Abstract
In this paper, a low voltage non-magnetic ion pump based on pyroelectric materials is proposed, mainly applied in non-magnetic and high vacuum systems such as cold atom inertial sensors. By utilizing the discharge characteristics of pyroelectric materials in vacuum, the discharge current and high-voltage electric field required for the operation of ion pump can be obtained, eliminating the need to apply high voltage to the cathode like traditional ion pumps based on Penning source. The effectiveness of the pyroelectric ion pump is verified by activating it simultaneously with the molecular pump and only activating the ion pump in a 1000 cm3 stainless steel vacuum chamber. The working mechanism of the pyroelectric ion pump is proposed and experimentally verified.
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