Beams Document 4436-v3

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Distortion in Resistive Wall Current Monitor Signal Transmission Lines

Document #:
Beams-doc-4436-v3
Document type:
Note
Submitted by:
Duncan J Scott
Updated by:
Duncan J Scott
Document Created:
28 Aug 2013, 14:21
Contents Revised:
30 Aug 2013, 10:58
Metadata Revised:
05 Sep 2013, 13:30
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Abstract:
The new tomographic reconstruction program TARDIS being implemented in the Main Injector and Recycler requires accurate longitudinal charge profiles measured by resistive wall current monitors (RWCM). A basic theory of signal attenuation due to skin effect resistances in coaxial transmission lines is presented to explain signal distortion from the RWCMs. The theory is used to generate a finite impulse response function that can be convoluted with a distorted signal to reproduce the original signal. Knowledge of the exact cable properties, (lengths, attenuation) in the line is essential and should be checked for the Main Injector and Recycler.
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