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arXiv 2007.15609physics.ins-dethep-ex
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用高压气体时间投影室测量低动量质子的CERN T10束流的离轴特性

Off-Axis Characterisation of the CERN T10 Beam for low Momentum Proton Measurements with a High Pressure Gas Time Projection Chamber

S. B. Jones, T. S. Nonnenmacher, E. Atkin, G. J. Barker, A. Basharina-Freshville, C. Betancourt, S. B. Boyd, D. Brailsford, Z. Chen-Wishart, L. Cremonesi, A. De… 展开作者

S. B. Jones, T. S. Nonnenmacher, E. Atkin, G. J. Barker, A. Basharina-Freshville, C. Betancourt, S. B. Boyd, D. Brailsford, Z. Chen-Wishart, L. Cremonesi, A. Deisting, A. Dias, P. Dunne, J. Haigh, P. Hamacher-Baumann, A. Kaboth, A. Korzenev, W. Ma, P. Mermod, M. Mironova, J. Monroe, R. Nichol, J. Nowak, W. Parker, H. Ritchie-Yates, S. Roth, R. Saakyan, N. Serra, Y. Shitov, J. Steinmann, A. Tarrant, M. A. Uchida, S. Valder, A. V. Waldron, M. Ward, M. O. Wascko

摘要:

我们目前的研究质子通量在T10束线在欧洲核子研究中心。将原型高压气体时间投影室(TPC)暴露于质子和其他粒子束,使用T10中的0.8GeV/c动量设置,以便进行氩中低能质子的截面测量。为了探索在振荡实验中由GeV尺度中微子相互作用产生的强子的能量区域,即,在接近0.1GeV的动能时,采用了慢化T10束的方法:使用丙烯酸块慢化束和测量偏离束轴的散射质子的双重技术来降低入射质子的动能,以及改变入射通量的质子/最小电离粒子(MIP)组成。使用TPC上游和下游的飞行时间系统进行光束特性的测量。到达TPC的质子的动能被成功地从没有减速器块的$\sim0.3$ GeV改变到具有四个减速器块(40 cm路径长度)的小于0.1 GeV。质子和MIP离开束轴的通量增加。质子与MIP的比率作为离轴角的函数而变化,允许检测器的可能优化以选择所需粒子的类型。由飞行时间测量得到的模拟结果表明,在束线中放置了四个减速器块,($5.6 \pm 0.1$)能量低于0.1 GeV的质子每次溢出穿过活动TPC区域。测量的光束成分和能量。

英文摘要:

We present studies of proton fluxes in the T10 beamline at CERN. A prototype high pressure gas time projection chamber (TPC) was exposed to the beam of protons and other particles, using the 0.8 GeV/c momentum setting in T10, in order to make cross section measurements of low energy protons in argon. To explore the energy region comparable to hadrons produced by GeV-scale neutrino interactions at oscillation experiments, i.e., near 0.1 GeV of kinetic energy, methods of moderating the T10 beam were employed: the dual technique of moderating the beam with acrylic blocks and measuring scattered protons off the beam axis was used to decrease the kinetic energy of incident protons, as well as change the proton/minimum ionising particle (MIP) composition of the incident flux. Measurements of the beam properties were made using time of flight systems upstream and downstream of the TPC. The kinetic energy of protons reaching the TPC was successfully changed from $\sim0.3$ GeV without moderator blocks to less than 0.1 GeV with four moderator blocks (40 cm path length). The flux of both protons and MIPs off the beam axis was increased. The ratio of protons to MIPs vary as a function of the off-axis angle allowing for possible optimisation of the detector to select the type of required particles. Simulation informed by the time of flight measurements show that with four moderator blocks placed in the beamline, ($5.6 \pm 0.1$) protons with energies below 0.1 GeV per spill traversed the active TPC region. Measurements of the beam composition and energy are presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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