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Beam transport calculation and beamline design for μSR facility in RAON

Title
Beam transport calculation and beamline design for μSR facility in RAON
Author
김용균
Keywords
Beam-line design; Muon facility; μSR; Surface muons; Beam transport; Single-particle tracking
Issue Date
2020-12
Publisher
한국원자력학회
Citation
Nuclear Engineering and Technology, v. 53, no. 10, page. 3344-3351
Abstract
The Rare Isotope Science Project was launched in 2011 in Korea toward constructing the Rare isotope Accelerator complex for ON line experiments (RAON). RAON will house several experimental systems, including the Muon Spin Rotation/Relaxation/Resonance (μSR) facility in High Energy Experimental Building B. This facility will use 600-MeV protons with a maximum current of 660 pμA and beam power of 400 kW. The key μSR features will facilitate projects related to condensed-matter and nuclear physics. Typical experiments require a few million surface muons fully spin-polarized opposite to their momentum for application to small samples. Here, we describe the design of a muon transport beam line for delivering the requisite muon numbers and the electromagnetic-component specifications in the μSR facility. We determine the beam-line configuration via beam-optics calculations and the transmission efficiency via single-particle tracking simulations. The electromagnet properties, including fringe field effects, are applied for each component in the calculations. The designed surface-muon beamline is 17.3 m long, consisting of 2 solenoids, 2 dipoles affording 70° deflection, 9 quadrupoles, and a Wien filter to eliminate contaminant positrons. The average incident-muon flux and spin rotation angle are estimated as 5.2 × 106 μ+/s and 45°, respectively.
URI
https://www.sciencedirect.com/science/article/pii/S1738573321002485?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/174985
ISSN
1738-5733
DOI
10.1016/j.net.2021.04.028
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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