Author: Toups, M.
Paper Title Page
WEPPT026 Cyclotron Injection Tests of High-Intensity H2+ Beam 372
  • F.S. Labrecque, B.F. Milton
    BCSI, Vancouver, BC, Canada
  • J.R. Alonso, D. Campo, J.M. Conrad, M. Toups
    MIT, Cambridge, Massachusetts, USA
  • L. Calabretta, L. Celona
    INFN/LNS, Catania, Italy
  • R. Gutierrez-Martinez, L.A. Winslow
    UCLA, Los Angeles, USA
  • D. Winklehner
    NSCL, East Lansing, Michigan, USA
  Funding: Work funded by NSF agency, contract PHY-1148134
The IsoDAR (sterile neutrino) and DAEδALUS (CP-violation in neutrino sector) 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. 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. The first test was completed this summer; a collaboration of MIT, BEST Cyclotrons and INFN-LNS at the BEST shops in Vancouver. The LNS Versatile Ion Source (VIS) was shipped from Catania to Vancouver, and was mounted, along with HV components and first focusing solenoid, on a test bench. In addition to the bench, BEST provided further beam line elements, instrumentation and a test cyclotron magnet for acceleration to no greater than 1 MeV/amu (to avoid any neutron production). Axial injection studies were conducted with a Catania-designed spiral inflector. Experimental configurations, beam characterization measurements, and phase acceptance and buncher efficiency studies will be reported.
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.