1 / 7

Main Heading

Subheading. Third heading or text. Main Heading. Time Resolved Studies Academic Staff: A. Prof. Peter Hammond * Ph.D. Student: Aaron Alderman (thesis submitted Sept 11) Postdoctoral Researcher: Dr Penny Thorn. Current Personnel. Apparatus & Collaborations

fran
Download Presentation

Main Heading

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Subheading Third heading or text Main Heading Time Resolved Studies Academic Staff: A. Prof. Peter Hammond * Ph.D. Student: Aaron Alderman (thesis submitted Sept 11) Postdoctoral Researcher: Dr Penny Thorn Current Personnel Apparatus & Collaborations UWATime Resolved Emission Detector for photoelectrons Electron/ion low energy storage ring (soon to be operating 2nd prototype) Windsor, Canada: Electron/ion low energy storage ring (operating 1st prototype) Trieste, Italy: Present: ElettraSynchrotron Light Source (operating ~ A$300 million) In the future: FERMI Free Electron Laser (commissioning ~ A$110 million) * peter.hammond@uwa.edu.au

  2. Trieste, Italy:ElettraSynchrotron Light Source (operating) FERMI Free Electron Laser (commisioning)

  3. The Synchrotron: photon pulses from stored electrons Schematic representation Electrons accelerated in magnetic field devices to emit synchrotron radiation Typical pulse separation is 2 ns (i.e. 500 MHz)

  4. From experiments in June 2008 at Sincrotrone Trieste, Italy with 3rd prototype: Time Resolved Emission Detector (TRED) Aim: to measure picosecond scale atomic and molecular processes Electron signal from synchrotron light pulses separated by 2 ns • A new technique invented at UWA • Built in the School of Physics workshop • Ultra-fast timing on picosecond timescale • Precision ~10 picoseconds • Usable for low energy electrons (>1eV) • Nov 2011: 5th prototype at Sincrotrone Trieste

  5. Main Heading Subheading Third heading or text • Stored low energy electrons or ions • - Recycling Spectrometer (RS) r, θ for trajectory in interaction regions Interaction region apertures Hemisphere entrance apertures Hemisphere entrance apertures mm mm mm • Pulsed electron/ion injection • Electron orbit: time ~300 ns • length 0.64m • Stored for ~100 orbits For ions: long path length time of flight mass spectrometer

  6. Key publications Electron Storage: D.R. Tessier, Y. Niu, D. P. Seccombe, T. J. Reddish, A. J. Alderman, B. G. Birdsey, F. H. Read and P. Hammond A Passive Electrostatic Recycling Spectrometer of Desk-Top Size for Charged Particles of Low Kinetic Energy Physical Review Letters (2007) 99, 253201 ( http://prl.aps.org/abstract/PRL/v99/i25/e253201 ) P. Hammond, T.J. Reddish, A.J. Alderman, D.R. Tessier and F.H. Read Stability criteria for a passive electrostatic non-relativistic charged particle storage device New Journal of Physics (2009): 11, 043033 ( http://www.iop.org/EJ/abstract/1367-2630/11/4/043033) Fast timing of photons: JG Lambourne, F Penent, P Lablanquie, RI Hall, M Ahmad. M Zitnik, K Bucar, MK Odling-Smee, JR Harries, P Hammond, DK Waterhouse, S Stranges, R Richter, M Alagia, M Coreno and M Ferianis Experimental Determination of the Lifetime for the 2p3d(1Po) Helium Doubly Excited State Physical Review Letters(2003) 90, 153004 ( http://prl.aps.org/abstract/PRL/v90/i15/e153004 ) JR Harries, JP Sullivan, S Obara, Y Azuma, JG Lambourne, F Penent, RI Hall, P Lablanquie, K Bucar, M Zitnik and P Hammond Partial photoionisation of helium into the 2s2S and 2p2P ion states in the 3lnl’ doubly-excited states region J. Phys. B: At. Mol. Opt. Phys. (2005) 38, L153–L160 ( http://iopscience.iop.org/0953-4075/38/10/L04 ) Fast timing of electrons with TRED: IPR too secret to publish yet!

  7. Opportunities? In all areas of the research into the TRED and the RS: Ultra-fast timing experimental measurements Commissioning of UWA RS prototype Combination of TRED concept with RS spectrometer to form an ultra-high resolving power time-of-flight mass spectrometer (~400000) Data analysis & interpretation of data from the RS prototypes Computational modeling of RS and TRED apparatus (trajectory integration in 3D) Further apparatus design, development and exploration For further information contact me - peter.hammond@uwa.edu.au

More Related