Author: Leitner, D.
Paper Title Page
MO1PB02 New Developments and Capabilities at the Coupled Cyclotron Facility at Michigan State University 7
  • A. Stolz, G. Bollen, A. Lapierre, D. Leitner, D.J. Morrissey, S. Schwarz, C. Sumithrarachchi, W. Wittmer
    NSCL, East Lansing, Michigan, USA
  A brief overview of the Coupled Cyclotron Facility will be presented with a focus on the newly commissioned stopped beam and reaccelerated radioactive ion beam capabilities. Commissioning results and operations experience of the combined system of Coupled Cyclotron Facility, A1900 fragment separator, gas stopper, EBIT charge-breeder and ReA linac will be presented.  
slides icon Slides MO1PB02 [42.670 MB]  
TUPPT015 A Center Region Upgrade of the LBNL 88-Inch Cyclotron 186
  • K. Yoshiki Franzen, J.Y. Benitez, M.K. Covo, A. Hodgkinson, C.M. Lyneis, B. Ninemire, L. Phair, P. Pipersky, M.M. Strohmeier, D.S. Todd
    LBNL, Berkeley, California, USA
  • D. Leitner
    NSCL, East Lansing, Michigan, USA
  This paper describes the design and results of an upgraded cyclotron center region in which a mirror field type inflector was replaced by a spiral inflector. The main goals of the design were a) to facilitate injection at higher energies in order to improve transmission efficiency and b) to reduce down-time due to the need of replacing mirror inflector wires which rapidly break when exposed to high beam currents. The design was based on a detailed model of the spiral inflector and matching center region electrodes using AMaze, a 3D finite element suite of codes. Tests showed promising results indicating that the 88-Inch cyclotron will be able to provide a 2.0 pμA beam of 250 MeV 48Ca ions.  
WE3PB03 Space Charge Compensation Measurements in the Injector Beam Lines of the NSCL Coupled Cyclotron Facility 417
  • D. Winklehner, D.G. Cole, D. Leitner, G. Machicoane, L. Tobos
    NSCL, East Lansing, Michigan, USA
  Space charge compensation is a well-known phenomenon for high current injector beam lines. For beam lines using mostly magnetic focusing elements and for pressures above 10-6 mbar, compensation (neutralization) up to 98% has been observed. However, due to the low pressures required for the efficient transport of high charge state ions, ion beams in ECR injector lines are typically only partly neutralized and space charge effects are present. With the dramatic performance increase of the next generation Electron Cyclotron Resonance Ion Sources (ECRIS) it is possible to extract tens of mA of beams from ECR plasmas. Realistic beam transport simulations are important to meet the acceptance criteria of subsequent accelerator systems and have to include non-linear effects from space charge, but also space charge compensation. In this contribution we report on measurements of space charge compensation in the ECRIS low energy beam lines of the Coupled Cyclotron Facility at NSCL using a retarding field analyzer. Results are discussed and compared to simulations.  
slides icon Slides WE3PB03 [8.833 MB]