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Rutherford Appleton Laboratory Laser Acceleration -the VULCAN PW laser Peter Norreys Central Laser Facility Plasma physics group, Imperial College, London.

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Presentation on theme: "Rutherford Appleton Laboratory Laser Acceleration -the VULCAN PW laser Peter Norreys Central Laser Facility Plasma physics group, Imperial College, London."— Presentation transcript:

1 Rutherford Appleton Laboratory Laser Acceleration -the VULCAN PW laser Peter Norreys Central Laser Facility Plasma physics group, Imperial College, London Staff of the Central Laser Facility

2 Rutherford Appleton Laboratory Outline Brief description of the VULCAN PW Facility Why it is useful for accelerator studies Acceleration of protons and heavy ions Future prospects for laser accelerators Ideas for future ExoWatt laser systems Summary

3 1991: High power project start 1993: 1st results with fibre stretcher 1995: Vacuum compressor installed 1998: Larger gratings 2000: Spare gratings available 2002: PW upgrade on line Vulcan high power beam output Rutherford Appleton Laboratory

4 Vulcan Laser System 8 Beam Nd:glass laser 3 kJ long pulse 100 TW, W.cm -2 CPA 2 separate target areas Rutherford Appleton Laboratory

5 PetaWatt Upgrade - Stage 1 In March 1999, funding was awarded for the upgrade of the 100 TW CPA beamline to 1PW as the first stage of a major enhancement programme. This was made possible in part through the availability of certain components following the closure of the Nova system in the US Some additional components were also made available from the Phebus system in France

6 Rutherford Appleton Laboratory Maximising Intensity Focal Intensity Energy Focal Spot Size Pulse width Focal Spot Size F - Number Wavelength Beam Quality The focal intensity can be maximised using a combination of increasing the energy, reducing the focal spot size and reducing the pulse width.

7 Rutherford Appleton Laboratory The energy increase is provided by the installation of additional 208 mm amplifier from the NOVA system The pumping configuration is being modified to incorporate eight large bore flashlamps developed by the CLF Gain tests last year with the modified design demonstrate a small signal gain >2.2 Energy Increase

8 Rutherford Appleton Laboratory Energy = Pulsed Power A large amount of pulsed power also came from Nova to drive these amplifiers We have taken the opportunity to also upgrade and replace the entire Vulcan pulsed power system Vulcan was closed for 3 months in 2001 for this to happen No other shutdown for PW installation

9 Rutherford Appleton Laboratory Reducing Pulse Length Input bandwidth16 nm Which would support ….100 fs We must double Vulcan Bandwidth Output bandwidth2 nm Which supports …~ 800 fs

10 Rutherford Appleton Laboratory Non linear medium Optical Parametric Chirped Pulse Amplification (OPCPA) … in the Front End Bandwidth Increase pump signal idler signal Conservation of Energy p = s + i Phase-Matching Condition n p p = n s s + n i i


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