| Paper |
Title |
Other Keywords |
Page |
| PS13 |
Analysis of the proton beam in the DESY transport lines by video readout
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emittance, proton, luminosity, vacuum |
129 |
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- F. Solodovnik, T. Limberg, K. Wittenburg
IHEP, Institute for High Energy Physics, Protvino, Russia
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Injection efficiency, beam optic matching and
emittance preservation are very important parameters in
achieving a high luminosity in large proton
accelerators. We improved the analysing system of the
phosphor screen readout of the proton transport lines in
the accelerator chain of HERA with respect to the
parameters above. The screens are read out by simple
CCD video cameras. The signals are stored in local
frame grabbers. An analogue output of the stored image
is multiplexed and read-out by a fast PCI frame grabber
card in a PC. The beam orbit and the beam emittance
can be measured from each screen. A Visual Basic
program is used to displays the trajectory and the
envelope of the beam from a single transfer. The same
program helps to drive bumps to achieve a proper
steering through the line. The beam width can be
measured from selected screens to calculate the
emittance and other beam parameters including their
errors. The read out and analysing system will be
described and measurements will be shown.
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| PT17 |
Role of pre-wave zone effects in TR-based beam diagnostics
|
radiation, diagnostics, electromagnetic-fields, linac |
199 |
| |
- V.A. Verzilov
INFN-LNF, Laboratori Nazionali di Frascati dell'INFN, Frascati, Italy
| |
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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