"Exploring matter at the angstrom-femtosecond space and time scales with X-ray free-electron lasers," by Claudio Pellegrini (UCLA & Stanford)

Date: 
Tuesday, January 24, 2017 - 4:00pm to 5:00pm
Series: 
Bhaumik Lectures

Bhaumik Lecture

Kerckhoff Grand Salon, Kerckhoff Hall
Tuesday, January 24, 2017
3:30 PM Bhaumik Tea refreshments
4-5 PM Lecture

Guest Speaker: Claudio Pellegrini (UCLA & Stanford)​

Talk Title: "Exploring matter at the angstrom-femtosecond space and time scales with X-ray free-electron lasers"

Abstract: 

X-ray sources coherence and brightness has been increased by ten orders of magnitude by a revolution enabled by X-ray free-electron lasers (XFELs). XFELs use a self-organization, collective phenomenon to generate high intensity coherent photon pulses at wavelengths from nanometers to less than 1 Å and duration of about one to 100 femtosecond. They allow for the first time the study of X-ray non-linear science and the exploration of the structure and dynamics of atomic, molecular, and solid state systems at the angstrom-femtosecond space and time scale. In this talk I review the physical principles, present status and future developments of XFELs and discuss some of the breakthrough experiments in physics (achieving hard X-ray lasing in XFEL pumped atoms, nonlinear Compton scattering), chemistry (obtaining ultrafast molecular dynamics ‘movies’), material sciences (imaging strain dynamically in materials on the nanoscale) and structural biology (dynamic crystallography of biological function) done at the SLAC XFEL, LCLS, during the first five years of operation. LCLS success has spurred a rush worldwide to build XFELs including SACLA in Japan, the European XFEL, the Swiss FEL, PAL in Korea, and others planned or under construction including MaRIE at Los Alamos.

Location: 
Kerckhoff Grand Salon, Kerckhoff Hall