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Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..710..605i&link_type=abstract
ADVANCES IN CRYOGENIC ENGEINEERING: Transactions of the Cryogenic Engineering Conference - CEC. AIP Conference Proceedings, Vol
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Cryogenics, Refrigerators, Low-Temperature Detectors, And Other Low-Temperature Equipment, Heat Conduction, Spaceborne And Space Research Instruments, Apparatus, And Components
Scientific paper
We have conducted a thermal insulation performance test with an EM (electromagnetic) shielding MLI (multi-layer insulator) and have compared its performances with a conventional MLI thermal insulation. The test was done in a vacuum chamber with a liquid nitrogen temperature shroud. The temperatures at various locations in the MLI were measured to obtain their effective emittances. The EM shielding provides an additional layer of copper fabric as an EM shielding layer, inserted in between conventional MLI layers to enhance EM shielding. The shielding MLI will be used for a lunar radar sounder to protect it from noise emitted by other instruments on board of the spacecraft in the SELENE mission, which is a collaboration mission between ISAS and NASDA. The lunar radar sounder has wide-band and highly sensitive radio wave receivers to detect weak signals in a ``noiseless'' environment on the far side of the moon. The desired signals are extremely weak, especially in the range between 1 MHz and 30 MHz. The EM shielding MLI was also tested and confirmed that its shielding effect was desirable in the specified range.
Iida Takahiro
Iijima Yu-ichi
Nakazawa Satoru
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