electron-ray
111Cathode ray — Cathode rays (also called an electron beam or e beam) are streams of electrons observed in vacuum tubes, i.e. evacuated glass tubes that are equipped with at least two electrodes, a cathode (negative electrode) and an anode (positive electrode)… …
112Chandra X-ray Observatory — ▪ United States satellite U.S. satellite, one of the National Aeronautics and Space Administration (NASA) fleet of “Great Observatories” satellites, which is designed to make high resolution images of celestial X ray sources. In operation since… …
113Surface-conduction electron-emitter display — A surface conduction electron emitter display (SED) is a flat panel display technology that uses surface conduction electron emitters for every individual display pixel. The surface conduction emitter emits electrons that excite a phosphor… …
114X-ray notation — is a method of labeling atomic orbitals that grew out of X ray science. It is still traditionally used with most x ray spectroscopy techniques including AES and XPS. In X ray notation, every principal quantum number is given a letter associated… …
115Scanning Electron Microscopy — Microscopie électronique à balayage Pour les articles homonymes, voir MEB, SEM et Microscope. Microscope électronique à balayage JEOL JSM 6340F …
116cathode ray — a flow of electrons emanating from a cathode in a vacuum tube and focused into a narrow beam. [1875 80] * * * Stream of electrons leaving the negative electrode, or cathode, in an evacuated or gas filled discharge tube or emitted by a heated… …
117Scanning transmission electron microscopy — A scanning transmission electron microscope (STEM) is a type of transmission electron microscope. With it, the electrons pass through the specimen, but, as in scanning electron microscopy, the electron optics focus the beam into a narrow spot… …
118Scanning Electron Microscope — Staubprobe von den WTC Anschlägen mit dem Rasterelektronenmikroskop aufgenommen Als Rasterelektronenmikroskop (REM) (englisch Scanning Electron Microscope, SEM) bezeichnet man ein Elektronenmikroskop, bei dem ein Elektronenstrahl in einem… …
119delta ray — Physics. a low energy electron emitted by a substance after bombardment by higher energy particles, as alpha particles. [1905 10] * * * ▪ physics in physics, any atomic electron that has acquired sufficient energy by recoiling from a… …
120cathode-ray tube — /kath ohd ray / a vacuum tube generating a focused beam of electrons that can be deflected by electric fields, magnetic fields, or both. The terminus of the beam is visible as a spot or line of luminescence caused by its impinging on a sensitized …
