Magnet technology and conductor design with high temperature superconductors
β Scribed by G. Ries
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 585 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0011-2275
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β¦ Synopsis
The implications of high temperature superconductors for the design of magnets and conductors are explored. Presuming that a sufficient current density is attained in the superconductor, rules are given to obtain the amount of normal conductor and structural material, which are both essential components in a conductor for use in a magnet system. It is shown that the empirical relation .2
023
A 2 -4 JeffEo ~ 1 J m , linking effective current density Jeff and stored energy E o, naturally emerges from the requirements of sufficient mechanical strength as well as safe energy extraction in the case of a quench. In the superconductor a Jc of 105 A cm-2 is sufficient for most purposes. As an alternative to cooling to 77 K in liquid nitrogen we also consider operation at 27 K in liquid neon.
π SIMILAR VOLUMES
The field and temperature dependent critical current density, jc(B, T), and magnetization, M(B, T), of melt processed Bi2Sr2CaCu208 samples have been examined in fields up to 8 T. In addition, published data on an epitaxially grown YBa2Cu307 film have been analysed. Both sources of information show
An extended critical state model which includes the effects of bulk critical current density, equilibrium magnetization and surface barrier is developed for the magnetization of superconductors. The equilibrium magnetization and surface barrier are modelled by an applied field dependent surface supe
Normal zone propagation is investigated above the maximum equilibrium current I\*, where a superconductor has no stable state in the normal region. This monostable thermal wave is shown to have constant front velocity although its crest grows infinitely with time. Various monostable regimes are anal