BL11U

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Scientific Scope
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The BL11U high-pressure diffraction beamline is a dedicated experimental platform designed for studying material structures under extreme high-pressure conditions. Utilizing the high brightness and penetration power of synchrotron radiation X-rays, combined with high-pressure devices such as diamond anvil cells (DAC) and large-volume presses, it can generate static high-pressure environments ranging from tens to millions of atmospheres. Equipped with micro-focused beams (micron to sub-micron scale), high-precision sample stages, and rapid two-dimensional detectors, it supports multiple modes including powder diffraction, single-crystal diffraction, and radial diffraction. This enables real-time measurements of lattice changes, phase transition pathways, equations of state, and electronic structure evolution in materials under high pressure. The beamline is widely applied in cutting-edge research areas such as mineral physics of Earth's deep interior, planetary science, superhard material synthesis, high-pressure superconducting mechanisms, and energetic material properties. Additionally, it provides coupled extreme conditions including cryogenic, high-temperature, and laser-heating environments, facilitating material science exploration under multi-field extreme conditions.
Beamline Layout
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Specifications
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Energy

9.6-33.1 keV

Energy resolution（∆E/E）

1.9×10-4

Minimum beam size at Sample（FWHM）

2.0 mm(H)×2.0 mm(V)（FWHM）

Photon flux（@300 mA）

1.8×1010 phs/s@30 keV

Beam divergence at sample

1.0 mrad(H)×0.5 mrad(V）

Endstations
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This beamline comprises three experimental stations arranged sequentially from upstream to downstream along its path: the High-Temperature Station, the Low-Temperature Station, and the Submicron Station. The High-Temperature and Low-Temperature Stations are located in the first experimental building, while the Submicron Station is situated in the second building. The BL11U beamline enables a variety of experiments including powder diffraction, single-crystal diffraction, grazing incidence diffraction, and in-situ dynamic diffraction. It is equipped with a high-precision sample stage, two-dimensional detectors, temperature and pressure-controlled sample environments, and a rapid time-resolved system, allowing real-time characterization of material microstructure evolution under external conditions such as temperature and pressure. The facility supports one-dimensional and two-dimensional absorption/diffraction measurements as well as energy-dispersive spectroscopy analysis, facilitating studies of material static structures and dynamic evolution across multiple scales and conditions.

Data Acquisition and Analysis
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The BL11U beamline acquisition system with comprehensive automation capabilities, supporting DAC gas-membrane controlled loading and resistive/laser heating functions. Based on user requirements, it can be configured to support fully automated sample collection operations, significantly enhancing user experience.