Pumping performance of pebble drop divertor
Pumping performance of pebble drop divertor
复制标题
卵石滴偏滤器的泵送性能
DOI：
10.1016/s0920-3796(00)00446-4
复制
发表时间：
2000
影响因子：
1.7
通讯作者：
M. Nishikawa
中科院分区：
文献类型：
--
作者：
K. Matsuhiro;M. Isobe;Y. Ueda;M. Nishikawa
提出了用于小型高功率密度聚变反应堆的卵石滴分流器概念。在这个概念中，燃料气体可以通过使用鹅卵石表层的燃料气体吸集器泵出。我们感兴趣的是利用离子辐照后石墨的瞬态氢释放泵送。本文通过实验研究了卵石滴分流器的瞬态氢释放泵送性能。实验中，用高通量氢束照射石墨样品，最大通量为1×1022H/m2s （H3+,5 keV）。辐照后，测量样品的氢释放量，样品温度保持在辐照温度。在所有情况下均观察到瞬时氢释放。瞬态氢释放量随温度升高而增加。在973 K温度下，最大瞬时氢释放量为4.4×1020H/m2。实验结果表明，球滴式导流器的抽气性能能够满足ITER稳态运行所需的燃料供气要求。
The pebble drop divertor concept was proposed for compact and high power density fusion reactors. In this concept, fuel gas can be pumped out by using fuel gas gettering by the surface layer of the pebbles. We are interested in the pumping by using transient hydrogen release from graphite just after ion irradiation. In this study, the pumping performance of the pebble drop divertor by using the transient hydrogen release is experimentally studied. In the experiment, the graphite samples were irradiated by high flux hydrogen beam with a maximum flux of 1×1022H/m2s (H3+,5 keV). Just after the irradiation, hydrogen release from the samples was measured with keeping the sample temperature at the temperature reached by the irradiation. The transient hydrogen release was observed in all cases. The amount of the transient hydrogen release increased with increasing temperature. The amount of maximum transient hydrogen release was 4.4×1020H/m2at the temperature of 973 K. From this result, the pumping performance of the pebble drop divertor will satisfy the specification of fuel gas feed needed in steady state operation of ITER.