Author: Machicoane, G.
Paper Title Page
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]