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Hui LIAO (廖晖), Munan LIN (林木楠), Ming LIU(刘明), Guanghui ZHU (朱光辉), Zhida YANG (杨智达), Peiyun SHI (时培运), Ming LUO (罗明), Xuan SUN (孙玄). Translation speed measurements of hydrogen, helium, and argon field-reversed configurations in the central cell of a KMAX mirror device[J]. Plasma Science and Technology, 2019, 21(8): 85102-085102. DOI: 10.1088/2058-6272/ab19e8
Citation: Hui LIAO (廖晖), Munan LIN (林木楠), Ming LIU(刘明), Guanghui ZHU (朱光辉), Zhida YANG (杨智达), Peiyun SHI (时培运), Ming LUO (罗明), Xuan SUN (孙玄). Translation speed measurements of hydrogen, helium, and argon field-reversed configurations in the central cell of a KMAX mirror device[J]. Plasma Science and Technology, 2019, 21(8): 85102-085102. DOI: 10.1088/2058-6272/ab19e8

Translation speed measurements of hydrogen, helium, and argon field-reversed configurations in the central cell of a KMAX mirror device

  • A series of experimental results of field-reversed configurations (FRCs) on a KMAX (Keda Mirror with AXisymmetricity) tandem mirror machine are reported. Single-side FRC translation processes with three different gas species were measured by avalanche photodiodes. Consistent with the theoretical prediction, the measured FRC speeds were inversely proportional to the square root of the ion mass. However, the speeds of the hydrogen FRC increased even in a uniform magnetic field region while the speeds of the helium and argon FRCs decreased. Possible mechanisms are discussed. The speed of the second pass due to the reflection of the mirror fields was found to be ∼1/3 of the first pass speed. The internal magnetic fields were
    measured for a colliding-merging argon FRC, and the results show that, even for very slowmoving FRCs, merging can occur.
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