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Design and operation of a highly sensitive and accurate laser calorimeter for low-absorbtion materials

机译:用于低吸收材料的高灵敏,精确的激光量热仪的设计和操作

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Abstract: This work surveys techniques to measure the absorption coefficient of low absorption materials. A laser calorimeter is being developed with a sensitivity goal of (1 $POM 0.2)$MUL 10$+$MIN@5$/ cm$+$MIN@1$/ with one watt of laser power using a CO$-2$/ laser (9 $mu m to 11 $mu m), a CO laser (5 $mu m to 8 $mu m), a He-Ne laser (3.39 $mu m), and a pumped OPO tunable laser (2 $mu m to 4 $mu m) in the infrared region. Much attention has been given to the requirements for high sensitivity and to sources of systematic error including stray light. Our laser calorimeter is capable of absolute electrical calibration. Preliminary results for the absorption coefficient of highly transparent potassium chloride (KCl) samples are reported. !26
机译:摘要:这项工作调查了测量低吸收材料吸收系数的技术。正在开发一种激光热量计,其灵敏度目标为(1 $ POM 0.2)$ MUL 10 $ + $ MIN @ 5 $ / cm $ + $ MIN @ 1 $ /,使用CO $ -2 $的功率为一瓦/激光(9微米至11微米),一氧化碳激光器(5微米至8微米),氦氖激光器(3.39微米)和泵浦OPO可调激光器(2微米)。微米至4微米)。对于高灵敏度的要求以及包括杂散光在内的系统误差源已给予了很多关注。我们的激光量热仪能够进行绝对电校准。报告了高度透明的氯化钾(KCl)样品吸收系数的初步结果。 !26

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