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arXiv 1803.03323physics.plasm-ph
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用于等离子体射流驱动磁惯性聚变的磁化等离子体靶

Magnetized Plasma Target for Plasma-Jet-Driven Magneto-Inertial Fusion

Scott C. Hsu, Samuel J. Langendorf

摘要:

我们确定了β>1磁化等离子体的所需特性和参数,可能具有高度缠结的开放场线,这可能是一个合适的目标,可以通过球形内爆等离子体衬垫压缩到聚变条件[S. C. Hsu等人,IEEE等离子体科学学报40,1287(2012)]通过合并高超音速等离子体射流形成。这个概念被称为等离子体射流驱动的磁惯性聚变(PJMIF)。我们对靶和衬管设定了要求,使得(a)压缩加热在靶中的热传输上占主导地位,以及(b)由于压缩的磁放大在整个内爆中在耗散上占主导地位。我们还评估了要求,以避免漂移不稳定性引起的异常运输和电流驱动的异常电阻率的目标。接下来,我们描述了产生这种磁化的β>1等离子体靶的可能方法。最后,假设这样的目标可以创建,我们评估的可行性的概念验证实验,使用目前可实现的等离子体射流,以证明目标压缩加热在等离子体衬垫动能<~ 100千焦(几百倍以下,需要在PJMIF反应堆)。

英文摘要:

We identify the desired characteristics and parameters of a beta>1 magnetized plasma, possibly with highly tangled, open field lines, that could be a suitable target to be compressed to fusion conditions by a spherically imploding plasma liner [S. C. Hsu et al., IEEE Trans. Plasma Sci. 40, 1287 (2012)] formed by merging hypersonic plasma jets. This concept is known as plasma-jet-driven magneto-inertial fusion (PJMIF). We set requirements on the target and liner such that (a) compressional heating dominates over thermal transport in the target, and (b) magnetic amplification due to compression dominates over dissipation over the entire implosion. We also evaluate the requirements to avoid drift-instability-induced anomalous transport and current-driven anomalous resistivity in the target. Next, we describe possible approaches to create such a magnetized, beta>1 plasma target. Finally, assuming such a target can be created, we evaluate the feasibility of a proof-of-concept experiment using presently achievable plasma jets to demonstrate target compressional heating at a plasma-liner kinetic energy of <~ 100 kJ (a few hundred times below that needed in a PJMIF reactor).

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