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Costello/Kennedy/Mosnier/van Kampen National Centre for Plasma Science & Technology (NCPST) and School of Physical S

CLPR Research in Laser Plasmas. Costello/Kennedy/Mosnier/van Kampen National Centre for Plasma Science & Technology (NCPST) and School of Physical Sciences, Dublin City University. Outline. The ‘Centre for Laser Plasma Research’ (CLPR)-NCPST- Who are we & what do we do ?

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Costello/Kennedy/Mosnier/van Kampen National Centre for Plasma Science & Technology (NCPST) and School of Physical S

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  1. CLPRResearch in Laser Plasmas Costello/Kennedy/Mosnier/van Kampen National Centre for Plasma Science & Technology (NCPST) and School of Physical Sciences, Dublin City University

  2. Outline • The ‘Centre for Laser Plasma Research’ (CLPR)-NCPST-Who are we & what do we do ? • Table Top’ Laser Generated Plasma Basics • Projects

  3. NCPST/CLPRWho are we ? What do we do ?

  4. NCPST/ CLPR - Who are we ? • NCPST established with Irish Government funding (Euro 8M) in 1999. Now EU Training Site. • Consortium of new and existing laboratories in plasma physics, chemistry and engineering • Fundamental and Applied Scientific Goals • CLPR node is divided into 4(6) laboratories focussed on PLD and photoabsorption spectroscopy/ imaging (especially in UV - X-ray)

  5. The CLPR node comprises 6 laboratory areas focussed on pulsed laser matter interactions (spectroscopy/ imaging) Academic Staff (4):John T. Costello, Eugene T. Kennedy, Jean-Paul Mosnier and Paul van Kampen Post Doctoral Fesearchers (5): Dr. Deirdre Kilbane (PVK/JC) Dr. Hugo de Luna (JC) Dr. Jean-Rene Duclere (JPM) Dr. Pat Yeates (ETK) Dr. Mark Stapleton (JC) PhD students (8): Caroline Banahan (PVK/JC)Kevin Kavanagh (JC) Adrian Murphy (JC) John Dardis (JC) Jonathan Mullen (PVK) Rick O'Hare (JPM) Eoin O’Leary (ETK) Rebecca Treacy (PVK) Visiting PhD student (2):Michael Novotny (JPM) and Philip Orr (JC) Funded by: SFI - Frontiers and Investigator HEA - PRTLI and North-South IRCSET - Embark& BRGS Enterprise Ireland - BRGS EU - Marie Curie and RTD

  6. Research Theme Probing matter with fast and ultrafast UV, extreme-UV and X-ray pulses (Imaging/Spectroscopy in the UV - Soft X-Ray) Figure from lectures notes of David Attwood, U Calif.-Berkeley

  7. NCPST/ CLPR - What do we do ? DCU Pico/Nanosecond Laser Plasma Light Sources VUV, XUV & X-rayAtomic Absorption Spectroscopy VUV Photoabsorpion Imaging VUV LIPS for Analytical Purposes Pulsed Laser Deposition (PLD)/ICCD Imaging and Spectroscopy of PLD Plumes Aarhus/Berkeley Synchrotrons Photoion and Photoelectron Spectroscopy Hamburg - FEL Femtosecond IR+XUV Facility Development

  8. Part I - Table Top Laser-Plasma Basics

  9. Plasma & The 4 Phases of Matter Greek Philosophers Physicists Earth Solid Water Liquid Wind Gas FirePlasma Plasma: Fluid (gas) of electrons and ions

  10. How do you make a laser plasma ? Vacuum or Background Gas Target Plasma Assisted Chemistry Laser Pulse- 1 J/ 10 ns Lens Spot Size = 100 mm (typ. Diam.) F > 1011 W.cm-2 Te = 100 eV (~106 K) Ne = 1021 cm-3 Vexpansion 106 cm.s-1 Emitted - Atoms, Ions, Electrons, Clusters, IR - X-ray Radiation

  11. Intense Laser Plasma Interaction S Elizer, “The Interaction of High Power Lasers with Plasmas”, IOP Series in Plasma Physics (2002)

  12. In summary we know that:Laser Produced Fireballs are-Hot: Te = 105 - 108 KelvinDense: ne= 1021 e/cm3Transient: ps - msRapid: 106 - 107 cm/secDublin to Cork in 3 seconds !!!

