FPMU
Floating Potential Measurement Unit
In collaboration with Utah State University, SDL developed the Floating Potential Measurement Unit (FPMU) for the NASA Johnson Space Center. The FPMU was installed by ISS crewmembers, during an Extra Vehicular Activity (EVA), on the starboard (Sl) truss of the ISS in early August 2006. The probe is based on past USU/SDL space instruments and incorporates a Floating Potential Probe, multiple Langmuir Probes, and a Plasma Frequency Probe into one sensor suite.
The FPMU program was a fast response effort by SDL to help NASA understand the charging physics of the ISS. The FPMU is used to correct the charging models of the station each time a new section is added to the structure. By providing feedback on the effectiveness of steps taken to control charging, the FPMU will help ensure a safe working environment for the astronauts.
|
FPMU Fact Sheet
SDL's Plasma Capabilities