Overview of RAON Beam Instrumentation System and Construction Status of the Low-Energy Linac
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Y.S. Chung, G.D. Kim, J.W. Kwon, H.J. Woo
IBS, Daejeon, Republic of Korea
E.H. Lim
Korea University Sejong Campus, Sejong, Republic of Korea
RAON is a heavy ion accelerator for researches using Rare Isotopes (RI) as a major research facility in Korea. RAON uses both In-flight Fragmentation and Isotope Separation On-Line methods to provide various RI beams. The ultimate goal of the driver Linac of RAON is to accelerate uranium and proton beams up to 200 MeV/u and 600 MeV, with a maximum beam currents of 8.3 pA and 660 pA, respectively. After 9 years of RAON construction, commissioning of the low-energy Linac front-end system that consists of 14.5 GHz ion source, low energy beam transport, a 500 keV/u radio frequency quadrupole, and medium energy beam transport has been carried out since late 2020. And beam injection to the low-energy superconducting Linac is planned to start in December 2021. Here, we introduce RAON beam instrumentation and diagnostics systems as well as the construction status of the low-energy Linac.
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J.W. Kwon, Y.S. Chung, G.D. Kim, H.J. Woo
IBS, Daejeon, Republic of Korea
E.H. Lim
Korea University Sejong Campus, Sejong, Republic of Korea
RAON (Rare isotope accelerator complex for On-line experiments) is accelerator to accelerate heavy ion such as uranium, oxygen, and proton. At P2DT(Post to Driver linac Transport line) section where is located between SCL3 and SCL2, particle beam would be higher charge state by stripper. In bending area in P2DT, BPM(Beam Position Monitor) should accept the beam that has large size (~10 cm) horizontally. Required BPM transverse position resolution is 150 um. We simulated Large type BPM with CST particle studio. Fabricated LBPM was tested on the developed wire test bench that could move BPM for width of ±80 mm, height of ±40 mm with manual steering knob.
E.H. Lim
Korea University Sejong Campus, Sejong, Republic of Korea
Y.S. Chung, G.D. Kim, J.W. Kwon, H.J. Woo
IBS, Daejeon, Republic of Korea
E.-S. Kim
KUS, Sejong, Republic of Korea
RAON has various diagnostic devices for measuring beam characteristics, such as Faraday Cup, Wire Scanner, and Beam Loss Monitor, etc. Each device is driven by PLC system and acquires current data with a DAQ based uTCA system. All the parameters are controlled by EPICS as process variables (PV) and monitored on GUI of CS-Studio. PVs of PLC and DAQ were named according to the RAON naming convention. Epics sequences are written in finite state machine code to work diagnostic device sequentially. Below we show the working principle of the epics based diagnostics devices control system and measurement results.
