Alpha diffractometer
An X-ray diffractometer system analyzes objects including biological tissue samples and physical and chemical samples. The diffractometer system includes an X-ray beam projector that projects an incident micro-beam of X-ray at an analysis target, an X-ray receiver including an X-ray detector array to detect the transmitted X-rays passed through the object and X-rays that the target diffracts, and a computer workstation for system control and data analysis. The X-ray beam projector may include a radiation source, a beam forming system including at least one of a monochromator, a collimator, and focusing device. The computer workstation may control the X-ray devices and positioning mechanisms and motors, may acquire, process, store, or display data received from diffractometric examination, and may also calculate parameters of the three-dimensional reciprocal lattice of the analyzed target.
1. A diffractometer comprising:
an X-ray beam projector positioned and aligned to direct an X-ray beam at a target to be examined,
an X-ray receiver comprising an X-ray detector array positioned to detect the X-ray beam passed through the target and detect at least a portion of X-rays that the target diffracts; and
a computer workstation;
wherein the X-ray beam projector comprises a radiation source operating in continuous mode, an apparatus forming X-ray micro-beam and comprising at least one monochromator and at least one collimating and focusing optical device;
wherein the computer workstation is intended for controlling the X-ray beam projector, the X-ray receiver, and mechanisms and motors, and for processing, storing and displaying data received from 3-D diffractometric structural analysis, and also for calculation of parameters of a three-dimensional reciprocal lattice of the target to be examined,
wherein the receiver comprises a mechanism for moving the an X-ray detector array along the direction of the X-ray micro-beam that provides approximately the same resolution of diffraction measurements at small (less than 1 degree) and large (approximately about 90 degrees) angles of diffraction angles and one or more devices designed for excitation of transverse vibrations of a two-dimensional pixel detector in relation to the incident X-ray beam, and
wherein an amplitude of the transverse vibrations of the two-dimensional pixel detector is at least not less than a pixel's pitch.
2. The diffractometer of claim 1 , wherein the X-ray detector array is in a protective container that is vacuumed or filled with an inert gas.
3. The diffractometer of claim 2 , wherein the inert gas is neon or helium.
4. The diffractometer of claim 1 , wherein the one or more devices designed for excitation of transverse vibrations employs a piezoelectric effect.
5. The diffractometer of claim 1 , wherein a frequency of the transverse vibrations of the two-dimensional pixel detector is at least not more than a frame rate.
6. The diffractometer of claim 1 wherein the transverse vibrations of the X-ray detector array are carried out due to the excitement of a longitudinal surface acoustic wave.
7. The diffractometer of claim 1 , wherein the radiation source is selected from X-ray tube or X-ray laser.
8. The diffractometer of claim 1 , wherein the X-ray beam projector and the X-ray receiver are located at opposite ends of a C-arc, wherein the diffractometer further comprises a housing containing mechanisms and motors that move and rotate the C-arc in three mutually perpendicular planes around the target.
9. The diffractometer of claim 1 , wherein the X-ray beam projector further includes a Kratki or Montel mirror collimator.
10. The diffractometer of claim 1 , wherein the X-ray beam projector further comprises an X-ray collimating mirror with a pair of X-ray mirrors that are arranged orthogonally relative to each other where the X-ray mirrors are multilayer film mirrors.
11. The diffractometer of claim 1 , wherein the X-ray detector array includes a plurality of detector elements each of which provide a signal upon receiving of X-ray photon of as incident/transmitted and scattered radiation.
12. The diffractometer of claim 1 , further comprising a laser of visible light configured to direct a visible beam to point at the X-ray micro-beam at selected points on the target.
13. The diffractometer of claim 8 , wherein the computer workstation executes a process controlling program that performs 3-D diffractometric data collection at different angles of rotation of the C-arc sequentially, and for each angle of rotation of the C-arc, a series of diffraction measurements is carried out with a change in distance from the target to the two-dimensional pixel detector.
14. The diffractometer of claim 1 , wherein the X-ray beam projector and the X-ray receiver are mounted on telescoping arms attached to a wall or a ceiling of a laboratory room.
15. The diffractometer of claim 1 , wherein the detector array comprises pixels having different values of the maximum permissible power density of X-ray radiation incident on one pixel, with the pixels located in a central region of the detector array having the highest maximum permissible power density compared to the pixels located on a periphery of the X-ray detector array.
16. The diffractometer of claim 15 , wherein the maximum permissible power density of each pixel is inversely proportional to a distance between the pixel and a central pixel of the detector array.
17. The diffractometer of claim 1 , further comprising one or more devices designed for excitation of transverse vibrations of the X-ray Beam projector so that the incident micro-beam of X-ray moves on the target parallel to itself.
18. The diffractometer of claim 1 , wherein the X-ray beam projector and the X-ray receiver are mechanically autonomous elements of design and are interconnected by means of a workstation via electrical interconnections only including wireless communications.
19. A diffractometer comprising:
an X-ray beam projector positioned and aligned to direct an X-ray beam at a target to be examined,
an X-ray receiver comprising an X-ray detector array positioned to detect the X-ry beam passed through the target and detect at least a portion of X-rays that the target diffracts; and
a computer workstation;
wherein the X-ray beam projector comprises a radiation source operation in continuous mode, an apparatus forming X-ray micro-beam and comprising at least one monochromator and at least one collimating and focusing optical device;
wherein the computer workstation is intended for controlling the X-ray beam projector, the X-ray receiver, and mechanisms and motors, and for processing, storing and displaying data received from 3-D diffractometric structural analysis, and also for calculation of parameters of a three-dimensional reciprocal lattice of the target to be examined,
wherein the receiver comprises a mechanism for moving the X-ray detector array along the direction of the X-ray micro-beam that provides approximately the same resolution of diffraction measurements at small (less than 1 degree) and large (approximately about 90 degrees) angles of diffraction angles and one or more devices designed for excitation of transverse vibrations of a two-dimensional pixel detector in relation to the X-ray micro-beam, and
wherein a frequency of the transverse vibrations of the two-dimensional pixel detector is at least not more than a frame rate.
20. A diffractometer comprising:
an X-ray beam projector positioned and aligned to direct an X-ray beam at a target to be examined,
an X-ray receiver comprising an X-ray detector array positioned to detect the X-ray beam passed through the target and detect at least a portion of X-rays that the target diffracts; and
a computer workstation;
wherein the X-ray beam projector comprises a radiation source operation in continuous mode, an apparatus forming X-ray micro-beam and comprising at least one monochromator and at least one collimating and focusing optical device;
wherein the computer workstation is intended for controlling the X-ray beam projector, the X-ray receiver, and mechanisms and motors, and for processing, storing and displaying data received from 3-D diffractometric structural analysis, and also for calculation of parameters of a three-dimensional reciprocal lattice of the target to be examined,
wherein the detector array comprises pixels having different values of maximum permissible power denstity of X-ray radiation incident on one pixel, with the pixels located in a central region of the detetor array having the highest maximum permissible power density compared to the pixels located on a periphery of the X-ray detector array, and
wherein the maximum permissible power density of each pixel is inversely proportional to a distance between the pixel and a central pixel of the detector array.