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加拿大不列颠哥伦比亚大学的研究人员研制成功液态氢脉冲原子钟,它比目前最准确的氢脉冲原子钟要准确10倍,在理论上准确一千倍,三亿年只有一秒钟误差。这种高精度的原子钟是在低温下(0.5K)进行动作的。由于低温化而使电气噪声大幅度下降,热膨胀效应也非常小.在通常的氢脉冲中,为了防止氢原子吸附在真空管的内壁上,涂上聚四氟乙烯薄膜,但它在低温条件下没有效果.然而,在液态氢脉冲中,液态氢的薄膜也能起聚四氟乙烯薄膜的作用。
Researchers at the University of British Columbia in Canada have successfully developed liquid hydrogen pulsed atomic clocks that are 10 times more accurate than the most accurate hydrogen pulsing atomic clocks currently available, theoretically a thousand times more accurate, and have a one-second error of 300 million years. This high-precision atomic clock operates at low temperatures (0.5K). In the usual hydrogen pulse, in order to prevent the adsorption of hydrogen atoms on the inner wall of the vacuum tube, coated with Teflon film, but it is not at low temperatures However, in the case of liquid hydrogen pulses, the film of liquid hydrogen can also act as a polytetrafluoroethylene film.