Sep 20 – 24, 2021
America/Vancouver timezone

New Commissioning Results of the MIST-1 Multicusp Ion Source

Sep 20, 2021, 6:00 AM
Parallel Session (Contributed Oral) talk Production of high intensity ion beams


Dr Daniel Winklehner (Massachusetts Institute of Technology)


For the sterile neutrino experiment IsoDAR (Isotope Decay-At-Rest), we have developed a compact particle accelerator system delivering a 10 mA, continuous wave (cw) proton beam at 60 MeV to a neutrino production target. The accelerator comprises a compact isochronous cyclotron, an RFQ embedded in the cyclotron yoke, and an ion source. To reduce space charge effects during injection and acceleration, we are accelerating H2+ instead of protons. To produce the needed cw H2+ beam current of 10 mA (nominal) at the required purity and quality, we have built a new filament driven, multicusp ion source (MIST-1). Here we report commissioning results for long-time running at reduced power, demonstrating the feasibility of the design. Highlights include an H2+ beam current density of 12 mA/cm2, > 80 % H2+ fraction, and emittances of 0.05 π-mm-mrad (RMS, normalized) after extraction. We also present high fidelity simulations that are in good qualitative and quantitative agreement with emittance measurements in our test beam line.

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Primary authors

Dr Daniel Winklehner (Massachusetts Institute of Technology) Janet Conrad (MIT) Joseph Smolsky (Massachusetts Institute of Technology) Loyd Waites (Massachusetts Institute of Technology) Philip Weigel (Massachusetts Institute of Technology)

Presentation materials