Jakob Andreasson. Time resolved and vacuum ellipsometry work shop welcome and introduction

Transcription

1 Time resolved and vacuum ellipsometry work shop welcome and introduction Jakob Andreasson - Research program leader: ELI Beamlines Facility, Czech Republic - Researcher: Laboratory of Molecular Biophysics, Uppsala University - Guest Researcher: Dept. of Physics, Chalmers University of Technology ELI Beamlines Dolni Brezany 11/

2 ~300 co workers 6 scientific teams 4 lasers 5 experimental halls ELI Beamlines facility Dolni Brezany, 20 minutes outside of Prague

3 ELI: Extreme Light Infrastructure ELI is a European Project forming a pan-european Laser facility to realize a new generation of lasers for fundamental and applied research. -As a user facility. Realized as 3 independent pillars -ELI Beamlines: Czech Rep. Secondary X-ray and particle sources -ELI ALPS: Hungary. Attosecond pulses -ELI NP: Romania. Nuclear Physics Will merge into pan-european research infrastructure and users facility after completion. Transfer from national construction projects into a European research facility managed by the ELI DC (Brussels) User and user access policies under development -Non proprietary user access (main expected mode of operation) -Proprietary access -In house research Start of operations: 2017 User operations: 2018

4 ELI Beamlines: Research programs and lasers ELI Beamlines Chief Scientist: Georg Korn Research Topic Leader Program 1 Lasers Bedrich Rus 2 X-ray Sources Driven by Ultrashort Laser Pulses Jaroslav Nejdl 3 Particle Acceleration by Lasers Daniele Margarone 4 Applications in Molecular, Biomedical, Material Sciences 5,6 Plasma and High Energy Density Physics and Exotic Physics and Theory/simulations Jakob Andreasson Stefan Weber + 2 Excellent Research Teams (ERTs): ELIBIO (Janos Hajdu) and HIFI (Sergei Bulanov) Laser L1 L3 (and L2) Description/parameters In house development Target: 100 mj, 1 khz, < 20 fs Ramp up: 30 mj, 16 fs, 2 nd half of 2018 Aim: 100 mj PW class lasers: 10 Hz, <30 fs, 30 J L1: Based on amplification of picosecond pulses in broadband OPCPA and compressed to <20 femtosecond using chirped mirrors. The pump lasers are based on Yb:YAG thin disk technology. L4 >1 kj (10 PW), several different modes of operation (compression, shaping)

5 Scientific programs for early experiments in RP4 1: Atomic, Molecular and Optical (AMO) Science and Coherent Diffractive Imaging (CDI) 2: Soft X ray Materials Science and time resolved magneto optical ellipsometry 3: Hard X ray science, diffraction, spectroscopy, imaging and pulse radiolysis 4: Optical Spectroscopy, Molecular Dynamics and + pump beams Photon science experiments in the THz to Hard X ray range femtosecond to micro, or even millisecond dynamics

6 RP4: Applications in Molecular, Bio medical and Materials Science and ELIBIO research team Jakob Andreasson: Team leader Maria Krikunova: AMO science (also ELIBIO and TU Berlin) Eva Klimesova: AMO science Olena Kulyk: AMO science Laura Dittrich: AMO science Krishna Khalkurel: Coherent Diffractive Imaging (ELIBIO) Borislav Angelov: X-ray scattering and diffraction (also ELIBIO) Vitaly Polivinkin: X-ray scattering and diffraction (ELIBIO) Martin Precek: Pulse radiolysis Shirly J. Espinoza: Soft X-ray material science (also ELIBIO) Christopher D. Brooks: Soft X-ray material science Miroslav Kloz: Optical spectroscopy and pump beams (also ELIBIO) Mateusz Rebarz: Optical spectroscopy and pump beams Alessandra Picchiotti: Optical spectroscopy and pump beams Rachael Jack: ELIBIO Biolab manager (also ELIBIO) Scientific coordinator of RA 2-6 Georg Korn Beamline integration support team Tomas Lastovicka (team leader) Openings: Senior and junior researcher (postdoc) positions Alumni Petr Bruza (Dartmouth, US) Stefan Michalik (Daimond, UK)

7 Implementation of particle and photon beamlines E2: Betatron/ Compton E1: HHG + PXS E3: HEDP L4 compressor room E4: ion aceleration E6: Not yet utilized E5: electron acceleration, wake field acceleration LUX/FEL HELL beamline

