电子直线加速器的腔式耦合器通过侧面匹配膜片和方波导相连，它引起了腔中场振幅和相位的不对称。

The transition from the rectangular waveguide to the cavity coupler in LINACis made by means of a matching iris, which leads to amplitude and phase asym-metries of fields in the cavity coupler.

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随着-10％下降至0.31赫兹的低端频率响应，3333A系列加速器提供优良的低频率相位响应。

With a low end frequency response of -10% down to 0.31 Hz, the 3333A series accelerometers offer excellent phase response at low frequencies.

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