Emission of electrons from a metal needle when irradiated with an IR femtosecond laser at a wave length of $1240$ nm

The photoemission of electrons from a metal needle under the action of radiation from a femtosecond IR laser with a wavelength of $1240$ nm is studied. Diagnostics of electron bunches using the Faraday cup and the time-of-flight method show the possibility of obtaining electron pulses with a charge of $40$ pC at a laser pulse energy of $45~\mu$J. The dependence of the electron pulse charge, which is proportional to the sixth power of the laser pulse energy, indicates a multiphoton mechanism of electron emission.