||ADS (accelerator driven nuclear
transmutation system) require a high intensity proton accelerator of
which energy and beam power are about 1 GeV and 20-30 MW, respectively.
JAERI, KEK, MHI and MELCO have conducted a program for the development
of superconducting proton linac for the ADS since 2002. This program,
which is based on the achievement of the J-PARC design work, consists
of two parts, development of a 972MHz cryomodule and system design of a
superconducting proton linac in the energy range between 0.1 and 1 GeV.
In the development work of the 972MHz cryomodule, a prototype
cryomodule will be developed and the horizontal test will be performed.
The cryomodule includes two 972MHz 9-cell cavities of beta=0.725. The
goal of this work is stable operation in the horizontal tests at the
surface peak field at 30 MV/m, which corresponds to the accelerating
gradient of 10 MV/m. The cavity development, which includes the
vertical tests, is mainly being performed at KEK. The horizontal tests
will be performed at JAERI where a 972MHz Klystron is in operation,
which is also utilized for the high power tests of the power couplers.
The details of the cavity development, the cryomodule design and the
power coupler development are presented by K. Saito, S. Noguchi and E.
Kako, respectively. In the system design work, the beam dynamics design
and the configuration design in a tunnel will be performed.