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    Electron impact time of flight spectrometer
    11.
    发明授权
    Electron impact time of flight spectrometer 失效
    飞行光谱仪的电子冲击时间

    公开(公告)号：US3582648A

    公开(公告)日：1971-06-01

    申请号：US3582648D

    申请日：1968-06-05

    Applicant: VARIAN ASSOCIATES

    Inventor： ANDERSON WESTON A ,  HELMER JOHN C

    IPC: H01J49/40 ,  H01J37/00

    CPC classification number: H01J49/446 ,  H01J49/06

    Abstract: An electron impact time of flight spectrometer including means providing monochromatic electrons of a predetermined kinetic energy which are caused to impinge upon a sample material so that some of the electrons experience an energy transition in passing through the material. The electrons are then differentially accelerated such that electrons having similar energy levels will be caused to converge and arrive at a detector in tightly formed bunches.

    Phase correlation for an rf spectrometer employing an rf carrier modulated by a pseudorandom sequence
    14.
    发明授权
    Phase correlation for an rf spectrometer employing an rf carrier modulated by a pseudorandom sequence 失效
    使用由PSEUDORANDOM序列调制的RF载波的射频光谱仪的相位相关

    公开(公告)号：US3581191A

    公开(公告)日：1971-05-25

    申请号：US3581191D

    申请日：1969-08-06

    Applicant: VARIAN ASSOCIATES

    Inventor： ANDERSON WESTON A

    IPC: G01R23/00 ,  G01R33/46 ,  G06F17/18 ,  G01N27/78

    CPC classification number: G06F17/18 ,  G01R23/00 ,  G01R33/4616

    Abstract: The radio frequency spectrometer is disclosed employing a radio frequency transmitter which transmits a wide band of energy to the sample for simultaneously exciting radio frequency resonance of different spectral lines of the sample. The wide band transmitter energy is generated by a radio frequency carrier which is modulated by a pseudorandom binary sequence to produce the wide bandwidth for exciting the sample. The pseudorandom binary sequence is repetitive and the excited composite resonance signal is repetitively time scanned and sampled at a multiplicity of intervals during each scan. The sampled data derived from repetitive scans are digitized and sequentially stored and added in their respective channels of a storage unit to produce a time average for improving the signal noise ration. The pseudorandom binary sequence is synchronized with the time scan of the composite resonance signal to preserve the phase relation between successively sampled and stored data from successive scans, whereby either pure absorption or pure dispersion mode resonance data is obtained.

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