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Atomic and Laser Physics
Credit: Jack Hobhouse

Prof Peter Norreys FInstP;

Professorial Research Fellow

Research theme

  • Accelerator physics
  • Lasers and high energy density science
  • Fundamental particles and interactions
  • Plasma physics

Sub department

  • Atomic and Laser Physics

Research groups

  • Oxford Centre for High Energy Density Science (OxCHEDS)
peter.norreys@physics.ox.ac.uk
Telephone: 01865 (2)72220
Clarendon Laboratory, room 141.1
Peter Norreys' research group
  • About
  • Research
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  • Publications

Monoenergetic beams of relativistic electrons from intense laser-plasma interactions

Nature 431:7008 (2004) 535-538

Authors:

SPD Mangles, CD Murphy, Z Najmudin, AGR Thomas, JL Collier, AE Dangor, EJ Divall, PS Foster, JG Gallacher, CJ Hooker, DA Jaroszynski, AJ Langley, WB Mori, PA Norreys, FS Tsung, R Viskup, BR Walton, K Krushelnick

Abstract:

High-power lasers that fit into a university-scale laboratory can now reach focused intensities of more than 10 19 W cm -2 at high repetition rates. Such lasers are capable of producing beams of energetic electrons, protons and γ-rays. Relativistic electrons are generated through the breaking of large-amplitude relativistic plasma waves created in the wake of the laser pulse as it propagates through a plasma, or through a direct interaction between the laser field and the electrons in the plasma. However, the electron beams produced from previous laser-plasma experiments have a large energy spread, limiting their use for potential applications. Here we report high-resolution energy measurements of the electron beams produced from intense laser-plasma interactions, showing that-under particular plasma conditions-it is possible to generate beams of relativistic electrons with low divergence and a small energy spread (less than three per cent). The monoenergetic features were observed in the electron energy spectrum for plasma densities just above a threshold required for breaking of the plasma wave. These features were observed consistently in the electron spectrum, although the energy of the beam was observed to vary from shot to shot. If the issue of energy reproducibility can be addressed, it should be possible to generate ultrashort monoenergetic electron bunches of tunable energy, holding great promise for the future development of 'table-top' particle accelerators.
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Characterization of proton and heavier ion acceleration in ultrahigh-intensity laser interactions with heated target foils

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 70:3 2 (2004)

Authors:

P McKenna, KWD Ledingham, JM Yang, L Robson, T McCanny, S Shimizu, RJ Clarke, D Neely, K Spohr, R Chapman, RP Singhal, K Krushelnick, MS Wei, PA Norreys

Abstract:

The investigation of proton and heavy ion acceleration was carried out in ultrahigh intensity laser plasma interactions using VULCAN lasers. The first spatially integrated measurement of proton and heavy ion acceleration was performed with nuclear activation techniques. High-intensity laser-plasma interactions provide a unique and potentially important source of nuclear radiation for radioisotope production. By controlling the target conditions and the accelerated ion beam properties, the production of radioisotopes can be controlled effectively.
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14aQA-3 コーンシリンダー爆縮と超高強度レーザーによる長尺高密度プラズマ加熱(プラズマ基礎・科学 : レーザー応用, 基礎実験, 領域 2)

(2004) 169

Authors:

中村 浩隆, 兒玉 了祐, 松岡 健之, 薮内 俊毅, 犬伏 雄一, P Norreys, 白神 宏之, 近藤 公伯, 田中 和夫, 井澤 靖和, GODグループ, MTグループ, Tグループ
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High power laser production of short-lived isotopes for positron emission tomography

Journal of Physics D: Applied Physics 37:16 (2004) 2341-2345

Authors:

KWD Ledingham, P McKenna, T McCanny, S Shimizu, JM Yang, L Robson, J Zweit, JM Gillies, J Bailey, GN Chimon, RJ Clarke, D Neely, PA Norreys, JL Collier, RP Singhal, MS Wei, SPD Mangles, P Nilson, K Krushelnick, M Zepf

Abstract:

Positron emission tomography (PET) is a powerful diagnostic/imaging technique requiring the production of the short-lived positron emitting isotopes 11C, 13N, 15O and 18F by proton irradiation of natural/enriched targets using cyclotrons. The development of PET has been hampered due to the size and shielding requirements of nuclear installations. Recent results show that when an intense laser beam interacts with solid targets, megaelectronvolt (MeV) protons capable of producing PET isotopes are generated. This report describes how to generate intense PET sources of 11C and 18F using a petawatt laser beam. The work describing the laser production of 18F through a (p,n) 18O reaction, and the subsequent synthesis of 2-[18F] is reported for the first time. The potential for developing compact laser technology for this purpose is discussed.
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Laboratory measurements of 0.7 GG magnetic fields generated during high-intensity laser interactions with dense plasmas

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 70:2 2 (2004)

Authors:

U Wagner, M Tatarakis, A Gopal, FN Bee, EL Clark, AE Dangor, RG Evans, MG Haines, SPD Mangles, PA Norreys, MS Wei, M Zepf, K Krushelnick

Abstract:

Measurements of ultrahigh magnetic fields produced during intense laser interaction with solids were presented. Polarization measurements of high-order laser harmonics suggest the existence of magnetic field strengths of 0.7±0.1 GG. It was found that denser regions of the plasma can be probed using higher order harmonics. The technique was found to be useful for the measurements of multi-GG level magnetic fields.
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