The resulting image is a series of dots where the x-rays strike the paper. The Transmission Laue method has the photo paper behind the crystal and the recorded pattern is of x-rays that pass through the crystal. Back-reflection involves shining x-rays through a hole in the back plate (and so also a hole in the photo paper) and capturing the image of the reflected x-rays and their diffraction pattern as they undergo Bragg scattering. Laue photography using the back plate consists of transmission, and back-reflection x-ray photography. The user may then observe the change in the pattern and using the image produced find the unit cell length of the crystal used. Then, the crystal is rotated by some angle and the x-rays are shone through again to produce a new set of rings. The oscillation method describes a form of x-ray photography where x-rays are shone through a crystal sample in order to produce a diffraction pattern that resembles a set of concentric rings. The attached microscope tube is used for alignment purposes. The cylinder is used for the oscillation method of x-ray photography and the flat screen is used for Laue photographs. Removeable from the main body are two sections - a metal cylinder, and a flat back plate. Unlike the X-ray powder camera, however, this device can take images from multiple methods of x-ray photography. This way, we can quickly access NorthStar and your detector's diagnostic tools.This device is an X-ray camera that is suited for taking photos of x-ray diffraction patterns and was used in the Chemistry department at UQ. If you need assistance, you can grant per-instance permission for MWL personnel to share control of your computer over the internet.take place over a single USB2.0 connection to a Windows 7 PC. Real-time x-ray data, MEMS gas flow sensor readings, ratemeter information, control of the detector HV etc.NorthStar 7 supports 512 x 512 as well as the standard 256 x 256 pixel image formats.Preamplifier signals are immediately digitized, and from there on, all x-ray signal processing is digital, yielding higher-quality Laue images. A Field Programmable Gate Array (FPGA) has been designed into the detector.Detector installation is much simpler with the MWL120 system - just connect a cable from the 12 volt DC laptop-style power supply, one polyflow tube from the gas regulator, and a USB cable from the computer.8 electronic NIM modules (including an oil-filled gas bubbler).The NIM bin and all NIM electronics neccessary to the MWL110 system have been miniaturized and built directly into the MWL120 detector housing.How has the MWL120 improved from the older MWL110 system? Once set with the right conditions, novice users can achieve expert results quickly with very little effort. Features "shortcut icons" for faster manual work and a "macro" facility for one-touch analysis of crystal orientation.Tries multiple combinations of starting Laue points and selects the best orientation matrix automatically.Controls the percentage of Laue spots to be indexed (troublesome points can be ignored, if needed).Accommodates small variations in the film-to-specimen distance. NorthStar 7 is the culmination of years of development work and is a great improvement over other available Laue software, especially in the area of ease of use. The 'Find Extra Planes' feature even shows the computed plane position oriented behind the collimator which you can't otherwise see when perfectly oriented! It can also collect images with increased exposure-time, find the Laue spots, and then index most of these images automatically once suitable imaging conditions are established. NorthStar doesn't just display real-time diffraction patterns. This information is piped to a computer running NorthStar 7 - the latest version of our powerful orientation software - and is displayed in real time. These X-rays then reflect off the sample back to the detector where the diffraction pattern is collected. The Laue camera interfaces with an X-ray tower and collimates the beam through the center of the camera toward the crystal sample. The MWL120 system uses the back-reflection Laue method. Manipulate the orientation of a crystal sample using our joystick-controlled motorized stages and see the diffraction pattern move in real time on a computer monitor to rapidly characterize or determine the orientation of the crystal's lattice planes. The MWL120 allows an operator to orient single crystals quickly and easily.
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