Special Beam Position Monitor with 8-button Electrodes for the Kekb Interaction Region
نویسندگان
چکیده
To maintain the optimum collision condition of the two beams, two special BPMs with 8-button electrodes, called OCTOPOS, were installed inside the super-conducting quadrupole magnets (QCSs) at the interaction region (IR) of KEKB. We have commissioned the OCTOPOS BPMs for simultaneous measurements of both the electron and positron beam positions from their composite signal. A collision orbital feedback using OCTOPOS has been put into practical application since last November. The position of each beam is separable by analyzing the nonlinearity of the pickup sensitivity from the signal amplitudes of the eight button electrodes. This report describes the characterization of the OCTOPOS and its performance.
منابع مشابه
Beam Position Monitor System for the Orbit Feedback at the Interaction Region of Kekb
To maintain the optimum collision condition of the two rings, two special BPMs with 8-button electrodes, called OCTPOS, were installed inside the super-conducting quadrupole magnets (QCSs) at the interaction region (IR) of KEKB. Four normal BPMs with 4-button electrodes were incorporated outside the QCSs. We have commissioned the OCTPOS BPMs for simultaneous measurements of both the electron an...
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