| Paper |
Title |
Page |
| IT07 |
Digital Signal Processing in Beam Instrumentation: Latest Trends and Typical Applications
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30 |
| |
- M.E. Angoletta
CERN, Geneva, Switzerland
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During the last decade digital signal processing has found its way into
the beam instrumentation arena, to become an essential part of several
beam diagnostic systems. In fact, the recent impressive hardware
performance improvement made it possible for functions once exclusively
accomplished by analogue methods, to be enhanced by the application of an
alternative digital approach. This is true to a point that the conversion
to digital processing has become inevitable. Factors that favour crossing
the border towards digital implementation are obviously speed as well as
precision, signal-to-noise ratio, dynamic range, stability of components
and configuration capability, together with the availability of powerful
and user-friendly development tools. Improvement in A/D conversion and
processing speed has allowed successfully developing digital feedback
loops and on-line diagnostics. The ascent of such digital techniques
generated a concurrent and parallel interest in digital signal processing
algorithms and in the use of the associated digital hardware components.
Current trends in beam diagnostics include using Digital Signal
Processors (DSPs), Field Programmable Gate Arrays (FPGAs), digital
receivers and fast digitizers. The talk reviews latest developments and
illustrates selected digital applications, relevant to the beam
diagnostic area.
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| PM07 |
Real time management of the AD Schottky/BTF beam measurement system
|
104 |
| |
- M. Ludwig, M.E. Angoletta
CERN, Geneva, Switzerland
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| |
The AD Schottky and BTF system relies on rapid acquisition and analysis
of beam quantisation noise during the AD cycle which is based on an
embedded receiver and digital signal processing board hosted in a VME
system. The software running in the VME sets up the embedded system and
amplifiers, interfaces to the RF and control system, manages the
execution speed and sequence constraints with respect to the various
operating modes, schedules measurements during the AD cycle and performs
post processing taking into account the beam conditions in an autonomous
way. The operating modes of the instrument dynamically depend on a
detailed configuration, the beam parameters during the AD cycle and
optional user interaction. Various subsets of the processed data are
available on line and in quasi real time for beam intensity, momentum
spread and several spectrum types, which form an important part of AD
operation today.
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