Development of novel X-ray sources has a significant impact on the society due to its applications on very different fields such as medicine, biology, chemistry, industry. Laser-plasma X-ray sources provides a new route to high brightness and small source size somewhere in the middle of low cost microfocus X-rays and large-scale synchrotron facilities. We explore one application of this new type of sources with emphasis on the stability of the source at high repetition rate and the advantage over similar conventional sources.
The laser-plasma X-ray source, currently installed at the Laser Laboratory for Acceleration and Applications (L2A2) of the University of Santiago de Compostela (USC), is produced by 1mJ, 35 fs, 1kHz pulses centered at 800 nm wavelength on thick metallic targets. The X-ray spectra of this source are characterized by the K peaks of the target material and a Bremsstrahlung continuum up to several tens of keV. The L2A2 x-ray source has been optimized and stabilized for operation in air conditions and for imaging applications. The stability of the source is achieved by optimizing the positioning system of the metallic target which refresh and keep the surface within the 8 μm of the Rayleigh length.
The micrometric size of the source enables higher imaging resolutions and, makes this source suitable for phase contrast imaging. The high-resolution imaging system is composed by the laser-plasma X-ray source and a large area CMOS sensor with a plastic scintillator (RadEye 2). We present some imaging applications like high resolution absorption imaging, phase contrast imaging and 3D tomographic reconstruction of biological and non-biological samples.
|Working group||Secondary radiation generation & applications|