mspd
Materials Science and Powder Diffraction Beam Line
The Materials Science and Powder Diffraction Beamline will be devoted to high resolution powder diffraction and high pressure powder diffraction using diamond anvil cells. The beamline will operate between 8 and 50 keV. This energy range covers very well the desirable range for almost any powder diffraction experiment, and at the same time it will be possible to perform both total scattering experiments, and high pressure diffraction, for which it is desirable and sometimes necessary to have high energy sources (E > 30 KeV). To accommodate the different experimental techniques there will be two experimental end stations, one devoted to high resolution powder diffraction and the second one to high pressure experiments.
staff
Francois Fauth: Beamline Scientist, 93 592 4325, email: ffauth at cells.es
Inma Peral : Beamline Scientist, 93 592 4421, email: iperal at cells.es
Catalin Popescu: post-doc, 93 592 4364, email: cpopescu at cells.es
Llibert Ribo: Beamline Engineer
Zbigniew Reszela: Controls Engineer
Francesc Farré: Technician
beamline characteristics
| Photon Energy Range | 8 - 50 keV |
| Flux at sample | ~ 4 1012 ph/s |
| Energy resolution | 2 10-4 |
| Beam size at sample |
variable: 1.5 x 5mm2 to 0.010 x 0.040mm2 |
| Beam divergence at sample | variable |
the beamline
preparing your experiment
PD endstation Sample preparation
Absorption should be considered since it might be an issue for heavy elements containing samples. Calculate the linear absorption coefficient, μ (in cm-1), of the sample at the wavelength at which data will be acquired. Note, to minimise absorption correction μ*r should be <1, where r = radius of capillary (in cm) and μ must take into account the packing density (generally 40-60%). The following web pages provide tools to calculate it: APS absorption tool and NIST scattering tables
Standard set-up consist on powder samples loaded into glass capillaries. This video gives an idea for the first time users
The composition of the samples should be known by the local contact since fluorescence reduces considerably the signal to noise ratio of the mythen detector. This problem can be avoided (in most cases) with the proper beamline configuration.
HP endstation. Sample preparation
Please contact beamline staff to verify availability of Diamond Anvil Cells.
mspd publications, workshops and diffraction software
documentation
design tools
Laue spots identification in Channel Cut Monochromators
links
news @ mspd newsletter
Status: in operation
Milestones
2009 August: Erection of the Experiments and Optics lead hutch
2010 May: Installation of the main optical components.
2011 October 11: First beam at Optics Hutch.
2012 June: First high pressure experiments
2012 September: First powder diffraction experiments
