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螺线管磁场透镜不可避免地具有球差，因此引起束流发射度增加。
Solenoids show inevitability their spherical aberration, which increases beam effective emittance.
youdao
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螺线管磁场透镜不可避免地具有球差，因此引起束流发射度增加。
Solenoids show inevitability their spherical aberration, which increases beam effective emittance.
youdao