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48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
"""Example Free Induction Decay (FID) simulation using the quackseq simulator.
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The sample is the default BiPh3 NQR sample.
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"""
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import logging
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from quackseq_simulator.simulator import Simulator
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from quackseq.pulsesequence import QuackSequence
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from quackseq.functions import RectFunction
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from matplotlib import pyplot as plt
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if __name__ == "__main__":
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger(__name__)
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seq = QuackSequence("FID")
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seq.add_pulse_event("tx", "3u", 100, 0, RectFunction())
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seq.add_blank_event("blank", "5u")
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seq.add_readout_event("rx", "100u")
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seq.add_blank_event("TR", "1m")
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sim = Simulator()
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sim.set_averages(100)
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sim.settings.noise = 1 # microvolts
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result = sim.run_sequence(seq)
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# Plot time and frequency domain next to each other
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plt.subplot(1, 2, 1)
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plt.title("Time domain Simulation of BiPh3 FID")
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plt.xlabel("Time (µs)")
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plt.ylabel("Signal (a.u.)")
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plt.plot(result.tdx[0], result.tdy[0].imag, label="imaginary")
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plt.plot(result.tdx[0], result.tdy[0].real, label="real")
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plt.plot(result.tdx[0], abs(result.tdy[0]), label="abs")
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plt.subplot(1, 2, 2)
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plt.title("Frequency domain Simulation of BiPh3 FID")
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plt.xlabel("Frequency (kHz)")
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plt.ylabel("Signal (a.u.)")
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plt.plot(result.fdx[0], result.fdy[0].imag, label="imaginary")
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plt.plot(result.fdx[0], result.fdy[0].real, label="real")
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plt.plot(result.fdx[0], abs(result.fdy[0]), label="abs")
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plt.legend()
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plt.show()
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