摘要:
An electrostatic lens unit (23) for a charged particle beam system includes an insulating sheet (35, 37) having first and second opposite sides (42, 43) and comprising first and second laterally-spaced portions (35, 37). The first insulating sheet portion (37) is arranged to provide a cantilever (25) supporting a tip (26) for nanometre-scale probing of a surface of a sample adjacent the second side of the sheet. The second insulating sheet portion supports first and second electrodes (69, 81) on the first and second sides (42, 43) respectively and has an aperture (41) for allowing passage of a charged particle beam through the electrodes from the first side to the second side of the sheet.
摘要:
A method and apparatus for measuring physical properties of a micro region in which the two-dimensional distribution of stress or strain can be measured in real time with high resolution, high sensitivity and high alignment of measuring position. A sample is scanned with a finely focused electron beam (23, 26), and the positional difference between the diffraction spots (32, 33) is measured by means of a two-dimensional position sensitive electronic sensor (13). The positional difference is outputted as a voltage value and converted into a magnitude of stress or strain according to the principle of nanodiffraction method ,and the distribution of the stress or strain is displayed as an image in synchronism with a position signal on the sample.
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:
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Gefügeanalyse an polykristallinen Festkörperproben unter Anwendung der Kikuchi-Technik zu schaffen, mit dem gegenüber dem Stand der Technik die Erzeugung eines Gefügebildes wesentlich schneller und exakter mit Hilfe der üblichen rasterelektronenmikroskopischen Abbildungsverfahren mittels Sekundär- bzw. Rückstreuelektronen möglich ist. Diese Aufgabe wird nach der Erfindung mit einem Verfahren gelöst, bei dem man
a) in einem Rasterelektronenmikroskop (REM) von der Oberfläche der Festkörperprobe in an sich bekannter Weise ein Gefügebild mit hoher Abbildungstreue beziehungsweise Auflösung aufnimmt, b) aus dem Gefügebild bildanalytisch die geometrischen Schwerpunkte der Körnerschnittflächen ermittelt und von diesen die zugehörigen Vektoren beziehungsweise Kordinaten im Gefügebild bestimmt und zur Bildung eines Datensatzes heranzieht, c) den erhaltenen Datensatz zur punktweisen Steuerung der Position des Primärstrahls des REM auf der Oberfläche der Festkörperprobe verwendet und d) an diesen Positionen mit Hilfe der Kikuchi-Technik die Orientierung der Körner an der Oberfläche der Festkörperprobe ermittelt.
摘要:
A low energy electron diffraction (LEED) detection module (100) includes: a first vacuum chamber for receiving diffracted electrons from a specimen (109); a larger second vacuum chamber connected to the first vacuum chamber to receive the diffracted electrons that have been transported through the first vacuum chamber; a two-dimensional electron detector disposed in the second vacuum chamber to detect the diffracted electrons; a potential shield (106) disposed generally along an inner surface of the first vacuum chamber and an inner surface of the second vacuum chamber; a magnetic lens (105) to expand a beam of the diffracted electrons that have been transported through the first vacuum chamber towards the two-dimensional electron detector; and a generally plane-shaped energy filter (103) to repel electrons having an energy lower than the probe beam (203) of electrons that impinges on the specimen (109).
摘要:
A scanning reflection electron diffraction microscope causes a primary electron beam (4) from its electron gun (2) to be reflectively diffracted from a sample (7) and a diffraction pattern to be formed on fluorescent screen (9). An optical lens (10) reduces this diffraction pattern in size and forms its reduced image on a photoelectric surface (11), thereby producing an image-carrying electron beam. Deflected by a deflecting system including a deflecting coil (12) and a condenser coil (13), the image-carrying electron beam is detected by an electron-multiplier (15) such that a diffraction pattern is displayed on a cathode ray tube (19).
摘要:
A low energy electron diffraction (LEED) detection module (100) includes: a first vacuum chamber for receiving diffracted electrons from a specimen (109); a larger second vacuum chamber connected to the first vacuum chamber to receive the diffracted electrons that have been transported through the first vacuum chamber; a two-dimensional electron detector disposed in the second vacuum chamber to detect the diffracted electrons; a potential shield (106) disposed generally along an inner surface of the first vacuum chamber and an inner surface of the second vacuum chamber; a magnetic lens (105) to expand a beam of the diffracted electrons that have been transported through the first vacuum chamber towards the two-dimensional electron detector; and a generally plane-shaped energy filter (103) to repel electrons having an energy lower than the probe beam (203) of electrons that impinges on the specimen (109).
摘要:
Provided is an image type electron spin polarimeter. It at least comprises a scattering target, a two-dimensional electron detector and an electron bending unit, wherein the electron bending unit is used for bending the orbit of the incident (scattered) electrons to a first (second) angle to arrive the scattering target (two-dimensional electron detector) with an optimal incident angle, and to transfer the image of the electron intensities from the entrance plane (scattering target) to the scattering target (two-dimensional electron detector) with small aberrations, and to separate the orbits of incident and scattered electrons to increase the degree of freedom of the geometric configuration of each component of the spin polarimeter. At least one of the first and second angles is not 0°, thereby achieving the first transfer of the two-dimensional image of electron intensities on the entrance plane to the scattering target and the second transfer from scattering target to the two-dimensional electron detector respectively with small aberrations, and then achieving multichannel measurements of the electron spin.