论文标题
构建用于毫米波应用的大直径反射半波板调节器
Construction of a Large Diameter Reflective Half-Wave Plate Modulator for Millimeter Wave Applications
论文作者
论文摘要
极化调制是一种强大的技术，可以通过从占主导地位的慢速系统漂移和非偏振前景的极化信号的区别来区分来提高测量值的稳定性。此外，当将尽可能靠近天空靠近时，调制可以减少仪器极化的系统错误。在这项工作中，我们介绍了新的60 cm直径半波板（RHWP）极化调制器的设计和初步驱动系统实验室性能。波板由位于平面镜前的电线阵列组成。使用\ mbox {50 $μ$ m}直径的\ mbox {175 $μ$ m}间距，波板适用于在毫米波长范围内操作，并在毫米的波长范围内具有平坦的电线，并平行于镜像，可容纳一小部分波长。提出的设计针对77--108 GHz范围。调制是通过使用主动控制的伺服电动机的自定义旋转驱动器的波板旋转进行的。
Polarization modulation is a powerful technique to increase the stability of measurements by enabling the distinction of a polarized signal from dominant slow system drifts and unpolarized foregrounds. Furthermore, when placed as close to the sky as possible, modulation can reduce systematic errors from instrument polarization. In this work, we introduce the design and preliminary drive system laboratory performance of a new 60 cm diameter reflective half-wave plate (RHWP) polarization modulator. The wave plate consists of a wire array situated in front of a flat mirror. Using \mbox{50 $μ$m} diameter wires with \mbox{175 $μ$m} spacing, the wave plate will be suitable for operation in the millimeter wavelength range with flatness of the wires and parallelism to the mirror held to a small fraction of a wavelength. The presented design targets the 77--108 GHz range. Modulation is performed by a rotation of the wave plate with a custom rotary drive utilizing an actively controlled servo motor.
