Abstract
We performed a beam test of a new radio frequency quadrupole linac (RFQ III) for the beam current upgrade of the Japan Proton Accelerator Research Complex. First, the conditioning of RFQ III was conducted, and after 20 h of conditioning, RFQ III became very stable with a nominal peak power and duty factor of 400 kW and 1.5%, respectively. An off-line beam test was subsequently conducted before installation in the accelerator tunnel. The transmission, transverse emittance, and energy spread of the 50-mA negative hydrogen beam from RFQ III were measured and compared with simulation results. The experiment and simulation results showed good agreement; therefore, we conclude that the performance of RFQ III conforms to its design.
Highlights
The Japan Proton Accelerator Research Complex (J-PARC) is a multipurpose facility for particle physics, nuclear physics, materials and life science, and other applications
Because the low energy beam transport (LEBT) of the radio frequency quadrupole (RFQ) test stand was not equipped with emittance monitors, the distribution of the ion source had been measured at another ion source test stand prior to installation on the RFQ test stand
RFQ III employs a conventional beam dynamics design, namely, it consists of an radial matching section (RMS), a SP, a gentle buncher (GB), and an ACC
Summary
The Japan Proton Accelerator Research Complex (J-PARC) is a multipurpose facility for particle physics, nuclear physics, materials and life science, and other applications. The original design energy and peak beam current of the linac are 400 MeV and 50 mA, respectively. To upgrade the beam current of the J-PARC linac to achieve the original design power of 1 MW (at the neutron target), a new RFQ with a design current of 50 mA has been developed [3].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physical Review Special Topics - Accelerators and Beams
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
