Electron spin resonance spectrometer and method for using same
AssigneeNational Institute of Standards and Technology
InventorsJASON P. CAMPBELL, KIN P. CHEUNG, JASON T. RYAN, PATRICK M. LENAHAN
Life of this patent
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Abstract
An electron spin resonance spectrometer includes a bridge to transmit an excitation frequency and to receive a signal frequency; a probe electrically connected to the bridge and comprising: a first conductor in electrical communication with the bridge to transmit the signal frequency to the bridge; a shorting member electrically connected to the first conductor to transmit the excitation frequency to a sample, to produce the signal frequency, and to transmit the signal frequency to the first conductor; and a second conductor electrically connected to the shorting member; and a magnet disposed proximate to the probe.
Claims20
An electron spin resonance spectrometer comprising:
- a bridge to transmit an excitation frequency and to receive a signal frequency;
- a probe electrically connected to the bridge and comprising:
- a first conductor in electrical communication with the bridge to transmit the signal frequency to the bridge;
- a shorting member electrically connected to the first conductor to transmit the excitation frequency to a sample, to produce the signal frequency, and to transmit the signal frequency to the first conductor;
- and
- a second conductor electrically connected to the shorting member;
- and
- a magnet disposed proximate to the probe.
A method for acquiring an electron spin resonance spectrum, the method comprising:
- disposing a sample in an electron spin resonance spectrometer comprising:
- a bridge comprising a sample arm and a reference arm;
- a probe electrically connected to the bridge and comprising:
- a first conductor electrically connected to the bridge;
- a shorting member electrically connected to the first conductor;
- and
- a second conductor electrically connected to the shorting member;
- a detector electrically connected to the bridge;
- a magnet disposed proximate to the probe and the sample;
- and
- a modulation coil interposed between the magnet and the sample;
- transmitting an excitation frequency from an excitation source to the sample through the sample arm and the shorting member;
- modulating a magnetic field present at the sample from the magnet at a reference frequency applied to the modulation coil;
- absorbing, by the sample, the excitation frequency;
- producing a signal frequency at the shorting member;
- transmitting the signal frequency from the shorting member toward the detector;
- combining the signal frequency from the sample arm and the excitation frequency from the reference arm to produce a detection frequency;
- and
- detecting, by the detector, the detection frequency as a function of changing the excitation frequency or a magnetic field strength present at the sample to acquire the electron spin resonance spectrum,
- wherein the sample is disposed external to the probe, the magnet, and the modulation coil.
Dependencies are inferred from the claim text.