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Related Concept Videos

Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
Magnetic Field Due To A Thin Straight Wire01:27

Magnetic Field Due To A Thin Straight Wire

Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
Thin-Walled Hollow Shafts01:15

Thin-Walled Hollow Shafts

In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution of...
Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
Torsion of Noncircular Members01:16

Torsion of Noncircular Members

Circular shafts undergoing torsional stress maintain their cross-sectional integrity due to their axisymmetric nature. This symmetry ensures an even distribution of stress, allowing the shaft to withstand torsion without distorting. In contrast, square bars, lacking this axial symmetry, experience significant distortion across their cross-sections when subjected to torsion, with the exception of along their diagonals and at lines connecting midpoints. A detailed examination of a cubic element...

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Related Experiment Video

Updated: Jun 27, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

A torquing shearing interferometer for cylindrical wire array experiments.

S A Pikuz1, P C Schrafel, T A Shelkovenko

  • 1Cornell University, 439 Rhodes Hall, Ithaca, New York 14853, USA. sap17@cornell.edu

The Review of Scientific Instruments
|December 3, 2008
PubMed
Summary

A novel torquing shearing interferometer enables electron density profiling of imploding wire arrays. This method overcomes limitations of standard interferometry for early-time, end-on diagnostics, providing crucial data for plasma physics research.

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Implementation of a Reference Interferometer for Nanodetection
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Related Experiment Videos

Last Updated: Jun 27, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
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Published on: May 19, 2014

Force System with Vertical V-Bends: A 3D In Vitro Assessment of Elastic and Rigid Rectangular Archwires
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Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Area of Science:

  • Plasma Physics
  • Interferometry
  • Diagnostic Techniques

Background:

  • Standard shearing interferometry relies on linear beam shifts to map density profiles.
  • This technique requires the probing beam to exceed the perturbing medium's size.
  • Early-time wire array implosions present challenges due to limited beam diameter and complex density distributions.

Purpose of the Study:

  • To develop and implement an alternative shearing interferometry method for diagnosing early-time wire array implosions.
  • To overcome the limitations of linear translation in end-on viewing configurations.
  • To obtain time-resolved radial and azimuthal electron density profiles.

Main Methods:

  • A torquing shearing interferometer was designed and implemented on the COBRA experiment.
  • Azimuthal rotation of one beam relative to the other was used to achieve beam overlap.
  • The interferometer was used for end-on diagnostics of imploding cylindrical wire arrays.

Main Results:

  • The torquing shearing interferometer successfully generated interference fringe patterns.
  • Time-resolved radial and azimuthal electron density profiles were obtained.
  • The method provided insights into the early stages of cylindrical wire array implosions.

Conclusions:

  • Azimuthal rotation is a viable alternative to linear translation for shearing interferometry in confined geometries.
  • The developed interferometer is effective for diagnosing complex plasma structures in wire array implosions.
  • This technique offers a valuable tool for advancing the understanding of high-energy-density plasmas.