Analysis of the polarimetric performance of the HARPS3 Cassegrain adaptor unit

Analysis of the polarimetric performance of the HARPS3 Cassegrain adaptor unit
复制标题

HARPS3卡塞格伦适配器单元的偏振性能分析

DOI:
10.1117/12.2312535
复制
发表时间:
2018
期刊:
--
影响因子:
--
通讯作者:
Thompson S
Thompson S
中科院分区:
--
文献类型:
--
作者:
Thompson S

文献摘要

参考文献

被引文献

相似文献

高精度径向速度行星搜索器(HARPS3)的第三个版本是为一个为期十年的计划而建造的,目的是在附近的恒星上达到10厘米/秒的径向速度精度,以搜索类地行星。HARPS3将于2021年在拉帕尔马的2.54米艾萨克牛顿望远镜上投入使用。与它的前辈相比,主要的变化之一是新型的双光束卡塞格伦焦点,具有稳定的光束馈入HARPS3光谱仪和可插入的偏振亚单元。这个偏振亚单元使HARPS3能够直接测量恒星活动特征,这对于在寻找类地行星时纠正活动引起的径向速度抖动很有用。该亚单元由超消色差聚合物四分之一和半波缓速器组成,分别用于圆形和线性偏振,旨在抑制极化条纹,以及基于线栅设计的新型偏振分束器,将两束偏振光束分开30毫米,并馈送两根独立的科学纤维。双光束交换实现与HARPS3光谱仪的极端稳定性相结合,使明亮恒星的偏振灵敏度达到10−5。这种系统的主要挑战之一是仪器极化效应的表征,这限制了极化观测模式的极化精度。通过设计和表征该子系统,并通过先发制人地减轻可能的噪声源,我们可以最小化偏振子单元的噪声特性,从而实现精确的观测。本文介绍了安装在HARPS3光谱仪卡塞格伦适配器单元中的偏振单元的设计、实现、组装、对准和测试
The third version of the High Accuracy Radial velocity Planet Searcher (HARPS3) instrument is built for a ten-year programme aimed at achieving 10 cm/sec radial velocity precision on nearby stars to search for Earth-like planets. HARPS3 will be commissioned on the to-be-roboticized 2.54-m Isaac Newton Telescope at La Palma in 2021. One of the main changes compared to its predecessors is the novel dual-beam Cassegrain focus, featuring a stabilised beam feed into the HARPS3 spectrograph and an insertable polarimetric sub-unit. This polarimetric sub-unit enables HARPS3 to directly measure stellar activity signatures, which can be useful for correcting activity-induced radial velocity jitter in the search for Earth-like planets. The sub-unit consists of superachromatic polymer quarter- and half-wave retarders for circular and linear polarizations respectively, designed to suppress polarized fringing, and a novel polarimetric beam splitter based on a wire-grid design, separating the two polarimetric beams by 30 mm and feeding two separate science fibers. The dual-beam exchange implementation in combination with the extreme stability of the HARPS3 spectrograph enables a polarimetric sensitivity of 10−5on bright stars. One of the main challenges of such a system is in the characterization of instrumental polarization effects which limit the polarimetric accuracy of the polarimetric observing mode. By design and characterization of this subsystem and by pre-emptively mitigating possible noise sources, we can minimize the noise characteristics of the polarization sub-unit to allow for precise observations. In this paper we report on the design, realization, assembly, alignment, and testing of the polarimetric unit to be installed in the Cassegrain Adaptor Unit of the HARPS3 spectrograph
HARPS-North@TNG 旋光计
DOI: --
发表时间: 2016
期刊: Astronomical Telescopes + Instrumentation
影响因子: --
作者:
F. Leone;M. Cecconi;R. Cosentino;A. Ghedina;M. Giarrusso;M. Hernández Díaz;Manuel Gonzalez;M. Munari;H. Pérez Ventura;L. Riverol;J. J. San Juan Gómez;S. Scuderi
通讯作者: S. Scuderi
校正 ESPaDOnS 分光偏振计中的偏振串扰
DOI: --
发表时间: 2010
期刊: Astronomical Telescopes + Instrumentation
影响因子: --
作者:
G. Barrick;T. Benedict;D. Sabin
通讯作者: D. Sabin
使用断层扫描成像模拟早期 M 矮星的 RV 抖动
DOI: 10.1093/mnras/stw1346
发表时间: 2016
影响因子: 4.8
作者:
'E.M. H'ebrard;J. Donati;X. Delfosse;J. Morin;C. Moutou;I. Boisse
通讯作者: I. Boisse
行星、恒星和恒星系统:第 2 卷:天文技术、软件和数据
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
T. Oswalt;H. Bond
通讯作者: H. Bond
加拿大-法国夏威夷望远镜 SPIRou 分光偏振仪的前端
DOI: --
发表时间: 2012
期刊: Other Conferences
影响因子: --
作者:
L. Parès;J. Donati;M. Dupieux;T. Gharsa;Y. Micheau;M. Bouyé;B. Dubois;G. Gallou;D. Kouach;G. Barrick;S. Wang
通讯作者: S. Wang