The invention discloses a vacuum maintaining device for a
hydrogen atom
laser, which comprises a neck channel arranged between an
ionization bubble and an atom storage bubble, at least one adsorption pump and an
ion pump, the
ion pump is communicated with the adsorption pump, and the vacuum maintaining device is characterized in that the number of the adsorption pump is at least one; and each adsorption pump is arranged on the side edge of the neck channel and is independently communicated with the neck channel. According to the technical scheme, when the adsorbent is baked, activated and heated, a very complex cooling circulation
system is not needed to cool the
ionization bubble, the state selection
magnet and the nearby shell, a large amount of
heat energy is prevented from being transmitted to the
ionization bubble, the state selection
magnet and other components, and the vacuum failure of the
hydrogen atom
laser or the magnetic loss of the state selection
magnet is avoided. And the adsorption pump is not sleeved on the neck channel any more, so that the volume structure is more compact, and the volume and the weight of the adsorption pump are greatly reduced. And after the valve and the
flange are additionally arranged on the adsorption pump, the adsorption pump can be conveniently backed up, disassembled and assembled under the condition that the vacuum environment of the
hydrogen atom
laser is not damaged, and the service life of the
hydrogen atom laser is effectively prolonged.