Portero-Rodríguez Diego, García-Vázquez Hugo, Martínez-Rodríguez José Luis, Hernández Alonso Sergio Elías, Joven Álvarez Enrique, Hoyland Roger John, Díaz García José Javier, Rodríguez Ramos Luis Fernando
Laboratorio de Circuitos Integrados (LABIC), Departamento de Electrónica, Área de Instrumentación, Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain.
Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, Spain.
Sensors (Basel). 2024 Dec 19;24(24):8129. doi: 10.3390/s24248129.
The use of non-cryogenic certified commercial electronics for cryogenic applications may be attractive due to their cost and availability, but it also carries risks related to reliability, performance and thermal compatibility. The decision to use commercial components that are not certified for cryogenics instead of components specifically designed for such applications must be carefully weighed based on specific project needs and risk tolerances. This work presents the characterisation of an attenuator circuit at cryogenic temperatures used in a microwave kinetic inductance detector (MKID) readout system. In order to characterise the operation of the attenuator at cryogenic temperatures and because the circuit works at frequencies up to 40 GHz, a specific microwave PCB has been designed. The cooling system used consists of a cryostat, all the connectors, cables, a vacuum pump, a compressor, pressure and temperature sensors, a temperature control system and a cold head operating in a closed helium gas cycle according to the Gifford-McMahon principle. The circuit was tested and characterised at temperatures ranging from 296.5 K to 83.6 K.
将非低温认证的商用电子产品用于低温应用，因其成本和可得性可能颇具吸引力，但同时也存在与可靠性、性能及热兼容性相关的风险。是否使用未经低温认证的商用组件而非专门为此类应用设计的组件，必须根据具体项目需求和风险承受能力进行仔细权衡。本文介绍了用于微波动态电感探测器（MKID）读出系统的低温衰减器电路的特性。为了表征该衰减器在低温下的运行情况，且由于该电路工作频率高达40 GHz，因此设计了一种特定的微波印刷电路板。所使用的冷却系统由低温恒温器、所有连接器、电缆、真空泵、压缩机、压力和温度传感器、温度控制系统以及一个根据吉福德 - 麦克马洪原理在封闭氦气循环中运行的冷头组成。该电路在296.5 K至83.6 K的温度范围内进行了测试和特性表征。
