| Paper | Title | Other Keywords | Page | ||
|---|---|---|---|---|---|
| IT05 | Results with LHC Beam Instrumentation Prototypes | instrumentation, diagnostics, collider, LHC | 21 | ||
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The beam instrumentation foreseen to provide the
necessary diagnostics in the transfer lines and in the main
rings of the LHC was conceived in the past years. The
requirements expected from the different systems are now
being closely analyzed and specified. In a few cases, tests
of prototypes have already been performed, profiting from
the facilities offered by existing machines.
The beam position measurement system had to be
tackled first, as the pick-ups had to be integrated into the
cryogenic part of the machine. Over the last two years
other topics started to be experimentally investigated in
order to define the best way to meet the requirements for
the LHC era. Amongst these different studies are
luminosity monitoring devices, various instruments for the
measurement of the transverse beam distributions, the use
of head-tail sampling to measure the beam chromaticity
and quadrupole gradient modulation to derive the local
amplitude of the lattice function.
The paper discusses the results of these tests.
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| IT09 | Overview of RHIC Beam Instrumentation and First Experience from Operation
Work performed under the auspices of the U.S. Department of Energy |
instrumentation, diagnostics, RHIC | 41 | ||
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A summary of the beam instrumentation tools in place during the year 2000
commissioning run is given including the technical layout and the
appearance on the user level, here mainly the RHIC control room.
Experience from rst usage is reported as well as the lessons we have
learned during RHIC operation so far. Upgrades and changes compared to
the year 2000 systems are outlined. Described tools include beam position
monitors (BPM), ionization prole monitors (IPM), beam loss monitors
(BLM), bunch current measurements, luminosity monitors, tune meters and
Schottky monitors.
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| IT11 | Possible Spin-Offs from LHC Physics Experiments for Beam Instrumentation | instrumentation, diagnostics, LHC, collider | 51 | ||
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This paper aims to introduce some of the new
technology and materials used in the construction of the
LHC physics experiments into the domain of the beam
instrumentalist. The development of radiation hard fibre-optic
technology, for example, can equally well be
applied to beam instrumentation systems for the direct
transmission of analogue or digital signals from high to
low radiation environments. Many electronics techniques
such as a system developed for the fast integration of
photomultiplier signals could also prove very useful in
the construction of new beam diagnostic instruments for
bunch-to-bunch measurements. Other topics covered will
include a fast beam synchronous timing system based on
laser technology and a look at pixel detectors as a
possible replacement for CCD cameras in imaging
applications.
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| CT11 | New Development of a Radiation-Hard Polycrystalline CDTE Detector for LHC Luminosity Monitoring | instrumentation, diagnostics, collider, LHC, luminosity | 94 | ||
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Detectors presently considered for monitoring and
control of the LHC luminosity will sample the
hadronic/electromagnetic showers produced by neutrons
and photons in copper absorbers designed to protect the
superconducting magnets from quenching. At this
location the detectors will have to withstand extreme
radiation levels and their long term operation will have to
be assured without requiring human intervention. For this
application we have successfully tested thick
poly-crystalline-CdTe detectors. The paper summarizes
the results obtained on rise-times, sensitivity and
resistance to neutron irradiation up to a dose of
1015/cm2.
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| PS14 | Microwave Pickups for the Observation of Multi GHz Signals Induced by the ESRF Storage Ring Electron Bunches | instrumentation, diagnostics, pick-up, ESRF, emittance | 136 | ||
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The length of the bunches stored in ESRF lies in the 30 ps to 120 ps
range (FWHM). The observation of single bunch phenomena like transverse
or longitudinal oscillations or bunch length variation requires the
acquisition and analysis of signals at frequencies higher than 10 GHz. A
set of microwave cavity pick ups operating at 10 GHz and 16 GHz together
with the appropriate electronics has been implemented on the ESRF storage
ring; it detects the wall currents on the vacuum chamber due to the
electron beams circulation. We describe the design of these cavities,
give the result and analysis of measurements performed with the pick ups
and indicate how we plan to use these devices as beam diagnostics
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