Asynchronous x-ray multiprobe data acquisition for x-ray transient absorption spectroscopy
| العنوان: | Asynchronous x-ray multiprobe data acquisition for x-ray transient absorption spectroscopy |
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| المؤلفون: | Eli Diego Kinigstein, Christopher Otolski, Guy Jennings, Gilles Doumy, Donald A. Walko, Xiaobing Zuo, Jinghua Guo, Anne Marie March, Xiaoyi Zhang |
| المصدر: | The Review of scientific instruments, vol 94, iss 1 |
| بيانات النشر: | AIP Publishing, 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Engineering, Physical Sciences, Chemical Sciences, Instrumentation, Applied Physics |
| الوصف: | Laser pump X-ray Transient Absorption (XTA) spectroscopy offers unique insights into photochemical and photophysical phenomena. X-ray Multiprobe data acquisition (XMP DAQ) is a technique that acquires XTA spectra at thousands of pump-probe time delays in a single measurement, producing highly self-consistent XTA spectral dynamics. In this work, we report two new XTA data acquisition techniques that leverage the high performance of XMP DAQ in combination with High Repetition Rate (HRR) laser excitation: HRR-XMP and Asynchronous X-ray Multiprobe (AXMP). HRR-XMP uses a laser repetition rate up to 200 times higher than previous implementations of XMP DAQ and proportionally increases the data collection efficiency at each time delay. This allows HRR-XMP to acquire more high-quality XTA data in less time. AXMP uses a frequency mismatch between the laser and x-ray pulses to acquire XTA data at a flexibly defined set of pump-probe time delays with a spacing down to a few picoseconds. AXMP introduces a novel pump-probe synchronization concept that acquires data in clusters of time delays. The temporally inhomogeneous distribution of acquired data improves the attainable signal statistics at early times, making the AXMP synchronization concept useful for measuring sub-nanosecond dynamics with photon-starved techniques like XTA. In this paper, we demonstrate HRR-XMP and AXMP by measuring the laser-induced spectral dynamics of dilute aqueous solutions of Fe(CN)64− and [FeII(bpy)3]2+ (bpy: 2,2′-bipyridine), respectively. |
| وصف الملف: | application/pdf |
| تدمد: | 1089-7623 0034-6748 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18b3e24326ec32eeedbbba7322680e5a https://doi.org/10.1063/5.0100596 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....18b3e24326ec32eeedbbba7322680e5a |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 10897623 00346748 |
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