TOKES simulations of mitigated disruption thermal quenches in ITER
| Autor: | Michael Lehnen, G. Saibene, S. Pestchanyi, R.A. Pitts |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Pellet size Mechanical Engineering digestive oral and skin physiology Pellets Bremsstrahlung Radiation 01 natural sciences 010305 fluids & plasmas Core (optical fiber) Nuclear Energy and Engineering 0103 physical sciences Pellet Thermal General Materials Science Atomic physics 010306 general physics Recombination radiation Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 161:111976 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2020.111976 |
| Popis: | TOKES simulations of mixed Ne/D2 pellet injection through 1 equatorial launcher into an ITER discharge of 280 MJ thermal plasma energy was carried out. Two kinds of pellets were simulated: ‘large’, containing 1.1∙1024 D2 molecules and ‘small’ with 2.6∙1023 D2 molecules, both with various amount of Ne and correspondingly lower quantities of D to preserve the pellet size. It was found that the physics of the core energy radiation by the mixed pellet is different from that of the pure Ne pellet. In case of the mixed pellet injection, bremsstrahlung and recombination radiation make a significant contribution to the core cooling along with the Ne line radiation, the latter being the only mechanism for pure Ne pellet injection. The minimum Ne amount in the mixed pellet, which radiates more than 90 % of the core plasma energy (the threshold) has been found to be 1∙1020 Ne atoms for the large pellet and 2∙1021 atoms for the small one. |
| Databáze: | OpenAIRE |
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