Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

5.6K
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...
5.6K
Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

6.0K
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.
6.0K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

6.2K
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.
6.2K
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

1.2K
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
1.2K
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

1.1K
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
1.1K
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

5.7K
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...
5.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Effects of complexation temperature on the helical structure and properties of amylose-α-linolenic acid complexes.

Food chemistry·2026
Same author

Effects of Calcium-Regulating Pulsed Electromagnetic Fields Plus Respiratory Muscle Training on Poststroke Respiratory Dysfunction: A Randomized, Double-Blind, Sham-Controlled Pilot Trial.

Stroke·2026
Same author

Moving MRI: Imaging a moving body with a moving magnet.

ArXiv·2026
Same author

[Application of palmar incision and levering technique in the surgical treatment of distal radius fractures in elderly].

Zhongguo gu shang = China journal of orthopaedics and traumatology·2026
Same author

A calculation approach for the virtual source spatial distribution of sub-beams in single-emitter multi-electron-beam systems.

Ultramicroscopy·2026
Same author

A global multidimensional analysis of the chimeric antigen receptor T-cell therapy clinical trial landscape and development trends.

Biomarker research·2026
Same journal

Development of Silicon Micromachined Waveguide Filter-Banks for On-Chip Spectrometers.

IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee·2026
Same journal

Cooldown and Ramp Test of a Low-Cryogen, Lightweight, Head-Only 7T MRI Magnet.

IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee·2026
Same journal

Design and Construction Progress of a Cryogen-Free, Shielded 23.5-T REBCO Magnet for Benchtop 1-GHz NMR Spectroscopy.

IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee·2025
Same journal

Anomalous Supercurrent Modulation in Josephson Junctions With Ni-Based Barriers.

IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee·2025
Same journal

1 GHz Waveform Synthesis With Josephson Junction Arrays.

IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee·2024
Same journal

Single-Flux-Quantum Multiplier Circuits for Synthesizing Gigahertz Waveforms With Quantum-Based Accuracy.

IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee·2024
See all related articles

Related Experiment Video

Updated: Jan 12, 2026

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.8K

Low-AC-Loss Nb3Sn Validation Model Coil in Solid Nitrogen for a Fast-Switching-Field MRI Magnet Prototype.

Jintao Hu1, Junseong Kim2, Liangjun Shao1

  • 1Francis Bitter Magnet Laboratory (FBML)/Plasma Science and Fusion Center (PSFC), Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.

IEEE Transactions on Applied Superconductivity : a Publication of the IEEE Superconductivity Committee
|November 3, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel superconducting magnet for magnetic resonance imaging (MRI) that rapidly switches magnetic fields. This technology enables new imaging techniques and differential relaxometry by quickly changing between high and low fields.

Keywords:
Fast-switching fieldHigh-conductive thermal linksLow-AC-loss Nb3Sn coilMRISolid nitrogen

More Related Videos

High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions
08:42

High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions

Published on: October 10, 2014

11.9K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.8K

Related Experiment Videos

Last Updated: Jan 12, 2026

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.8K
High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions
08:42

High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions

Published on: October 10, 2014

11.9K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.8K

Area of Science:

  • Superconducting magnet technology
  • Magnetic Resonance Imaging (MRI) applications
  • Advanced materials science

Background:

  • Conventional MRI magnets utilize static magnetic fields.
  • Rapidly switching magnetic fields in MRI offer potential for novel contrast mechanisms.
  • Developing technologies for fast-field-switching superconducting magnets is crucial for next-generation MRI.

Purpose of the Study:

  • To design and test a low-AC-loss Niobium-tin (Nb3Sn) model coil for a fast-switching-field MRI magnet.
  • To validate enabling technologies for a magnet capable of switching between 3 T and 0.5 T within 1 second.
  • To explore new contrast mechanisms like level-crossing and adiabatic demagnetization/remagnetization.

Main Methods:

  • Development of a low-AC-loss Nb3Sn coil.
  • Implementation of a novel cooling technology using heat-conductive thermal links to solid nitrogen.
  • Anchoring thermal links to a cryocooler cold head for efficient heat transfer.
  • Testing the model coil to analyze temperature rise during rapid field switching.

Main Results:

  • Successful design and testing of the Nb3Sn model coil.
  • Demonstration of a magnet design enabling rapid switching between high (3 T) and low (0.5 T) fields.
  • Validation of a cooling system that prevents quench during fast field changes.
  • Analysis of maximum temperature rise in the coil.

Conclusions:

  • The developed low-AC-loss Nb3Sn coil and cooling system are key enabling technologies for fast-switching-field MRI magnets.
  • This technology facilitates novel MRI contrast mechanisms and differential relaxometry.
  • The design allows for rapid magnetic field changes without compromising superconducting stability.