NEXT 双贝塔衰变实验追踪读出系统的放射性纯度评估
仪器与探测器
2015-06-24 v2 高能物理 - 实验
核实验
摘要
利用氙时间投影室的中微子实验（NEXT）旨在研究 的无中微子双贝塔衰变，这需要严格抑制潜在本底；因此，正在进行广泛的筛选和选择过程，以控制 NEXT 实验装置中所用材料的放射性纯度水平。该探测器设计结合了对事件拓扑特征的测量以进行本底鉴别，并优化了能量分辨率。独立的能量和追踪读出平面基于不同的传感器：用于量热法的光电倍增管和用于追踪的硅多像素光子计数器。设计一个与气体探测器介质直接接触的放射性纯净追踪平面特别具有挑战性，因为根据数据库和文献中的现有信息，所需的组件（如印刷电路板、连接器、传感器或电容器）通常具有过高的活度，无法满足需要超低本底条件的实验要求。本文描述了在西班牙 Canfranc 地下实验室（Laboratorio Subterraneo de Canfranc）利用超低本底锗探测器通过伽马射线能谱学对追踪读出组件进行的放射性纯度评估。根据所得结果，已识别出由聚酰亚胺（kapton）和铜制成的印刷电路板、硅光电倍增管以及其他所需组件，其放射性纯度足以满足感兴趣区域的整体本底水平不超过 的要求。
引用
@article{arxiv.1411.1433,
title = {Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment},
author = {S. Cebrián and J. Pérez and I. Bandac and L. Labarga and V. Álvarez and A. I. Barrado and A. Bettini and F. I. G. M. Borges and M. Camargo and S. Cárcel and A. Cervera and C. A. N. Conde and E. Conde and T. Dafni and J. Díaz and R. Esteve and L. M. P. Fernandes and M. Fernández and P. Ferrario and A. L. Ferreira and E. D. C. Freitas and V. M. Gehman and A. Goldschmidt and J. J. Gómez-Cadenas and D. González-Díaz and R. M. Gutiérrez and J. Hauptman and J. A. Hernando Morata and D. C. Herrera and I. G. Irastorza and A. Laing and I. Liubarsky and N. López-March and D. Lorca and M. Losada and G. Luzón and A. Marí and J. Martín-Albo and A. Martínez and G. Martínez-Lema and T. Miller and F. Monrabal and M. Monserrate and C. M. B. Monteiro and F. J. Mora and L. M. Moutinho and J. Muñoz Vidal and M. Nebot-Guinot and D. Nygren and C. A. B. Oliveira and A. Ortiz de Solórzano and J. L. Pérez Aparicio and M. Querol and J. Renner and L. Ripoll and J. Rodríguez and F. P. Santos and J. M. F. dos Santos and L. Serra and D. Shuman and A. Simón and C. Sofka and M. Sorel and J. F. Toledo and J. Torrent and Z. Tsamalaidze and J. F. C. A. Veloso and J. A. Villar and R. C. Webb and J. T. White and N. Yahlali},
journal= {arXiv preprint arXiv:1411.1433},
year = {2015}
}