kHz femtosecond laser-plasma hard X-ray and fast ion source

Details kHz femtosecond laser-plasma hard X-ray and fast ion source kHz femtosecond laser-plasma hard X-ray and fast ion source

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..611..353t&link_type=abstract

SUPERSTRONG FIELDS IN PLASMAS: Second International Conference on Superstrong Fields in Plasmas, Second International Conference

Physics

2

Hard X-Ray Sources, X-Ray, Gamma-Ray, And Particle Generation, Ultrafast Processes, Optical Pulse Generation And Pulse Compression

Scientific paper

We describe the first demonstration of a new stable, kHz femtosecond laser-plasma source of hard x-ray continuum and Kα emission using a thin liquid metallic jet target. kHz femtosecond x-ray sources will find many applications in time-resolved x-ray diffraction and microscopy studies. As high intensity lasers become more compact and operate at increasingly high repetition-rates, they require a target configuration that is both repeatable from shot-to-shot and is debris-free. We have solved this requirement with the use of a fine (10-30 μm diameter) liquid metal jet target that provides a pristine, unperturbed filament surface at rates >100 kHz. A number of liquid metal targets are considered. We will show hard x-ray spectra recorded from liquid Ga targets that show the generation of the 9.3 keV and 10.3 keV, Kα and Kβ lines superimposed on a multi-keV Bremsstrahlung continuum. This source was generated by a 50fs duration, 1 kHz, 2W, high intensity Ti:Sapphire laser. We will discuss the extension of this source to higher powers and higher repetition rates, providing harder x-ray emission, with the incorporation of pulse-shaping and other techniques to enhance the x-ray conversion efficiency. Using the same liquid target technology, we have also demonstrated the generation of forward-going sub-MeV protons from a 10 μm liquid water target at 1 kHz repetition rates. kHz sources of high energy ions will find many applications in time-resolved particle interaction studies, as well as lead to the efficient generation of short-lived isotopes for use in nuclear medicine and other applications. The protons were detected with CR-39 track detectors both in the forward and backward directions up to energies of ~500 keV. As the intensity of compact high repetition-rate lasers sources increase, we can expect improvements in the energy, conversion efficiency and directionality to occur. The impact of these developments on a number of fields will be discussed. As compact, high repetition-rate femtosecond laser technology reaches towards focused intensities ~1019 W/cm2, many new applications of high repetition rate hard x-ray and MeV ion sources will become practical. .

Affiliated with

Also associated with

No associations

Rating

kHz femtosecond laser-plasma hard X-ray and fast ion source does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with kHz femtosecond laser-plasma hard X-ray and fast ion source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and kHz femtosecond laser-plasma hard X-ray and fast ion source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1533893