Beam-coupling impedances (Z) for the 7-GeV APS storage ring have been numerically estimated. In order to confirm these calculations, the wire method with a synthetic pulse technique was used to measure the beam coupling impedance of various vacuum components around the main storage ring. A section of the beam+antechambers, a vacuum isolation valve with and without the RF shielding screen, an insertion device, and a photon absorber were used as a device under test (DUT) to obtain the results. The results were compared with the computer simulations and the Z or k-dependence on bunch lengths was studied.
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Beam-coupling impedances (Z) for the 7-GeV APS storage ring have been numerically estimated. In order to confirm these calculations, the wire method with a synthetic pulse technique was used to measure the beam coupling impedance of various vacuum components around the main storage ring. A section of the beam+antechambers, a vacuum isolation valve with and without the RF shielding screen, an insertion device, and a photon absorber were used as a device under test (DUT) to obtain the results. The results were compared with the computer simulations and the Z or k-dependence on bunch lengths was studied.
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Song, J.J. & Kustom, R.L.RF impedance measurement status for the 7-GeV Advanced Photon Source (APS),
article,
January 1, 1992;
Illinois.
(digital.library.unt.edu/ark:/67531/metadc1092379/:
accessed April 19, 2018),
University of North Texas Libraries, Digital Library, digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.