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arXiv 2210.07752physics.acc-ph
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费米实验室长基线中微子装置的优化研究

Optimization Studies for the Long-Baseline Neutrino Facility at Fermilab

Igor Rakhno, Nikolai Mokhov, Igor Tropin, Sergei Striganov

摘要:

深层地下中微子实验和长基线中微子设施(DUNE-LBNF)自2010年代初以来一直在费米实验室开发[1]。目前,美国能源部(DOE)正在进行全面审查-关键决定2(CD-2)-计划于2022年年中进行。DUNE的主要科学目标是对中微子振荡进行全面调查,以测试轻子部分的CP破坏,确定中微子质量的顺序,并测试三中微子范式(电子、μ子和τ中微子)。LBNF将利用新的800 MeV超导直线加速器在中微子产生靶上提供120 GeV质子束,该超导直线加速器预计将于2027年完成[2]。中微子束线是LBNF的核心组成部分,它利用了靶和喇叭系统、衰变管、强子吸收器和其他系统。目前,作为无数次迭代的结果,存在一个1.5米的石墨靶和由三个喇叭组成的聚焦系统的优化设计。进一步优化能量沉积和放射性计算,对CD-2和超越。本文描述了最新MARS 15 [3]优化研究的结果。

英文摘要:

The Deep Underground Neutrino Experiment and Long-Baseline Neutrino Facility (DUNE-LBNF) are under development at Fermilab since early 2010s [1]. At present, the work is being performed towards a comprehensive review conducted by US Department of Energy (DOE)-the Critical Decision 2 (CD-2)-that is planned to take place in the middle of 2022. The primary scientific objectives of DUNE are to carry out a comprehensive investigation of neutrino oscillations to test CP violation in the lepton sector, determine the ordering of the neutrino masses, and to test the three-neutrino paradigm (electron, muon and tau neutrino). The LBNF will provide a 120-GeV proton beam on a neutrino production target utilizing a new 800-MeV superconducting Linac which is expected to be completed in 2027 [2]. The neutrino beamline, which utilizes a target and horn systems, decay pipe, hadron absorber and other systems, is a core component of the LBNF. At present-as a result of numerous iterations-there exists an optimized design with a 1.5-m graphite target and focusing system consisting of three horns. Further optimization energy deposition and radiological calculations are performed towards CD-2 and beyond. This paper describes results of the most recent MARS15 [3] optimization studies.

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