Classical and modern power spectrum estimation for tune measurement in CSNS RCS

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YANG Xiao-Yu, XU Tao-Guang, FU Shi-Nian, ZENG Lei and BIAN Xiao-Juan. Classical and modern power spectrum estimation for tune measurement in CSNS RCS[J]. Chinese Physics C, 2013, 37(11): 117003. doi: 10.1088/1674-1137/37/11/117003
YANG Xiao-Yu, XU Tao-Guang, FU Shi-Nian, ZENG Lei and BIAN Xiao-Juan. Classical and modern power spectrum estimation for tune measurement in CSNS RCS[J]. Chinese Physics C, 2013, 37(11): 117003.  doi: 10.1088/1674-1137/37/11/117003 shu
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Received: 2013-01-10
Revised: 2013-02-17
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Classical and modern power spectrum estimation for tune measurement in CSNS RCS

Abstract: Precise measurement of betatron tune is required for good operating condition of CSNS RCS. The fractional part of betatron tune is important and it can be measured by analyzing the signals of beam position from the appointed BPM. Usually these signals are contaminated during the acquisition process,therefore several power spectrum methods are used to improve the frequency resolution. In this article classical and modern power spectrum methods are used. In order to compare their performance,the results of simulation data and IQT data from J-PARC RCS are discussed. It is shown that modern power spectrum estimation has better performance than the classical ones,though the calculation is more complex.

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