Abstracts Brochure - CERN

TUPLS056
TUPLS057
TUPLS058
27-Jun-06 16:00 - 18:00 TUPLS — Poster Session
A Prototype of 3-11 MEV RFQ-DTL Accelerating Structure for CERN SPL Project
S.V. Ivanov, O.K. Belyaev, Yu.A. Budanov, V.G. Kudryavtsev, O.P.
Lebedev, A.P. Maltsev, E.V. Mazurov, S.R. Salakhutdinov, V.B.
Stepanov, V.A. Teplyakov, A.A. Timopheev, E.F. Troyanov, N.E.
Tyurin, I.A. Zvonarev (IHEP Protvino) V.F. Basmanov, D.V. Boudnikov,
I.D. Goncharov, N.I. Moskvin, S.T. Nazarenko, V.T. Punin,
S.A. Putevskoy, M.L. Smetanin, A.V. Telnov, V.N. Yanovsky, N.V.
Zavyalov, S.A. Zhelezov (VNIIEF)
236
A prototype of 3-11 MeV H ion linac with
spatially periodic RFQ focusing to be run
under a 14% heavy duty factor is presented.
Outcomes of beam dynamic studies for particles
traversing accelerating & focusing channel
with accelerating gap voltage ramped
downstream of beam are specified. Geometry
of a two-vane cavity, of accelerating and
focusing electrodes, and of an RF power in-
put coupler is adopted in compliance with 3D electrodynamical calculations. Results of experimental studies for
electrodynamical parameters of a full-scale cold model of the prototype are given. Thermal stress and deformation
analysis data is presented. Ultimate design developed of the H ion linac structure prototype to be manufactured is
outlined.
Linac4, a New Injector for the CERN PS Booster
R. Garoby, F. Gerigk, K. Hanke, A.M. Lombardi, M. Pasini, C. Rossi,
E.Zh. Sargsyan, M. Vretenar (CERN)
The first bottle-neck towards higher beam
brightness in the LHC injector chain is due
to space charge induced tune spread at injection
in the CERN PS Booster (PSB). A new
injector called Linac4 is proposed to remove this limitation. Using RF cavities at 352 and 704 MHz, it will replace the
present 50 MeV proton Linac2, and deliver a 160 MeV, 40 mA H − beam. The higher injection energy will reduce space
charge effects by a factor of 2, and charge exchange will drastically reduce the beam losses at injection. Operation will
be simplified and the beam brightness required for the LHC ultimate luminosity should be obtained at PS ejection.
Moreover, for the needs of non-LHC physics experiments like ISOLDE, the number of protons per pulse from the PSB
will increase by a significant factor. This new linac constitutes an essential component of any of the envisaged LHC
upgrade scenarios, which can also become the low energy part of a future 3.5 GeV, multi-megawatt superconducting
linac (SPL). The present design has benefited from the support of the French CEA and IN2P3, of the European Union
and of the ISTC (Moscow). The proposed machine and its layout on the CERN site are described.
New Prestripping Section of the MILAC Linear Accelerator Designed for Accelerating a
High Current Beam of Light Ions
A.P. Kobets, V.A. Bomko, O.F. Dyachenko, Ye.V. Ivakhno, M.S.
Lesnykh, Z.O. Ptukhina, V.N. Reshetnikov, S.S. Tishkin, V.P. Yashin,
A.V. Zabotin, B.V. Zajtsev, Yu.G. Zalesskij (NSC/KIPT)
In the Kharkov Institute of Physics and Technology,
the works on construction of a new
prestripping section of the multicharge ion
linear accelerator (MILAC) is performed.
The task is set to provide acceleration of high
current beams of light ions for research works on radiation material engineering and applied investigations. The
new prestripping section is designed for accelerating ions with A/q=4 up to the energy of 1 MeV/u; after stripping
they will be accelerated in the main section up to the energy of 8.5 MeV/u. Special operational mode will allow to
increase noticeably the repetition rate with the same power consumption. The calculation results on beam dynamics
in the structure with alternating phase focusing in the version with the stepped change of the synchronous phase, and