Journal of Low Temperature Physics最新文献_第2页

Strain Measurement Method Based on External Symmetrical Compensation Bridge Composed of Strain Gauges with Four-Wire Configuration for a Large-Scale NbTi Superconducting Dipole Magnet Detector 基于四线应变片外对称补偿桥的大型NbTi超导偶极磁体探测器应变测量方法

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-07-31 DOI: 10.1007/s10909-023-02989-9

Yongjie Zhang, Canjie Xin, Peifeng Gao, Tianhu He, Mingzhi Guan

{"title":"Strain Measurement Method Based on External Symmetrical Compensation Bridge Composed of Strain Gauges with Four-Wire Configuration for a Large-Scale NbTi Superconducting Dipole Magnet Detector","authors":"Yongjie Zhang, Canjie Xin, Peifeng Gao, Tianhu He, Mingzhi Guan","doi":"10.1007/s10909-023-02989-9","DOIUrl":"10.1007/s10909-023-02989-9","url":null,"abstract":"<div><p>This study presents a new strain measurement method based on an external symmetrical compensation bridge (ESCB) composed of strain gauges with a four-wire configuration. Unlike the traditional strain measurement methods, this method includes two features: first, utilising the four-wire configuration to eliminate measurement errors that occur due to large space-varying thermal and field imbalances of long signal wires during operation, and second, utilising two independent quarter-active sub-bridges with a four-wire configuration composed of ESCB to eliminate the errors that occur due to the large time-varying cryogenic temperature and magnetic field. This method was validated and used on a large-scale NbTi superconducting dipole magnet detector during the cooling, excitation, and quench tests. The strains measured using the ESCB were also compared with those measured using a traditional half-active compensation bridge. The observations showed that the ESCB method can overcome the interference of the temperature gradient and electromagnetic field of long wires during both cooling and electromagnetic excitation processes. In addition to the abrupt strain signal appearing when a quench occurred, high amplitudes occurring at high frequencies were observed at the onset of a quench based on the strain spectra analysis. Thus, the strain spectra are expected to provide a novel means for early quench warning.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"213 1-2","pages":"121 - 137"},"PeriodicalIF":2.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5177312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kelvin Waves, Mutual Friction, and Fluctuations in the Gross–Pitaevskii Model 格罗斯-皮塔耶夫斯基模型中的开尔文波、相互摩擦和波动

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-07-28 DOI: 10.1007/s10909-023-02985-z

Giorgio Krstulovic, Marc E. Brachet

引用次数: 0

Editorial for the Special Issue in Honor of Joe Vinen 纪念乔·维南特刊的社论

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-07-28 DOI: 10.1007/s10909-023-02988-w

Carlo F. Barenghi, Ladislav Skrbek

引用次数: 0

Optimized Cryogenic FBG Sensitivity Coefficient Calibration for High-Precision Thermal Expansion Measurements 用于高精度热膨胀测量的优化低温光纤光栅灵敏度系数校准

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-07-25 DOI: 10.1007/s10909-023-02980-4

Taolue Yang, Shi Liu, Yi Yang, Xinran Guo, Tao Tao

{"title":"Optimized Cryogenic FBG Sensitivity Coefficient Calibration for High-Precision Thermal Expansion Measurements","authors":"Taolue Yang, Shi Liu, Yi Yang, Xinran Guo, Tao Tao","doi":"10.1007/s10909-023-02980-4","DOIUrl":"10.1007/s10909-023-02980-4","url":null,"abstract":"<div><p>Under conventional temperature regimes, optical fiber sensors (OFS) have been extensively utilized for real-time monitoring of strain and temperature responses in transportation, energy, and civil engineering structures. However, in low-temperature environments, OFS applications confront challenges such as poor adhesion, diminished sensitivity, weak signal transmission, and complex compensation requirements. Therefore, it is crucial to conduct in-depth research on the high-precision calibration characteristics of strain and temperature in cryogenic conditions. In this study, we propose an enhanced calibration technique for fiber Bragg grating (FBG) strain/temperature sensitivity, covering a low-temperature range of 77–296 K. Employing a custom-designed low-temperature testing apparatus, we calibrated the thermo-optic coefficients, temperature, and strain sensitivity coefficients. Subsequently, this improved method was applied to measure the coefficient of thermal expansion of various materials. The results confirm the accuracy of the proposed method and present the strain/temperature measurement properties of FBG. This research provides guidance for the precise use of FBG in low-temperature environments.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"213 1-2","pages":"107 - 120"},"PeriodicalIF":2.0,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5346582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scattering- and Binding Properties of Two 133Cs Atoms in Free Space and in an Ultracold, Low-Dense 133Cs Vapor 两个133Cs原子在自由空间和超冷低密度133Cs蒸气中的散射和结合特性

