Kansas State Light Source

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Kansas State Light Source
The dream laser for AMO studies
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The Optical Prospect of Laser-matter Interaction
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High power, or high repetition rate?

• High power laser ( 1015 W )
• Ultrahigh intensity 1021 W/cm2
• Relativistic plasma physics (hot, but not our
  expertise)
• High cost
• Single shot

• High repetition rate laser (1012 W)
• High intensity 1015-18 W/cm2
• Nonperturbative atomic physics (also hot, our
  expertise)
• High stability (1 RMS) and high repetition rate
• Fast accumulation of weak signal (TOF, COTRIMS)
• Fast feedback control (coherent control)

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Nominal parameters of KSLS
I 2x1015 W/cm2

• Focal spot size 100 µm
• Pulse duration 20 fs
• Pulse energy 6 mJ
• Repetition rate 1 KHz

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Kansas State Light Source
Development Plan

• The 1st phase 11/30/01, 3 mJ, 20fs
• The 2nd Phase 01/31/01, 6 mJ, 20fs
• The 3rd Phase 03/31/02, 3 mJ, 7fs

12/31/01
12/31/02
12/31/00
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Kansas State Light Source
Pump Laser
Faraday
Pockels Cell
Isolator
Oscillator
Stretcher
Isolator
Amplifier
Compressor
Pump Laser
Pump Laser
6 mJ, 20 fs, 1 kHz
Beam Expander
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Achievable Intensity with KSLS
I 2x1019 W/cm2

• Focal spot size 1 µm
• Pulse duration 20 fs
• Pulse energy 6 mJ
• Repetition rate 1 KHz

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Experiments using
Kansas State Light Source

• Ionization
• Barrier suppression (above-barrier, Barrier
  suppression)
• Molecules
• Non-sequential

• High Harmonic Generation
• Attosecond pulse
• keV x-ray
• Phase-matching

• Ionlaser-atom interaction

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High Harmonic Generation
-The experiment done with Ultrafast Photon
Source, the brother of
Kansas State Light Source
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HHG Experimental Set-up
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Extending the Cut-off

• Using long wavelength pulse lasers

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High Harmonic Generation with OPA
MCP Phosphor
TiS Laser 1.2mJ, 25fs
Gas nozzle
CCD
OPA 1.1 1.6?m 30 100?J 25 fs
Filter
FL88.3mm
I3x1014 W/cm2
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Tunability of X-ray Wavelength
0.8 ?m
1.51 ?m
order 37
1.37 ?m
order 37
1.22 ?m
order 37
30 40 50
60 70 80
90 Photon Energy
(eV)
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Extension of Harmonic Cutoff
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Prediction Ultrafast KeV X-ray Generation
Z. Chang PRL, 1997