FBCT fast intensity measurement using TRIC cards

J.C Allica,M Andersen,L Jensen,F Lenardon,L Søby,D Belohrad

doi:10.1088/1748-0221/10/04/c04016

Abstract

At the CERN PS complex, precise fast intensity measurements are very important in order to optimize the transfer efficiencies between the different accelerators. Over the last two years a complete renovation has been ongoing, where the old electronics, based on analogue integrators, have been replaced by a fully digital system enclosed in a single VME based card. This new system called TRIC (Transformer Integration Card) is based on a 12 bit, 212 MS/s ADC and an FPGA for the signal processing. Also located on the same board one finds a 250 V/1.5 W DCDC converter used to generate precise calibration pulses.

Highlights

At the CERN PS complex, precise fast intensity measurements are very important in order to optimize the transfer efficiencies between the different accelerators
A calibrator which simulates the beam by injecting a well-defined current into a calibration winding is necessary in order to maintain accuracies in the order of 1%. Summarizing all these conditions, a VME 64X based electronics card has been developed to fulfil all the requirements of the system. This new card, known as the TRIC (Transformer Integration Card), is based on an Altera Cyclone EP2C20F484C6 (20,000 logic entities) FPGA which contains the entire control of the system and signal processing
Two 30 MHz analogue bandwidth, 12 bits 212 MS/s ADC channels are used for Fast Beam Current Transformers (FBCT) signal acquisition, connected to a low gain and high gain signal path

Summary

Introduction

At the CERN PS complex, precise fast intensity measurements are very important in order to optimize the transfer efficiencies between the different accelerators. In the case of the Fast Beam Current Transformers (FBCT) where the observation of short beam pulses is required, a bandwidth in the order of 100 MHz is needed. This new card, known as the TRIC (Transformer Integration Card), is based on an Altera Cyclone EP2C20F484C6 (20,000 logic entities) FPGA which contains the entire control of the system and signal processing.

Results

Conclusion