SLAC, Menlo Park, California, USA
ESS, Lund, Sweden
The 5MW European Spallation Source (ESS) is a long pulsed source based on a high power superconducting LINAC. In order to achieve this high level of performance, the beam position measurement system needs to measure the beam position, phase and intensity in all foreseen beam modes with a pulse rate of 14 Hz, duration of 2.86 ms and amplitude ranging form 5 mA to 62.5 mA. We have designed a general purpose Beam Position Monitor (BPM) front-end electronics that has a dynamic range of 70dB. The front-end uses the MicroTCA (Micro Telecommunication Computing Architecture) for physics platform that consists of a 16-bit 125 MSPS ADC module (SIS8300L/2 from Struck) that uses the Zone 3 A1.1 classification for the RTM. This paper will discuss the design of this new RTM that includes eight channels of super-heterodyne receivers, two channels of DC-coupled inputs to measure klystron voltage and current, one vector modulator that modulates the LLRF output. The RTM communicates with the AMC FPGA using a QSPI interface over the zone 3 connection.
