| Paper | Title | Other Keywords | Page | ||
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| PM07 | Orbit Control at the Advanced Photon Source
Work supported by the US Department of Energy |
instrumentation, diagnostics, controls, closed-orbit, pick-up | 177 | ||
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The Advanced Photon Source (APS) began operation in 1995 with the
objective of providing ultra-stable high-brightness hard x-rays to its
user community. This paper will be a review of the instrumentation and
software presently in use for orbit stabilization. Broad-band and
narrow-band rf beam position monitors as well as x-ray beam position
monitors supporting bending magnet and insertion device source points are
used in an integrated system. Status and upgrade plans for the system
will be discussed.
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| PM08 | Advanced Photon Source RF Beam Position Monitor System Upgrade Design and Commissioning | instrumentation, diagnostics, controls, closed-orbit, pick-up | 180 | ||
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This paper describes the Advanced Photon Source (APS) storage ring
mono-pulse rf beam position monitor (BPM) system upgrade. The present rf
BPM system requires a large dead time of 400 ns between the measured
bunch and upstream bunch. The bunch pattern is also constrained by the
required target cluster of six bunches of 7 mA minimum necessary to
operate the receiver near the top end of the dynamic range. The upgrade
design objectives involve resolving bunches spaced as closely as 100 ns.
These design objectives require us to reduce receiver front-end losses
and reflections. An improved trigger scheme that minimizes systematic
errors is also required. The upgrade is in the final phases of
installation and commissioning at this time. The latest experimental and
commissioning data and results will be presented.
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