Vibration reduction for stirling cryocooler system

Chang-Hee Kim; Sanghyuk Kim; Ueejeong Jeong; Dohoon Kim

doi:10.1117/12.2566758

13 December 2020 Vibration reduction for stirling cryocooler system

Chang-Hee Kim, Sanghyuk Kim, Ueejeong Jeong, Dohoon Kim

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114513Q (2020) https://doi.org/10.1117/12.2566758
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

We undertake to build a new cross dispersed infrared spectrograph, whose design is a heritage of IGRINS, will be deployed at Gemini Telescope as facility instrument (IGRINS II). The Sunpower Cryotel GT cryocooler may be replaced with the current GM cooler in the future. The only drawback of using a stirling cryocooler is vibration and this may have a significant influence to astronomical instrument by decreasing the signal to noise ratio. On this test the induced vibration in all three axes were measured simultaneously on the external cyrostats bottom and internal cold stage linked to coldhead by a flexible thermal strap. The cryocooler was integrated with a compliant mount of the neoprene rubber or spring. The test was carried out with both the tuned vibration absorber (TVA) damper and active vibration cancellation (AVC) unit, when the temperature of cold stage went down to 70 K.

Citation Download Citation

Chang-Hee Kim, Sanghyuk Kim, Ueejeong Jeong, and Dohoon Kim "Vibration reduction for stirling cryocooler system", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114513Q (13 December 2020); https://doi.org/10.1117/12.2566758

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