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2. Background noise measurements
Given the evolution of measuring equipment and the performance of low-noise amplifiers, it appears that the best representation of the quadrupole for measuring the various sources of noise is that based on the two noise current generators placed respectively at the input and output of the quadrupole. The metrologies developed enable direct measurement of the quantities
, which fully characterize quadrupole noise.
The block diagram of a noise measurement chain is...
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Background noise measurements
Background noise in simulators
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