Patent ID: 8633438

Claim:
An ultrafast electron diffraction device for irradiating a sample with a bunch of electrons in an ultrashort time pulse in order to perform an ultrafast analysis of the sample, comprising: a) a laser emitter for delivering an ultrashort pulse laser having a pulse width of not more than 1 ps onto a target which is a material for generating electrons at an intensity of not less than 10 17 W/cm 2 ; and b) a pulse compressor for rotating, in a magnetostatic field, a bunch of electrons generated from the target onto which the ultrashort pulse laser has been delivered so as to suppress a spread of the bunch of electrons in their travelling direction, wherein the pulse compressor comprises an entrance-side parallel-plate static magnet and an exit-side parallel plate static magnet which is tilted vertically to the entrance-side parallel plate static magnet.