Description

The very ingenious Diacell® Bragg-(S) was the first device designed by Diacell specifically for X-ray diffraction applications. Using a screw drive mechanism and 200 μm anvil culets, pressures up to 95 GPa are achieved.  This cell was later upgraded to the Bragg-(S) Plus that incorporates conical anvils. This means that the beryllium support plates found on the conventional Bragg-(S) cell were replaced by tungsten carbide ones in the Bragg-(S) Plus.

The Bragg-(S) Plus is one of the most popular diamond anvil cells within our product portfolio.

The diamond anvil height is kept at the minimum possible for the pressure range in order to reduce absorption. Anvil alignment is achieved using a hemisphere and cup arrangement in the piston, and is maintained by means of a very high precision piston-cylinder fit. All cells are delivered fully aligned and ready for use.

In the Diacell® Bragg-(S) Plus load is applied by means of two bolts, one of which has a left-handed thread. This arrangement allows a symmetrical load to be applied to the anvils, whilst no net torque is put on the device. Accordingly, pressure on the sample may be adjusted whilst the cell is on its arcs.

Naturally, it is also possible to convert a Bragg-(S) to a Bragg-(S) Plus (and vice-versa) by replacing the hemisphere, lower plate, anvil support plates and anvils.  Please enquiry for more details.

Applications

The particular challenge of X-ray diffraction applications is to combine such conditions with the ability to observe diffracted radiation over a wide 2θ range. Moreover, due to the increasingly widespread use of image plates, and other high-performance X-ray area detectors, it is essential to be able to observe the entire 2θ cone of diffracted radiation. Weak reflections which are otherwise undetectable have thereby revealed hitherto unsuspected supercells and structures. Almax easyLab offers cells which go far towards meeting these demanding criteria. Based upon extensive finite element stress calculations, and many years of hands-on experience and practical development, these devices are manufactured to exacting standards, using carefully selected materials. The cells are suitable for use on diffractometers and most other types of X-ray equipment, with both standard tube and synchrotron X-ray sources. Single-crystal and powder samples are equally appropriate.