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US 7,125,163 B2Granted
Simple high accuracy high energy calorimeter
AssigneeThe Boeing Company
InventorsLynne C. Eigler, Yan S. Tam, Youssef Kohanzadeh
Life of this patent
Estimating the term…
Abstract
An exemplary calorimeter includes a body configured to capture radiation generated by a source of the radiation, such as without limitation a laser, and absorb energy from the captured radiation. The calorimeter is simple to manufacture, operate, and maintain and is compact, highly accurate, able to withstand high power beams, and self-calibrating. NIST traceable electrical wires are used for the measurement. No fluids are used during measurements of the input radiation. A simple built in fluid or gaseous cooling system may be used post-measurement to reset the calorimeter temperature back to ambient for repeated measurement capability.
Claims30
A calorimeter comprising:
- a body configured to admit and capture radiation, the body being further configured to absorb energy from the captured radiation, the body including:
- a first chamber having a first axis and being configured to receive a beam of radiation, the first chamber being further configured to absorb the beam of radiation;
- and
- a second chamber having a second axis that is not collinear with the first axis, the second chamber being configured to receive at least a portion of the beam of radiation, the second chamber being further configured to further absorb at least the portion of the beam of radiation, such that substantially all of the radiation is absorbed;
- a temperature sensor attached over a substantial portion of the body in thermal communication with a substantial portion of the body, the temperature sensor being configured to detect a change in temperature of a substantial portion of the body responsive to absorption of the captured radiation;
- and
- a cooling system configured to cool the body from temperatures elevated responsive to absorption of the captured radiation.
4 more elements
A calorimeter comprising:
- a body configured to admit and capture radiation, the body being further configured to absorb energy from the captured radiation, the body including:
- a first chamber having a first axis and being configured to receive a beam of radiation, the first chamber being further configured to absorb the beam of radiation;
- and
- a second chamber having a second axis that is not collinear with the first axis, the second chamber being configured to receive at least a portion of the beam of radiation, the second chamber being further configured to further absorb at least the portion of the beam of radiation, such that substantially all of the radiation is absorbed;
- a wire having resistance that varies with temperature, the wire being attached over a substantial portion of the body in thermal communication with a substantial portion of the body, the wire being configured to detect a change in temperature of a substantial portion of the body responsive to absorption of the captured radiation;
- a multimeter coupled to detect resistance of the wire;
- a processor coupled to receive detected resistance of the wire, the processor having a first component configured to convert detected resistance of the wire to temperature of the body;
- and
- a cooling system configured to cool the body from temperatures elevated responsive to absorption of the captured radiation.
6 more elements
A calorimeter comprising:
- a body configured to admit and capture radiation, the body being further configured to absorb energy from the captured radiation, the body including:
- a first chamber having a first axis and being configured to receive a beam of radiation, the first chamber being further configured to absorb the beam of radiation;
- and
- a second chamber having a second axis that is not collinear with the first axis, the second chamber being configured to receive at least a portion of the beam of radiation, the second chamber being further configured to further absorb at least the portion of the beam of radiation, such that substantially all of the radiation is absorbed;
- a temperature sensor attached over a substantial portion of the body in thermal communication with a substantial portion of the body, the temperature sensor being configured to detect a change in temperature of a substantial portion of the body responsive to absorption of the captured radiation;
- and
- a cooling system configured to cool the body from temperatures elevated responsive to absorption of the captured radiation, the cooling system including a plurality of channels defined in thermal communication within an interior of the body, the plurality of channels being connectable to a source of cooling fluid.
4 more elements
Dependencies are inferred from the claim text.