Beamline overview

This beamline utilizes X-ray diffraction (XRD) technique in energy-dispersive and angle-dispersive modes to carry out experiments mainly focused on engineering problems, viz; stress measurement, texture measurement, micro structure and elastic constants determination in variety of bulk as well as thinfilm samples. The flexible design of beamline allows various types of X-ray scattering experiments such as grazing angle diffraction, X-ray reflectivity and energy dispersive XRD. Additionally, the beamline has insitu high temperature (up to 900 K) facility with vacuum (better than 5×10-5 mbar) environment. The facility for insitu XRD during mechanical loading will be added soon.

This beamline enables a wide range of experiments:

1. Residual stress measurements in thinfilms and bulk samples
2. Powder diffraction, line profile analysis
3. Energy dispersive XRD
4. X-ray reflectivity, Resonant X-ray reflectivity
5. High resolution XRD for epitaxial thin films
6. High temperature (Room Temperature to ~900 K) and Low Temperature XRD measurements down to ~100 K
7. X-ray absorption near edge spectroscopy (XANES)
8. Anomalous X-ray diffraction
9. Grazing incidence X-ray diffraction (GIXRD)

Beamline parameters & Optical layout

Schematic layout of the engineering application beamline (not to the scale)

Experimental station

A high-precision open Eulerian cradle six-circle Huber diffractometer :

Can accommodate a sample up to ~15 kg weight, has sphere of confusion of 50 μm for all axis movement.

Can handle a sample size up to: 1000 mm (L), 500 mm (W) and 45 mm thickness.

Allows a high 2θ range up to 170 deg. with a step size accuracy of 0.0002 deg.

2D PSD with ~6 deg coverage and pixel size of~0.016 deg	1D PSD with ~3.5 deg coverage and pixel size of ~0.003 deg
Energy range 5 -35 keV Resolution 122 eV FWHM at 5.9 keV, Count rates > 1,000,000 CPS	Energy range 5 -300 keV Resolution 550 eV FWHM at 122 keV, Count rates > 50,000 CPS

	A high temperature stage (reflection geometry) for insitu XRD experiments from RT to ~900 K under high vacuum atmosphere (better than 5×10-5 mbar) , temperature stability ~0.5 K and 2θ range up to 100 deg.
	Linkam stage (transmission geometry) temperature range from 77 K to 873 K high heating rate upto 150 K/min 2θ range of ~40 deg.