BPM button characterization for offset calibration
In this note, a basic theory of wave propagation in dielectric media is discussed in conjunction with S parameters to derive the button gain coefficient g{sub e} and an analytic expression for the signal from time domain reflectometry (TDR) measurement on a cable and a button. The results can be used to measure the button capacitance and the characteristic impedances of the cable and the button feedthrough. Since g{sub e} is a function of S parameters and the button capacitance C{sub p}, a suggestion is made to make the gain coefficients the same for all four buttons in a BPM by carefully matching the buttons and the cables.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 87850
- Report Number(s):
- LS-193; ON: DE95015222; TRN: 95:017832
- Resource Relation:
- Other Information: PBD: Mar 1992
- Country of Publication:
- United States
- Language:
- English
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