General Lab Information

Beamlines

About 6-BM BMM Beamline

BMM offers intense broadband x-rays delivered by a 3-pole wiggler source with x-ray energies ranging from 4.0 keV to 23.5 keV with a collimated beam size of 8 mm (H) by 1 mm (V) or a focus spot size of 300 µm (FWHM).

The optical system of the beamline uses a paraboloid collimating mirror, a monochromator that can quickly change between Si(111) and Si(311), a toroidal focusing mirror, and a flat harmonic rejection mirror. Together these provide light to the highly usable endstations. The optical system offers several modes of operation: a large, unfocused beam, a spot focus, a line focus (focus in the horizontal, collimated in the vertical), and a proper harmonic rejection using mirrors throughout the full energy range. All beam profiles are delivered to both XAS and XRD endstations.

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About 7-BM QAS Beamline

QAS offers intense broadband x-rays delivered by a three-pole wiggler source with x-ray energies ranging from 4.7 keV to 31 keV (Ti K-edge to Sn K-edge). The beamline can run in unfocused mode, with a maximum spot size of ~1.5 mm(V) x 10 mm(H), and in focused mode, with a spot size down to ~0.5 mm(V) x 0.5 mm(H).

The optical system of the beamline consists first of a vertically collimating mirror (700 mm long) that can be switched between two stripes, Rh and Pt. The QAS monochromator has a Si(111) channel-cut crystal and runs in continuous scan mode using a direct-drive servomotor, with EXAFS scan times of 30 seconds or less. The last optical element is a toroidal focusing mirror (1000 mm long) with a Rh coating.

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About 8-ID ISS Beamline

The ISS beamline is a high flux, fast-scanning damping wiggler hard x-ray spectroscopy beamline, operating in the energy range of 4.9-32 keV. The beamline is optimized for in situ and operando experiments for batteries, electro- and heterogeneous catalysis, and other classes of materials. The high throughput setup enables the data acquisition of hundreds of samples per day. Several designs of growth chambers and high temperature reactors (up to 1000 C) are integrated into the beamline controls and data acquisition systems. High resolution x-ray spectrometers are currently in the science commissioning status.

The x-ray optics of the beamline consists of a collimating mirror system (Pt/Si/Rh coating), a high heat load Si(111) monochromator, an optional high resolution Si(311) monochromator (in commissioning), a focusing toroid mirror (Pt/Rh), and the high harmonics rejection mirror system (Rh/Si/Pt) located in the endstation. Additional focusing is provided by a policappilary lens in the endstation.

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