Beam line 14-3a, located on the upstream table of the hutch of the BL14-3 bending magnet side station, is dedicated to bulk x-ray absorption spectroscopy of biological, materials, and geological samples in the tender x-ray photon energy range 2.1-5.0 keV. BL14-3 is the only beam line at SSRL capable of obtaining spectroscopy data at the phosphorous K edge. In this configuration the beam is unfocused over a size of 1 mm x 6 mm to allow for high energy-resolution measurements on homogenous samples. BL14-3 is equipped with ionization chambers, as well as a Vortex silicon drift detector and PIPS detector for fluorescence XAS. Samples are placed inside a helium environment. A motorized sample holder stage allows sequential automated (via queueing) measurement on multiple samples without sample changeover delays.
| Status | Open |
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| Supported Techniques | X-ray Absorption Spectroscopy |
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| Main Scientific Disciplines | Bioscience Catalysis Environmental Sciences Materials Sciences |
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| Beam Line Specifications | |||||||||||
SourceBending Magnet
OpticsM0 mirror: Flat, bent, vertically collimating, 1 m, Si, Ni-coated, Monochromator: Water-cooled Si(111) ɸ=0, Si(111) ɸ=90 double crystal Monochromator Crystal Glitch Library (Crystal changes need to be scheduled and coordinated in advance with BL support staff) M1 mirror: Bent, toroidal, 1.2 m, Ni-coated Absorptionnone |
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| Instrumentation | Detectors: ionization chambers, Vortex detector, 4-element Vortex detector, large-area PIPS Sample Positioning: 4-slot and 8-slot motorized sample holder for bulk spectroscopy. A utomatic scan queueing available for multiple samples and/or spots
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| Sample Environment | Helium environment Ambient temperature and pressure. Cryo Industries, Cryocool-LHe, LHe cryostream available for cooling (20 - 200 K) Sample size: flexible, typically 5 x 15 mm solids and 2 mM or higher solutions. |
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| Data Acquisition and Analysis | XASscan, EXAFSPAK, SixPAK |
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| Beam Line Phone | 650-926-5143. On-site Users: Contact the Duty Operator at 9-926-4040 |
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| Beam Line Contact | |||||||||||
