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BM

Beam



Related Terms

ELASTIC CURVE

The curved shape of the longitudinal centroidal surface of a beam when the transverse loads acting on it produced wholly elastic stresses.

ION MACHINING

Use of a high-velocity ion beam to remove material from a surface. Also known as ion beam thinning, ion milling.

ELECTRON-BEAM CHANNELING

The technique of transporting high-energy, high-current electron beams from an accelerator to a target through a region of high-pressure gas by creating a path through the gas where the gas density may be temporarily reduced; the gas may be ionized; or a current may flow whose magnetic field focuses the electron beam on the target.

REFLECTING PRISM

A prism that deviates a light beam by internal reflection.

GRAPHITE ANODE

  1. One of the electrodes of graphite used in a mercury cell to produce chlorine by electrolysis. 2. The rod of graphite which is inserted into the mercury-pool cathode of an ignitron to start current flow. 3. The collector of electrons in a beam power tube or other high-current tube.

COMMON JOIST

An ordinary floor beam to which floor boards are attached.

ELECTRON-BEAM ION SOURCE

A source of multiply charged heavy ions which uses an intense electron beam with energies of 5 to 10 kiloelectronvolts to successively ionize injected gas. Abbreviated EBIS.

ABAFT OF THE BEAM

Bearings over the beam to the stern, the ships after sections.

JOIST

A steel or wood beam providing direct support for a floor.

WEB

Multiple component vertical sections forming a reinforced beam or multiple athwartship sections forming a reinforced frame.

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