The supersonic short-pulse helium atomic beam and its metastables were studied. A pulsed high-density helium atomic beam was ejected from a nozzle, collimated by a skimmer and then flowed through a penning-type discharge device. After discharging, the metastable density of the pulsed helium atomic beam was up to 1.24 x 10(11) cm(-3). Excellent symmetry of atomic beam profile was obtained. The deviation of angle of the atomic beam with respect to the axis was less than 0.14 degrees. The mean diffusion angle of the pulsed beam was 4 degrees, and a mean velocity of atomic beam was up to 1350 ms(-1). Laser induced fluorescence of metastable atoms has been studied.
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机译：研究了超音速短脉冲氦原子束及其亚稳态。从喷嘴喷出脉冲状的高密度氦原子束，并用分离器进行准直，然后流过笔式排放装置。放电后，脉冲氦原子束的亚稳态密度高达1.24 x 10（11）cm（-3）。获得了极好的原子束轮廓对称性。原子束相对于轴的角度偏差小于0.14度。脉冲束的平均扩散角为4度，原子束的平均速度高达1350 ms（-1）。已经研究了激光诱导的亚稳定原子的荧光。
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