Physics Colloquium
Dr. Kevin Carnes
K-State Department of Physics

Kevin Carnes


From Ion Beams to Laser Beams:  28 Years of AMO Physics at the J. R. Macdonald Lab

102 Cardwell Hall
February 11, 2013
4:30 p.m.

I will give a brief overview of the development of the J. R. Macdonald Laboratory’s experimental capabilities since I arrived at K-State in 1984.  Over the years, we expanded our accelerator facilities to cement our role as one of the premier AMO collisions facilities in the country.  In the first years of the new millennium, we made the switch from accelerators to ultrafast lasers with the development of the Kansas Light Source.  We have now established ourselves as a leading ultrafast lab, as evidenced by the recent installation of the PULSAR laser. 

Despite the change in emphasis, our expertise in momentum imaging has been a constant throughout.  Foundational to that expertise has been our use of delay-line detectors and our advanced event-mode multi-parameter data acquisition and analysis system.  I will cover this in some depth.

The bulk of the talk will focus on our research into the interaction of beams of molecular ions, in particular the H3+/D3+ ion, with ultrafast lasers.  H3+ is the simplest polyatomic molecule and nicely illustrates both the advantages of using a molecular ion beam as a target for the laser and the information we can gain using our coincidence 3D momentum imaging technique. I will summarize our results, reported in several publications, such as the identification of dissociation pathways, orientation preferences for dissociation and ionization, and kinetic energy released in the various dissociation/ionization processes.



Refreshments in CW 119 at 4:15 p.m.