A versatile Johansson-type tender x-ray emission spectrometer.
Rev Sci Instrum
; 91(3): 033101, 2020 Mar 01.
Article
in En
| MEDLINE
| ID: mdl-32259983
ABSTRACT
We present a high energy resolution x-ray spectrometer for the tender x-ray regime (1.6-5.0 keV) that was designed and operated at Stanford Synchrotron Radiation Lightsource. The instrument is developed on a Rowland geometry (500 mm of radius) using cylindrically bent Johansson analyzers and a position sensitive detector. By placing the sample inside the Rowland circle, the spectrometer operates in an energy-dispersive mode with a subnatural line-width energy resolution (â¼0.32 eV at 2400 eV), even when an extended incident x-ray beam is used across a wide range of diffraction angles (â¼30° to 65°). The spectrometer is enclosed in a vacuum chamber, and a sample chamber with independent ambient conditions is introduced to enable a versatile and fast-access sample environment (e.g., solid/gas/liquid samples, in situ cells, and radioactive materials). The design, capabilities, and performance are presented and discussed.
Full text:
1
Database:
MEDLINE
Language:
En
Journal:
Rev Sci Instrum
Year:
2020
Type:
Article
Affiliation country:
United States