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Absolute Beam Position Monitoring Using HOM-damper Signals

出版	Univ.-Bibliothek Frankfurt am Main, 1998
URL	http://books.google.com.hk/books?id=yt5ouwEACAAJ&hl=&source=gbs_api

註釋

To preserve the required beam quality in an e+/e- collider it is necessary to have a very precise beam position control at each accelerating cavity. An elegant method to avoid additional length and beam disturbance is the usage of signals from existing HOM-dampers. The magnitude of the displacement is derived from the amplitude of a dipole mode whereas the sign follows from the phase comparison of a dipole and a monopole HOM. ...