Experimental Techniques for Low-Temperature Measurements: Cryostat Design, Material Properties and Superconductor Critical-Current TestingThis book presents a highly integrated, step-by-step approach to the design and construction of low-temperature measurement apparatus. It is effectively two books in one: A textbook on cryostat design techniques and an appendix data handbook that provides materials-property data for carrying out that design. The main text encompasses a wide range of information, written for specialists, without leaving beginning students behind. After summarizing cooling methods, Part I provides core information in an accessible style on techniques for cryostat design and fabrication - including heat-transfer design, selection of materials, construction, wiring, and thermometry, accompanied by many graphs, data, and clear examples. Part II gives a practical user's perspective of sample mounting techniques and contact technology. Part III applies the information from Parts I and II to the measurement and analysis of superconductor critical currents, including in-depth measurement techniques and the latest developments in data analysis and scaling theory. The appendix is a ready reference handbook for cryostat design, encompassing seventy tables compiled from the contributions of experts and over fifty years of literature. |
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Table des matières
| 1 | |
| 3 | |
| 6 | |
| 14 | |
| 18 | |
| 30 | |
| 37 | |
| 45 | |
reference compendium of cryogenicthermometer properties and application techniques | 214 |
56 References | 223 |
Properties of Solids at Low Temperatures | 226 |
61 Specific heat and thermal diffusivity | 227 |
62 Thermal expansioncontraction | 233 |
63 Electrical resistivity | 240 |
64 Thermal conductivity | 248 |
65 Magnetic susceptibility | 252 |
| 49 | |
| 50 | |
| 52 | |
| 55 | |
| 59 | |
| 62 | |
| 67 | |
| 69 | |
| 72 | |
| 82 | |
| 87 | |
| 88 | |
| 98 | |
34 Construction example for a basic dipper probe | 109 |
35 Sizing of parts for mechanical strength | 113 |
36 Mechanical motion at cryogenic temperature | 120 |
37 Vacuum techniques and seals for cryogenic use | 122 |
high and ultrahigh vacuum techniques | 131 |
39 References | 146 |
Wiring and Connections | 150 |
42 Wire selection | 154 |
43 Insulation selection | 157 |
45 Solder connections | 161 |
techniques for minimizing thermoelectric voltages | 163 |
47 Vacuum electrical leadthroughs | 166 |
48 Radiofrequency coaxial cables | 172 |
49 Highcurrent leads | 174 |
410 Flexible current leads | 181 |
411 References | 182 |
Temperature Measurement and Control | 185 |
51 Thermometer selection 1300 K | 186 |
52 Selection of thermometers for use in high magnetic fields | 198 |
53 Thermometer installation and measurement procedures | 202 |
54 Controlling temperature | 210 |
66 Mechanical properties | 255 |
67 References | 265 |
ELECTRICAL TRANSPORT MEASUREMENTS SAMPLE HOLDERS AND CONTACTS | 271 |
Sample Holders | 273 |
72 Fourlead and twolead electrical transport measurements | 274 |
73 Bulk sample holders | 276 |
74 Thinfilm sample holders | 301 |
75 Addenda | 312 |
76 References | 315 |
Sample Contacts | 317 |
82 Definition of specific contact resistivity and values for practical applications | 318 |
83 Contact techniques for highcurrent superconductors | 320 |
84 Contact techniques for film superconductors | 333 |
85 Example calculations of minimum contact area | 341 |
86 Spreadingresistance effect in thin contact pads and example calculations | 346 |
87 References | 349 |
SUPERCONDUCTOR CRITICALCURRENT MEASUREMENTS AND DATA ANALYSIS | 351 |
CriticalCurrent Measurements | 353 |
92 Instrumentation | 361 |
93 Measurement procedures | 366 |
94 Examples of criticalcurrent measurement cryostats | 377 |
95 References | 392 |
CriticalCurrent Data Analysis | 395 |
101 Practical criticalcurrent definitions | 396 |
102 Currenttransfer correction | 404 |
103 Magneticfield dependence of critical current | 408 |
104 Temperature dependence of critical current | 424 |
105 Straininduced changes in the critical current | 432 |
106 Transformation method for simplified application of scaling relations | 456 |
107 Unified strainandtemperature scaling law and transformations | 464 |
108 References | 485 |
Data handbook of material properties and cryostat design | 491 |
INDEX | 627 |
Autres éditions - Tout afficher
Experimental Techniques for Low-Temperature Measurements: Cryostat Design ... Jack Ekin Aucun aperçu disponible - 2006 |
Expressions et termes fréquents
alloys aluminum annealing apparatus Appendix applied calibration coefficient composite conductor connector constant contact pads contact resistivity cooling copper critical current cryocooler cryogenic cryogenic liquid cryogenic temperatures cryostat current leads current-transfer curve defined density determined dewar diameter diode effective Ekin electrical electrical resistivity electron epoxy error example filaments film find first fit fitting flow flux given heat conduction heater high-current high-field high-Tc superconductors illustrated indium insulation interface intrinsic strain joints Joule heating length liquid helium liquid nitrogen Lorentz force low temperatures magnetic field magnetic-field materials metals meter method multifilamentary Nb3Sn needed oxygen parameterization parameters phonon pogo pins pressure probe properties pump range room temperature sample holder scaling law sensors significant significantly solder specific heat stainless steel superconductors surface tabulated techniques thermal conductivity thermal contraction thermally anchored thermometer thickness thin-film transformation tube typically unified usually vacuum values vapor voltage wire YBCO yield strength

