Device and method for measuring in-situ time-resolved x-ray absorption spectrum

A device for measuring in-situ time-resolved X-ray absorption spectrum, comprising:

• an X-ray source (1),
• a first slit (2),
• an acousto-optic tunable X-ray filter (9),
• a radio frequency transmitter (10) having an input and sending out an excitation signal,
• a second slit (4),
• a front ionization chamber (5) having an output signal,
• a front ionization chamber signal amplifier (11),
• a sample to be tested (6),
• a rear ionization chamber (7) having an output signal,
• a rear ionization chamber signal amplifier (13),
• a data collector (12) having an output, and
• a computer (14) having an input and an output,
• wherein the first slit (2) and the acousto-optic tunable X-ray filter (9) are arranged sequentially along the light beam emitting direction of the X-ray source (1);
• the second slit (4), the front ionization chamber (5), the sample to be tested (6), and the rear ionization chamber (7) are arranged sequentially along the light beam emitting direction of the acousto-optic tunable X-ray filter (9);
• the output signal of the front ionization chamber (5) is amplified by the front ionization chamber signal amplifier (11), and then transmitted to the data collector (12);
• the output signal of the rear ionization chamber (7) is amplified by the rear ionization chamber signal amplifier (13), and then transmitted to the data collector (12);
• the output of the data collector (12) is connected with the input of the computer (14);
• the output of the computer (14) is connected with the input of the radio frequency transmitter (10);
• and
• the excitation signal sent by the radio frequency transmitter (10) is transmitted to the acousto-optic tunable X-ray filter (9).