High-repetition-frequency attosecond pulse photoelectron and ion energy spectrum measuring system and method thereof

Abstract

The invention relates to a high-repetition-frequency attosecond pulse photoelectron and ion energy spectrum measuring system and a method thereof. The working principle is characterized in that aftera photoelectron or an ion pulse enters a time flight tube and before overlapping of time and space broadening of the photoelectron or ion pulse, a photoelectron or ion pulse strobing gate which is triggered and controlled by a photon or ion pulse synchronizing signal is placed; the strobing gate only selects certain frequency-divided pulse of the repetition frequency of the original photoelectronor ion pulse for passing, and finally photoelectron or ion energy spectrum measurement is performed through the time flight tube. According to the method of the invention, the method of reducing the repetition frequency of the photoelectron or the ion pulse is utilized so that the time interval between adjacent photoelectrons or ion pulses is increased, and overlapping of two adjacent pulses at atime flight spectrum instruction detector is prevented.

Description

technical field [0001] The invention relates to a measurement technology for high repetition frequency photoelectron and ion energy spectrum or momentum spectrum, in particular to a high repetition frequency attosecond pulse photoelectron energy spectrum measurement system and method. Background technique [0002] Attosecond science is being combined with more and more disciplines, and attosecond pulses are being applied in more and more fields. However, the current attosecond pulse photon flux is relatively low, resulting in long data acquisition time in many applications, affecting the accuracy of the experiment, and also limiting the expansion of its application range, such as in coincidence spectroscopy (Coincidence Spectroscopy). Attosecond pulses with a high repetition rate can greatly increase the data acquisition rate, thereby reducing the acquisition time, and at the same time can reduce the system's stringent requirements for long-term stability. [0003] Due to t...

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Problems solved by technology

[0007] The invention provides a high repetition frequency attosecond pulse photoelectron and ion energy spectrum measurement system and method, which solves the problem of high repetition frequency high-order harmonics and attosecond pulse photoelectron or ion of up to tens of kHz and above repetition frequency The electron or ion pulse overlap problem in the energy spectrum measurement process overcomes the shortcomings of existing time-of-flight spectrometers that cannot be applied to high repetition frequency photoelectron or ion energy spectrum measurement

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