This SIS mixer receiver is reliable, and can achieve good noise performance even operated at 4.3k temperature with a close cycle helium refrigerator.
这种SIS混频接收机性能可靠，且可用闭合循环氦制冷机冷却，在4.3K温度操作即可达到好的噪声性能。
The optimum parameters of the refrigeration cycle have been given and the influence of the helium gas transmission pipe has been discussed.
讨论了氦气传输管对于流程参数的影响及补偿措施。
Under the same discharge conditions, the numbers of current pulses per half cycle for helium discharge are more than that for argon discharge.
实验表明，氩气放电相邻脉冲之间的瞬时电压间隔是稳定的，而氦气的却是起伏变化的。
Under the same discharge conditions, the numbers of current pulses per half cycle for helium discharge are more than that for argon discharge.
实验表明，氩气放电相邻脉冲之间的瞬时电压间隔是稳定的，而氦气的却是起伏变化的。
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