UHV-compatible magnetic material for atom optics

S. A. Hopkins, E. A. Hinds, M. G. Boshier

    Research output: Contribution to journalArticlepeer-review


    Magnetic videotape is of great interest for trapping and guiding cold atomic vapors, but was hitherto considered unsuitable for manipulating Bose-Einstein condensates (BEC) because of the presumed evolution of gas under vacuum. We have studied the outgassing in vacuum of the most promising tape, Ampex 398 Betacam SP. We find that after cleaning in ethanol and baking for 200 h at 100 °C the magnetic patterns are undisturbed and the outgassing is remarkably small: 4 × 10-10 Torr 1s-1cm-2, due mostly to hydrogen. This makes the tape exceedingly attractive for manipulation of BEC.
    Original languageEnglish
    Pages (from-to)51-54
    Number of pages3
    JournalApplied Physics B: Lasers and Optics
    Issue number1
    Publication statusPublished - 2001


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