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Effects of proton irradiation on glass filter substrates for the Rosetta mission

机译：质子辐照对Rosetta任务的玻璃滤光片基材的影响

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The Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) instrument on board the Rosetta spacecraft, a mission of the European Space Agency to comet P/Wirtanen, includes two cameras for acquiring images of the comet. A set of interference filters deposited upon glass and fused-silica substrates will be added to the cameras for wavelength tuning. For this mission of more than 10/years in an interplanetary environment, the requirement of preserving the optical characteristics of the filters is a critical one. We checked the variation in the transmission of some filter substrates after proton irradiation that simulated the solar wind. To produce a situation that is representative of the interplanetary environment, we irradiated proton fluences at three energies: 1.5×10~(11) protons/cm~(2) at 4 MeV, 1.9×10~(10) protons/cm~(2) at 8 MeV, and 7.1×10~(9) protons/cm~(2) at 18 MeV. Seven substrates were tested: three Suprasil-1; three colored glasses, namely, OG590, KG3, and RG9; and one quartz. In addition, two interference filters were checked. The results obtained show that Suprasil-1 is rather insensitive to this irradiation, whereas very small reductions in transmission, of the order of a few percent, occur for colored glasses. The transmission of these filters was remeasured 2 years after the irradiation, and showed a general decrease in the transmission reduction.
机译：罗塞塔号航天器上的光学，光谱和红外远程成像系统（OSIRIS）仪器是欧洲航天局对P / Wirtanen彗星的任务，其中包括两个用于获取彗星图像的摄像机。沉积在玻璃和熔融石英基板上的一组干涉滤光片将被添加到摄像机中以进行波长调谐。对于在行星际环境中进行10年以上的飞行任务，保持滤光器光学特性的要求至关重要。我们检查了模拟太阳风的质子辐照后某些滤光器基板的透射率变化。为了产生代表行星际环境的情况，我们以4 MeV的1.5×10〜（11）质子/cm~(2)、1.9×10~(10）质子/ cm〜（3）照射了质子注量。 2）在8 MeV下，7.1×10〜（9）质子/ cm〜（2）在18 MeV下。测试了七个基板：三个Suprasil-1;三个三个有色眼镜，分别是OG590，KG3和RG9;和一个石英。另外，检查了两个干涉滤光片。获得的结果表明，Suprasil-1对这种辐射相当不敏感，而有色玻璃的透射率却有很小的降低，仅为百分之几。照射后2年重新测量这些滤光片的透射率，显示透射率降低总体上下降。

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    《Applied optics》 |2003年第19期|共11页
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  • 正文语种 eng
  • 中图分类 光学;
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