Construction of a Magnetic Bottle Electron Spectrometer for Electron Energy Measurement in BISER X-Rays and Xe Interaction

Quantum science and technology Kansai group has found new harmonics X-ray radiation from the relativistic laser-produced plasma, burst intensification by singularity emitting radiation (BISER). As a next step, the BISER pulse width is one of the unclear parameters, and its measurement is essential for applications of BISER to scientific and engineering fields. Therefore, we designed and constructed a magnetic bottle time-of-flight electron spectrometer to characterize the BISER pulse width using a pump-probe method (attosecond streaking). The spectrometer configuration was determined through numerical calculations to obtain a high-energy resolution of approximately 0.2 eV. The electron spectra of the xenon atom irradiated with the BISER X-rays were measured to verify the performance. Consequently, we successfully measured 8.26-eV Auger spectra associated with 4d inner-shell electrons in the test experiment. We demonstrate the experimental results and discuss the signal-to-noise ratio affected by electromagnetic noise generated by the relativistic plasma. (C) 2022 The Japan Society of Plasma Science and Nuclear Fusion Research

Automated summary

The Quantum Science and Technology Kansai group has discovered new harmonics X-ray radiation from relativistic laser-produced plasma, known as burst intensification by singularity emitting radiation (BISER). In this study, a magnetic bottle time-of-flight electron spectrometer was designed and constructed to characterize the BISER pulse width using a pump-probe method. The performance of the spectrometer was verified by measuring the electron spectra of xenon atoms irradiated with BISER X-rays. Experimental results showed the successful measurement of 8.26-eV Auger spectra associated with inner-shell electrons.