Abstracts Brochure - CERN

WEPLS — Poster Session 28-Jun-06 16:00 - 18:00
energy straggling begins to limit the absorber technique, and stretched again. The potential transverse emittance
reduction and the intrinsic limitations of the REMEX technique have been analyzed earlier. In this report, we describe
the required beam transport and RF parameters needed to achieve the maximum REMEX effect.
The RF Deflector for the CTF3 Delay Loop
In the CLIC Test Facility 3 (CTF3) a 42 m long
ring, called delay loop, is used to halve the F. Marcellini, D. Alesini (INFN/LNF)
distance between bunches in the drive beam.
The compression is obtained by merging two adjacent bunch trains from the linac deflected in opposite directions by
an RF device, in such a way that the first train is forced to perform a full revolution in the delay loop, while the second
one passes through. The length of the ring is an odd multiple of half the distance between bunches in the beam
from the linac. The RF deflector consists of two identical cavities connected to the RF power source through a hybrid
junction that equally splits the power and isolates the klystron from reflections. Its innovative design, the results of
electromagnetic simulations and expected performances are described, together with low level RF measurements for
test and characterization of the device before installation. Preliminary recombination results with the CTF3 beam are
also shown. The RF deflector has also been used to measure the length of the accelerated bunches.
The PLASMONX Project for Advanced Beam Physics Experiments at LNF
The Project PLASMONX is well progressing
into its design phase and has entered as well L. Serafini (INFN-Milano)
its second phase of procurements for main
components. The project foresees the installation at LNF of a Ti:Sa laser system (peak power > 170 TW), synchronized
to the high brightness electron beam produced by the SPARC photo-injector. The advancement of the procurement
of such a laser system is reported, as well as the construction plans of a new building at LNF to host a dedicated
laboratory for high intensity photon beam experiments (High Intensity Laser Laboratory). Several experiments
are foreseen using this complex facility, mainly in the high gradient plasma acceleration field and in the field of
mono-chromatic ultra-fast X-ray pulse generation via Thomson back-scattering. We present an innovative scheme
of external injection of the SPARC beam into laser wake-field driven plasma waves. Detailed numerical simulations
have been carried out to study the generation of short electron bunches, to be injected into plasma waves driven with
adiabatically variable density in order to compress the bunch at injection and further accelerate it by preserving a
small energy spread and good beam quality.
Possibility of Beam Energy Measurements Based on Synchrotron Radiation from ILC
Magnet Spectrometer
The magnetic spectrometer with a relative
energy resolution of 5·10 -5 was proposed for
ILC beam energy measurements. The beam
energy measurement is based on precise de-
E. Syresin, B.Zh. Zalikhanov (JINR) K.H. Hiller, H.J. Schriber
(DESY Zeuthen) R.S. Makarov (MSU)
finition of the beam position at a resolution of 100 nm and B-field integral at an accuracy of 2E-5. A complementary
method of the beam energy measurement is proposed at registration of synchrotron radiation (SR) from the energy
spectrometer dipole magnets. The measurements of both edge horizontal positions for SR fan on a distance of 50-70
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