• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Proceedings of ESMATS 2011: 14th European space mechanisms and tribology symposium.;Proceedings of ESMATS 2011: 14th European space mechanisms and tribology symposium. >ALIGNMENT AND TESTING OF THE NIRSpec FILTER- AND GRATING WHEEL ASSEMBLY
【24h】

ALIGNMENT AND TESTING OF THE NIRSpec FILTER- AND GRATING WHEEL ASSEMBLY

机译：NIRSpec过滤网和格栅轮总成的校准和测试

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to perform spectrometric measurements, thernNear Infrared Spectrometer (NIRSpec) aboard thernJames Webb Space Telescope (JWST) needs the abilityrnto select various spectral band widths and split these uprninto its comprised wavelengths. These functions arernachieved by the Filter Wheel Assembly (FWA) and thernGrating Wheel Assembly (GWA). The filters of thernFWA select a different bandwidth of the spectrum eachrnwhile the gratings on the GWA yield specific diffractiverncharacteristic for spectral segmentation. A high spectralrnsensitivity as well as the ability to detect the spectra ofrnvarious objects at the same time result in highrnrequirements regarding the positioning accuracy of thernoptics of both mechanisms in order to link the detectedrnspectra to the 2-dimensional images of the observedrnobjects.rnThe NIRSpec mechanism including FWA and GWArnwill operate at temperature levels below 42K which arernestablished during testing inside of a cryostat. Howeverrnthe alignment and testing of these mechanisms requiresrna lot of thought since there is very limited access to thernitem under test within such a device. Alignment needsrnto be preloaded based on simulations and testing isrnreduced to optical methods and evaluation of electricalrnsignals.rnThis paper describes the methods used for the variousrnalignment steps, the corresponding tests and theirrnprecision of measurement as well as the achievedrnaccuracies in the mechanism performance.
机译：为了执行光谱测量，詹姆斯·韦伯太空望远镜（JWST）上的近红外光谱仪（NIRSpec）需要能够选择各种光谱带宽并将其分解成其组成的波长。这些功能是通过滤光轮组件（FWA）和磨光轮组件（GWA）实现的。 FWA的滤波器分别选择不同的光谱带宽，而GWA上的光栅产生用于光谱分割的特定衍射特性。高光谱灵敏度以及同时检测各种物体的光谱的能力导致对这两种机制的热镜定位精度的要求很高，以便将检测到的光谱链接到观察到的物体的二维图像。 FWA和GWArn将在低温恒温器内部测试期间确定的低于42K的温度下运行。然而，这些机构的对准和测试需要很多思考，因为在这样的设备中对被测项目的访问非常有限。对准需要基于模拟进行预加载，并简化为光学方法和电气信号评估的测试。本文介绍了各种对准步骤所使用的方法，相应的测试及其测量精度，以及机构性能所达到的精度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号