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Direct detection and time-locked subsampling applied to pulsed electron paramagnetic resonance imaging
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10.1063/1.1903163
/content/aip/journal/rsi/76/5/10.1063/1.1903163
http://aip.metastore.ingenta.com/content/aip/journal/rsi/76/5/10.1063/1.1903163
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Simplified schematic of the time-locked subsampling (TLSS) algorithm.

Image of FIG. 2.
FIG. 2.

Frequency domain plot showing (a) the original band-limited signal and subsampling signal and (b) convolution of the band-limited signal and the subsampling function , resulting in a repeating pattern of the original signal with reflection symmetry around zero Hertz.

Image of FIG. 3.
FIG. 3.

Block diagram of the 300 MHz FT-EPR system. The spectrometer can be configured for both coherent pulsed excitation and stochastic excitation.

Image of FIG. 4.
FIG. 4.

Block diagram of the firmware programmed into the Altera CPLD to transfer four data bytes from the A/D converter as one 32-bit word into the data acquisition card.

Image of FIG. 5.
FIG. 5.

Received FID signals with zero gradient fields for (a) coherent averaging and (b) stochastic excitation for NMP-TCNQ. field was offset by 0.524 mT and the field is 1.0 G. Solid line is the term and dashed line is the term.

Image of FIG. 6.
FIG. 6.

2D image of two samples of NMP-TCNQ using the coherent averaging configuration. 37 projections were acquired for the back projection reconstruction, with the gradient fields set to .

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/content/aip/journal/rsi/76/5/10.1063/1.1903163
2005-04-26
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Direct detection and time-locked subsampling applied to pulsed electron paramagnetic resonance imaging
http://aip.metastore.ingenta.com/content/aip/journal/rsi/76/5/10.1063/1.1903163
10.1063/1.1903163
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