Author: Barquest, B.
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THPAL112 RF Matching Circuit for CANREB RFQ 3902
  • T. Au, B. Barquest, J.J. Keir, V. Zvyagintsev
    TRIUMF, Vancouver, Canada
  A RF matching circuit has been developed to provide two phase RF voltage of 1.2 kVpp at 3 MHz and 6 MHz for the CANREB RFQ structure with an equivalent capacitive load of 300 pF. The RF matching circuit utilizes pi-network with two phase transformer. Beyond RF drive the CANREB structure requires pulse DC bias with amplitude up to 500 V. Results of development and testing of RF matching circuit and filters are presented in this paper.  
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THPAL116 Development and Installation of the CANREB RFQ Buncher at TRIUMF 3914
  • B. Barquest, F. Ames, T. Au, L. Graham, M.R. Pearson, V. Zvyagintsev
    TRIUMF, Vancouver, Canada
  • J. Bale, J. Dilling, R. Kruecken, Y. Lan
    UBC & TRIUMF, Vancouver, British Columbia, Canada
  • G. Gwinner
    University of Manitoba, Manitoba, Canada
  • N. Janzen, R.A. Simpson
    UW/Physics, Waterloo, Ontario, Canada
  • R. Kanungo
    Saint Mary's University, Halifax, Canada
  Funding: TRIUMF receives federal funding via the National Research Council of Canada. CANREB is funded by the Canada Foundation for Innovation (CFI), the Provinces NS, MB and TRIUMF.
Pure, intense rare isotope beams at a wide range of energies are crucial to the nuclear science programs at TRIUMF. The CANREB project will deliver a high resolution spectrometer (HRS) for beam purification, and a charge breeding system consisting of a radiofrequency quadrupole (RFQ) beam cooler and buncher, an electron beam ion source (EBIS), and a Nier-type spectrometer to prepare the beam for post-acceleration. Bunching the beam prior to charge breeding will significantly enhance the efficiency of the EBIS. The RFQ buncher will accept continuous §I{60}{keV} rare isotope beams from the ARIEL or ISAC production targets and efficiently deliver low emittance bunched beams. A pulsed drift tube (PDT) will adjust the energy of the bunched beam for injection into the EBIS to match the acceptance of the post-accelerating RFQ. Ion optical simulations were carried out to inform the design of the RFQ buncher and PDT. Simulations indicate that delivery of up to 107~ions per bunch with high efficiency is possible. Experience with previous beam bunchers was also brought to bear in the design effort. Installation of the RFQ is under way, and tests with offline beam are expected to be performed in late 2018.
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