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24 February 2003 Optomechanical design of the cosmic hot interstellar plasma spectrometer (CHIPS)
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CHIPS is a NASA UNEX mission designed for diffuse background spectroscopy in the EUV bandpass from 90-260Å. The spectrometer is optimized for peak resolution near 170 Å, in order to study diffuse emissions from cooling million degree plasma. Details of local bubble thermal pressure, spatial distribution, and ionization history are the goals of CHIPS observations. We discuss the opto-mechanical design adopted to meet the throughput, signal to noise, and spectral resolution requirements within the mass, volume, and budgetary constraints of a UNEX Delta-II secondary payload. Mechanical tolerance requirements for the six spectrometer channels are discussed, along with details of the lightweight mounting scheme for CHIPS diffraction gratings, front cover slit mechanisms and thermal design. Finally, visible light and vacuum alignment techniques are discussed, as well as with methods employed to minimize stray light.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael Sholl, William Donakowski, Martin M. Sirk, Tobias Clauss, Michael L. Lampton, Jerry Edelstein, and Mark Hurwitz "Optomechanical design of the cosmic hot interstellar plasma spectrometer (CHIPS)", Proc. SPIE 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation, (24 February 2003);

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