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Radiation beam calorimetric power measurement system

Patent ·
OSTI ID:868503
 [1];  [2];  [3];  [4]
  1. Livermore, CA
  2. Pleasanton, CA
  3. Ripon, CA
  4. Dublin, CA
+ Show Author Affiliations

A radiation beam calorimetric power measurement system for measuring the average power of a beam such as a laser beam, including a calorimeter configured to operate over a wide range of coolant flow rates and being cooled by continuously flowing coolant for absorbing light from a laser beam to convert the laser beam energy into heat. The system further includes a flow meter for measuring the coolant flow in the calorimeter and a pair of thermistors for measuring the temperature difference between the coolant inputs and outputs to the calorimeter. The system also includes a microprocessor for processing the measured coolant flow rate and the measured temperature difference to determine the average power of the laser beam.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
DOE Contract Number:
W-7405-ENG-48
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 5156459
OSTI ID:
868503
Country of Publication:
United States
Language:
English

References (2)

A flow calorimetric method of determining electron beam energy (and for dose-rate measurement) journal March 1976
Absolute Water Flow Calorimeter for the Measurement of Intense Beams of Radiant Energy journal July 1954

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/374/324/
absorbing
absorbing light
average
average power
beam
beam calorimetric
beam energy
calorimeter
calorimetric
calorimetric power
configured
continuously
continuously flowing
convert
coolant
coolant flow
cooled
determine
difference
energy
flow
flow meter
flow rate
flow rates
flowing
flowing coolant
heat
including
inputs
laser
laser beam
light
measured
measured temperature
measurement
measuring
meter
microprocessor
operate
outputs
pair
power
power measurement
processing
radiation
radiation beam
range
rate
rates
temperature
temperature difference
thermistors
wide
wide range