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lc tuning circuit  (Magritek Ltd)
90
Magritek Ltd lc tuning circuit
Expanded schematic of the <t>homebuilt</t> 9.81 GHz TE102 resonant microwave cavity. The screw holes and shim coils are not shown for clarity. Panel (A) shows the configuration for a fixed resonant frequency, suitable if the magnetic field can be varied. Panel (B) shows the changes required for a variable resonance frequency cavity, if hyperpolarization in a fixed magnetic field is desired. The variable-frequency short is placed inside the waveguide extension, which then replaces the fixed-frequency short present in (A). The rest of the pieces are unchanged. Panel (C) gives the dimensions for the cylindrical portion of the variable-frequency short. The ¼-32 threads on the cylindrical portion and the threaded hole in the attached plate allow for rotation of the cylindrical portion against the plate to adjust the position of the short inside the waveguide extension, thereby changing the length and frequency of the cavity.
Lc Tuning Circuit, supplied by Magritek Ltd, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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lc tuning circuit - by Bioz Stars, 2026-04
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Expanded schematic of the homebuilt 9.81 GHz TE102 resonant microwave cavity. The screw holes and shim coils are not shown for clarity. Panel (A) shows the configuration for a fixed resonant frequency, suitable if the magnetic field can be varied. Panel (B) shows the changes required for a variable resonance frequency cavity, if hyperpolarization in a fixed magnetic field is desired. The variable-frequency short is placed inside the waveguide extension, which then replaces the fixed-frequency short present in (A). The rest of the pieces are unchanged. Panel (C) gives the dimensions for the cylindrical portion of the variable-frequency short. The ¼-32 threads on the cylindrical portion and the threaded hole in the attached plate allow for rotation of the cylindrical portion against the plate to adjust the position of the short inside the waveguide extension, thereby changing the length and frequency of the cavity.

Journal: Journal of magnetic resonance (San Diego, Calif. : 1997)

Article Title: Continuous flow Overhauser dynamic nuclear polarization of water in the fringe field of a clinical magnetic resonance imaging system for authentic image contrast

doi: 10.1016/j.jmr.2010.05.008

Figure Lengend Snippet: Expanded schematic of the homebuilt 9.81 GHz TE102 resonant microwave cavity. The screw holes and shim coils are not shown for clarity. Panel (A) shows the configuration for a fixed resonant frequency, suitable if the magnetic field can be varied. Panel (B) shows the changes required for a variable resonance frequency cavity, if hyperpolarization in a fixed magnetic field is desired. The variable-frequency short is placed inside the waveguide extension, which then replaces the fixed-frequency short present in (A). The rest of the pieces are unchanged. Panel (C) gives the dimensions for the cylindrical portion of the variable-frequency short. The ¼-32 threads on the cylindrical portion and the threaded hole in the attached plate allow for rotation of the cylindrical portion against the plate to adjust the position of the short inside the waveguide extension, thereby changing the length and frequency of the cavity.

Article Snippet: The RF coil was connected to a homebuilt LC tuning circuit then a Kea NMR spectrometer (Magritek Ltd., New Zealand) and external RF amplifier (BT00250-Beta, Tomco Technologies, Australia), as shown in .

Techniques: