This is the Explorer II/Explorer III spacer ring for the top of a cosmic ray payload from the University of Iowa. The object is illustrated near the top of the cylinder in Figure 42 of Ludwig's master thesis. This object is a component from the primary backup payload inventory for early Explorer payloads designed and built by the University of Iowa. This component is original and has been in George Ludwig's possession since it was built in the late 1950s, with the exception of intervals when the components were used at JPL. Donated by Dr. George Ludwig in 2006.
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Display Status
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin
United States of America
Type
INSTRUMENTS-Scientific
Manufacturer
Dr. George H. Ludwig, University of Iowa Physics Department
Dimensions
3-D: 15.9 × 15.9 × 3.2cm (6 1/4 × 6 1/4 × 1 1/4 in.)
Materials
Unknown Metal
Synthetic
Coating
Inventory Number
A20060086004
Credit Line
Designed and Donated by Dr. George H. Ludwig.
Data Source
National Air and Space Museum
Restrictions & Rights
Usage conditions apply
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