Information on Surface description

The following description is taken from Simon C.G., Hunter J.L., Wortman J.J., Griffis D.P., ION MICROPROBE ANALYSES OF IMPACT FEATURES ON INTERPLANETARY DUST EXPERIMENT SENSOR SURFACES, in: LDEF-69 Months in Space, NASA CP-3134, 1992, pp. 529-548

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The IDE sensors are 2 inch (5.08 cm) diameter Metal-Oxide-Silicon (MOS) capacitor structures. The detectors were formed by growing either a 0.4 micrometer or 1.0 micrometer thick silicon dioxide layer on a 250 micrometer thick, B-doped polished silicon wafer (>0.99999). The top metal contact was formed by physical vapor deposition of approximately 1000 Angstroms of aluminum (>0.9999). Aluminum was also vapor deposited on the backside of the wafers to form the contact with the p-type Si substrate. Gold wires were then bonded to the front and back Al layers and used to connect the detectors to the circuits. The complete wafers (IDE detectors) were then mounted on Al frames by bonding the backsides with silicon RTV.
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A more detailed description is given in Kassel P.C., Wortman J.J., METAL-OXIDE-SILICON CAPACITOR DETECTORS FOR MEASURING MICROMETEOROID AND SPACE DEBRIS FLUX, avaiable in this archive.

A0187-1 Chemistry of Micrometeorites

The following description is taken from Hörz F., Bernhard R.P., Warren J., See T.H., Brownlee D.E., Laurance M.R., Messenger S., Peterson R.B., PRELIMINARY ANALYSIS OF LDEF INSTRUMENT A0187-1 "CHEMISTRY OF MICROMETEOROIDS EXPERIMENT", in: LDEF-69 Months in Space, NASA CP-3134, 1992, pp. 487-501

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Active Instrument (Tray A03)

The active instrument occupied an entire 12'' deep tray located in Bay A03 and exposed seven sheets (approx. 0.5 mm thick) of pure gold (>99.99% Au), each sheet measuring approximately 57 x 20 cm (Figure 1a).
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The following description is based on observations made during the SIMS analyses at NCSU-AIF:

The gold samples were obviously contaminated during their manufacturing process, resulting in a multi-element contamination layer under a 1-2 micrometer thick surface Au layer. Arsenic was a tracer contaminant for this layer.

S1003 Ion-Beam-Textured and Coated Surfaces Experiment

The following description is taken from Mirtich M.J., Rutledge S.K., Banks B.A., De Vries C., Merrow J.E., CHARACTERISTICS OF HYPERVELOCITY IMPACT CRATERS ON LDEF EXPERIMENT S1003 AND IMPLICATIONS OF SMALL PARTICLE IMPACTS ON REFLECTIVE SURFACES, in: LDEF-69 Months in Space, NASA CP-3194, 1993, pp. 431-451

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The S1003 tray cover was (alumigold coated, [chromic conversion process] Al type 6061 T6), 48 cm x 48 cm. ..., the tray was sectioned into 690 pieces, 2 cm x 2 cm, for crater documentation.
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