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Related Concept Videos

Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
Magnetic Fields01:27

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
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.
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...

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Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
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Published on: June 9, 2016

A Linear Magnetic Field Scan Driver.

Richard W Quine1, Tomasz Czechowski, Gareth R Eaton

  • 1Department of Engineering, University of Denver, Denver, CO 80208.

Concepts in Magnetic Resonance. Part B, Magnetic Resonance Engineering
|October 20, 2009
PubMed
Summary
This summary is machine-generated.

A new linear magnetic field scan driver was developed for electron paramagnetic resonance (EPR) spectroscopy. This system offers rapid magnetic field scanning and precise waveform control for enhanced spectroscopic analysis.

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Last Updated: Jun 19, 2026

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Published on: September 26, 2016

Area of Science:

  • Physics
  • Spectroscopy
  • Electronics Engineering

Background:

  • Electron Paramagnetic Resonance (EPR) spectroscopy requires precise control over magnetic fields.
  • Rapid and synchronized magnetic field scanning is crucial for advanced EPR experiments.
  • Existing systems may lack the flexibility and precision needed for complex waveform generation.

Purpose of the Study:

  • To develop a versatile and high-performance linear magnetic field scan driver for EPR spectroscopy.
  • To enable rapid, digitally controlled magnetic field sweeps with synchronized data acquisition.
  • To offer a flexible platform capable of driving arbitrary current waveforms.

Main Methods:

  • Development of a digitally synthesized ramp waveform generator.
  • Integration of a power amplifier for driving magnetic field coils.
  • Implementation of a synchronized trigger signal for data collection digitizers.
  • Computer control via a serial data interface and user-friendly front panel operation.

Main Results:

  • Successfully developed a linear magnetic field scan driver with adjustable frequency (500-20,000 Hz) and amplitude (up to 80 Gpp).
  • Achieved 12-bit resolution for independent control of waveform frequency and amplitude.
  • Demonstrated capability to drive arbitrary current waveforms from external sources.
  • Ensured synchronization between the magnetic field ramp and data acquisition.

Conclusions:

  • The developed magnetic field scan driver significantly enhances capabilities for EPR spectroscopy.
  • Its precise control and rapid scanning features facilitate advanced experimental designs.
  • The system's versatility makes it suitable for a range of EPR applications and research.