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Content Provider | IEEE Xplore Digital Library |
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Author | Angoletta, M.E. Chohan, V. Ludwig, M. Marqversen, O. Pedersen, F. |
Copyright Year | 2001 |
Description | Author affiliation: CERN, Geneva, Switzerland (Angoletta, M.E.) |
Abstract | An innovative system to measure antiproton beam intensity, momentum spread and mean momentum in CERN's Antiproton Decelerator (AD) is described. This system is based on a state-of-the-art digital receiver (DRX) board, consisting of 8 digital down-converter (DDC) chips and one digital signal processor (DSP). An ultra-low-noise, wide-band AC beam transformer (0.2 MHz -30 MHz) is used to measure AC beam current modulation. For bunched beams, the intensity is obtained by measuring the amplitude of the fundamental and second RF Fourier components. On the magnetic plateaus the beam is debunched for stochastic or electron cooling and longitudinal beam properties (intensity, momentum spread and mean momentum) are measured by FFT-based spectral analysis of Schottky signals. The system thus provides real time information characterising the machine performance; it has been used for troubleshooting and to fine-tune the AD, thus achieving further improved performances. This system has been operating since May 2000 and typical results are presented. |
Sponsorship | U.S. Dept. Energy |
Starting Page | 2371 |
Ending Page | 2373 |
File Size | 290964 |
Page Count | 3 |
File Format | |
ISBN | 0780371917 |
DOI | 10.1109/PAC.2001.987385 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2001-06-18 |
Publisher Place | USA |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Semiconductor device measurement Digital signal processors Digital signal processing chips Ultra wideband technology Current measurement Optical modulation Radio frequency Stochastic processes Electron beams Cooling |
Content Type | Text |
Resource Type | Article |
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