Production and launch studies of cryogenic pellets for the ITER Disruption Mitigation System

IF 3.5 1区物理与天体物理 Q1 PHYSICS, FLUIDS & PLASMAS

Nuclear Fusion Pub Date : 2024-07-23 DOI:10.1088/1741-4326/ad6676

S. Zoletnik, Gergely Bartók, Attila Buzás, G. Cseh, D. Dunai, Gábor Gárdonyi, S. Hegedűs, Marcell Málics, Gabor Lajos Kocsis, D. Nagy, D. Réfy, T. Szabolics, T. Szepesi, Márton Vavrik, M. Vécsei, E. Walcz, Stefan Jachmich, U. Kruezi, M. Lehnen

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Abstract

A support laboratory has been set up to study pellet production, launch and shattering of cryogenic protium, deuterium, and neon pellets for the ITER Disruption Mitigation System (DMS), which plans to use 28.5 x 57 mm (diameter x length) protium, neon an mixture pellets in the Shattered Pellet Injectors. Such large protium pellets have not been produced and launched before, therefore the desublimation and launch process have been studied in detail in two steps. First 19 mm diameter pellets were produced, followed by the demonstration of the final pellet size. Pellet desublimation recipes were established for all pellet types, and it was found that, under certain conditions, even the large neon pellets can be launched with a propellent gas pulse, without requiring a mechanical punch device. This is attributed to cryogenic snow formation on the surface of the pellet. Conditions for the snow formation are studied and tendencies are understood using simple calculations.

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用于热核实验堆中断缓解系统的低温颗粒的生产和发射研究

建立了一个支持实验室，以研究用于热核实验堆中断缓解系统（DMS）的低温氕、氘和氖颗粒的生产、发射和碎裂，该系统计划在碎裂颗粒喷射器中使用 28.5 x 57 毫米（直径 x 长度）的氕、氖和混合物颗粒。以前从未生产和发射过如此大的氕弹丸，因此分两步详细研究了脱附和发射过程。首先生产直径为 19 毫米的颗粒，然后展示最终的颗粒尺寸。研究发现，在某些条件下，即使是大型氖颗粒也可以用推进气体脉冲发射，而不需要机械打孔装置。这归因于颗粒表面低温雪的形成。通过简单的计算，研究了雪形成的条件并了解了雪形成的趋势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Fusion 物理-物理：核物理

CiteScore

6.30

自引率

39.40%

发文量

411

审稿时长

2.6 months

期刊介绍： Nuclear Fusion publishes articles making significant advances to the field of controlled thermonuclear fusion. The journal scope includes: -the production, heating and confinement of high temperature plasmas; -the physical properties of such plasmas; -the experimental or theoretical methods of exploring or explaining them; -fusion reactor physics; -reactor concepts; and -fusion technologies. The journal has a dedicated Associate Editor for inertial confinement fusion.