  13. Laser - Astrophysical Plasmas - Solar Interior So now we know that laser plasmas are hot & dense ! We can tune temperature, density etc. so that they produce spectra to be compared with spectra from other laboratory and astrophysical sources !! Figure - David Attwood, U C Berkeley

  14. Laser Plasmas as VUV to X-ray Sources Since a laser plasma is HOT - (Te= 10 - 1000 eV) and (say) you consider it to be a black (or grey) body, then most emission should be at photon energies also in the 10 - 1000 eV range, i.e.,at Vacuum Ultraviolet (VUV),Extreme-Ultraviolet (EUV)and Soft X-ray (SXR) wavelengths !! Figure from lectures notes of David Attwood, U Calif.-Berkeley

  15. Generally Extreme-UV Science & Technology is Growing Rapidly Industry: Lithography Bio-Medical: Microscopy Basic Research: Astronomy

  16. Our Themes Laser Plasma Light Sources (dev & appls) Instrumentation and techniques Imaging and Spectroscopy in the UV, VUV, EUV and X-ray regions Physics of 1. 'Colliding Plasma Systems' 2. Structure and dynamics of atoms and ions

  17. DUAL LASER PLASMA (DLP) EXPERIMENTS UV - Xray Source Absorbing Sample

  18. Dual Laser Plasma (DLP) Photoabsorption J T Costello et al., Phys.Scr. T34, 77 (1991), E T Kennedy et al., Opt.Eng 33, 3984 (1994) No tuning required No vapour required Flexible Neutral/Multiplycharged/ Refractory Elements Dx, DT, I(W/cm2)  Species choice Backlighting Plasma Io Both Plasmas I = Ioe-snL Backlighter Relative Absorption Cross Section sNL =Ln(Io/I)

  19. TOF Oven Synchrotron - Photoion Results- BW3 Undulator XUV Radiation Li Vapour

  20. Photoionization as a plasma diagnostic VUV Photoabsorption Imaging VUV CCD Sample Io(x,y,t) I(x,y,t) Pass a collimated VUV beam through the plasma sample and measure the spatial distribution of the absorption. J Hirsch et al., J.Appl.Phys 88, 4953 (2000), Rev.Sci.Instrum (in press 2003)

  21. ULtrafast Emission and Absorption Photography Laser Beam Wedge Lens Target I-CCD Andor - Belfast <2 ns shutter time

  22. Colliding Plasmas Generate a Secondary Plasma !

  23. ‘Colliding Stars Model System' - 'Colliding Plasmas' Is that what's happening here ? NGC 2346

  24. Some Other Current Projects • Photoionization of ions with DLP setup in DCU, e.g. Mn2+, JPB Vol 38, L1 (2005) accessed > 500 times in <50 days! • First two-colourDLP (LP Continuum + Panther OPA) photoabsorption expts on ions - tests for FEL+OPA ? • Negative ion beams in intense 800 nm fields (QUB/MPI/ DCU) Phys. Rev. Lett 93, Art. No. 223001 (2004) • Photoionization of ions in merged synchrotron-ion beam experiments (Aarhus - Orsay/DCU/John West) • 'Clean'/ UHV laser plasma (dilute) ion source under development at DCU - possible source for synchrotron/ FEL expts ? • Laser plasma X-ray spectroscopy now available at DCU - Experience at 6 - 15 Angstrom (XFEL expt'l tests ?)

  25. Conclusions Lots happening and projects in: • UV - X-ray Sources - Lasers, Laser plasmas, Synchrotron & FEL - JC/ETK • Plasma probing with UV to X-ray radiation - spectroscopy & imaging - JC/ETK/PVK • Pulsed Laser Deposition & Diagnostics (with SSL) - JPM/EMG/MOH Lots of Int'l collaborations and opportunities to travel Come and talk with us if you are interested in lasers, plasmas, optics and atomic physics

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