The impedance acts back on the beam and can cause a variety of effects, often considered deleterious for accelerator functioning. In general, impedance effects are classified under the category of "collective effects" due to the fact that the whole beam must be considered together, and not just a single particle. The whole beam may, however, cause particular changes in the dynamics of individual particles such as tune shifts and coupling. Whole beam changes include emittance growth and instabilities that can lead to beam loss.

ब्रॉडबैण्ड अनुनादक
बीम पर प्रतिबाधा का प्रभाव
प्रतिरोधी भित्ति (Resistive Wall)
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