Calibration system with cryogenically-cooled loads for cosmic microwave background polarization detectors.

@article{Hasegawa2011CalibrationSW,
  title={Calibration system with cryogenically-cooled loads for cosmic microwave background polarization detectors.},
  author={M. Hasegawa and Osamu Tajima and Yuji Chinone and Masashi Hazumi and Koji Ishidoshiro and Masaru Nagai},
  journal={The Review of scientific instruments},
  year={2011},
  volume={82 5},
  pages={054501}
}
We present a novel system to calibrate millimeter-wave polarimeters for cosmic microwave background (CMB) polarization measurements. This technique is an extension of the conventional metal mirror rotation approach, however, it employs cryogenically-cooled blackbody absorbers. The primary advantage of this system is that it can generate a slightly polarized signal (∼100 mK) in the laboratory; this is at a similar level to that measured by ground-based CMB polarization experiments observing a… CONTINUE READING