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Showing 1 to 20 of 177 for “"electromagnetic fields"”.
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Thermographic imaging of electromagnetic fields.
It is recognized that a means of converting electromagnetic fields into visible images would greatly simplify the problem of designing structures to optimize their compatibility with such fields. Two needs must be met to allow such visualization. First, the fields must be transduced into a …
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Alkali Rydberg States in Electromagnetic Fields
We study highly excited hydrogen and alkali atoms (’Rydberg states’) under the influence of a strong microwave field. As the external frequency is comparable to the highly excited electron’s classical Kepler frequency, the external field induces a strong coupling of many different quantum …
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Continuum structure in strong electromagnetic fields
[Pages missing ] In this chapter, the Dirac equation for spherically symmetric potentials is closely examined. Analytical solutions are found for a square well potential, the properties of which will be used later when the equation is solved for arbitrary potentials using numerical methods. The …
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Ultracold Molecules: The Effect of Electromagnetic Fields
… in the properties of ultracold molecules. Electromagnetic fields can be used to create, trap, and modify the collisional dynamics of ultracold molecules, and thus the properties of ultracold molecules in electromagnetic fields is of growing importance. This thesis examines some of the …
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Electromagnetic fields in relation to eddy current gauging
… aspects of the relationships between electromagnetic fields and a non-contact type of eddy current gauge, which utilises a cylindrical solenoid and coaxially positioned metallic bar, either ferrous or non-ferrous.A rigorous mathematical analysis of the eddy current gauging system is …
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Electromagnetic fields due to a thin resistive layer
Includes bibliographical references (pages 139-140).
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Electromagnetic fields in relation to eddy current gauging
… aspects of the relationships between electromagnetic fields and a non-contact type of eddy current gauge, which utilises a cylindrical solenoid and coaxially positioned metallic bar, either ferrous or non-ferrous. A rigorous mathematical analysis of the eddy current gauging system is …
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Chaotic behaviour of charged particles in electromagnetic fields
… chaoticity of magnetic field lines of tokamak fields, as charged particles move along field lines. In particular, the symmetric tokamap was studied to determine the physical quantities that influence the system’s chaotic behaviour. We implement several chaos detection techniques: the …
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Rayleigh-Taylor-Induced electromagnetic fields in laser-produced plasmas
Spontaneous electromagnetic fields can be important to the dynamic evolution of a plasma by directing heat flow as well as providing additional pressures on the conducting fluids through the Lorentz force. Electromagnetic fields are predicted to affect fluid behavior during the core-collapse of …
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Theory of Electronic Response to Electromagnetic Fields in Crystalline Solids
… of macroscopic polarization and magnetization fields, and free charge and current densities, provides physical insight into the distribution and the dynamics of the charges that constitute a material medium. Here we consider a semi-classical theory of such interactions in crystalline materials …
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Coherence Effects and Spin Polarisation of Electrons in Electromagnetic Fields
The collision of relativistic electrons with a counter propagating laser pulse can potentially generate short pulses of harmonics in the X-ray range, capable of tracking molecular, atomic and sub-atomic dynamics. Also, the creation of relativistic spin polarised electron beams is essential for …
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The Diffraction Transformation of Electromagnetic Fields Between Two Parallel Planes
Made available in DSpace on 2014-12-08T22:24:40Z (GMT). No. of bitstreams: 1 7000956.pdf: 3518829 bytes, checksum: 546613e260fdaecd0f99f62187c2034b (MD5) Previous issue date: 1969
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The Effectiveness of Pulsed Electromagnetic Fields Therapy for Treatment of Chronic Pain
" Pulsed electromagnetic fields (PEMF)는 1979년 부정유합과 관련된 골절치유에 대해 미국 식품의약국의 승인이후 널리 이용되고 있으며, 여러 연구자들에 의해 요통, 경부통, 견관절 질환, 슬관절염, 대상포진후 신경통, 다발성 경화증, 신경병증성 통증 등에도 적용되고 있다. 이에 저자는 만성 통증환자에서 PEMF 치료의 유용성을 확인하고자 평균 연령 55.2세의 요통, 대상포진후 신경통, 경부통, 복합부위 통증 증후군 등의 만성 통증환자 40명을 대상으로 심부자극 전자기장 치료기 (CR-3000, 씨알 …
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Measurement And Characterization Of Microwave Transient Electromagnetic Fields Generated From Laser/matter Interaction
… result in the emission of short, transient electromagnetic pulses. Previous investigations into laser generated electromagnetic pulses provide basic information regarding frequencies where such pulses may be present, along with the time duration of the pulses. Such investigations have also …
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Investigation of the interaction of high current relativistic electron beams with electromagnetic fields
The results obtained in the investigation of high current relativistic electron beams produced by explosive electron eMission from the flare cathode plasma of a high voltage, cold-cathode, field-emission diode are reported. In addition, the production of high power ( ~100kW) microwave radiation …
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A Finite Element Approach to Model Electromagnetic Fields Scattered by a Buried Cavity
… of the solution for the electric and magnetic fields at the cavity aperture, the strength of the return echo can then be calculated and displayed in a radar cross section. In addition, numerical verifications and experiments illustrating the efficacy of the approach will be provided by …
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Effects of Electromagnetic Fields on the Visually Evoked Response in the Visual Cortex
<p>Problem. This study sought to determine if electromagnetic fields affect the visually evoked response of the visual cortex. From the fact that nerve impulses are propagated by the motions of electrically charged ions, the question arose whether the presence of an external electromagnetic field …
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