The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to determine the effective mass of the electron antineutrino by investigating the tritium β-spectrum close to the energetic endpoint. To achieve this, there are stringent and challenging requirements on the stability of the gaseous tritium source. The tritium loop system has the task to provide the <0.1 % stabilized flow rate of tritium gas into the KATRIN source with a throughput of 40 g/day and a tritium purity>95 %. KATRIN started full tritium operation in early 2019. This paper focusses on the observed radiochemical effects and confirms that non-negligible quantities during initial tritium operation have to be expected.

卡尔斯鲁厄Tri中微子（KATRIN）实验旨在通过研究to高能the附近的β谱来确定电子抗中微子的有效质量。为了实现这一点，对气态source源的稳定性提出了严格而具有挑战性的要求。loop回路系统的任务是提供into0.1稳定的into气流入KATRIN源的流量，流量为40克/天，purity纯度> 95％。KATRIN于2019年初开始全面tri的运行。本文着重于观察到的放射化学效应，并确认在initial初始运行期间必须要有不可忽略的数量。