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

Design Example: Automobile Ignition System01:14

Design Example: Automobile Ignition System

The automobile's ignition system plays a vital role by ensuring the timely ignition of the fuel-air mixture in each cylinder. This ignition is facilitated by a spark plug, which is composed of two electrodes separated by an air gap. A spark forms across this air gap when a substantial voltage is generated between the electrodes, leading to the ignition of the fuel.
One can generate a large voltage using a car battery of 12 volts with the help of inductors. Inductors are known for opposing rapid...
Internal Combustion Engine01:20

Internal Combustion Engine

The internal combustion engine is a heat engine that uses the byproducts of combustion as the working fluid instead of using a heat transfer medium to transfer heat. The combustion is done in a way that produces high-pressure combustion products that can be expanded through a turbine or piston to create work. Internal combustion engines can again be categorized into three kinds: (1) spark ignition gasoline engines, most commonly used in automobiles, (2) compression ignition diesel engines that...
Turbine-Governor Control01:17

Turbine-Governor Control

Turbine-governor control is crucial for maintaining power system stability by balancing turbine mechanical power output with electrical load demand. This mechanism ensures that generator frequency and rotor speed are within acceptable limits during load variations. Turbine-generator units store kinetic energy due to their rotating masses; this energy is released to meet the load requirement when the load increases. The electrical torque of turbines rises to meet the demand, whereas the...
Instrument Calibration01:12

Instrument Calibration

Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Generator Voltage Control01:21

Generator Voltage Control

Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand, use...
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...

You might also read

Related Articles

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

Sort by
Same author

Additional diagnostic information and interobserver reliability of late imaging 120 minutes after tracer application in MAG3 scintigraphies in children with unilateral hydronephroses.

Journal of pediatric urology·2026
Same author

Effect on compression of lowering the design adiabat in the SQ-n campaign.

Physical review. E·2025
Same author

Direct Experimental Proof of the Principal Role of Reduced High-Mode Hydrodynamic Mix in Recent Ignition Success on NIF.

Physical review letters·2025
Same author

First Demonstration of Improved Fusion Yield with Increased Compression through Reduced Adiabat in Inertial Confinement Fusion Experiments at the National Ignition Facility.

Physical review letters·2025
Same author

Use of hormonal therapy for undescended testis? Results of a worldwide questionnaire.

Actas urologicas espanolas·2025
Same author

Factors associated with pregnancy related complications in women with a history of vesicoureteral reflux: A systematic review by the EAU-YAU Paediatric Urology Working Group.

Actas urologicas espanolas·2025

Related Experiment Video

Updated: May 18, 2026

Blast Quantification Using Hopkinson Pressure Bars
09:41

Blast Quantification Using Hopkinson Pressure Bars

Published on: July 5, 2016

Precision shock tuning on the national ignition facility.

H F Robey1, P M Celliers, J L Kline

  • 1Lawrence Livermore National Laboratory, Livermore, California 94551, USA.

Physical Review Letters
|September 26, 2012
PubMed
Summary

National Ignition Facility experiments achieved record fuel compression using precision-timed shock waves. Improved shock timing significantly reduced adiabat, but the 4th shock velocity was 20% slower than simulations predicted.

More Related Videos

Research and Development of High-performance Explosives
10:33

Research and Development of High-performance Explosives

Published on: February 20, 2016

Improving the Combustion Performance of a Hybrid Rocket Engine using a Novel Fuel Grain with a Nested Helical Structure
07:58

Improving the Combustion Performance of a Hybrid Rocket Engine using a Novel Fuel Grain with a Nested Helical Structure

Published on: January 18, 2021

Related Experiment Videos

Last Updated: May 18, 2026

Blast Quantification Using Hopkinson Pressure Bars
09:41

Blast Quantification Using Hopkinson Pressure Bars

Published on: July 5, 2016

Research and Development of High-performance Explosives
10:33

Research and Development of High-performance Explosives

Published on: February 20, 2016

Improving the Combustion Performance of a Hybrid Rocket Engine using a Novel Fuel Grain with a Nested Helical Structure
07:58

Improving the Combustion Performance of a Hybrid Rocket Engine using a Novel Fuel Grain with a Nested Helical Structure

Published on: January 18, 2021

Area of Science:

  • Nuclear Fusion Science
  • High-Energy-Density Physics
  • Plasma Physics

Background:

  • Achieving fusion power gain requires compressing deuterium-tritium fuel to high areal density (ρR).
  • Ignition implosions at the National Ignition Facility (NIF) use precisely timed shock waves to achieve this compression.
  • Previous implosions faced challenges with fuel entropy and adiabat control.

Purpose of the Study:

  • To perform precision tuning experiments on NIF implosions using optical diagnostics.
  • To directly measure the strength and timing of four shock waves inside a hohlraum-driven capsule.
  • To assess the impact of improved shock timing on fuel compression and adiabat.

Main Methods:

  • Conducted precision tuning experiments on NIF using optical diagnostics.
  • Measured shock wave strength and timing within a cryogenic liquid-deuterium-filled capsule.
  • Analyzed deuterium-tritium layered capsule implosions to evaluate compression.

Main Results:

  • Demonstrated a significant decrease in adiabat compared to previously untuned implosions.
  • Achieved the highest fuel compression (ρR~1.0 g/cm²) to date, exceeding previous records by over 3x.
  • Observed the 4th shock velocity to be 20% slower than predicted by numerical simulations.

Conclusions:

  • Precision shock timing is crucial for reducing fuel adiabat and increasing compression in NIF implosions.
  • The experimental results validate the importance of shock timing for fusion energy gain.
  • Discrepancies in 4th shock velocity highlight areas for improvement in NIF simulation models.