Aim: High Priority: History effects, tips shapes, verify results

Aim: High Priority: History effects, tips shapes, verify results

1. Si: Low n: UV Axial: checking effect of tip shape

   • Go from Axial to Transverse
     • Change in evaporation position
       • collect ~200,000 atoms
         • Shift to green in axial. Collect 700,000 atoms for steady state
           • Go to transverse
             • Non uniform density map
               • Colect 750,000 atoms and TEM image: Steady state tip shape for Uv- green transition
                 • New tip: Start in green Axial
                   • Non uniform Density map
                     • Collect 750,00 atoms and TEM image: Steady state tip shape for only green
                   • Uniform density map
                     • Move to IR: Axial ==> go to trans
                       • Uniform Density map
                         • New Tip: Start in IR: Go to Trans
                           • Uniform Density Map
                             • Go to UV
                               • Go to IR
                                 • Uniform Density Map
                                 • Non Uniform Density Map
                                   • Collect 750,000 atoms and TEM image: Steady state tip shape for UV-IR Transition
                           • Non- Uniform Density Map
                             • Collect 750,000 atoms and TEM image: Steady state tip shape for IR only
                       • Non-uniform density map
                         • Collect 750,000 atoms and TEM image: Steady state tip shape for green- IR transition
             • No change in 2d map
               • Exp not repeatable:
                 • Repeat experiment with the old tip
     • No change in evaporation position