We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Theoretical development and experimental validation on the measurement of temperature by extended X‐ray absorption fine structure.
- Authors
Ye, Qing; Hu, Yun; Duan, Xiaoxi; Liu, Hao; Zhang, Huan; Zhang, Chen; Sun, Liang; Yang, Weiming; Xu, Wei; Cai, Quan; Wang, Zhebin; Jiang, Shaoen
- Abstract
A systematic investigation on the theoretical framework of the ultra‐fast measurement of temperature by extended X‐ray absorption fine structure (EXAFS) applied in laser‐driven‐compression experiments has been carried out and a new temperature measurement scheme based on the EXAFS cumulant expansion analysis and anharmonic correlated Debye model has been advanced. By considering the anharmonic effect of thermal vibration and avoiding the employment of the empirical model as well as parameters which have large inherent uncertainties in the temperature determination, this new scheme is theoretically more accurate than traditional ones. Then the performance of the new measurement scheme and traditional methods were validated on a synchrotron radiation platform by temperature‐dependent EXAFS (TDEXAFS) experiments on Au, Fe, V and Ti; the results showed that the new scheme could provide the most accurate measured temperatures with much lower uncertainties. This accurate scheme gives a firmer physical ground to the EXAFS temperature measurement technique and can expect to be applied in laser‐driven compression experiments and promote the development of matter state research at extreme conditions.
- Subjects
EXTENDED X-ray absorption fine structure; TEMPERATURE measurements; SYNCHROTRON radiation; EARTH temperature
- Publication
Journal of Synchrotron Radiation, 2020, Vol 27, Issue 2, p436
- ISSN
0909-0495
- Publication type
Article
- DOI
10.1107/S1600577520000752