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在JM-400静电脉冲加速器中,安装在大三通闸阀后面的圆柱形四极电透镜具有强聚焦的功能,可以将φ30 mm平行离子束会聚成φ5 mm以下的束径。双元四极电透镜的透镜见图1。八个电极用1Cr 18 Ni 9 Ti制成,每个电极长60 mm,宽28 mm,用螺栓均匀地固定在绝缘壳体上。两组电极边缘相距24 mm。透镜绝缘壳体用螺栓同轴安装在铝合金外壳内,使其工作时保持真空。绝缘壳体是四极电透镜的关键零件,它要支撑八个电极构成内径φ40_0~(+1.0)mm的同轴
In the JM-400 electrostatic pulse accelerator, a cylindrical quadrupole lens mounted behind a three-way gate valve has a strong focus function to converge the φ30 mm parallel ion beam to a beam diameter of φ5 mm or less. Dual quadrupole lens lens shown in Figure 1. Eight electrodes are made of 1Cr18Ni9Ti, each 60 mm long and 28 mm wide, bolted evenly over the insulative housing. The two electrode edges are 24 mm apart. The lens insulation housing is mounted coaxially within the aluminum housing with bolts to keep the vacuum in operation. Insulating housing is the key part of the quadrupole lens, it should support eight electrodes constitute the inner diameter φ40_0 ~ (+1.0) mm coaxial