Abstract
A new-type disk antenna has been developed to search for continuous gravitational waves emitted from millisecond and submillisecond pulsars. The antenna not only has a wide tunable range of the eigenfrequency that covers down to almost half of the original frequency of the quadrupole mode, but also is easily tuned to an objective frequency with an accuracy of 4×10−5 at 4.2 K. The mechanical quality factor has reached 3.0×107 at 4.2 K in an antenna made of Al5056.
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