Development of a beam profile diagnostics device for the VENUS ECR ion source beam line

Details Development of a beam profile diagnostics device for the VENUS ECR ion source beam line Development of a beam profile diagnostics device for the VENUS ECR ion source beam line

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aps..dnp.dh002p&link_type=abstract

American Physical Society, Division of Nuclear Physics Annual Meeting, October 25-28, 2006, abstract #DH.002

Physics

Nuclear Physics

Scientific paper

This work describes the design and development of the instrumentation for a beam profile diagnostics unit for the low energy beam transport line of the superconducting Electron Cyclotron Resonance (ECR) ion source VENUS (Versatile ECR ion source for Nuclear Science). VENUS is currently being commissioned at LBNL and serves as the prototype ECR injector source for next generation heavy ion accelerators. In order to enhance simulations of beam transport from extraction in VENUS, a measurement device (called a harp) consisting of a grid of thin conducting wires is placed into the beam line, directly downstream from extraction, to measure the beam profile. Utilizing the diagnostics unit developed and described in this work, the first measurements of the beam profile for a simple helium beam are presented. By changing the Glaser current to focus the ion beam onto the harp, the helium beam profiles illustrate that the extracted beam has the same symmetry as the plasma surface from which they are extracted, and not the uniform circular symmetry that is assumed in most simulation models. These results give quantitative insight into the enhancement of initial conditions needed for using simulations to give a physically accurate description of beam transport from extraction of an ECR source.

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