A tiltable single-shot miniature dilution refrigerator for astrophysical applications

作者：Melhuish Simon J^*; Martinis Lorenzo; Piccirillo Lucio

来源：Cryogenics, 2013, 55-56: 63-67.

DOI：10.1016/j.cryogenics.2013.03.002

• Dilution
• Sorption coolers
• He-3-He-4 mixtures
• Instrumentation

We present a He-3/He-4 dilution refrigerator designed for cooling astronomical mm-wave telescope receivers to around 100 mK. Used in combination with a Gifford-McMahon closed-cycle refrigerator, He-4 and He-3 sorption-pumped refrigerators, our cryogen-free system is capable of achieving 2 mu W cooling power at 87 mK. A receiver attached directly to the telescope optics is required to rotate with respect to the downward direction. This scenario, of variable tilt, has proved difficult for typical dilution refrigerators, but our design has a geometry chosen to allow tilt to 45 degrees and beyond.

• 出版日期2013-6