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

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
Gyroscope01:02

Gyroscope

3.9K
A gyroscope is defined as a spinning disk in which the axis of rotation is free to assume any orientation. When spinning, the orientation of the spin axis is unaffected by the orientation of the body that encloses it. The body or vehicle enclosing the gyroscope can be moved from place to place, while the orientation of the spin axis remains the same. This makes gyroscopes very useful in navigation, especially where magnetic compasses cannot be used, such as in crewed and crewless spacecraft,...
3.9K
Gyroscope: Precession01:24

Gyroscope: Precession

5.1K
Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
5.1K
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

2.5K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
2.5K
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

989
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
989
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

You might also read

Related Articles

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

Sort by
Same author

Tripled Readout Slices in Multi Time-Point pCASL Using Multiband Look-Locker EPI.

PloS one·2015
Same author

Four Methods for Calculating Blood-loss after Total Knee Arthroplasty.

Chinese medical journal·2015
Same author

Vegetation Greening and Climate Change Promote Multidecadal Rises of Global Land Evapotranspiration.

Scientific reports·2015
Same author

The effects of RNA interference mediated VEGF gene silencing on biological behavior of renal cell carcinoma and transplanted renal tumor in nude mice.

Cancer biomarkers : section A of Disease markers·2015
Same author

A Standardized DNA Variant Scoring System for Pathogenicity Assessments in Mendelian Disorders.

Human mutation·2015
Same author

[TOTAL KNEE ARTHROPLASTY IN YOUNG PATIENTS WITH OSTEOARTHRITIS].

Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery·2015

Related Experiment Video

Updated: Dec 28, 2025

Hyperpolarized Xenon for NMR and MRI Applications
16:20

Hyperpolarized Xenon for NMR and MRI Applications

Published on: September 6, 2012

20.0K

Closed-Loop Nuclear Magnetic Resonance Gyroscope Based on Rb-Xe.

Ke Zhang1, Nan Zhao2, Yan-Hua Wang3,4,5

  • 1Beijing Computational Science Research Center, Beijing, 100193, China.

Scientific Reports
|February 12, 2020
PubMed
Summary

This study presents a closed-loop nuclear magnetic resonance gyroscope (NMRG) system. Experimental results validate the theoretical model, showing promise for enhanced NMRG performance.

More Related Videos

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

13.1K
Dual DNA Rulers to Study the Mechanism of Ribosome Translocation with Single-Nucleotide Resolution
10:27

Dual DNA Rulers to Study the Mechanism of Ribosome Translocation with Single-Nucleotide Resolution

Published on: July 8, 2019

6.6K

Related Experiment Videos

Last Updated: Dec 28, 2025

Hyperpolarized Xenon for NMR and MRI Applications
16:20

Hyperpolarized Xenon for NMR and MRI Applications

Published on: September 6, 2012

20.0K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

13.1K
Dual DNA Rulers to Study the Mechanism of Ribosome Translocation with Single-Nucleotide Resolution
10:27

Dual DNA Rulers to Study the Mechanism of Ribosome Translocation with Single-Nucleotide Resolution

Published on: July 8, 2019

6.6K

Area of Science:

  • Physics
  • Engineering
  • Quantum Sensing

Background:

  • Nuclear magnetic resonance gyroscopes (NMRGs) offer high precision, small size, and low power consumption.
  • Developing advanced NMRG systems is crucial for next-generation inertial navigation.

Purpose of the Study:

  • To present a closed-loop NMRG system utilizing spin-exchange optical pumping of Rb-Xe.
  • To establish a theoretical model and analyze the system's performance characteristics.

Main Methods:

  • Developed a theoretical model for the closed-loop NMRG system.
  • Calculated step and frequency responses using the derived transfer function.
  • Experimentally investigated the impact of closed-loop parameters on NMRG performance.

Main Results:

  • The theoretical model accurately predicted the system's step and frequency responses.
  • Experimental data aligned well with theoretical calculations.
  • Identified key closed-loop parameters influencing NMRG sensitivity and dynamic response.

Conclusions:

  • The closed-loop NMRG system demonstrates good agreement between theoretical predictions and experimental outcomes.
  • This work provides a foundation for future improvements in NMRG precision and reliability.