Active compensation of rf-pulse transients |
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Authors: | Kazuyuki Takeda Yutaka Tabuchi Makoto Negoro Masahiro Kitagawa |
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Institution: | aDivision of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo, 606-8502 Kyoto, Japan;bGraduate School of Engineering Science, Osaka University, 560-8531 Toyonaka, Japan |
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Abstract: | A new approach to compensate rf-pulse transients is proposed. Based on the idea of the response theory of a linear system, a formula is derived to obtain the required excitation voltage profile back from the intended target rf-pulse shape. The validity of the formula is experimentally confirmed by monitoring the rf-field created inside the sample coil with a pickup coil. Since this approach realizes accurate rf-pulse shapes without reducing the Q-factor of the tank circuit of the probe, it can be used not only to suppress the transient tail of the rf-pulse, but also as a general concept for accurate rf-pulsing. |
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Keywords: | Pulse transient Linear system Impulse response Laplace transformation |
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