Author: Calanna, A.
Paper Title Page
WEPPT027 Design of the Injection into the 800 MeV/amu High Power Cyclotron 375
  • M. Haj Tahar, F. Méot
    BNL, Upton, Long Island, New York, USA
  • L. Calabretta
    INFN/LNS, Catania, Italy
  • A. Calanna
    CSFNSM, Catania, Italy
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
We present the design of the injection line into a separated sector cyclotron (SSC) aimed at the production of a high power beam of 800MeV/amu molecular H2+ for ADS-Reactor applications. To work out the beam line parameters and beam dynamics simulations, including the first accelerated turns, we used the ray-tracing code Zgoubi and the OPERA magnetic field map of the cyclotron sector*. We simulated the injection path of the H2+ and evaluated both radial and vertical injection schemes in order to evaluate the parameters so derived. The paper details and discusses various aspects of that design study and its outcomes.
* A.Calanna et al., A multi-megawatt ring cyclotron to search for CP violation in the neutrino sector, April 2011, e-Print: arXiv:1104.4985
WEPPT028 Proposal for High Power Cyclotrons Test Site in Catania 378
  • L. Calabretta, D. Campo, L. Celona, L. Cosentino, C. Cui, G. Gallo, D. Rifuggiato
    INFN/LNS, Catania, Italy
  • J.R. Alonso, W.A. Barletta, A. Calanna, D. Campo, J.M. Conrad
    MIT, Cambridge, Massachusetts, USA
  • R.R. Johnson
    BCSI, Vancouver, BC, Canada
  • L. AC. Piazza
    INFN/LNL, Legnaro (PD), Italy
  The IsoDAR and DAEδALUS experiments will use cyclotrons to deliver high intensity (10 mA peak current) proton beams to neutrino-producing targets. To achieve these very high currents, we plan to inject and accelerate molecular H2+ ions in the cyclotrons. To understand high intensity H2+ injection into the central region of a compact cyclotron, and to benchmark space-charge dominated simulation studies, central-region tests are being conducted. Building on the first experiments at Best Cyclotrons, Vancouver (Abstract 1261), a larger-scale test cyclotron will be built at INFN-LNS in Catania. This cyclotron will be designed for 7 MeV/n (Q/A = 0.5; H2+ or He++). After the first year of operation dedicated at optimization of the central region for the injection of high intensity Q/A = 0.5 beams, the cyclotron will be modified to allow the acceleration of H up to an energy of 28 MeV. The main characteristics of the machine and the planned test stand will be presented.  
WEPPT029 The Cyclotron Complex for the DAEδALUS Experiment 381
  • A. Calanna, D. Campo, J.M. Conrad
    MIT, Cambridge, Massachusetts, USA
  • L. Calabretta
    INFN/LNS, Catania, Italy
  • M. Haj Tahar, F. Méot
    BNL, Upton, Long Island, New York, USA
  The cyclotron complex for the DAEδALUS CP-Violation neutrino experiment consists of a compact cyclotron able to accelerate high-current (5 electrical milliamp) H2+ beams up to an energy of 60 MeV/amu, cleanly extract this beam with a conventional septum arrangement, and transport it to a superconducting ring cyclotron able to accelerate the beam up to 800 MeV/amu. H2+ is dissociated with thin stripping foils for efficient extraction as protons for transport to a megawatt-class target for neutrino production. The injection cyclotron will be similar to the one proposed for the IsoDAR experiment (Paper WEPPT029). The Ring cyclotron is similar in size and engineering concept to the SRC at RIKEN. Space-charge dominated beam dynamics simulations using OPAL have been performed for an 8-sector geometry, and indicate acceptable transmission and low beam losses. Subsequent engineering magnet-design studies of Minervini et al. point to a 6-sector configuration as more practical. Recalculation of the beam dynamics for this new configuration will be performed in the coming year. Results of the studies conducted to date will be presented.  
WEPPT030 High Intensity Compact Cyclotron for ISODAR Experiment 384
  • D. Campo, J.R. Alonso, W.A. Barletta, L.M. Bartoszek, A. Calanna, J.M. Conrad, M. Toups
    MIT, Cambridge, Massachusetts, USA
  • A. Adelmann
    PSI, Villigen PSI, Switzerland
  • L. Calabretta, C. Cui, G. Gallo
    INFN/LNS, Catania, Italy
  • R. Gutierrez-Martinez, L.A. Winslow
    UCLA, Los Angeles, USA
  • M. Shaevitz
    Columbia University, New York, USA
  • J.J. Yang
    CIAE, Beijing, People's Republic of China
  IsoDAR is an experiment proposed to look for the existence of sterile neutrinos. These are additional neutrino states beyond the "standard" 3-nu paradigm, are predicted to exist to explain anomalies in several neutrino experiments. In IsoDAR (Isotope Decay At Rest), electron antineutrinos produced in a target ~15 meters from a kiloton-scale detector would oscillate into and out of the sterile state within the extent of the detector, producing a sinusoidal event rate as a function of distance from the target. The nu-e-bar flux arises from decay of 8Li, produced when a high-current beam of protons or deuterons strikes a beryllium target either directly, or via secondary neutrons that interact in a large, ultra-pure 7Li sleeve surrounding the target. A compact Q/A = 0.5 cyclotron with top energy of 60 MeV/amu will be installed underground close to KamLAND. This cyclotron is a prototype for the DAEδALUS cyclotron chain (Paper WEPPT030). With a central field of 1.075T, it will operate in the 4th harmonic. Preliminary designs will be described, as well as possible solutions for transport and assembly of the machine through the very constricted access apertures of the Kamioka mine.