Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Effects of EDTA on End-Point Detection Methods

Effects of EDTA on End-Point Detection Methods

Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a result, EDTA...

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

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

Microturbulence Suppression by Alfvén Eigenmodes in the DIII-D Tokamak.

Physical review letters·2026

Same author

Improved Transition Management of Adolescents and Young Adults With Allergy and/or Asthma: An EAACI Task Force Report on a Follow-Up European Survey.

Allergy·2025

Same author

High speed fast-ion D-alpha spectrometer for the NSTX-U tokamak.

The Review of scientific instruments·2024

Same author

Design of a Thomson scattering diagnostic for the SMall Aspect Ratio Tokamak (SMART).

The Review of scientific instruments·2024

Same author

Perturbed Ion Temperature and Toroidal Flow Profile Measurements in Rotating Neoclassical Tearing Mode Magnetic Islands.

Physical review letters·2024

Same author

Studying fast-ion populations using oscillations in solid-state neutral-particle analyzer signal and neutral-beam injection power.

The Review of scientific instruments·2024

Search research articles

Related Experiment Video

Updated: Jun 27, 2026

Millisecond Hydrogen/Deuterium-Exchange Mass Spectrometry for the Study of Alpha-Synuclein Structural Dynamics Under Physiological Conditions

Millisecond Hydrogen/Deuterium-Exchange Mass Spectrometry for the Study of Alpha-Synuclein Structural Dynamics Under Physiological Conditions

Published on: June 23, 2022

The NSTX fast-ion D-alpha diagnostic.

M Podestà¹, W W Heidbrink, R E Bell

¹Department of Physics and Astronomy, University of California Irvine, California 92697, USA.

The Review of Scientific Instruments

|December 3, 2008

Summary

This summary is machine-generated.

New diagnostics measure fast ion behavior in NSTX plasmas using charge-exchange recombination spectroscopy. This technique provides detailed spatial, temporal, and energy insights into plasma dynamics.

More Related Videos

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Published on: November 26, 2013

Related Experiment Videos

Last Updated: Jun 27, 2026

Millisecond Hydrogen/Deuterium-Exchange Mass Spectrometry for the Study of Alpha-Synuclein Structural Dynamics Under Physiological Conditions

Millisecond Hydrogen/Deuterium-Exchange Mass Spectrometry for the Study of Alpha-Synuclein Structural Dynamics Under Physiological Conditions

Published on: June 23, 2022

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Published on: November 26, 2013

Area of Science:

Nuclear Fusion Science
Plasma Physics
Diagnostic Techniques

Background:

Fast ions play a crucial role in heating and sustaining NSTX plasmas.
Understanding fast ion dynamics is essential for controlling fusion reactions.
Existing diagnostic methods have limitations in resolving fast ion behavior.

Purpose of the Study:

To introduce and describe a new diagnostic system for energy-resolved measurements of fast ions in NSTX plasmas.
To detail the spatial, temporal, and energy resolution capabilities of the new diagnostic.
To present initial results from the 2008 NSTX operational run.

Main Methods:

Active charge-exchange recombination spectroscopy is the core technique.
Two complementary systems are employed: a spectrometer with a CCD detector and a multianode photomultiplier tube.
Paired views in each channel allow for direct background signal subtraction.

Main Results:

The first system offers 16 channels with 5 cm spatial, 10 ms temporal, and 10 keV energy resolution.
The second system monitors energy-integrated fast-ion signals on ~20 microsecond timescales at three radii.
Demonstrated capability to infer fast-ion signals from D(alpha) line emissions.

Conclusions:

The developed diagnostic systems provide unprecedented insights into fast ion behavior in NSTX.
These diagnostics are crucial for advancing the understanding and control of fusion plasmas.
The presented data validates the effectiveness of the new diagnostic approach.