| 摘要 |
PURPOSE:To prevent the flowing of liquidified Cs to the outside of an atom beam radiation part through a collimator by providing penetratingly a thin tube flowing a beam source vapor to the minute pierced part of a barrier plate between a beam source storage part and an atom beam radiation part in a form that both ends are projected respectively from the face of the barrier. CONSTITUTION:A barrier plate 25 is provided between the beam source storage pat 24 and the atom beam radiation part 29 and the thin tube 41 through which the beam source vapor flows is provided penetratingly to the minute hole pierced part of the barrier plate 25 in a form that both ends are projected respectively from the said barrier wall face. In flowing the Cs in the said Cs ample 21 liquidified by the heat conduction from the atom beam radiation section 29 into the beam source storage part 24, the liquidified Cs is vaporized by the barrier plate 25 heated by the heater 27 of the heat part 29. The Cs vapor passes in the flowing thin tube 41 provided penetrated in a form to be projected to the said barrier plate 25 and is radiated through the collimator 28 as the Cs atom beam 33 to the cavity resonator. Thus, it is prevented that the liquidified Cs 22 flows into the tube 41 due to vibration or shock.
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