Antisymmetric standing wave structure associated with the compressional Pc 5 pulsation of November 14, 1979

1986 ◽  
Vol 91 (A10) ◽  
pp. 11163 ◽  
Author(s):  
Kazue Takahashi ◽  
Paul R. Higbie
Keyword(s):  
Standing Wave ◽  
Wave Structure

scholarly journals The specifics of quasi-optical measurements in the submillimetre waveband

2021 ◽  
pp. 21-27
Author(s):  
G. V. Kozlov ◽  
S. P. Lebedev
Keyword(s):  
Electromagnetic Field ◽  
Optical Waveguide ◽  
Standing Wave ◽  
Wave Structure ◽  
Dielectric Measurement ◽  
Optical Measurements ◽  
Measurement Results

The paper investigates the influence of the electromagnetic field and standing wave structure in a quasi-optical waveguide on the dielectric measurement results and gives recommendations on the layout of measuring circuits.

scholarly journals Development of a novel approach for construction of high gradient braze-free S-band cavities

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mahdi Aghayan ◽  
S. Farhad Masoudi ◽  
Farshad Ghasemi ◽  
Walter Wuensch ◽  
Hamed Shaker
Keyword(s):  
High Temperature ◽  
Radio Frequency ◽  
Standing Wave ◽  
Wave Structure ◽  
Linear Accelerators ◽  
High Gradient ◽  
Novel Approach ◽  
Shrink Fit ◽  
Temperature Heating ◽  
High Temperature Heating

AbstractVacuum breakdown is one of the main limitations to the operating accelerating gradient in radio frequency linear accelerators. Recent studies of copper cavities have been shown that harder copper conditions more quickly and can reach higher accelerating gradients than soft copper cavities. Exploiting this advantage requires the development of assembly methods that do not involve the copper-softening high-temperature heating cycles that are used in for example bonding and brazing. A shrink-fit method, which was already implemented successfully in the operation the IPM linac, is proposed for the construction high-gradient test S-band standing wave structure operating at 2998.5 MHz. The three cells cavity is designed to have a maximum gradient in the middle cell that is twice that of the adjacent cells. Mechanical considerations relating to the shrink-fit construction method have been performed using Ansys. To validate the simulations and ensure the feasibility of construction by shrink-fit method, a sample cavity was constructed and cold tests was performed.

scholarly journals Status of X-band standing wave structure studies at SLAC

2004 ◽  
Author(s):  
V.A. Dolgashev ◽  
C. Adolphsen ◽  
D.L. Burke ◽  
G. Bowden ◽  
R.M. Jones ◽  
...  
Keyword(s):  
Standing Wave ◽  
Wave Structure ◽  
X Band

Eels Under Standing Wave Conditions

1982 ◽  
Vol 40 ◽  
pp. 492-495
Author(s):  
O.L. Krivanek ◽  
J. TaftØ
Keyword(s):  
Standing Wave ◽  
Wave Conditions ◽  
Set Up ◽  
A Site ◽  
Complex Crystal

It is well known that a standing electron wavefield can be set up in a crystal such that its intensity peaks at the atomic sites or between the sites or in the case of more complex crystal, at one or another type of a site. The effect is usually referred to as channelling but this term is not entirely appropriate; by analogy with the more established particle channelling, electrons would have to be described as channelling either through the channels or through the channel walls, depending on the diffraction conditions.

Voltage and Orientation Dependence of Characteristic X-Ray Production in Thin Crystals

1985 ◽  
Vol 43 ◽  
pp. 414-415
Author(s):  
G. Thomas ◽  
K. M. Krishnan ◽  
Y. Yokota ◽  
H. Hashimoto
Keyword(s):  
Standing Wave ◽  
Incident Beam ◽  
Orientation Dependence ◽  
Incident Plane Wave ◽  
Crystalline Materials ◽  
X Ray ◽  
Incident Plane ◽  
Crystal Unit Cell ◽  
Beam Orientation ◽  
Acceleration Voltage

For crystalline materials, an incident plane wave of electrons under conditions of strong dynamical scattering sets up a standing wave within the crystal. The intensity modulations of this standing wave within the crystal unit cell are a function of the incident beam orientation and the acceleration voltage. As the scattering events (such as inner shell excitations) that lead to characteristic x-ray production are highly localized, the x-ray intensities in turn, are strongly determined by the orientation and the acceleration voltage. For a given acceleration voltage or wavelength of the incident wave, it has been shown that this orientation dependence of the characteristic x-ray emission, termed the “Borrmann effect”, can also be used as a probe for determining specific site occupations of elemental additions in single crystals.

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