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Experimental performance comparison of two polarimeter techniques for CMB applications

机译:两种用于CMB应用的旋光仪技术的实验性能比较

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Polarisation modulators are necessary for present and next generations of CMB polarisation experiments. Because of thevery faint B-mode signal expected, these instruments have not only to be extremely sensitive but also to have low andwell-characterised systematic effects.The beam RF characterisation in the W-band (75-110 GHz) of two polarimeter pixels using the same corrugated horn hasbeen performed using two different modulators: a waveguide rotator modulator and a quasi-optical half-wave plate. Coandcross-polarisation beam measurements are presented together with the systematic effects introduced by bothmodulators.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
机译:偏振调制器是当前和下一代CMB偏振实验所必需的。由于预期的B模式信号非常微弱,因此这些仪器不仅必须具有极高的灵敏度,而且还必须具有良好的低系统特性。两个偏振计像素的W波段(75-110 GHz)的光束RF表征使用使用两个不同的调制器执行了相同的波纹状号筒:波导旋转调制器和准光学半波片。共极化偏振光束的测量结果以及两个调制器引入的系统效果都将被介绍。©(2012)COPYRIGHT光电仪器工程师协会(SPIE)。摘要的下载仅允许个人使用。

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