| Paper |
Title |
Other Keywords |
Page |
| PS17 |
Beam Profile Detectors at the new fermilab injector and associated beamlines
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proton, instrumentation, booster, controls |
141 |
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- G. Tassotto, J. Zagel
FNAL, Fermi National Accelerator Laboratory, Batavia, IL, USA
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Transition radiation (TR) is nowadays intensively exploited
by a number of techniques to characterize different beam
parameters. These methods are based, sometimes implicitly,
on standard formulae, and used often without paying
due attention to their applicability. In particular, standard
expressions are only first-order asymptotic, i.e., strictly
speaking, valid at infinity. In this paper TR is examined in a
spatial domain where conventional results are no more exact
and variations in radiation properties are observed. Under
certain conditions, for example, at long wavelengths or
very high energies the effect is so considerable that should
be taken into account in accurate beam measurements.
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| PT12 |
Aspects of bunch shape measurements for low, intense ions beams
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ion, scattering, rfq, electron |
186 |
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- P. Forck, F. Heymach, U. Meyer, P. Moritz, P. Strehl
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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For the characterisation of the ion beam delivered by
the new High Current LINAC at GSI, the time structure
of bunches and the knowledge concerning their intensity
distribution in longitudinal phase space is of great
importance. At least 100ps time resolution and the
capability of measuring long tails in the distribution were
design parameters. Taking advantage of Rutherford-scattering
to reduce the count rate, a direct time of flight
measurement technique using diamond detectors can be
applied. First results are reported. Plans for determine the
energy of individual ions by detecting secondary
electrons emitted from a thin C foil using 1m drift are
discussed.
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| PT15 |
High current precision long pulse electron beam position monitor
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kicker, electron, instrumentation, diagnostics |
193 |
| |
- S.D. Nelson, Y.J. Chen, T. Fessenden, C. Holmes
LLNL, Lawrence Livermore National Laboratory, Livermore, CA, USA
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Precision high current long pulse electron beam position
monitoring has typically experienced problems with high
Q sensors, sensors damped to the point of lack of precision,
or sensors that interact substantially with any beam
halo thus obscuring the desired signal. As part of the
effort to develop a multi-axis electron beam transport system
using transverse electromagnetic stripline kicker technology,
it is necessary to precisely determine the
position and extent of long high energy beams for accurate
beam position control (6 - 40 MeV, 1 - 4 kA, 2 μs
beam pulse, sub millimeter beam position accuracy.)
The kicker positioning system utilizes shot-to-shot adjustments
for reduction of relatively slow (< 20 MHz) motion
of the beam centroid. The electron beams passing through
the diagnostic systems have the potential for large halo
effects that tend to corrupt position measurements.
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