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-07-21 DOI: 10.1007/s10909-023-02987-x

Humam B. Ghassib, Ahmad M. Alkurdi, Ayman S. Sandouqa

{"title":"Scattering- and Binding Properties of Two 133Cs Atoms in Free Space and in an Ultracold, Low-Dense 133Cs Vapor","authors":"Humam B. Ghassib, Ahmad M. Alkurdi, Ayman S. Sandouqa","doi":"10.1007/s10909-023-02987-x","DOIUrl":"10.1007/s10909-023-02987-x","url":null,"abstract":"<div><p>The scattering- and bound-state properties of two <sup>133</sup>Cs atoms, in free space as well as in low-dense Cs vapor, are calculated for both electronic singlet and triplet states. In free space, standard scattering theory is used; specifically, the Lippmann–Schwinger t-matrix equation is solved by a matrix-inversion technique. The output is the phase shifts, from which the corresponding (total, viscosity, [complex] spin-exchange, and average) cross sections are computed. In the vapor, a generalized scattering theory is invoked, the key equation being the Galitskii–Migdal–Feynman T-matrix equation. This is solved by the same technique to obtain the cross sections in the <i>medium</i>. Likewise, the t- and T-matrix equations are solved for negative definite energy eigenvalues—again, by matrix inversion, albeit after symmetrizing the kernel in the integral equation involved—to determine the respective binding energies of the Cs<sub>2</sub> dimer in free space and in the vapor. Sharp resonance peaks, representing ‘quasi’ bound states, appear in the cross sections. In the triplet total and viscosity cross sections, quantum effects appear as undulations. The results obtained for the complex spin-exchange cross sections are particularly highlighted, because of their importance in the spectroscopy of the <sup>133</sup>Cs<sub>2</sub> dimer. So are the results for the binding energy of this dimer, which are important in the physics of ultracold molecules. In calculating this quantity, as many relative partial waves as necessary (<i>ℓ</i> = 0–7 and 0–8 in free space and the medium, respectively) are taken into account to guarantee ‘convergence’. The role of the medium is given special attention throughout. Most of the quantities considered here are calculated for the first time; but whenever available, comparison is made with previous results.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"213 1-2","pages":"1 - 27"},"PeriodicalIF":2.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-023-02987-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4825291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Entanglement Generated in Quantum Dot-Cavity Coupled System Mediated by Plasmonic Waveguide 等离子波导介导量子点腔耦合系统的纠缠

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-07-21 DOI: 10.1007/s10909-023-02982-2

Ju-Song Ryom, Gang-Yong Ri, Nam-Chol Kim, Myong-Chol Ko, Il-Hyang Choe, Su-Ryon Ri

引用次数: 0

4He Gas in the Temperature-Range 1 mK–5 K: Thermodynamic Properties from the Quantum Second Virial Coefficient 温度范围为1 mK-5 K的氦气体:量子第二维里系数的热力学性质

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-07-17 DOI: 10.1007/s10909-023-02986-y

