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Title |
Other Keywords |
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| IT04 |
Challenges for LHC and Demands on Beam Instrumentation
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LHC, instrumentation, collimation, superconducting-magnet |
15 |
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- J. Wenninger
CERN, Geneva, Switzerland
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The LHC machine presently under construction at CERN will exceed existing
superconducting colliders by about one order of magnitude for luminosity
and beam energies for pp collisions. To achieve this performance the
bunch frequency is as large as 40 MHz and the range in beam intensity
covers 5·109 protons to 3·1014 protons with a normalised
beam emittance as small as 3 μmrad. This puts very stringent demands on the beam
instrumentation to be able to measure beam parameters like beam
positions, profiles, tunes, chromaticities, beam losses or luminosity.
The presentation will pick out interesting subjects of the LHC beam
instrumentation field. The examples will be chosen to cover new detection
principles or new numerical data treatments, which had to be developed
for the LHC as well as aspects of operational reliability for
instrumentation, which will be used for machine protection systems.
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| PM14 |
Upgrade Of The ESRF Fluorescent Screen Monitors
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instrumentation, emittance, linac |
125 |
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- K. Scheidt
ESRF, European Synchrotron Radiation Facility, Grenoble, France
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The ESRF injector system contains 23 Fluorescent Screen monitors: 4 in
the TL-1 transferline (200 MeV), 8 in the Booster, and 11 in the TL-2
transferline (6 GeV). They are based on Chromium doped Alumina screens
that are pneumatically inserted at 45o angle in the beam path with an
optical system, at 90o angle, collecting and focusing the emitted
light onto a low-cost CCD camera with standard 75Ω video output.
Serving mainly alignment purposes in the past 10 years, the present
upgrade aims at a 200 μm fwhm resolution for beam-size and profile
measurements. The particularity of the Alumina screen not in vacuum but
in atmosphere will be explained. Details of the mechanics, the optic
system and a cost-efficient way of light flux adjustment will be given.
The analysis of the factors determining the ultimate spatial resolution
will show that it is dominated by the screen characteristics. Results
obtained with different screen material will be presented.
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