A chirped pulse Fourier transform microwave spectrometer with multi-antenna detection

A chirped pulse Fourier transform microwave spectrometer with multi-antenna detection
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具有多天线检测功能的啁啾脉冲傅立叶变换微波光谱仪

DOI:
10.1016/j.jms.2020.111396
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发表时间:
2020
影响因子:
1.4
通讯作者:
Grubbs II, G.S.
Grubbs II, G.S.
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Duerden, Amanda;Marshall, Frank E.;Moon, Nicole;Swanson, Christian;Donnell, Kristen M.;Grubbs II, G.S.

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报道了一种新型啁啾脉冲傅里叶变换微波(CP-FTMW)多天线探测光谱仪的研制。仪器的设计和执行代表了一种全新的方法,可能会增加灵敏度的CP-FTMW光谱,因为它不涉及增加采样,功率,或通过微波与分子样品。这对于只有一个采样点可用的实验特别有利。MAD-CP-FTMW或“MAD Chirp”在线性分子羰基硫化物(OCS)和不对称顶部分子1,3-二氟苯(DFBZ)上都得到了证明,检测点位于广播天线以及与传统接收天线正交。在每个检测点对每个样品进行信噪比比较并报告。实验证明,在这些新的位置检测到的信号是分子,而不是一个反射的工件报告。虽然这是解决CP-FTMW灵敏度的可能新方法的第一步,但目前没有报告基于该方法的灵敏度增加。
The construction of a new chirped pulse Fourier transform microwave (CP-FTMW) spectrometer with multiple-antenna detection (MAD) is reported. The instrument design and execution represent a completely new approach to possibly increasing sensitivity in CP-FTMW spectroscopy as it does not involve increased sampling, power, or passes of microwaves with the molecular sample. This is particularly advantageous for experiments where only one sampling point is available. The MAD-CP-FTMW or “MAD Chirp” is demonstrated on both linear molecule carbonyl sulfide (OCS) and asymmetric-top molecule 1,3-difluorobenzene (DFBZ) with detection points at the broadcast antenna as well as in the quadrature to the traditional receiving antenna. Signal-to-noise comparisons with each sample at each detection point have been made and are reported. Experiments demonstrating the signals detected in these new positions are molecular and not an artifact of a reflection are reported. Although this represents a first step to a possible new approach to addressing CP-FTMW sensitivity, no sensitivity increase based on this method is currently reported.
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