摘要:
A method and device for electron diffraction tomography of a crystal sample, which employs scanning of the electron beam over a plurality of discrete locations of the sample, in combination with a beam scanning protocol as the beam converges at every discrete location (42, 43) of the sample (38) to obtain a series of electron diffraction patterns, use of template matching to determine crystal orientations and thickness maps to obtain a common intensity scaling factor.
摘要:
A method and apparatus for measuring the physical properties of a micro region measures the two-dimensional distribution of stress/strain in real time at high resolution and sensitivity and with a high level of measuring position matching. A sample is scanned and irradiated with a finely focused electron beam (23, 26), and the displacement of position of a diffraction spot (32, 33) is measured by a two-dimensional position-sensitive electron detector (13). The displacement amount is outputted as a voltage value that is then converted into the magnitude of the stress/strain according to the principle of a nano diffraction method, and the magnitude is displayed in synchronism with a sample position signal.
摘要:
A scanning transmission electron microscope for scanning a primary electron beam on a sample, detecting a transmitted electron from the sample by a detector, and forming an image of the transmitted electron. The scanning transmission electron microscope includes an electron-optics system which enables switching back the transmitted electron beam to the optical axis by a predetermined quantity, and a determining unit for determining the quantity based on a displacement of the transmitted electron with respect to the detector caused by the scanning of the primary electron beam.
摘要:
The invention relates to a method for determining at least one mechanical parameter of at least one material in a composite system comprising at least two distinct phases, characterized in that it comprises: a) the production of at least one specimen comprising a first part of a first phase and a second part of a second phase, the second part consisting of the material to be characterized, the specimen having at least one dimension small enough to allow the strains in said specimen to be relaxed; b) the measurement, on said specimen, of at least one deformation parameter of at least said first phase, in correspondence with a plurality of points lying at different distances from an interface between said first and second phases; and c) the determination, from at least said deformation parameter, of at least one mechanical parameter of said second phase.
摘要:
Disclosed is an observation apparatus and method using an electron beam, capable of measuring stress and strain information on a crystal structure in a specimen using electron beam diffraction images. A method according to the invention includes mounting a specimen on a specimen stage; irradiating a predetermined area in the specimen with an electron beam while scanning the electron beam, and acquiring an enlarged image of a specimen internal structure in the predetermined area; irradiating a specific portion included in the predetermined area and acquiring a diffraction image showing the crystal structure in the specimen; extracting information on the crystal structure in the specimen; displaying the information of the crystal structure in the specimen so as to be superimposed on the acquired enlarged image. The observation method according to the invention can obtain information on the crystal structure in a specimen with a high degree of sensitivity and with a high level of resolution.
摘要:
A method for large-angle convergent-beam diffraction comprises selecting a portion of the diffraction pattern formed by an objective lens, by the use of a diaphragm. Then, a portion of the electron micrograph which is formed by the electron beam passed through the diaphragm is detected, thus producing a signal. This enables a large-angle convergent-beam electron diffraction method that permits one to examine a specimen region which is much narrower than conventional.
摘要:
An improved transmission-type, scanning charged-particle beam microscope including a television camera tube and a television display tube for generating and displaying a diffraction image of a specimen to be examined. The improvement of the invention comprises the provision of a transparent fluorescent screen disposed in the ray cone of the beam behind the specimen along the beam path in the microscope, light-optical means adapted for imaging the fluorescent screen on a target of the television camera tube, and detector means for integrally detecting radiation emanating from the fluorescent screen.
摘要:
A camera for photographing Kossel lines caused by irradiating crystalline specimens with electron beams is disclosed. Previously such photographs were taken either by back reflection or transmission methods with the plane of the photographic plate perpendicular to the beam axis. This causes numerous disadvantages. In the present embodiment the photographs are taken in a plane parallel to the electron beam, and technique for interpreting the photographs so taken is fully explained.
摘要:
A method of, and a detector for, performing energy sensitive imaging of ionizing radiation are provided, including acquiring a first frame having a plurality of pixels, each pixel of the plurality having an energy of detection and a location; grouping, into a cluster, pixels of the plurality having an energy of detection above a predetermined threshold and a location along with at least one other pixel also having an energy of detection above the predetermined threshold and being within a predetermined distance of the location; summing the energy of detection of all pixels within the grouped cluster to determine a cluster energy; determining a location of the cluster based on a distribution and an intensity of the summed energy of detection; and generating an image of the cluster based on the determined cluster energy and the determined location of the cluster.
摘要:
An SACP method includes directing a beam of charged particles onto an object surface of an object using a particle optical system, and detecting intensities of particles emanating from the object. The method further includes: (a1) adjusting an excitation of the second beam deflector for adjusting an impingement location of the beam on the object surface; (a2) adjusting an excitation of the first beam deflector for adjusting an angle of incidence of the beam on the object surface without changing the impingement location and detecting the intensity; and (a3) repeating the adjusting of the excitation of the first beam deflector for adjusting the angle of incidence without changing the impingement location such that a corresponding intensity is detected for each of at least 100 different angles of incidence at the same impingement location.