Design study of low-energy beam transport for multi-charge beams at RAON

Bahng, Jungbae; Qiang, Ji; Kim, Eun-San

doi:10.1016/j.nima.2015.09.041

Title: Design study of low-energy beam transport for multi-charge beams at RAON

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Abstract

The Rare isotope Accelerator Of Newness (RAON) at the Rare Isotope Science Project (RISP) is being designed to simultaneously accelerate beams with multiple charge states. It includes a driver superconducting (SC) linac for producing 200 MeV/u and 400 kW continuous wave (CW) heavy ion beams from protons to uranium. The RAON consists of a few electron cyclotron resonance ion sources, a low-energy beam transport (LEBT) system, a CW 81.25 MHz, 500 keV/u radio frequency quadrupole (RFQ) accelerator, a medium-energy beam transport system, the SC linac, and a charge-stripper system. The LEBT system for the RISP accelerator facility consists of a high-voltage platform, two 90° dipoles, a multi-harmonic buncher (MHB), solenoids, electrostatic quadrupoles, a velocity equalizer, and a diagnostic system. The ECR ion sources are located on a high-voltage platform to reach an initial beam energy of 10 keV/u. After extraction, the ion beam is transported through the LEBT system to the RFQ accelerator. The generated charge states are selected by an achromatic bending system and then bunched by the MHB in the LEBT system. The MHB is used to achieve a small longitudinal emittance in the RFQ by generating a sawtooth wave with three harmonics. Here, we present the resultsmore »« less

Authors:

Bahng, Jungbae ^[1]; Qiang, Ji ^[2]; Kim, Eun-San ^[3]

Kyungpook National Univ., Daegu (Korea)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Korea Univ, Sejong (Korea)

Publication Date:: Fri Sep 25 00:00:00 EDT 2015

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1576494

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

Additional Journal Information:: Journal Volume: 804; Journal Issue: C; Journal ID: ISSN 0168-9002

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; low-energy beam transport; heavy ion accelerator; multi-harmonic buncher

Citation Formats


                    Bahng, Jungbae, Qiang, Ji, and Kim, Eun-San. Design study of low-energy beam transport for multi-charge beams at RAON.  United States: N. p., 2015. 
Web.  doi:10.1016/j.nima.2015.09.041.

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                    Bahng, Jungbae, Qiang, Ji, & Kim, Eun-San. Design study of low-energy beam transport for multi-charge beams at RAON.  United States.  https://doi.org/10.1016/j.nima.2015.09.041

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                    Bahng, Jungbae, Qiang, Ji, and Kim, Eun-San. Fri .  
"Design study of low-energy beam transport for multi-charge beams at RAON".  United States.  https://doi.org/10.1016/j.nima.2015.09.041.  https://www.osti.gov/servlets/purl/1576494.

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@article{osti_1576494,

  title        = {Design study of low-energy beam transport for multi-charge beams at RAON},

  author       = {Bahng, Jungbae and Qiang, Ji and Kim, Eun-San},

  abstractNote = {The Rare isotope Accelerator Of Newness (RAON) at the Rare Isotope Science Project (RISP) is being designed to simultaneously accelerate beams with multiple charge states. It includes a driver superconducting (SC) linac for producing 200 MeV/u and 400 kW continuous wave (CW) heavy ion beams from protons to uranium. The RAON consists of a few electron cyclotron resonance ion sources, a low-energy beam transport (LEBT) system, a CW 81.25 MHz, 500 keV/u radio frequency quadrupole (RFQ) accelerator, a medium-energy beam transport system, the SC linac, and a charge-stripper system. The LEBT system for the RISP accelerator facility consists of a high-voltage platform, two 90° dipoles, a multi-harmonic buncher (MHB), solenoids, electrostatic quadrupoles, a velocity equalizer, and a diagnostic system. The ECR ion sources are located on a high-voltage platform to reach an initial beam energy of 10 keV/u. After extraction, the ion beam is transported through the LEBT system to the RFQ accelerator. The generated charge states are selected by an achromatic bending system and then bunched by the MHB in the LEBT system. The MHB is used to achieve a small longitudinal emittance in the RFQ by generating a sawtooth wave with three harmonics. Here, we present the results and issues of the beam dynamics of the LEBT system.},

  doi          = {10.1016/j.nima.2015.09.041},

  journal      = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},

  number       = C,

  volume       = 804,

  place        = {United States},

  year         = {Fri Sep 25 00:00:00 EDT 2015},

  month        = {Fri Sep 25 00:00:00 EDT 2015}

}

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