the beam energy and arrival-time. This paper presents the development of a RF readout electronic based on a modified six-port discriminator as a low-cost alternative to the readout electronics based on the MTCA.4 platform for the EBPM. Based on the six-port, the beam position can be determined by means of the phase difference between the received signals from both ends of the transmission line pickup. The six-port discriminator is a linear passive component, first developed in the 70s for accurate measurements of complex reflection coefficients in microwave network analysis**. It typically consists of two hybrid couplers and two power dividers or one Wilkinson power divider and three -3dB hybrid couplers. For the measurement of the difference of two signals excited from a single source one of the hybrid coupler can be omitted. The advantage of the six port is the fact that accurate phase measurements can be performed at microwave and millimeter wave frequencies only by amplitude measurements. This paper shows the principle of operation, developed prototype, and first test results
PB - JACoW
CY - Geneva, Switzerland
SP - 495
EP - 499
KW - pick-up
KW - operation
KW - simulation
KW - detector
KW - electronics
DA - 2014/10
PY - 2014
SN - 978-3-95450-141-0
UR - http://jacow.org/IBIC2014/papers/wecyb1.pdf
ER -