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Example research essay topic: Detector Amplifier Hybrids Te Cooled Detector Amplifier Hybrids Dia - 425 words

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Cooling In many cases IR detectors are cooled during use. This cooling effects the spectral response, responsibilty and response speed. Spectral response characteristics of PbS, Pb Se, and HgCdTe (MCT) shift to the long wavelength side with cooling while Ge, In As and In Sb shift to the short wavelength side. Also, note that the response speeds of PbS and Pb Se become slower with cooling. Methods of cooling include thermoelectric cooling and dewar cooling using dry ice, liquid nitrogen, etc. Thermoelectric cooled detector systems include: 1.

Detector head with integral amplifier, Peltier cooler, temperature sensor. 2. Temperature control unit with integral power supply. Nitrogen cooled detector systems include: Detector head with integral amplifier mounted in dewar. Options Available 1. Mount adapters for all Science tech monochromat ors. 2. Computer data acquisition board A/D for use with PC compatible computer.

Standard 12 bit and DC up to 110 KHz frequency. Others available upon request. GE Detectors 0. 8 - 1. 8 Microns Germanium photodiode detectors are designed for operation in the 0. 8 to 1. 8 m range. Included are state-of-the-art detector components, detector / amplifier hybrids, TE cooled and cryogenically cooled modules.

Standard active areas (mm): 0. 1 dia 0. 3 dia 1. 0 dia 2. 0 dia 3. 0 dia 5. 0 dia 10 x 10 GELN- 50. Ge detector in liquid N 2 dewar with integral preamplifier - Spectral range 800 - 1500 nm @ 77 K - Active area: 5 mm - Operating temperature: 77 K. - Responsivity 0. 80 A/W minimum, 0. 9 A/W typical - NEP < 1. 5 x 10 - 15 W/Hz 1 / 2 @ 77 K - Shunt Resistance 10 K Ohm @ 298 K; > 1000 M Ohm @ 77 K - Shunt Capacitance 30000 pF typical - Dewar type: metal, side view. - Dewar holding time: 10 hours. - Dewar size: 6. 75 " height, 2. 5 " diameter. Height (from the bottom) of the detector window: 1. 45 " - Field of View: 60 degrees nominal - Amplifier Dual-Gain Trans impedance - Bandwidth DC- 15 Hz/ DC- 150 Hz Indium Gallium Arsenide Detectors, 0. 9 - 1. 7 Microns (In GaAs) Standard In GaAs photodiode detectors are designed for operation in the 0. 8 to 1. 7 m spectral range. Included are state-of-the-art detector components, detector / amplifier hybrids, TE cooled and cryogenically cooled modules. These units offer better performance than germanium detectors. Standard active areas (mm): 0. 1 dia 0. 3 dia 1. 0 dia 2. 0 dia 3. 0 dia


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Research essay sample on Detector Amplifier Hybrids Te Cooled Detector Amplifier Hybrids Dia

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