RF-Trapped Chip Scale Helium Ion Pump (RFT-CHIP)

A miniaturized (1 cc) magnet-less RF electron trap for a helium ion pump is studied, addressing challenges associated with active pumping of atomic microsystems at low pressures (1 nanoTorr). Two tasks are described: experimental verification of electron trapping, and numerical parametric modeling o...

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Bibliographic Details
Main Authors: Gianchandani,Yogesh, Kushner,Mark, Green,Scott, Markosyan,Aram, Deng,Shiyang
Format: Report
Language:English
Subjects:
electron trap
electrons
ion pumps
magnet-less
microelectromechanical systems
microsystems
Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
radio frequency power
Vacuum pumps
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Description
Summary:A miniaturized (1 cc) magnet-less RF electron trap for a helium ion pump is studied, addressing challenges associated with active pumping of atomic microsystems at low pressures (1 nanoTorr). Two tasks are described: experimental verification of electron trapping, and numerical parametric modeling of electron trapping and ionization. It is found experimentally that the steady state floating potentials on electrodes near the trap become more negative after applying certain RF power levels, demonstrating electron trapping. The electron density within the trap is estimated via numerical modeling as 1000x the density in the electron beam. Estimated Ionization rates are as high as 60E6/cc/s.