Engineering topics
Publications and source records attributed to Caruso, A. J..
The detailed optical design of the Solar Maximum Mission-Ultraviolet Spectrometer and Polarimeter is discussed in conjunction with the scientific objectives that led to the design. The instrument consists of a 1.8-m effective focal length aplanatic Gregorian telescope followed by a 1-m Ebert spectrometer. The design of the Stokes polarimeter is also discussed.
High frequency plane gratings (3500 and 3600 gr/mm) have been holographically ruled and blazed for the VUV spectral region. All gratings were coated with 70 nm Al + 25 nm MgF2. Absolute unpolarized and S- and P-plane polarization efficiencies have been measured for the first and second orders in the 120- to 450-nm spectral region at 18.5 and 30 deg angles of deviation. For deep grooves, anomalous features are more pronounced for the P-plane polarization efficiency than for the S-plane polarization efficiency. Holographic gratings can be tailored to produce high polarization or low polarization in the VUV. For comparison, efficiencies and polarization of the best conventional high frequency gratings were also determined. Measurements show that scattered light is significantly lower for holographic gratings in the VUV when compared with the conventional gratings.
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Features of technique: major reduction in cost of fabrication; gratings exhibit low stray or scattered radiation, improve signal noise ratio, and eliminate false spectral-lines; gratings can be fabricated free of optical aberrations, with high groove frequencies, and on practically any surface geometry; and fabrication time has been reduced.
Modified sorption trap for use in high vacuum systems contains provisions for online regeneration of sorbent material. Trap is so constructed that it has a number of encapsulated resistance heaters and a valving and pumping device for removing gases from heated sorbing material. Excessive downtime is eliminated with this trap.
Describing sorption vacuum trap having housing with group of reentrant wall portions projecting into internal gas-pervious container filled with gas and vapor sorbent material
Autoinized resonance transitions of He at 206.2- 192.2 A using He continuum produced by capillary spark, also producing He II line spectra
Polypropylene preparation and evaluation as soft X ray detector window material
Multichannel photoionization chamber to measure absorption, yield and light intensity of gases in vacuum UV
Flyby infrared absorption measurements in Martian atmosphere for determination of profiles of carbon dioxide, particulate matter and water vapor
Absolute measurements of K X-ray quantum yields resulting from deuteron bombardment of thick targets containing carbon and boron
Multiple element soft X-ray source for study of soft X-ray region of electromagnetic spectrum, obtaining absolute photon yield of carbon K and boron K
A rotating mount with target elements positioned independently for direct electron bombardment produces soft X ray radiation with a wide range of characteristics. The device may be used to study solar radiation from a satellite.
Measurement of absolute photon yield of carbon K radiation produced by electron bombardment for calibration of grazing incidence grating spectrometer