Enthalpy—pressure (H-p) diagram of He3 in the range 1.0 K ≤ T ≤ 4.17 K and 0 ≤ p ≤ 6.5 atm and inversion curve for T ≤ 4.17 K

Kraus, Jürgen; Uhlig, E.; Wiedemann, W.

doi:10.1016/0011-2275(74)90041-1

Cited by 24 publications

(5 citation statements)

References 4 publications

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“…In order to keep all the data consistent, in Fig. 6, Rauch's data have been shifted with Here, we also check the agreement between Kraus' simple plots [2] and ours. Obviously different reference values for enthalpy are used.…”

Section: Accuracy Analysesmentioning

confidence: 73%

“…This represents only a first approximation to the thermodynamic data for 3 He, and it was difficult to assess the accuracy of the data, and moreover, interpolation of the data either between isobars or between isenthalps was also very difficult. Kraus et al [2] experimentally obtained the isotherms in a p-h diagram of 3 He in the range 1.0 K ≤ T ≤ 4.17 K and 0 ≤ p ≤ 0.65 MPa by means of the isothermal throttle effect. It was claimed that the diagram was determined with an error of 5 %.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Diagrams of 3He from 0.2 K to 300 K Based Upon its Debye Fluid Equation of State

2010

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On the basis of the equation of state and the phase equilibrium equations of helium-3 ( 3 He), a computer program for calculating the thermodynamic properties of 3 He has been created. With this program, many iso-property tables were prepared for generating p-h and T-s diagrams of 3 He over the range of temperature from 0.2 K to 300 K and pressures up to 300 MPa. Compared with the previous diagrams plotted with interpolated experimental data sets, the new ones are more thermodynamically consistent and cover a broader temperature and pressure range. The estimated overall random errors of the diagrams are within 2 %.

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Section: Accuracy Analysesmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Thermodynamic Diagrams of 3He from 0.2 K to 300 K Based Upon its Debye Fluid Equation of State

2010

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“…By warming up the pump to room temperatures, we can transfer high pressure gas to the cryostat. Condensation of 3 He gas occurs based on the pressure-temperature phase diagram 18,19) . The critical temperature at 1 bar is 3.2 K and therefore we can liquefy 3 He gas by introducing 3 He gas at ~ 1 bar to the cryostat maintained at 3 K. Not only that, but we can also liquefy 3 He gas more efficiently at 3 K than at 2 K. This is because the cooling power of 4 He evaporation is larger owing to larger latent heat and higher vapor pressure at 3 K than those at 2 K 18) .…”

Section: Standard Procedures Of Condensation and Coolingmentioning

confidence: 99%

“…Condensation of 3 He gas occurs based on the pressuretemperature phase diagram. 18,19) The critical temperature at 1 bar is 3.2 K and therefore we can liquefy 3 He gas by introducing 3 He gas at ∼1 bar to the cryostat maintained at 3 K. Not only that, but we can also liquefy 3 He gas more efficiently at 3 K than at 2 K. This is because the cooling power of 4 He evaporation is larger owing to larger latent heat and higher vapor pressure at 3 K than those at 2 K. 18) We can also make use of the large enthalpy of cold 3 He gas to cool down well the low-temperature parts of the cryostat. This leads considerable reduction of residual heat which often remains at the stainless-steel pipe in the IVC and 3 He-pot thermometer leads whose thermal conductivities are bad.…”

Section: Standard Procedures Of Condensation and Coolingmentioning

confidence: 99%

Precise magnetization measurements down to 500 mK using a miniature ³He cryostat and a closed-cycle ³He gas handling system installed in a SQUID magnetometer without continuous-cooling functionality

Shimamura¹,

Wajima²,

Makino³

et al. 2022

Jpn. J. Appl. Phys.

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We have conducted precise magnetization measurements down to 0.5 K with a miniature 3He cryostat and high-pressure-compatible 3He gas handling system for a commercial superconducting quantum interference device magnetometer [Magnetic Property Measurement System (Quantum Design)]. The gas handling system contains two sorption pumps filled with granular charcoals. We pressurize 3He gas up to ambient pressure for the liquification at 3 K and then pump the vaper for cooling. The lowest sample temperature is ~ 0.5 K and it can persist for 34 hours. We demonstrate the performance of the system by observing the Meissner effect of aluminum below the superconducting transition temperature ~ 1 K. We also measured the magnetization curve of the heavy fermion superconductor CeCoIn5 resulting in successful observation of the lower critical field at 0.5 K.

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“…The red dashed lines depict the process of3 He condensation by JT condenser. The figure is regenerated from Refs [31,32]…”

mentioning

confidence: 99%

Development of a cryogen-free dilution refrigerator

Fan²,

T.³

et al. 2022

Chinese Phys. B

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With thermal fluctuation strongly suppressed, low temperature environment is essential for studies of condensed matter physics and developments of quantum technologies. Ultra-low temperature below 20 mK has demonstrated its importance and significance in physical sciences and information techniques. Dilution refrigeration is by far the best feasible and reliable method to generate and keep lattice temperature in this range. With a potential shortage of helium supply, cryogen-free dilution refrigerator (CFDR), eliminating the necessity of regular helium refill, becomes the main facility for the purpose of creating ultralow temperature environments. Here we describe our successful construction of a CFDR which reached a base temperature of around 10.9 mK for continuous circulation and 8.6 mK for single-shot operation. We describe its operating mechanism and the designs of key components, especially some unique designs including heat switch and alumina thermal link. Possible improvements in the future are also discussed.

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Enthalpy—pressure (H-p) diagram of He3 in the range 1.0 K ≤ T ≤ 4.17 K and 0 ≤ p ≤ 6.5 atm and inversion curve for T ≤ 4.17 K

Cited by 24 publications

References 4 publications

Thermodynamic Diagrams of 3He from 0.2 K to 300 K Based Upon its Debye Fluid Equation of State

Thermodynamic Diagrams of 3He from 0.2 K to 300 K Based Upon its Debye Fluid Equation of State

Precise magnetization measurements down to 500 mK using a miniature ³He cryostat and a closed-cycle ³He gas handling system installed in a SQUID magnetometer without continuous-cooling functionality

Development of a cryogen-free dilution refrigerator

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Enthalpy—pressure (H-p) diagram of He3 in the range 1.0 K ≤ T ≤ 4.17 K and 0 ≤ p ≤ 6.5 atm and inversion curve for T ≤ 4.17 K

Cited by 24 publications

References 4 publications

Thermodynamic Diagrams of 3He from 0.2 K to 300 K Based Upon its Debye Fluid Equation of State

Thermodynamic Diagrams of 3He from 0.2 K to 300 K Based Upon its Debye Fluid Equation of State

Precise magnetization measurements down to 500 mK using a miniature 3He cryostat and a closed-cycle 3He gas handling system installed in a SQUID magnetometer without continuous-cooling functionality

Development of a cryogen-free dilution refrigerator

Contact Info

Product

Resources

About

Precise magnetization measurements down to 500 mK using a miniature ³He cryostat and a closed-cycle ³He gas handling system installed in a SQUID magnetometer without continuous-cooling functionality