8 E1 layout, beam distribution, X-ray sources and experimental stations Up to 4 beams from the L1 laser (+ multi purpose fs-lasers) allows complex time-resolved experiments 5 experimental stations: -Two VUV/Soft X-ray end stations for AMO and CDI (1) and VUV magneto optical ellipsometry (2) -Two modular beamlines for hard X-ray science: Scattering, diffraction, spectroscopy, imaging and radiolysis (3 and 4) - Station for Optical probes; Stimulated Raman Scattering (5), + Pump beams E1 3D rendering , 4

9 E1 light sources and end stations Higher Harmonics Generation Vacuum ellipsometer 2 1 AMO and imaging station 5 Optical spectroscopy station with tr ellipsometry Plasma X ray source 3, 4 X ray diffraction and spectroscopy

10 Time resolved magneto-optical ellipsometry in the NIR to VUV spectral range -Two tracks towards time resolved VUV ellipsometry 1) ELIps instrument: Vacuum ellipsometry in the NIR to VUV range Designed and built by: 4DOS and Walnut consulting Hamburg UHV operation, <10-7 mbar Continuously variable angle of incidence Variable sample temperature from 30K to 450K Switchable magnetic field (1 khz) at the sample up to 1,5T Can be used with a variety of CW and pulsed light sources (including HHG) Initial commissioning in the NIR to DUV range (laser driven CW light source) Extension into the VUV with exchange of polarizer/analyzer and optics Open source software under development by supplier: Improved handling of error bars in data taking Further information and first experimental results in the IR to UV range in the presentation from Michael Rubhausen Thursday at to 10.30

11 Time resolved magneto-optical ellipsometry in the NIR to VUV spectral range -Two tracks towards time resolved VUV ellipsometry 2) Time resolved pump probe spectroscopic ellipsometry Set up developed and used in a close collaboration with Leipzig University More information and initial results in the presentations from: O. Herrfurth, Leipzig University, Wed S. Richter, Leipzig University, Wed S. Espinoza, ELI Beamlines, Wed and M. Rebarz, ELI Beamlines, Wed Initial set up: Laser: Coherent Astrella: 1 khz, 6 mj, 35 fs Pump beam: 1 st, 2 nd and 3 rd harmonic. Now extended with the use of OPAs (190 to 2600 nm) Probe beam: White light (vis to UV) generated in CaF and sapphire Polarizer: Wire grid polarizer (minimizes pulse elongation) Two chopper set up: Allows pump only, probe only, dark (no pump or probe) and pump-probe measurements

12 Optical spectroscopy station, Commissioned in summer Transient absorption (vis-uv) -Transient IR -Stimulated Raman Scattering -2D IR -2D vis and UV -Time resolved spectroscopic ellipsometry

13 Pump beams to initiate dynamics High power VIS + near UV/IR VIS + UV + IR MID IR THz source (ZnTe, GaSe) Ultrashort shaped spectrally narrowed

14 AMO and CDI science MAC end station, Multi purpose end station for AMO (Atomic, Molecular and Optical) science and CDI (Coherent Diffractive Imaging). Early experiment: THz photoelectron streaking electron Time of Flight measurements Aim: Determine the time scale of photo emission from molecules, clusters and aerosol (including bio) particles

15 trrex station PXS: Research Instruments Corporation (USA) Diffractometer: STOE (Germany) Auxiliary Cu source: AXO Dresden (Germany) Montel optics: AXO Dresden (Germany) Polycapillary optics: XOS (USA) Main detector: DECTRIS (Swizerland) Slits/pinholes: JJ Xray (Denmark) Curved crystal gratings: JS Spectro (Poland) Cryostat: ARS (USA) Cryostream: Oxford instruments (UK) PXS

16 Development since last years meeting: One year ago Participants at the 2016 ellipsometry WS admiring the transient absorption set up in the first temporary HiLASE lab E1: Unstable floor and water from the ceiling..

17 Development since last years meeting: Today Light sources commissioned or under commissioning. Experimental stations operational, under commissioning, build up or in delivery. Manuscripts based on in-house data under preparation E1: Floors stabilized (resin injection and anchoring), pre-cleaned. Installations in progress -Presently cable trays and first vacuum vessels -Followed by central vacuum, beam transport and light sources -Experimental stations in early 2018

18 Thank you for your attention Welcome