Low dose, limited energy spectroscopic x-ray microscopy

Johanna Nelson Weker; Yiyang Li; William C. Chueh

doi:10.1117/12.2190799

18 September 2015 Low dose, limited energy spectroscopic x-ray microscopy

Johanna Nelson Weker, Yiyang Li, William C. Chueh

Proceedings Volume 9592, X-Ray Nanoimaging: Instruments and Methods II; 95920N (2015) https://doi.org/10.1117/12.2190799
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

In order to achieve high quality in situ spectroscopic X-ray microscopy of complex systems far from equilibrium, such as lithium ion batteries under standard electrochemical cycling, careful consideration of the total number of energy points is required. Enough energy points are need to accurately determine the per pixel chemical information; however, total radiation dose needs to be limited to avoid damaging the system which would produce misleading results. Here we consider the number of energy points need to accurately reproduce the state of charge maps of a LiFePO₂ electrode recorded during electrochemical cycling. We observe very good per pixel agreement using only 13 energy points. Additionally, we find the quality of the agreement is heavily dependent on the number of energy points used in the post edge fit during normalization of the spectra rather than the total number of energies used. Finally, we suggest a straightforward protocol for determining the minimum number of energy points needed prior to initiating any in situ spectroscopic X-ray microscopy experiment.

Citation Download Citation

Johanna Nelson Weker, Yiyang Li, and William C. Chueh "Low dose, limited energy spectroscopic x-ray microscopy", Proc. SPIE 9592, X-Ray Nanoimaging: Instruments and Methods II, 95920N (18 September 2015); https://doi.org/10.1117/12.2190799

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available