TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

CANON IMMERGE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2001-05-28

English

Subject field(s)
  • Seismic Prospecting
  • Geophysics
  • Research and Development (Petroleum Tech.)
DEF

An energy source extensively used in marine seismic surveys. Air under high pressure is abruptly released into the water to generate a seismic wave.

OBS

As the gun is trailed behind a boat, air is released, making a low-frequency popping noise, which penetrates the subsurface rock layers and is reflected by the layers. Sensitive hydrophones receive the reflections and transmit them to recording equipment on the boat.

OBS

Air guns have also been adapted for lowering in a borehole or pushed down into the marsh ... Air guns are also used in small tanks of water which are set on the surface of the ground as a seismic source on land.

French

Domaine(s)
  • Prospection sismique
  • Géophysique
  • Recherche et développement (Technol. pétrol.)
DEF

Source d’ondes acoustiques utilisé en sismique marine.

CONT

Un navire de prospection pétrolière est équipé d’instruments [...] dont le canon à air, ou autre source d’ébranlement pour la sismique, immergé à l'arrière.

CONT

Dans le canon à air le train d’ondes est obtenu par libération brutale de l’air comprimé dans l’eau [...]

CONT

Le canon à air [...] utilise la détente brutale d’air comprimé sous une pression de 150 bar.

OBS

[...] un des appareils les plus employés [...] Un volume d’air de l’ordre de 1,5 décilitre, fortement comprimé, est brutalement libéré dans l’eau et ce sont les oscillations de la bulle ainsi créée qui produisent le signal acoustique, la fréquence de résonance dépendant du volume de gaz, de sa pression initiale et de la profondeur d’immersion du canon.

Key term(s)
  • canon pneumatique

Spanish

Campo(s) temático(s)
  • Prospección sísmica
  • Geofísica
  • Investigación y desarrollo (Tecnología petrolera)
Save record 1

Record 2 1999-06-21

English

Subject field(s)
  • Vacuum Tubes (Electronics)
DEF

An electron gun in which essentially all the flux of the confining magnetic field passes perpendicularly through the emitting surface of the cathode.

French

Domaine(s)
  • Tubes et lampes (Électronique)

Spanish

Campo(s) temático(s)
  • Tubos de vacío (Electrónica)
Save record 2

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