Laser Consortium Journal Clubs and Discussion Meetings

Tuesday, 12 October 2010

JC: Richard: Inconsistencies between two attosecond pulse metrology methods: A comparative study

The two basic approaches underlying most of the metrology of attosecond pulse trains are compared in the spectral region ~14-24 eV, that is, the second-order intensity volume autocorrelation and the resolution of attosecond beating by interference of two photon transitions (RABITT). They give rather dissimilar pulse durations. It is concluded that for the present experimental conditions RABITT may underestimate the duration under measurement, due to variations of the driving intensity, but in conjunction with theory allows an estimation of the relative contributions of two different electron trajectories to the extreme-ultraviolet (XUV) radiation.
http://pra.aps.org/abstract/PRA/v82/i2/e021402
PPT slides...

Tuesday, 5 October 2010

DM: Ryan: Tunneling discussion

http://prl.aps.org/abstract/PRL/v105/i13/e133002 which directly measures tunneling in a strong field. I may also speak about: http://www.nature.com/nphys/journal/v4/n7/full/nphys982.html which claims to have measured tunneling time I will speak about that and offer a `tutorial' of sorts on tunneling covering the main features of tunneling and the basic theories behind that and the 3-step model. It will be a discussion of the paper coupled with a short lesson on the stuff that I am most often asked about by dirty experimentalists.
If there are specific things people want to know send Ryan an email.

Tuesday, 21 September 2010

DM: Thomas: SMURF

after the promising results of the 1st SMURF experiment ( http://www.opticsinfobase.org/view_article.cfm?gotourl=http%3A%2F%2Fwww.opticsinfobase.org%2FDirectPDFAccess%2F75E1963E-C2E1-A709-3EAB91454AB19322_196721.pdf%3Fda%3D1%26id%3D196721%26seq%3D0%26mobile%3Dno&org= ) we are going to attempt to push the technique further. The 1st experiment having been carried out in under 2 days with no forward planning what so ever, so this is our chance to attempt to do it properly. during this presentation i will quickly run through what other people have done in the recent past in terms of water-window xray generation, what the smurf is likely to bring extra, and ask for people's inputs on a variety of still undecided parameters and techniques.
to make the discussion more lively tobi is going to buy us loads of scrumpy cider!

slides: http://charles.qols.ph.ic.ac.uk/~twitting/consJCDM/material/20100921_DM_Thomas_SMURF/SMURF2.ppt