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End of 2007

End of 2007. SPECTRAP’ is being built in London to trap Ca+ ions with real imaging capabilities Early RF operation expected Jan 2008 Penning operation Feb/Mar 2008. Experimental Plans. RF trap ● less complex system to start debugging a new trap

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End of 2007

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  1. End of 2007 • SPECTRAP’ is being built in London to trap Ca+ ions with real imaging capabilities • Early RF operation expected Jan 2008 • Penning operation Feb/Mar 2008

  2. Experimental Plans • RF trap ● less complex system to start debugging a new trap ● initial tests with Calcium using existing Laser system ● optimise internal/external optics and loading parameters 2. Penning trap ● investigate cloud compression using the rotating wall technique for which we already have the electronic driver in London ● look for fluorescence from Pb+ weak infrared transition at 710 nm to gain experience of low LIF levels

  3. Progress.. • Complete vacuum system assembled and tested - pressure ~10-9mbar • Trap with internal optics assembled and aligned - knife edge test • Calcium oven and filament attached – electron current to all electrodes detected and glow from oven observed • RF electronics operational - 500V@1MHz (q=0.7) or 2.6MHz

  4. Progress.. • Complete vacuum system assembled and tested - pressure ~10-9mbar • Trap with internal optics assembled and aligned - knife edge test • Calcium oven and filament attached – electron current to all electrodes detected and glow from oven observed • RF electronics operational - 500V@1MHz (q=0.7) or 2.6MHz

  5. Spherical mirror => enhancement of light collection efficiency from 1.3% to 2.5%

  6. Progress.. • Complete vacuum system assembled and tested - pressure ~10-9mbar • Trap with internal optics assembled and aligned - knife edge test • Calcium oven and filament attached – electron current to all electrodes detected and glow from oven observed • RF electronics operational - 500V@1MHz (q=0.7) or 2.6MHz

  7. Progress.. • Complete vacuum system assembled and tested - pressure ~10-9mbar • Trap with internal optics assembled and aligned - knife edge test • Calcium oven and filament attached – electron current to all electrodes detected and glow from oven observed • RF electronics operational - 500V@1MHz (q=0.7) or 2.6MHz

  8. Last week.. • First trials in RF operation - Ca+ ions not optically observed • Possible problems - wavelengths? verified by PADTRAP • - focal position of laser beams in trap? • - position of detector pinhole? • - Calcium oven not emitting as expected? • - pressure in vacuum system not good enough?

  9. Outlook • 2-3 weeks optical detection of Ca+ in RF operation • Setup of external optics for superconducting magnet - fibre optic bundle, folding mirrors etc. • 1-2 months begin Penning trap trials.

  10. Ion Trapping @ Imperial College Ca+ ion in a 0.98 Tesla trapping field 5 reds at present

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