التفاصيل البيبلوغرافية
| العنوان: |
The design of a very high-Q superconductor electromechanical clock |
| المؤلفون: |
Schilling, Osvaldo F. |
| المصدر: |
Brazilian Journal of Physics. June 2007 37(2a) |
| بيانات النشر: |
Sociedade Brasileira de Física, 2007. |
| سنة النشر: |
2007 |
| مصطلحات موضوعية: |
Superconductor devices, Type-II superconductivity, Energy storage systems |
| الوصف: |
We discuss the properties of an electromechanical oscillator whose operation is based upon the cyclic, quasi-conservative conversion between gravitational potential, kinetic, and magnetic energies. The system consists of a strong-pinning type-II superconductor square loop subjected to a constant external force and to magnetic fields. The loop oscillates in the upright position at a frequency that can be tuned in the range 10-1000 Hz, and has induced in it a rectified electrical current. The emphasis of this paper is on the evaluation of the major remaining sources of losses in the oscillations. We argue that such losses should be associated with the viscous vibration of pinned flux lines in the superconductor Nb-Ti wire, provided the oscillator is kept under vacuum and the magnetic field is sufficiently uniform. Losses of similar or greater magnitude would be associated with dragging of the loop against the He atmosphere remaining in the evacuated cryostat. We discuss how other different sources of loss would become negligible for such operational conditions, so that a very high quality factor Q exceeding 10(10) might in principle be reached by the oscillator. The prospective utilization of such oscillator as a low-frequency high-Q clock is analyzed. |
| نوع الوثيقة: |
article |
| وصف الملف: |
text/html |
| اللغة: |
English |
| تدمد: |
0103-9733 |
| DOI: |
10.1590/S0103-97332007000300013 |
| URL الوصول: |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332007000300013 |
| Rights: |
info:eu-repo/semantics/openAccess |
| رقم الانضمام: |
edssci.S0103.97332007000300013 |
| قاعدة البيانات: |
SciELO |
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