Related Experiment Video
Updated: Oct 26, 2025
08:22
Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
7.0K
Main ion charge exchange recombination spectroscopy on C-2W FRC plasmas
Deepak K Gupta1, Marcel Nations1, James Sweeney1
1TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA.
The Review of Scientific Instruments
|August 3, 2021
Summary
A new diagnostic system, main ion charge exchange recombination spectroscopy (mChERS), measures deuterium ion velocity and temperature in the C-2W field-reversed configuration (FRC) device. This system offers fast, multi-point measurements crucial for fusion energy research.
Area of Science:
- Plasma Physics
- Fusion Energy Research
- Spectroscopy
Background:
- The C-2W device, also known as Norman, is a field-reversed configuration (FRC) device crucial for fusion energy research.
- Accurate measurement of plasma properties like ion velocity and temperature is essential for understanding and controlling fusion reactions.
Purpose of the Study:
- To develop and present a novel diagnostic system, main ion charge exchange recombination spectroscopy (mChERS), for the C-2W FRC.
- To measure the velocity and temperature of main deuterium ions within the FRC plasma.
Main Methods:
- Utilized a modulated diagnostic neutral beam (DNB) of hydrogen (40 keV, 8.5 A) to generate charge exchange signals.
- Employed a high-speed camera for simultaneous measurements at five spatial locations.
- Leveraged the DNB's fast modulation frequency (up to 10 kHz) for high time resolution.
Main Results:
- Successfully designed and implemented the mChERS diagnostic system.
- Obtained initial experimental data demonstrating the system's capabilities.
- Achieved simultaneous measurements at multiple spatial points with high temporal resolution.
Conclusions:
- The mChERS diagnostic is a valuable tool for characterizing plasma in the C-2W FRC.
- The system's fast modulation capability offers unique advantages for fusion research.
- The presented data validates the design and effectiveness of the mChERS diagnostic.
Related Concept Videos
01:09Ion-Exchange Chromatography
1.0K
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
1.0K
01:17Ion Exchange
734
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
734
01:19Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview
1.1K
In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
1.1K
01:12Double Resonance Techniques: Overview
376
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
376
01:04¹³C NMR: ¹H–¹³C Decoupling
1.3K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.3K
01:20Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences
721
Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
721