Abstract:
The invention relates to a method of determining the temperature of a sample carrier in a charged particle-optical apparatus, characterized in that the method comprises the observation of the sample carrier with a beam of charged particles, the observation giving information about the temperature of the sample carrier. The invention is based on the insight that a charged particle optical apparatus, such as a TEM, STEM, SEM or FIB, can be used to observe temperature related changes of a sample carrier. The changes may be mechanical changes (e.g. of a bimetal), crystallographic changes (e.g. of a perovskite), and luminescent changes (in intensity or decay time). In a preferred embodiment the sample carrier shows two bimetals (210a, 21 0b), showing metals (208, 210) with different thermal expansion coefficients, bending in opposite directions. The distance between the two bimetals is used as a thermometer.
Abstract:
The invention relates to a method of determining the temperature of a sample carrier in a charged particle-optical apparatus, characterized in that the method comprises the observation of the sample carrier with a beam of charged particles, the observation giving information about the temperature of the sample carrier. The invention is based on the insight that a charged particle optical apparatus, such as a TEM, STEM, SEM or FIB, can be used to observe temperature related changes of a sample carrier. The changes may be mechanical changes (e.g. of a bimetal), crystallographic changes (e.g. of a perovskite), and luminescent changes (in intensity or decay time). In a preferred embodiment the sample carrier shows two bimetals (210a, 21 0b), showing metals (208, 210) with different thermal expansion coefficients, bending in opposite directions. The distance between the two bimetals is used as a thermometer.
Abstract:
The invention relates to a method of determining the temperature of a sample carrier in a charged particle-optical apparatus, characterized in that the method comprises the observation of the sample carrier with a beam of charged particles, the observation giving information about the temperature of the sample carrier. The invention is based on the insight that a charged particle optical apparatus, such as a TEM, STEM, SEM or FIB, can be used to observe temperature related changes of a sample carrier. The changes may be mechanical changes (e.g. of a bimetal), crystallographic changes (e.g. of a perovskite), and luminescent changes (in intensity or decay time). In a preferred embodiment the sample carrier shows two bimetals (210a, 21 0b), showing metals (208, 210) with different thermal expansion coefficients, bending in opposite directions. The distance between the two bimetals is used as a thermometer.
Abstract:
The present invention relates to a method to reduce drift of a sample and/or its image in a microscopy system, wherein the method comprises determining an expected thermal drift of the sample, and compensating for the drift of the sample and/or its image based upon the expected thermal drift. The present invention also relates to a corresponding microscopy system and a computer program product to perform the method according to the present invention.
Abstract:
The invention relates to a method of imaging a sample, said sample mounted on a sample holder in an electron microscope, the electron microscope comprising an electron source for generating a beam of energetic electrons along an optical axis and optical elements for focusing and deflecting the beam so as to irradiate the sample with a beam of electrons. The sample holder is capable of positioning and tilting the sample with respect to the electron beam. The method comprises the step of acquiring a tilt series ts, tm, te of images by irradiating the sample with the beam of electrons, and concurrently changing a position Ps,Pm,Pe of the sample during acquisition of the images, so that each image is acquired at an associated unique tilt angle t and an associated unique position P.
Abstract:
A method of calibrating a Scanning Transmission Charged-Particle Microscope comprising: - A specimen holder, for holding a specimen; - A source, for producing a beam of charged particles; - An illuminator, for directing said beam so as to irradiate the specimen; - An imaging system, for directing charged particles that traverse the specimen onto a detector; - Scanning means, for causing said beam to undergo scanning motion relative to a surface of the specimen,
which microscope can be operated in: - A non-scanning mode, whereby said beam is relatively broad and said detector forms an image without invocation of said scanning means; or - A scanning mode, whereby said beam is relatively narrow and said detector accumulates an image as a function of scan position of said beam,
which method comprises the following steps: - Providing a calibration specimen on said specimen holder; - In non-scanning mode, using said detector to form a calibration image of the calibration specimen, using a given configuration of said imaging system; - Utilizing a known dimension of said calibration specimen and comparing it to a corresponding dimension in said calibration image to calibrate a characteristic dimension of a field of view of said detector; - In scanning mode, recording a beam pattern of said beam in the calibrated field of view of said detector, and examining the recorded beam pattern to derive a geometric aspect thereof.