Advances on a cryogen-free Vuilleumier type pulse tube cryocooler [PDF]
Cryogenics, 2017 This paper presents experimental results and numerical evaluation of a Vuilleumier (VM) type pulse tube cryocooler. The cryocooler consists of three main subsystems: a thermal compressor, a low temperature pulse tube cryocooler, and a Stirling type precooler.
Xiaotao Wang +2 more
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Vibration Property of a Cryogenic Optical Resonator within a Pulse-Tube Cryostat [PDF]
Sensors, 2021 Cryogenic ultrastable laser cavities push laser stability to new levels due to their lower thermal noise limitation. Vibrational noise is one of the major obstacles to achieve a thermal-noise-limited cryogenic ultrastable laser system. Here, we carefully
Yanxia Ye +6 more
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Cryogenic sapphire oscillator using a low- vibration design pulse-tube cryocooler: first results [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2010 5 pages, 5 figures, accepted in IEEE Trans on Ultrasonics, Ferroelectrics and Frequency ...
John Hartnett, Jean-Michel le Floch
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Ultra-Low Vibration Pulse-Tube Cryocooler Stabilized Cryogenic Sapphire Oscillator With ${\hbox{10}}^{-16}$ Fractional Frequency Stability [PDF]
IEEE Transactions on Microwave Theory and Techniques, 2010 A low maintenance long-term operational cryogenic sapphire oscillator has been implemented at 11.2 GHz using an ultra-low-vibration cryostat and pulse-tube cryocooler. It is currently the world's most stable microwave oscillator employing a cryocooler. Its performance is explained in terms of temperature and frequency stability. The phase noise and the
Hartnett, John G., Nand, Nitin R.
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The Performance of Pulse Tube Cryogenic Cryocooler with Multi-metal-mesh Filled Regenerator
Zhileng xuebao, 2015 As the key component of the pulse tuber cryocooler, the regenerator plays a vital role on the thermal performance. In order to analyze the effect of the filled metal meshes on the thermal performance of regenerator, the real single-stage pulse tube ...
Kan Ankang, Zhang Ankuo, Wu Yinong
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A cryogenic tensile testing apparatus for micro-samples cooled by miniature pulse tube cryocooler
IOP Conference Series: Materials Science and Engineering, 2015 This paper introduces a cryogenic tensile testing apparatus for micro-samples cooled by a miniature pulse tube cryocooler. At present, tensile tests are widely applied to measure the mechanical properties of materials; most of the cryogenic tensile testing apparatus are designed for samples with standard sizes, while for non-standard size samples ...
L B Chen, S X Liu
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Active suppression of temperature oscillation from a pulse-tube cryocooler in a cryogen-free cryostat: Part 2. Experimental realization [PDF]
Cryogenics, 2020 A cryogen-free cryostat cooled by a closed cycle cryocooler is compact, can provide uninterrupted long-term operation (up to ten thousand hours) and is suited to temperatures from 3 K to 300 K. Its intrinsic temperature oscillation, however, limits its application in experiments requiring high thermal stability at low temperature (below 77 K).
Pan, Changzhao +11 more
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Active suppression of temperature oscillation from a pulse-tube cryocooler in a cryogen-free cryostat: Part 1. Simulation modeling from thermal response characteristics [PDF]
Cryogenics, 2020 16 pages, 10 ...
Pan, Changzhao +11 more
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A Cryogen Recycler with Pulse Tube Cryocooler for Recondensing Helium and Nitrogen
IOP Conference Series: Materials Science and Engineering, 2015 We have developed a cryogen recycler using a 4 K pulse tube cryocooler for recondensing helium and nitrogen in a NMR magnet. The liquid helium cooled NMR magnet has a liquid nitrogen cooled radiation shield. The magnet boils off 0.84 L/day of liquid helium and 6 L/day of liquid nitrogen.
C Wang, B Lichtenwalter
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Autonomous cryogenic sapphire oscillators employing low vibration pulse-tube cryocoolers at NMIJ
Journal of Physics: Conference Series, 2016 Two liquid-helium-cooled cryogenic sapphire-resonator oscillators (CSOs), have been modified to operate using cryo-refrigerators and low-vibration cryostats. The Allan deviation of the first CSO was evaluated to be better than 2 x 10-15 for averaging times of 1 s to 30 000 s, which is better than that of the original liquid helium cooled CSO. The Allan
Takeshi Ikegami +4 more
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