Author/Authors :
Arinaga، نويسنده , , M and Flanagan، نويسنده , , J and Hiramatsu، نويسنده , , S and Ieiri، نويسنده , , T and Ikeda، نويسنده , , H and Ishii، نويسنده , , H and Kikutani، نويسنده , , T and Mimashi، نويسنده , , T and Mitsuhashi، نويسنده , , T and Mizuno، نويسنده , , H and Mori، نويسنده , , K and Tejima، نويسنده , , M and Tobiyama، نويسنده , , M، نويسنده ,
Abstract :
For the stable high-luminosity operation and luminosity increase, the electron and positron storage rings of the KEK B-Factory (KEKB) is equipped with various beam instrumentations, which have been working well since the start of the commissioning in December, 1998. Details and performance of the beam-position monitor system based on the spectrum analysis using DSPs, the turn-by-turn BPM with four-dimensional function available for measurements of the individual bunch position, phase and intensity, the parametric beam-DCCTs designed so as to avoid the magnetic-core-selection problems for the parametric flux modulation, the bunch-by-bunch feedback system indispensable to suppress the strong multibunch instabilities in KEKB, the various optical beam diagnostic systems, such as synchrotron radiation interferometers for precise beam-size measurement, the tune meters, the bunch length monitors and the beam-loss monitors are described. Delicate machine tuning of KEKB is strongly supported by these instrumentations.
Keywords :
Collider , Beam monitors , Beam diagnostics , storage ring
