Felix Marti

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An advanced facility for the production of exotic shortlived isotopes far from stability (RIA) could use as the driver a high power cw superconducting linac [1]. Due to the wide range of particle velocities ( =0:019-0:81), different cavity types are required. This paper describes a possible design for the injector portion (up to =0:1) of the driver linac.(More)
Reacceleration of low-energy rare isotope beams available from gas stopping of fast-fragment beams or from an ISOL target station to energies in the range of 0.3-12 MeV/nucleon is needed for experiments such as low-energy Coulomb excitation and transfer reaction studies and for the precise study of astrophysical reactions. The implementation of charge(More)
A cyclotron for proton therapy has to fulfil many requirements set by the specific operational and safety needs of a medical facility and the medical environment. These are for instance high extraction efficiency, high availability and reliability, simple and robust operation. ACCEL Instruments GmbH has refined the design concept of a medical cyclotron for(More)
Rare Isotope Beams (RIBs) are created at the National Superconducting Cyclotron Laboratory (NSCL) by the in-flight particle fragmentation method. A novel system that stops the RIBs in helium gas and reaccelerates them is proposed to provide opportunities for an experimental program ranging from low energy Coulomb excitation to transfer reaction studies of(More)
The purpose of this paper is to describe the control system of the Small Isochronous Ring (SIR) developed and built at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University (MSU). SIR is a small-scale experiment that simulates the dynamics of intense beams in large accelerators. A 20 to 30 keV hydrogen or deuterium ion bunch(More)
This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessible. Abstract—The mechanisms leading to a maximum of jc as a function of reaction time in (Bi,Pb)2Sr2Ca2Cu3Ox monofilamentary tapes are investigated. Various properties of tapes previously reacted(More)
The K500 cyclotron was the rst superconducting cyclotron to become operational in 1982. Two independent coils (with currents I /I ) produce a eld of approximately 5 T. During the original K500 cyclotron mapping cycle [1] the superconducting coils could not be centered with respect to the steel pole pieces. The forces at high excitation displaced the coil(More)
The present nuclear physics program at the National Superconducting Cyclotron Laboratory (NSCL) is based on an ECR-ion-source injected K1200 superconducting cyclotron. An upgrade project is now underway to significantly increase the facility’s output intensity for light ions and energy for heavy ions by coupling the existing superconducting K500 cyclotron(More)
This paper reviews a study of a compact superconducting cyclotron to accelerate 200 microamps of protons to 250 MeV. The basic cyclotron structure is the same as that developed in a previous study of a 250 MeV cancer therapy cyclotron, the chief difference in the study reported here being much higher beam current (x10,000) than in the therapy cyclotron to(More)