Development of prototype RICH detector with multi-anode photomultipliers for radioactive ions-猫眼课题宝

开发带有多阳极光电倍增管的放射性离子原型 RICH 探测器

DOI：

10.1016/j.nima.2019.03.085

发表时间：

2019

期刊：

Nuclear Instr & Meth.

影响因子：

通讯作者：

中科院分区：

文献类型：

作者：

D.Nishimura;M.Fukuda;S.Yagi. T.Sugihara,T.Suzuki;他41名

RI-RICH 是一种用于放射性离子的环形成像切伦科夫计数器，旨在测量中等能量离子的速度。我们的 RI-RICH 系统由六个覆盖有 360 nm 带通滤波器的多阳极光电倍增管和一个由石英或 BK7 制成的散热器组成。对于速度为 β= 0. 712 的初级 132 Xe 束，获得了 Δ β∕ β= 4. 9× 1 0− 4 （一个标准差 σ）的速度分辨率和超过 99.99% 的检测效率。对于 Z= 44–55 且 β≃ 0. 70 的次光束，我们使用 B ρ-Δ E-β 方法成功地进行了粒子识别。这些核素的 RI-RICH 速度分辨率相当于质量数的 6 σ 以上分离。

RI-RICH, a ring-imaging Cherenkov counter for radioactive ions, has been developed to measure the velocity of the ions at intermediate energies. Our RI-RICH system consists of six multi-anode photomultiplier tubes covered with 360-nm bandpass filters and a radiator made of quartz or BK7. For the primary 132 Xe beam with a velocity of β= 0. 712, a velocity resolution of Δ β∕ β= 4. 9× 1 0− 4 (one standard deviation σ) and a detection efficiency of more than 99.99% were achieved. For the secondary beams with Z= 44–55 and β≃ 0. 70, we successfully performed particle identification using the B ρ-Δ E-β method. The velocity resolutions of RI-RICH for these nuclides were equivalent to a more than 6 σ separation for the mass number.