Time-resolved RIXS experiment with pulse-by-pulse parallel readout data collection using X-ray free electron laser

被引：8

作者：

Lu, H. ^{[1
]}

Gauthier, A. ^{[1
]}

Hepting, M. ^{[1
]}

Tremsin, A. S. ^{[2
]}

Reid, A. H. ^{[3
]}

Kirchmann, P. S. ^{[1
,5
,6
]}

Shen, Z. X. ^{[1
,5
,6
]}

Devereaux, T. P. ^{[1
,5
,6
,7
]}

Shao, Y. C. ^{[4
]}

Feng, X. ^{[4
]}

Coslovich, G. ^{[3
]}

Hussain, Z. ^{[4
]}

Dakovski, G. L. ^{[3
]}

Chuang, Y. D. ^{[4
]}

Lee, W. S. ^{[1
]}

机构：

[1] Stanford Univ, Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[2] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[3] SLAC Natl Accelerator Lab, Linac Coherent Light Source LCLS, Menlo Pk, CA 94025 USA

[4] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Stanford Univ, Dept Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[6] Stanford Univ, Dept Appl Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[7] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

来源：

SCIENTIFIC REPORTS | 2020年 / 10卷 / 01期

关键词：

EXCITATIONS; DYNAMICS; SCATTERING; ENERGY;

D O I：

10.1038/s41598-020-79210-4

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Time-resolved resonant inelastic X-ray scattering (RIXS) is one of the developing techniques enabled by the advent of X-ray free electron laser (FEL). It is important to evaluate how the FEL jitter, which is inherent in the self-amplified spontaneous emission process, influences the RIXS measurement. Here, we use a microchannel plate (MCP) based Timepix soft X-ray detector to conduct a time-resolved RIXS measurement at the Ti L-3-edge on a charge-density-wave material TiSe2. The fast parallel Timepix readout and single photon sensitivity enable pulse-by-pulse data acquisition and analysis. Due to the FEL jitter, low detection efficiency of spectrometer, and low quantum yield of RIXS process, we find that less than 2% of the X-ray FEL pulses produce signals, preventing acquiring sufficient data statistics while maintaining temporal and energy resolution in this measurement. These limitations can be mitigated by using future X-ray FELs with high repetition rates, approaching MHz such as the European XFEL in Germany and LCLS-II in the USA, as well as by utilizing advanced detectors, such as the prototype used in this study.

引用

页数：7

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