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Updated: Jul 13, 2026
08:22
Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Multichannel detector for ion temperature determination in vacuum ultraviolet spectrum
1Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, C.P. 6165, 13083-970 Campinas, Sao Paulo, Brazil.
The Review of Scientific Instruments
|July 7, 2007
Summary
This study measured carbon and oxygen ion temperatures in the NOVA-UNICAMP tokamak using a VUV spectrometer. Ion temperatures ranged from 30 to 70 eV during tokamak discharge.
Area of Science:
- Plasma Physics
- Spectroscopy
- Fusion Energy Research
Background:
- Tokamaks are crucial for fusion energy research.
- Accurate ion temperature measurement is vital for understanding plasma behavior.
- Previous methods had limitations in precision for tokamak plasma diagnostics.
Purpose of the Study:
- To analyze the temperature of carbon and oxygen ions in the NOVA-UNICAMP tokamak.
- To optimize a vacuum ultraviolet spectrometer for precise plasma measurements.
- To reduce experimental errors in ion temperature determination.
Main Methods:
- Utilized a vacuum ultraviolet spectrometer with a charge-coupled device and an open multichannel plate.
- Optimized and aligned the detection system to minimize instrumental broadening.
- Analyzed higher-order diffractions of emissions for improved accuracy.
Main Results:
- Successfully monitored ion temperature during tokamak discharge.
- Determined carbon and oxygen ion temperatures to be between 30 and 70 eV.
- Demonstrated reduced experimental errors through optimized spectroscopic analysis.
Conclusions:
- The optimized VUV spectrometer provides reliable measurements of ion temperature in tokamaks.
- The measured ion temperatures are within the expected range for tokamak operations.
- This technique enhances the diagnostic capabilities for fusion plasma research.
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