Abstracts Brochure - CERN

TUPLS — Poster Session 27-Jun-06 16:00 - 18:00
of independently driven sections with inter-tank quadrupole triplet focusing, this structure will accelerate highly
stripped ions with charge-to-mass ratios above 1/3 in the energy range from 1.57 MeV/u at the RFQ exit to 7 MeV/
u. Beam currents up to 100 mA are expected for medium ions like Carbon or Aluminum. Since the rf frequency is
duplicated at the entrance of the IH-DTL in order to reduce size as well as power consumption, space charge effects
are dominant at full current. Beam dynamics and structure parameters are discussed in detail.
The Isochronous Mode of the Collector Ring
The isochronous mode of a storage ring is a
special ion-optical setting in which the revolution
time of circulating ions of one species
does not depend on their velocity spread. In
S.A. Litvinov, A. Dolinskii, H. Geissel, F. Nolden, M. Steck, H.
Weick (GSI)
this mode the ring can be used for mass measurement of exotic nuclei. The Collector Ring (CR) [1] of the FAIR project
[2] will operate in such mode as time-of-flight spectrometer for short-lived exotic nuclei (T1/2 > 20 µs) produced and
selected in flight with the Super-FRS fragment separator [3]. This technique has been developed at the ESR [4]. The
dependence of the revolution time in the isochronous ring from its transverse acceptance, the closed orbit distortion,
and nonlinear imperfection of the magnet field was investigated analytically and with a Monte-Carlo simulation. The
corresponding results will be presented.
References: [1] A. Dolinskii et. al., GSI Annual Report, 2004 [2] W. Henning, Nucl. Phys. A721 (2003)211c [3] H.
Geissel, et. al., Nucl. Instr. Meth. B204 (2003)71 [4] M. Hausmann et. al., Nucl. Instr. Meth. A 446 (2000)569
First Section of a 352 MHz Prototype Alvarez DTL Tank for the CERN SPL
In the Linac4/SPL projects at CERN, 352
MHz 30 mA DTL Alvarez accelerating structure
will be used to accelerate protons between
3 and 40 MeV. The R&D for the development
of a prototype structure for the energy
range from 3 to 10 MeV is taking place
jointly at ITEP and VNIIEF. The design of
S.V. Plotnikov, A.P. Durkin, D. Kashinskiy, V.A. Koshelev, T.
Kulevoy, S. Minaev, V. Pershin, B.Y. Sharkov, V. Skachkov (ITEP)
V.F. Basmanov, V.A. Demanov, I.D. Goncharov, E.S. Mikhailov, N.I.
Moskvin, S.T. Nazarenko, V.S. Pavlov, V.V. Porkhaev, V.T. Punin,
A.V. Telnov, V.N. Yanovsky, N.V. Zavyalov, S.A. Zhelezov (VNIIEF)
this 2.7 m Alvarez tank containing 27 drift tubes is described in this document. Results of calculations of the section
parameters are presented. One of the main features of the design is the use of permanent magnets made of SmCo5
alloy as quadrupole focusing lenses (PMQ) inside the drift tubes. Details of the experimental PMQ-equipped drift
tube are described.
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