A novel electrical method to measure wire tensions for time projection chambers
A novel electrical method to measure wire tensions for time projection chambers
复制标题
DOI：
10.1016/j.nima.2018.09.031
复制
发表时间：
2018-04
期刊：
影响因子：
--
通讯作者：
D. Garcia-Gamez;V. Basque;Thomas G. Brooks;Justin J. Evans;Michael Perry;S. Söldner-Rembold;F. Spa
中科院分区：
文献类型：
--
作者：
D. Garcia-Gamez;V. Basque;Thomas G. Brooks;Justin J. Evans;Michael Perry;S. Söldner-Rembold;F. Spa
提出了一种新的电学方法来测量多丝漂移室中丝的张力。我们通过在交流信号上叠加正负直流电压（V AC±V DC）来偏置测试导线两侧的相邻导线，从而产生交变电场。由此产生的导线振荡将在其自然频率下显示共振，并且电容的相应变化将导致可测量的电流。该方案可扩展到多根导线，因此使我们能够在短时间内精确测量大量导线的张力。这种技术也可以在低温下应用，使其成为未来大型时间投影室（如DUNE探测器）的有吸引力的解决方案。我们提出的概念，一个例子的实施和它的性能在现实世界中的情况下，并讨论了电压和电线长度方面的系统的灵敏度的限制。
We present a novel electrical technique to measure the tension of wires in multi-wire drift chambers. We create alternating electric fields by biasing adjacent wires on both sides of a test wire with a superposition of positive and negative DC voltages on an AC signal (V AC±V DC). The resulting oscillations of the wire will display a resonance at its natural frequency, and the corresponding change of the capacitance will lead to a measurable current. This scheme is scalable to multiple wires and therefore enables us to precisely measure the tension of a large number of wires in a short time. This technique can also be applied at cryogenic temperatures making it an attractive solution for future large time-projection chambers such as the DUNE detector. We present the concept, an example implementation and its performance in a real-world scenario and discuss the limitations of the sensitivity of the system in terms of voltage and wire length.