Abstracts Brochure - CERN

WEPCH163
WEPCH164
WEPCH165
28-Jun-06 16:00 - 18:00 WEPCH — Poster Session
Status of the Injector Linac for the Italian Hadrontherapy Project CNAO
B. Schlitt, C.M. Kleffner, M.T. Maier (GSI) M. Pullia, S. Rossi (CNAO
Foundation) U. Ratzinger, A. Schempp (IAP) C. Roncolato (INFN/
LNL)
320
The Italian hadrontherapy project CNAO
(Centro Nazionale di Adroterapia Oncologica)
is presently under construction in Pavia,
Italy. The injector linac is built in close collaboration
between CNAO and GSI in Darm-
stadt, Germany. The very compact 7 MeV/u, 217 MHz carbon-ion linac has been designed at GSI and at the Institute
of Applied Physics (IAP) at Frankfurt University and is very similar to the linac of the HICAT heavy ion cancer therapy
facility at the Radiologische Universitätsklinik in Heidelberg, Germany. It comprises a 400 keV/u, 1.4 m long RFQ
accelerator and a single 20 MV IH-type drift tube linac cavity with a length of about 3.8 m. The complete RF linac
as well as two electron cyclotron resonance ion sources and the low and medium energy beam transport lines will
be installed inside the CNAO heavy ion synchrotron. This contribution describes mainly the status of the linac RF
cavities which are assembled and RF tuned at the IAP and at GSI.
High Power RF Tests of the First Module of the TOP Linac SCDTL Structure
L. Picardi, C. Cianfarani, G. Messina, G.L. Orlandi, C. Ronsivalle
(ENEA C.R. Frascati) E. Cisbani, S.F. Frullani (ISS)
The TOP Linac (Oncological Therapy with
Protons), under development by ENEA and
ISS, is a sequence of three pulsed (5 microseconds,
300 Hz) linear accelerators: a 7 MeV,
425 MHz RFQ+DTL (AccSys Model PL-7), a 7-65 MeV, 2998 MHz Side Coupled Drift Tube Linac (SCDTL), and a
65-200 MeV, variable energy 2998 MHz Side Coupled Linac (SCL). The first SCDTL module structure, composed by
nine DTL tanks coupled by eight side cavities, has been built. Low power RF measurements have shown good field
uniformity and stability along the axis. The structure has been tested with a 1 - 4 MW power RF. Results of low and
high power tests are reported and discussed.
A Nonlinear Transport Line for the Optimization of F18 Production by the TOP Linac Injector
C. Ronsivalle, C. Cianfarani, G. Messina, G.L. Orlandi, L. Picardi
(ENEA C.R. Frascati) E. Cisbani, S.F. Frullani (ISS)
The injector of the TOP Linac (Oncological
Therapy with Protons), under development
by ENEA and ISS, consists of a 7 MeV, 425
MHz RFQ+DTL (AccSys Model PL-7). It is
actually in operation at ENEA-Frascati Laboratories for the production of the positron-emitting radionuclide F18 for
PET analyses by an intense proton beam (8 - 10 mA, 50 - 100 µs, 30 - 100 Hz). At the exit of the injector, the beam
is guided through a magnetic channel to a target composed by a thin chamber (0.5 mm thick and 1-inch diameter)
containing water enriched with O18. Recently, to the original quadrupole transport channel, a non-linear magnet
system using octupoles has been added in order to flatten the proton beam distribution and optimize the radioisotope
production. In the paper the details of the octupole design and beam dynamic study and the first measurements
results are presented.