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Proving DRACO will deliver
The United States is now closer than it has been in over five decades to launching the first nuclear thermal rocket into space, thanks to DRACO—the Demonstration Rocket for Agile Cislunar Orbit.
A.A. Ivanov, S.V. Murakhtin
Fusion Science and Technology | Volume 39 | Number 1 | January 2001 | Pages 209-212
Poster Presentations | doi.org/10.13182/FST01-A11963443
Articles are hosted by Taylor and Francis Online.
The neutral beam scattering diagnostic1 has been developed to measure the ion temperature of the target plasma in the Gas-Dynamic Trap (GDT) experiment. In the GDT, the target plasma density was about 1014 cm−3, the ion temperature was estimated from diamagnetic loops data combined with electron temperature obtained by Thompson scattering to be maximally ≈100 eV. The developed special diagnostic based on small angle scattering of neutral beam particles enables to perform more accurate measurements of the ion temperature. The beam of helium atoms is injected at the angle of 8° to the observation direction. The injection energy is 10 keV, the total equivalent beam current is 1A. The neutral particles are scattered on the plasma ions and enter the 45″ electrostatic analyzer. The ion temperature was inferred from the measured width of the energy distribution function of the scattered particles
This diagnostic was applied to measure temporal variation of the ion temperature during neutral beam heating. The electron temperature was simultaneously measured by Thomson scattering of a ruby laser light. The data will be used to estimate the energy balance of the ion component of the target plasma during neutral beam heating.