Design study of pion and muon beam transport line for MOMENT

Design study of pion and muon beam transport line for MOMENT
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MOMENT介子和介子束传输线的设计研究

DOI:
10.1016/j.nima.2019.162907
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发表时间:
2020-01
期刊:
Nuclear Inst. andMethods in Physics Research, A
影响因子:
--
通讯作者:
Y. Bao
Y. Bao
中科院分区:
其他
文献类型:
--
作者:
Y.P. Song;H.T. Jing;J.Y. Tang;M. He;Y. Bao

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提出了一个μ介子衰变中基线中微子束装置(MOMENT),通过提供μ介子衰变产生的极高通量中微子而无需冷却和加速,用于轻子CP破坏的测定和其他潜在的中微子物理。MOMENT次级束线需要大的横向动量接受量,对束流动力学进行了详细的研究。基于大口径超导体超导体的束线由电荷选择段、π介子衰变通道、弯曲段、绝热锥段和μ介子衰变通道组成。为了提高粒子传输和中微子通量,同时保持150 km远探测器的低本底,在电荷选择和弯曲部分采用了附加垂直偶极场的弯曲双极场。同时还采用了绝热参数在不同截面之间的变化来增强中微子通量。模拟结果表明,远探测器的μ子反中微子通量可达4.1× 1011/m2/year,且中微子本底较低.
A MuOn-decay Medium-baseline NeuTrino beam facility (MOMENT) was proposed for the leptonic CP violation determination and other potential neutrino physics by offering extremely high flux neutrinos decayed from muons without cooling and acceleration. The huge transverse and large momentum acceptances are needed for the secondary beamline of MOMENT and the beam dynamics has been studied in detail. The whole beamline based on large-aperture superconducting solenoids is composed of several sections: charge selection section, pion decay channel, bending section, adiabatic taper and muon decay channel. To improve particles transmission and neutrino flux while maintaining low background at the far detector of 150 km, the curved solenoids with additional vertical dipole field are applied in the charge selection and bending sections. The adiabatic parameter changes between the sections are also adopted to enhance the neutrino flux. The end-to-end simulations have been carried out and the muon antineutrino flux at the far detector can reach 4.1× 10 11/m 2/year with a low background of unwanted neutrino species.
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