Abstracts Brochure - CERN

MOPLS121
MOPLS122
MOPLS123
MOPLS124
26-Jun-06 16:00 - 18:00 MOPLS — Poster Session
The DAFNE Beam Test Facility: from 1 to 10 Milliards of Particles
G. Mazzitelli, B. Buonomo, L. Quintieri (INFN/LNF) P. Valente
(INFN-Roma)
142
The DAFNE Beam Test Facility is operating
since 2002, providing electrons, positrons
and photons from the single particle up to
1010 particleS per spill and from 20 to 750
MeV. During these years, the facility has hosted tens of high energy test and experiments coming from all Europe,
operating in a wide spread of multiplicity and energy. Operation performance and parameters, tools and diagnostics,
as well as the main results obtained, are presented.
Design of the ILC Prototype FONT4 Digital Intra-train Beam-based Feedback System
We report on the design and initial testing
P. Burrows (Queen Mary University of London)
of the 4th generation Feedback on Nanosecond
Timescales (FONT) prototype intra-train
beam-based feedback system for beam control and luminosity optimisation at the International Linear Collider (ILC).
FONT4 comprises a fast-analogue front-end BPM signal processor, with an FPGA-based digital feedback processor
and a fast-risetime kicker-driver amplifier. The system is being designed with a total latency budget (including signal
propagation delays) of about 140ns. FONT4 will be deployed at the Accelerator Test Facility (ATF) at KEK, where it
will be tested with the electron bunchtrain extracted from the ATF damping ring. The bunches will have a spacing of
c. 150ns, chosen to match the ILC design. We report the results of initial beam tests of the system components. We
aim to demonstrate feedback, with delay-loop operation, on this ILC-like bunchtrain.
Performance of the FONT3 Fast Analogue Intra-train Beam-based Feedback System at ATF
We report on the design and testing of
P. Burrows (Queen Mary University of London)
the 3rd generation Feedback On Nanosecond
Timescales (FONT) prototype intra-train
beam-based feedback system for beam control and luminosity optimisation at the International Linear Collider (ILC).
The all-analogue FONT3 electronics was designed to have an ultra-short latency of c. 10ns. We describe the design
of the BPM signal processor, feedback circuit and kicker-driver amplifier. We report on deployment of FONT3 at
the Accelerator Test Facility (ATF) at KEK, where it was tested with the 56ns-long electron bunchtrain extracted from
the ATF damping ring. Feedback, with delay-loop operation, on the beam was demonstrated with a latency close to
design. We comment on the applicability of this technology to ILC, as well as future warm-RF based linear colliders,
such as CLIC.
The KEK Linac Upgrade for the Fast Beam Mode Switch
The KEK linac is a 600-m-long linear acceler-
M. Satoh (KEK)
ator with maximum energy 8-GeV electron
and 3.5-GeV positron, and it is used as an
injector for 4-rings (KEKB e-/ e+, PF, PF-AR). To increase the operation efficiency, we have an injector upgrade plan
for the quasi-simultaneous injection. In this paper, we will present the operation scheme and the construction of a
new beam transport line in detail.