Abstract
A PYROELECTRIC thermal detector having a high-frequency response of 5 µsec. has been made and has been used to measure the total-radiation loss from a high-temperature gas discharge. This device, which can easily be improved to give a time-constant of better than 1 µsec., should be compared with the more conventional bolometer types having, at best, a response of about 50 µsec.1. It consists of a piece of spontaneously polarized ferroelectric material (in this case barium titanate), having electrodes on opposite faces (Fig. 1). The electrode on one face of the ferroelectric is a film of conducting black used to absorb the pulse of incident radiation (and hence the device has a wide spectral response).
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References
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COOPER, J. A Fast Response Total-Radiation Detector. Nature 194, 269–271 (1962). https://doi.org/10.1038/194269a0
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DOI: https://doi.org/10.1038/194269a0
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