Edgepedia

Beam diagnostics

Beam diagnostics is the set of instruments in a particle accelerator that measure the beam's charge, position, transverse profile, and losses, including monitors, wire scanners, and beam-loss monitors.

Beam diameter

Beam diameter, also called beamwidth, is the width of a light beam, usually a laser, measured across its intensity profile by a stated criterion such as 1/e² or FWHM.

Beam dosimetry

Beam dosimetry is the measurement of absorbed dose from radiation beams, such as photon, electron, and proton beams, using ionization chambers, calorimeters, or chemical dosimeters.

Beam dump

A beam dump is a device at the end of a particle accelerator that safely absorbs extracted or aborted particle beams, converting their energy into heat.

Beam emittance

Beam emittance is a measure of a charged-particle beam's spread in transverse phase space, the ellipse area preserved by Liouville's theorem, with normalized emittance staying constant under acceleration.

Oct 22, 2026

Beam Energy Scan II

Beam Energy Scan II (BES-II) was the second, high-statistics phase of the Beam Energy Scan program at RHIC, where STAR collected gold-gold collision data from 3.0 to 27 GeV to search for a QCD critical point.

Beam extraction

Beam extraction is the process of removing a particle beam from a circular accelerator using kickers and septa, in one turn, several turns, or slowly over seconds.

Beam halo

Beam halo is a population of accelerator beam particles traveling at large radii from the beam core, likely to be lost on collimators and cause activation or quenches.

Beam management in 5G NR

Beam management in 5G NR is the set of procedures by which a gNodeB base station and user equipment acquire, select, and maintain aligned directional beams.

Beam Me Up Scotty (mixtape)

Beam Me Up Scotty is Nicki Minaj's third mixtape, released free on DatPiff April 18, 2009, hosted by DJ Holiday and The Trapaholics; reissued to streaming May 14, 2021 with 23 tracks including 'Seeing Green' with Drake and Lil Wayne.

Beam me up, Scotty

"Beam me up, Scotty" is a Star Trek catchphrase attributed to Captain Kirk that was never actually spoken in the original series; closest lines include "Scotty, beam us up" and "Beam us up, Scotty" (animated, 1973), with print use from 1975.

Beam optics

Beam optics is the branch of accelerator physics that describes the transverse motion of charged particles in beam lines, accelerators, and storage rings using transfer matrices.

Beam position monitor

A beam position monitor (BPM) is a non-intercepting diagnostic device that measures the transverse position of a charged particle beam inside the vacuum chamber of an accelerator or beam line.

Beam position monitoring

Beam position monitoring measures the transverse position of a charged particle beam inside an accelerator or beam line, performed non-invasively by beam position monitors (BPMs), passive electrodes that couple to the beam's electromagnetic field.

Beam propagation method

The beam propagation method (BPM) is a numerical optics technique that simulates light traveling along waveguides by stepping the field forward while solving a paraxial wave equation.

BEAM robotics

BEAM robotics (Biology, Electronics, Aesthetics, Mechanics) is an approach to robot design favoring analog nervous-network circuits over microprocessors, credited to physicist Mark W. Tilden, who built the first BEAM robot in 1989.

Beam search

Beam search is a heuristic search algorithm that keeps only the k most promising partial candidates at each step, commonly used to decode neural sequence models.

Beam splitter

A beam splitter, also called a half-silvered mirror, is an optical device that divides a light beam into two beams, used in interferometers, cameras, projectors, and laser systems.

Sep 19, 2026

Beam Therapeutics

Beam Therapeutics is a clinical-stage biotechnology company in Cambridge, Massachusetts, founded in 2017 by David Liu, Feng Zhang, and Keith Joung to develop base editing medicines.

Beam tilt

Beam tilt is the deliberate tilting of a transmitting antenna's main radiation lobe slightly below the horizontal plane, either mechanically or electrically, so maximum signal reaches the intended service area instead of overshooting it.

Beam tomography

Beam tomography is a wave-propagation imaging method using beams of finite width, used in seismology to image the Earth's crust and mantle and in helioseismology to image the Sun's interior.

Beam-beam effect

The beam-beam effect is the electromagnetic perturbation of one circulating particle beam by the opposing beam at each crossing in a collider, often the main limit on luminosity.

Beam-induced deposition

Beam-induced deposition is a resist-free nanofabrication technique in which a focused electron or ion beam decomposes adsorbed precursor gas, writing nanoscale metal or insulator structures.

Beam-space MIMO

Beam-space MIMO is a MIMO architecture that transforms antenna signals into orthogonal spatial beams, so millimeter-wave massive MIMO systems need far fewer RF chains with little performance loss.

Beam–plasma instability

The beam–plasma instability is a plasma microinstability in which a particle beam streaming through a plasma excites growing waves that scatter and decelerate the beam.

Beamforming

Beamforming, also known as digital beam forming or antenna beamforming, is a signal-processing technique that combines sensor array outputs to enhance signals from one direction while suppressing noise and interference from others.

Beamforming network

A beamforming network (BFN) is a passive microwave feed that distributes a signal to antenna array elements with controlled amplitudes and phases, combining them into directed beams.

Beamforming optimization

Beamforming optimization designs complex weights, one per antenna element, so signals add coherently in desired directions while interference is suppressed; it underpins cellular massive MIMO, radar, and sonar.

BeamNG.drive

BeamNG.drive is a soft-body vehicle simulator by BeamNG GmbH (Bremen), on Steam Early Access since May 2015, using node-beam physics at 2 kHz; v0.39 (2026) overhauled graphics and UI, and a PS5 version arrives in 2026.