Ultra-short efficient laser-driven hard X-ray source operated at a kHz repetition rate

Ultra-short bursts of hard X-ray radiation are generated by interaction of high-contrast femtosecond laser pulses with a jet of liquid Ga. The X-ray emission shows a strong dependence on the angle of incidence and polarization of the laser beam, consistent with the processes of resonant absorption and vacuum heating. As much as 60% of the total X-ray emission consists of [Ga]Kα radiation (9.22–9.25 keV) with a photon flux of 6×109 photons/(s srad). Using this novel X-ray source, static diffraction patterns from a GaAs(111) crystal were recorded with an acquisition time of 2 s.

[1]  Wei Li,et al.  High-average-power 2-kHz laser for generation of ultrashort x-ray pulses. , 2002, Optics letters.

[2]  Forster,et al.  Yield optimization and time structure of femtosecond laser plasma kalpha sources , 2000, Physical review letters.

[3]  Patrick Audebert,et al.  Femtosecond time-resolved X-ray diffraction from laser-heated organic films , 1997, Nature.

[4]  Thomas Feurer,et al.  An incoherent sub-picosecond X-ray source for time-resolved X-ray-diffraction experiments , 2001 .

[5]  Jean-Claude Kieffer,et al.  Hard x-ray emission in high intensity femtosecond laser–target interaction , 1999 .

[6]  C. Reich,et al.  Theory of K(alpha) generation by femtosecond laser-produced hot electrons in thin foils. , 2002, Physical review. E, Statistical, nonlinear, and soft matter physics.

[7]  Price,et al.  Electron Temperature Measurements of Solid Density Plasmas Produced by Intense Ultrashort Laser Pulses. , 1996, Physical review letters.

[8]  E. Fill,et al.  Spatial characteristics of Kα radiation from weakly relativistic laser plasmas , 2000 .

[9]  Antoine Rousse,et al.  Experimental study of the interaction of subpicosecond laser pulses with solid targets of varying initial scale lengths , 1997 .

[10]  Campbell,et al.  Measurement of the expansion of picosecond laser-produced plasmas using resonance absorption profile spectroscopy. , 1989, Physical review letters.

[11]  Thomas Elsaesser,et al.  Ultrashort 1-kHz laser plasma hard x-ray source. , 2002, Optics letters.

[12]  Bell,et al.  Collisionless absorption in sharp-edged plasmas. , 1992, Physical review letters.

[13]  A. Cavalleri,et al.  Picosecond–milliångström lattice dynamics measured by ultrafast X-ray diffraction , 1999, Nature.

[14]  H Schwoerer,et al.  Optimization of Kalpha bursts for photon energies between 1.7 and 7 keV produced by femtosecond-laser-produced plasmas of different scale length. , 2002, Physical review. E, Statistical, nonlinear, and soft matter physics.

[15]  Kent R. Wilson,et al.  Ultrafast x‐ray absorption probing of a chemical reaction , 1996 .

[16]  S. Fourmaux,et al.  Non-thermal melting in semiconductors measured at femtosecond resolution , 2001, Nature.

[17]  Teubner,et al.  Angle-dependent x-ray emission and resonance absorption in a laser-produced plasma generated by a high intensity ultrashort pulse. , 1993, Physical review letters.

[18]  Hezhou Wang,et al.  Narrow frequency and sharp angular defect mode in one-dimensional photonic crystals from a photonic heterostructure. , 2004, Optics letters.

[19]  T. Witting,et al.  Efficient high-repetition-rate fs-laser based X-ray source , 2004 .

[20]  Gauthier,et al.  Efficient K alpha x-ray source from femtosecond laser-produced plasmas. , 1994, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[21]  Paul Gibbon,et al.  Short-pulse laser - plasma interactions , 1996 .

[22]  Glover,et al.  Generation of femtosecond pulses of synchrotron radiation , 2000, Science.

[23]  Heinrich Schwoerer,et al.  Kα-radiation from relativistic laser-produced plasmas , 2002 .

[24]  Chaker,et al.  Short-pulse laser absorption in very steep plasma density gradients. , 1989, Physical review letters.

[25]  S. C. Prasad,et al.  Laser-based microfocused x-ray source for mammography: feasibility study. , 1997, Medical physics.

[26]  G. Korn,et al.  Regenerative amplification of femtosecond laser pulses in Ti:sapphire at multikilohertz repetition rates. , 2004, Optics letters.

[27]  H Schwoerer,et al.  Spatial characteristics of Kalpha x-ray emission from relativistic femtosecond laser plasmas. , 2003, Physical review. E, Statistical, nonlinear, and soft matter physics.