Method and apparatus for reading thermoluminescent phosphors

Patent · Tue Jan 20 04:00:00 EST 1987

OSTI ID:7038594

Braunlich, P F; Tetzlaff, W

A thermoluminescent phosphor reading apparatus is described for reading the level of ionization existing in a thermoluminescent phosphor as a result of exposure of the phosphor to ionizing radiation, comprising: laser beam source means for generating and emitting a laser beam; the laser beam source means being capable of modulation to control power of the laser beam; laser beam power detection means for measuring the power of the laser beam at least once during an exposure period during which the laser beam is directed upon the thermoluminscent phosphor; phosphor positioning means for holding the thermoluminescent phosphor in position to be exposed to the laser beam; laser power control means for rapidly and adjustably modulating the power output of the laser beam source means to maintain the power of the emitted laser beam at a desired level; shutter means positioned to control exposure of the thermoluminescent phosphor held by the phosphor positioning means, without interfering with operation of the laser beam power detection means; and thermoluminescent emission measuring means for measuring the output of any thermoluminescent emission occurring when the thermoluminescent phosphor is heated by the laser beam.

• Assignee: NOV; NOV-87-046019; EDB-87-057352
• Patent Number(s): US 4638163
• OSTI ID: 7038594
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ELECTROMAGNETIC RADIATION
EMISSION
HEATING
IONIZATION
IONIZING RADIATIONS
LASER RADIATION
LASER-RADIATION HEATING
LUMINESCENCE
MEASURING METHODS
MODULATION
PHOSPHORS
PLASMA HEATING
POSITIONING
RADIATIONS
READOUT SYSTEMS
THERMOLUMINESCENCE