TERMIUM Plus®

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ELECTRONIC DOSIMETER [4 records]

Record 1 2016-11-30

English

Subject field(s)
  • Measuring Instruments (Engineering)
  • Scientific Instruments
  • Radiation Protection
OBS

Electronic pocket dosimeter.... Small, light-weight portable radiation measurement apparatus provides accurate quantitative measurement of radiation dosage and dosage rates. Such apparatus, referred to as a dosimeter, is housed in a ruggedized housing that is only about 1/2 the volume of a package of cigarettes, may easily be clipped to clothing or carried in a shirt pocket, and is powered by a conventional alkaline AA-sized battery. Included in the housing are a geiger tube for detecting radiation, a high voltage power supply for providing power to the geiger tube, a counting circuit for counting geiger pulses generated by the geiger tube, a microprocessor circuit for processing the geiger pulses in accordance with a prescribed program to determine the dose or dosage rate to which the geiger tube has been exposed, and a digital display that displays the dosage rates thus determined.

OBS

alarm pocket dosimeter; APD: term and abbreviation extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.

French

Domaine(s)
  • Instruments de mesure (Ingénierie)
  • Instruments scientifiques
  • Radioprotection
OBS

dosimètre de poche à alarme : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.

Spanish

Save record 1

Record 2 2003-06-17

English

Subject field(s)
  • Orbital Stations
  • Research Experiments in Space
CONT

Extra Vehicular Activity Radiation Monitor... The purpose of EVARM is to carry out flight experiments to investigate and characterize the doses received by different parts of an astronauts body(e. g., skin, eyes, and blood-forming organs) during an EVA. The doses will be analyzed with respect to the time and position of the EVA as well as the orbit, altitude, and attitude of the Station. A relatively new type of electronic radiation dosimeter, the Metal Oxide Semiconductor Field Effect Transistor(MOSFET) will be used to collect dose measurements.

CONT

EVARM is designed for use with the NASA Extravehicular Mobility Unit, or spacesuit, worn by both Space Station and Space Shuttle crewmembers during Station operations. The experiment consists of a storage/badge reader unit and 12 badges - a set of three each for up to four spacewalkers. The sets are designated EV-1, EV-2, EV-3 and EV-4, corresponding to the designation of each potential spacewalker. When not in use, the badges are placed in the storage-reader box, which is stored in the Human Research Facility payload rack. The badge contains a silicon chip specially designed by Thomson-Nielsen - called a Metal Oxide Silicon Field Effect Transistor (MOSFET) - that continuously measures total radiation dosage and a connector that plugs into the badge reader. The reader that can download badge is shown placed in a pocket in the lower left leg of an astronaut liquid cooling garment. Badges also are placed in the front torso and fabric communications cap of the spacesuit undergarment (NASA/JSC). During normal operations, the Station crew will record the background radiation dosage on each badge and transmit it to the ground every week. Shortly before a spacewalk by Station or Shuttle crew members, the crew will measure the radiation dosage of each badge to be used in the spacewalk. A set of three badges will be inserted into pockets sewn into the front torso and front leg areas of the liquid cooling undergarment and the top of the fabric communications cap of each spacesuit. Those locations were selected because of the radiation hazard to sensitive soft tissues such as eyes and internal organs, as well as the hazard to the skin on the arms and legs, which are not as well shielded as the torso. Shortly after the spacewalk, the crew will plug each badge set into the badge reader. They will later transfer the data to the Human Research Facility laptop computer for transmission to the payload team on the ground.

OBS

extra vehicular activity radiation monitor; EVARM: term and abbreviation officially approved by the International Space Station official approval Group (ISSOAG).

French

Domaine(s)
  • Stations orbitales
  • Travaux de recherche dans l'espace
CONT

[...] l'expérience des dosimètres (EVARM pour Extra-Vehicular Activity Radiation Monitor). [...] EVARM permettra de mesurer l'intensité du rayonnement auquel sont soumis les astronautes pendant les sorties extravéhiculaires (EVA). Pour mesurer l'exposition aux rayonnements uniquement pendant les sorties extravéhiculaires, les astronautes seront équipés de petits dispositifs ou badges électroniques à l'intérieur de leur combinaison EVA. Ces dispositifs enregistreront l'intensité du rayonnement à divers endroits sur le corps des astronautes pendant qu'ils travaillent à l'extérieur de la navette ou de la Station spatiale internationale.

OBS

dosimètre pour activités extravéhiculaires; EVARM : terme et abréviation uniformisés par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).

Spanish

Save record 2

Record 3 - external organization data 2000-03-29

English

Subject field(s)
  • Measuring Instruments (Engineering)
  • Scientific Instruments
  • Compartment - Canadian Nuclear Safety Commission
DEF

A small electronic instrument that a person can wear. The dosimeter will sound an alarm when a high radiation dose rate is encountered or when a certain radiation dose has been exceeded.

French

Domaine(s)
  • Instruments de mesure (Ingénierie)
  • Instruments scientifiques
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

Appareil électronique, porté par une personne, qui émet un signal sonore lorsque le débit de dose est élevé ou que la dose de rayonnement absorbée atteint une intensité prédéterminée.

Spanish

Save record 3

Record 4 1999-06-30

English

Subject field(s)
  • Optics
CONT

Radiophotoluminescent(RPL) glass is a dosimeter material that will luminesce following an excitation pulse of ultraviolet light if it has been exposed to ionizing radiation. This effect is caused by radiation induced changes in the glass crystalline electronic structure. Although other materials also exhibit this property, silver activated RPL glass has found the greatest application in x and gamma radiation dosimetry. The sensitivity depends on the type and manufacturer selected, and ranges from 0. 01 cGy to several million cGy.

French

Domaine(s)
  • Optique
OBS

radioluminescence : Luminescence due au bombardement par l'énergie rayonnante, et, à l'excitation des atomes d'une substance par une émission radioactive.

Spanish

Save record 4

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