**description:**Computes the steady-state CSR impedance with shielding by parallel plates. By default, the computed impedance is for a dipole magnet that bends the beam in a complete circle.**synopsis:**`csrImpedance`*outputFile*| -pipe[=out] -height=*valueInMeters*-radius=*valueInMeters*-frequencyLimit=maximum=*valueInHz*[,minimum=*valueInHz*] -n=*integer*[-filter=*cutoff1*,*cutoff2*] [-angle=*radians*]**files:**`outputFile`-- SDDS file containing computed impedance. May be used directly with`elegant`'s`ZLONGIT`

element.

**switches:**`-height`-- The full height of the vacuum chamber, in meters.`-radius`-- The radius of the bending magnet, in meters.`-angle`-- The angle of the bending magnet, in radians. The default is .`frequencyLimit`-- Allows specifying the upper frequency limit (required), as well as the lower frequency limit, for the computed impedance.`elegant`will not accept the data if the lower limit is not 0. If the rms bunch length is , then it is suggested to have the maximum frequency much greater than .`-n`-- Allows specifying the number of data points to be computed. The number of points computed is , which is required by`elegant`. A reasonable value is to .`-filter`-- Allows specifying the starting and ending frequency for a simple low-pass filter. The frequencies are given as fractions of the maximum frequency. The filter ramps linearly from 1 to 0 between the two cutoff values. If, for example, the cutoff is 0.2, then the highest frequency in the impedance corresponds to a wavelength of 10 bins () in`elegant`.

**authors:**Y. Wang, H. Shang, ANL/APS. Based on a simplified form[26] of Warnock's [25] formula.