Approaches to Rydberg spatial distribution measurement Graham Lochead 24/01/11.

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Presentation transcript:

Approaches to Rydberg spatial distribution measurement Graham Lochead 24/01/11

Outline Rydberg spatial distribution Our approach and progress Raithel’s approach

Rydberg spatial distribution Ground stateRydberg state Distance (microns) Density (arb. units) V Low density High density

Experimental procedure Automatic translation stage Lens setup

Autoionization Allows independent Rydberg excitation and investigation Ion detection is very sensitive 5s 2 5s5p5sns(d)5pns(d)5s 1/2 + Graham Lochead 25/10/10

Progress towards experiment   Translation stage testing Lens design and testing Incorporation with main LabVIEW program Laser locking  Graham Lochead 25/10/10  Rest of the optical layout 

Raithel’s approach Laser pulses Field ionization 10 micron waist for excitation pulse 58 x magnification Leads to ~2 micron resolution at MOT

What is measured: Spatially resolved ion signals Single shot 500 summed images

Saturation

Blockade dependent correlations F. ROBICHEAUX AND J. V. HERNÁNDEZ, PRA 72, (2005)

Auto-correlation Cross-correlation of a signal with itself Continuous Discrete1 = correlated0 = un-correlated-1 = anti-correlated

Auto-correlation results Radius (microns)

Outlook Our experiment nearly ready Other groups are also studying this

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