Journal article
A TECHNIQUE FOR PRODUCING LARGE DUAL-LAYER PELLETS IN SUPPORT OF DISRUPTION MITIGATION EXPERIMENTS
FUSION SCIENCE AND TECHNOLOGY, Vol.60(2), pp.473-479
2011
Handle:
https://hdl.handle.net/2376/103818
Abstract
A special single-shot pellet injection system that produces and accelerates large cryogenic pellets (similar to 16 mm diameter and composed of D-2 or Ne) to relatively high speeds (>300 and 600 m/s, respectively) was previously developed at the Oak Ridge National Laboratory. Subsequently, a similar system was installed on DIII-D and used successfully in disruption mitigation experiments. To circumvent some operational issues with injecting the large Ne pellets, a technique has been developed in which a relatively thin layer (0.1 to 1.0 mm) of D-2 is frozen on the inner wall of the pipe-gun barrel, followed by filling the core with solid Ne. A fast solenoid valve operating with a light gas (H-2 or He) at relatively high pressure (similar to 70 bar) provides the force necessary to break away the dual-layer pellet and accelerate it. The technique and the initial laboratory tests are described, as well as the implementation and operational issues for fusion experiments.
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Details
- Title
- A TECHNIQUE FOR PRODUCING LARGE DUAL-LAYER PELLETS IN SUPPORT OF DISRUPTION MITIGATION EXPERIMENTS
- Creators
- SK CombsJW LeachmanSJ MeitnerLR BaylorCR FoustN CommauxTC Jernigan
- Publication Details
- FUSION SCIENCE AND TECHNOLOGY, Vol.60(2), pp.473-479
- Academic Unit
- Mechanical and Materials Engineering, School of
- Identifiers
- 99900564301301842
- Language
- English
- Resource Type
- Journal article