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Technical design of an IH-type buncher for KoBRA at RAON
Hoeltermann H.,Ratzinger U.,Schweizer W.,Strehl D.,Schwarz M.,Haehnel H.,Tshoo Kyoungho,Ham C.,Kwak D.,Shin T. S.,Yoon D. 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.83 No.8
To satisfy the beam requirement of the KoBRA experiment (0.5 nsec in 1σ), rebunching is required in the energy range up to 15 A MeV and for particles with an A/q range from 1 to 7. In cooperation with IBS and Hanmac Corporation, BEVATECH proposed a five-gap IH-buncher cavity which has excellent bunching properties from 5 to 15 MeV/u. Main challenges in this project are the wide energy range and CW operation at RF power levels up to 20 kW. The cavity will offer an effective voltage amplitude of up to 1 MV. To provide the required cooling channels and cooling efficiency, the stems and drifttubes of this cavity will be 3D printed. This paper will discuss the technical design approach and give a status on the development of the buncher cavity.
Commissioning preparation of RAON rare isotope accelerator facility
정연세,Hong Seung-Woo,장현만,Ki Tae-Kyung,Kim Hyoung-Jin,Kim Young Jin,권면,Lee Jinho,Tshoo Kyoungho,Shin Taeksu 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.82 No.6
RAON (Rare isotope Accelerator complex for ON-line experiments), started by the Rare Isotope Science Project (RISP) in Dec 2011, is the fagship rare isotope accelerator facility in Korea to promote the fundamental science of rare isotopes and the application. The construction of facility buildings and installation of the low-energy superconducting linac (SCL3) including injector system, ISOL (Isotope Separation On-Line) for the rare isotope production, a recoil spectrometer KoBRA, and MR-TOF for the mass measurement system were fnished in 2021. Expecting the completion of the frst phase of the RAON construction project in 2022, the beam commissioning experiments of low-energy superconducting linac (SCL3) and the ISOL system are underway. The status and overview of the RAON accelerator facility are reported in this paper.
Large area PPAC development at the Rare Isotope Science Project
Akers, Charles,Lee, Kwang Bok,Kim, Young Jin,Hashimoto, Takashi,Kim, Eun Hee,Lee, Hyo Sang,Park, Jin Hyung,Ryu, Min Sang,Tshoo, Kyoungho,Kang, Byoung Hwi,Kwon, Young Kwan Elsevier 2018 Nuclear Instruments & Methods in Physics Research. Vol.910 No.-
<P><B>Abstract</B></P> <P>Large area position sensitive parallel plate avalanche counters (PPACs) have been fabricated for the Rare Isotope Science Project. These detectors have active areas of 20 × 20 cm<SUP>2</SUP> and 40 × 20 cm<SUP>2</SUP>, and utilize a stripped electrode structure, together with a delay-line readout, to extract position information. The 20 × 20 cm<SUP>2</SUP> detector performance was tested with 3 MeV/u <SUP>12</SUP>C and <SUP>16</SUP>O beams. A position resolution better than 1 mm, full width at half maximum, and a detection efficiency of 94% were measured with an incident beam intensity of 2 × 10<SUP>6</SUP> particles per second. A new production technique, using photolithography, that makes the fabrication of stripped PPAC electrodes larger in area than was previously possible, is also presented.</P>