Towards high photon density for Compton scattering by spectral chirp

Scattering of intense laser pulses on high-energy electron beams allows one to produce a large number of x and gamma rays. For temporally pulsed lasers, the resulting spectra are broadband which severely limits practical applications. One could use linearly chirped laser pulses to compensate for that broadening. We show for laser pulses chirped in the spectral domain that there is the optimal chirp parameter at which the spectra have the brightest peak. Additionally, we use catastrophe theory to analytically find this optimal chirp value.