| 摘要 |
<p>A novel nuclear magnetic resonance (NMR) probe design for operating in a borehole to obtaining the NMR characteristics of a region of interest adjacent the borehole, characterized by a main RF antenna assembly (202) a main magnet assembly (201) and a spoilercompensing antenna assembly (205). The spoiler/compensating antenna performs as an active shield for generating a resultant RF field that forcefully mismatches the static magnetic inside the borehole and does not substantially affects the RF field or antenna sensitivity in the region of interest (105).</p> |
