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本文分析了平板快裂变室电流脉冲的特性,描述在充甲烷气体下电极距离d、外加电场E和充气压力P对裂变室性能的影响。试验表明,使用所试制的快电流放大器,裂变室选取d=3毫米,E=1666.7伏/厘米和P=1大气压时,已使0.24微克~(242)Cm(2.85×10~7α衰变/秒)的α脉冲与自发裂变脉冲分开,记录裂变效率～94%。在试验基础上最后制成一个多路~(239)Pu快裂变室,总载钚量105毫克。在每路载钚量～20毫克(4.52×10~7α衰变/秒)的情况下,α与裂变脉冲仍能分开。
In this paper, the characteristics of the current pulse in the plate fast fission chamber are analyzed. The influence of the electrode distance d, the applied electric field E and the inflation pressure P on the performance of the fission chamber is described. The experimental results show that 0.24 microgram ~ (242) Cm (2.85 × 10 ~ 7α decay / second) has been obtained at the d = 3mm, E = 1666.7v / cm and P = 1 atmospheres using the fabricated fast current amplifier. ) Of the alpha pulse was separated from the spontaneous fission pulse and the fission efficiency was recorded ~ 94%. Based on the test, a multi-channel ~ (239) Pu fast fission chamber was finally fabricated with a total loading of 105 mg plutonium. In each case of plutonium loading ~ 20 mg (4.52 × 10 ~ 7α decay / sec), α and fission pulse can still be separated.