B. R. Joudeh, A. S. Sandouqa, O. T. Al-Obeidat, A. F. Al-Maaitah, H. B. Ghassib

{"title":"4He Gas in the Temperature-Range 1 mK–5 K: Thermodynamic Properties from the Quantum Second Virial Coefficient","authors":"B. R. Joudeh, A. S. Sandouqa, O. T. Al-Obeidat, A. F. Al-Maaitah, H. B. Ghassib","doi":"10.1007/s10909-023-02986-y","DOIUrl":"10.1007/s10909-023-02986-y","url":null,"abstract":"<div><p>The quantum second virial coefficient B<sub>q</sub> of low-dense <sup>4</sup>He gas is calculated over the temperature range 1 mK–5 K. This is the first step in determining, according to standard expressions, the thermodynamic properties of the system, namely, the virial equation of state, compressibility factor, total internal energy, specific heat capacity, and entropy. These are compared to previous results wherever available. A large negative B<sub>q</sub> is obtained. It is argued that this is intimately related to the formation of small clusters. Based on the semi-quantitative analysis, the cluster formation is predicted to occur in the present system at a fairly low temperature ~ 0.049 to 2.254 K. It is found that: (1) as the temperature decreases, the second virial coefficient deviates more and more from the classical behavior, thanks to quantum effects; and (2) from the pressure (P)-temperature (T) behavior, it is deduced that P is negative in the T-range 0.04 K < T < 0.17 K. In the negative-P regime, the system becomes unstable.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"213 1-2","pages":"28 - 41"},"PeriodicalIF":2.0,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4681106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unconventional Temperature-Dependent Critical Current in the Fe-Based Hybrid Josephson Junction with a Metallic Barrier 具有金属势垒的铁基杂化约瑟夫森结中的非常规温度依赖临界电流

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-07-10 DOI: 10.1007/s10909-023-02984-0

Huili Zhang, Duo Zhang, Weihua Shao, Wanghao Tian

引用次数: 0

Vibrating Microwire Resonators Used as Local Probes of Quantum Turbulence in Superfluid (^{4})He 振动微丝谐振器作为超流体中量子湍流的局部探针(^{4}) He

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-07-04 DOI: 10.1007/s10909-023-02983-1

Šimon Midlik, Maximilián Goleňa, Marek Talíř, David Schmoranzer

{"title":"Vibrating Microwire Resonators Used as Local Probes of Quantum Turbulence in Superfluid (^{4})He","authors":"Šimon Midlik, Maximilián Goleňa, Marek Talíř, David Schmoranzer","doi":"10.1007/s10909-023-02983-1","DOIUrl":"10.1007/s10909-023-02983-1","url":null,"abstract":"<div><p>We report the use of a 60 <span>(upmu)</span>m thick superconducting NbTi vibrating wire resonator as a local probe of quantum turbulence in superfluid <span>(^{4})</span>He (He II). Wire resonance is driven via magneto-motive force, exclusively in the laminar hydrodynamic regime. For the detection of quantized vortices, changes in the probe resonant frequency and peak amplitude are measured in reaction to the applied external counterflow. Calibration of the device response is obtained in thermal counterflow in the temperature range from 1.45 to 2.1 K against second sound attenuation data. The main motivation of this work is the development of local probes of quantum turbulence suitable for use in non-homogeneous systems such as flows with spherical or cylindrical symmetry. The frequency response of the devices is described with good accuracy at lower temperatures by considering the balance between viscosity and mutual friction and its effect on the boundary layer. Under the experimental conditions, the fluid–structure interaction cannot be modeled reliably by an effective turbulent viscosity and agrees better with a model of the boundary layer modified by mutual friction. The obtained results may be extended to the interaction of nanoscale devices with sufficiently dense vortex tangles.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":"212 5-6","pages":"168 - 184"},"PeriodicalIF":2.0,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4165704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Boundary Effect and Critical Temperature of Two-Band Superconducting Films: Application to MgB(_2) 双带超导薄膜的边界效应和临界温度:在MgB中的应用(_2)

IF 2 3区物理与天体物理

Journal of Low Temperature Physics Pub Date : 2023-06-20 DOI: 10.1007/s10909-023-02981-3

Jia-Hui Chen, Jian-Tao Che, Chen-Xiao Ye, Hai Huang

引用次数: 0