Publication Date:
2018-02-22
Description:
This paper investigates the potential for 83.4 nm imaging of the plasmaspheric dense oxygen torus, using simple models for core plasma density and composition to constrain a simulated image code. We derive the requirements for plasmaspheric O + imaging, and the expected performance of an imager based on a slightly modified version of the IMAGE EUV camera. We find that such an imager can achieve a sensitivity of 0.69(sRpixel) −1 , sufficient to capture the dense torus 83.4 nm signal with 25-min integration time. The background rejection ratios for this design are 1.5 × 10 −4 at 58.4 nm and 7.4 × 10 −8 for Lyman- α . We discuss the effects of ion temperature and motion, and O ++ glow. We compute simulated O + images of the formation and global distribution of the dense torus. We also examine the possibility of direct observation of oxygen outflow from the ionosphere.
Print ISSN:
0148-0227
Topics:
Geosciences
,
Physics
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