What do a.m. and p.m. stand for?

primary beam

noun, Physics.
See under secondary beam.

secondary beam

noun, Physics.
a beam of particles of one kind selected from the group of particles produced when a beam of particles from an accelerator (primary beam) strikes a target. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for primary beam
  • Plans for the next two years include improved resolution, data collection, and primary beam focusing.
  • If the human holder's hands are in or near the primary beam, then ring badges must also be provided.
  • Accelerators generate ionizing radiation when the primary beam is activated.
  • If procedures require an individual's extremities to be in or near the primary beam, then ring badges should also be used.
  • primary beam transmission through the image receptor support.
  • During fluoroscopic imaging, diagnostic information is carried in the primary beam.
  • X-ray diffraction systems have the capability to cause permanent injury following a brief exposure to the primary beam.
  • Determine timer accuracy at various settings over the useful range, the adequacy of primary beam filtration.
  • All skin doses at newly tabulated locations are lower than the skin dose at the primary beam entrance location.
  • Individual doses estimated based on primary beam location, beam quality and the source-to-skin distance.

Word of the Day

Difficulty index for primary beam

Few English speakers likely know this word

Word Value for primary

Scrabble Words With Friends