Coil of the serpent; a novel.

Sequel: Valley of eagles.

Concepts and approaches for minimizing excessive exposure to electromagnetic radiation from RF sealers /

Mode of access: Internet.

Effects of stray magnetic fields and RF coupler asymmetry in the two-mile accelerator with sector focusing /

"AEC Contract AT(04-3)-400."

Scientific report : RF Project 464 /

1. The determination and interpretation of electronic collision cross sections -- 2. An electron spectrometer for the study of inelastic collision cross sections -- 3. The inelastic scattering of electrons by helium -- 4. Inelastic collision cross sections of carbon monoxide -- 5. An electron impact study of nitrogen in the kinetic energy range 400 to 600 volts -- 6. Electronic collision cross sections and oscillator strengths for oxygen in the Schumann-Runge region -- 7. Electronic collision cross sections for oxygen at excitation energies above 10 volts -- 8. Electronic collsion cross sections for nitrogen at excitation energies from 10 to 80 electron volts -- 9. Additional collision cross sections for helium, especially in the ionized continuum -- 10. A collision cross section study of CO₂, with a theoretical study of two transitions -- 11. Further developments in the theory and use of the electron spectrometer -- 12. Electronic collision cross sections of water vapor.

A standard for RF modulation factor /

Report No. FAA-RD-79-94." Microfiche.

Rempe engineering data book, prepared for the engineer and draftsman as a guide in the design of pipe coils and fin coils, with specific data on the subjects of dimensional limitations, coil development formula and heat transfer factors.

Mode of access: Internet.

Nuclear magnetic resonance saturation at intermediate values of H, the RF magnetic field.

"Contract N-onr-401-15."

How to make a medical coil.

Mode of access: Internet.

L.F. Rääf af Småland och hans literära umgängeskrets : bilder från flydda dagar /

Mode of access: Internet.

Analysis of rules and regulations for steel coil truck transport /

Cover title.

Operator's manual : meter, RF millivolt ME-526A/USM (NSN 6625-01-161-1461).

"28 May 1985."

Cable assembly CX-1065/G, telephone cable assemblies CX-1606/G and CX-1512/U, and telephone loading coil assembly CU-260/G.

Includes index.

RF signal generator AN/URM-25F.

Includes index.

Terminal box TA-125/GT, telephone repeating coil assembly TA-145/GT, maintenance kit MX-842/GT, and switchboard signal TA-123/GT. TA-123/GT.

"June 1952."

An FDTD model for calculation of gradient-induced eddy currents in MRI system

In most magnetic resonance imaging (MRI) systems, pulsed magnetic gradient fields induce eddy currents in the conducting structures of the superconducting magnet. The eddy currents induced in structures within the cryostat are particularly problematic as they are characterized by long time constants by virtue of the low resistivity of the conductors. This paper presents a three-dimensional (3-D) finite-difference time-domain (FDTD) scheme in cylindrical coordinates for eddy-current calculation in conductors. This model is intended to be part of a complete FDTD model of an MRI system including all RF and low-frequency field generating units and electrical models of the patient. The singularity apparent in the governing equations is removed by using a series expansion method and the conductor-air boundary condition is handled using a variant of the surface impedance concept. The numerical difficulty due to the asymmetry of Maxwell equations for low-frequency eddy-current problems is circumvented by taking advantage of the known penetration behavior of the eddy-current fields. A perfectly matched layer absorbing boundary condition in 3-D cylindrical coordinates is also incorporated. The numerical method has been verified against analytical solutions for simple cases. Finally, the algorithm is illustrated by modeling a pulsed field gradient coil system within an MRI magnet system. The results demonstrate that the proposed FDTD scheme can be used to calculate large-scale eddy-current problems in materials with high conductivity at low frequencies.