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Numerical Study for Laser Source Protection from Alpha Particles by Magnetic Fields in a Laser Fusion Reactor

机译：激光聚变反应堆中磁场对Alpha粒子激光源防护的数值研究

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A possible method for protecting beam ports and laser sources from alpha particles which are produced by a nuclear fusion in the fast ignition laser fusion power plant (KOYO-Fast) is proposed. Two simple dipolar magnetic fields generated by two coils installed at the tip of the beam port and at the side of the beam port are used for protecting the alpha particles coming into the inside of the beam port and colliding to the tip surface of the beam port. To calculate the behavior of alpha particles in the magnetic field, we use a 3D hybrid numerical simulation code. As a result, the intensity of 0.9 T of the magnetic flux density at the tip of the beam port is large enough for achieving the 10% reduction of the collision energy of the alpha particles to the tip surface of the beam port compared with the case without protection. Furthermore, the intensity of 1.35 T of the magnetic flux density at the center of the coil installed at the side of the beam port can guide the alpha particles coming into the inside of the beam port to the outside liquid wall perfectly.
机译：提出了一种保护光束端口和激光源不受α粒子（可能由快速点火激光聚变电厂（KOYO-Fast）中的核聚变产生）的可能方法。由安装在光束端口尖端和光束端口侧面的两个线圈产生的两个简单的偶极磁场用于保护进入光束端口内部并碰撞到光束端口尖端表面的α粒子。要计算磁场中α粒子的行为，我们使用3D混合数值模拟代码。结果，与情况相比，在束端口的尖端处的磁通密度的0.9 T的强度足够大，以实现将α粒子对束端口的尖端表面的碰撞能量降低10％。没有保护。此外，安装在束口侧面的线圈的中心处的磁通密度的1.35T的强度可以将进入束口内部的α粒子完美地引导至外部液壁。

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