Composite-coil electrodynamic instruments
نویسندگان
چکیده
منابع مشابه
Electrodynamic constraints on homogeneity and RF power deposition in multiple coil excitations
Introduction Correction of B1 inhomogeneities and management of SAR are among the most difficult challenges faced by in-vivo ultra high field MR applications. The use of multiple independently driven transmit elements, which enables fine control over the distribution of electromagnetic fields, has been explored as a possible solution and various approaches have been developed. In parallel trans...
متن کاملElectrodynamic Metanuclei
A relativistic system of electrically charged fermions and oppositely charged massive scalars with no self-interactions, is argued to have a long-lived collective state with a net charge. The charge is residing near the surface of the spherically-symmetric state, while the interior consists of the condensed scalars, that are neutralized by the fermions. The metastability is achieved by competit...
متن کاملA 3 T sodium and proton composite array breast coil.
PURPOSE The objective of this study was to determine whether a sodium phased array would improve sodium breast MRI at 3 T. The secondary objective was to create acceptable proton images with the sodium phased array in place. METHODS A novel composite array for combined proton/sodium 3 T breast MRI is compared with a coil with a single proton and sodium channel. The composite array consists of...
متن کاملStructure-property Relationships of Composite Coil Springs Processed by Rtm
Textile technology and resin transfer molding (RTM) process have been combined to manufacture composites coil springs. Preforms for coil springs were made by braiding process, in which axial yarns are located in the central region and braiding yarns covered them circumferentially. The geometric and process parameters that are related with the fiber orientation and fiber volume fraction of the b...
متن کاملDeorbiting Dynamics of Electrodynamic Tether
This paper studies satellite deorbit using electrodynamic tether (EDT) propulsion. Gaussian perturbation equations are used to model the orbital dynamics of EDT with environmental perturbations of electrodynamic force, aerodynamic drag and the effect of Earth’s oblateness. Differential equations for the induced voltage-current across EDT are derived and solved with boundary conditions determine...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Bureau of Standards Journal of Research
سال: 1932
ISSN: 0091-1801
DOI: 10.6028/jres.008.018