Author/Authors :
Abe، نويسنده , , R and Aihara، نويسنده , , H and Alimonti، نويسنده , , G and Asano، نويسنده , , Y and Bakich، نويسنده , , A and Banas، نويسنده , , E and Bozek، نويسنده , , A and Browder، نويسنده , , T and Dragic، نويسنده , , J and Everton، نويسنده , , C and Fukunaga، نويسنده , , C and Gordon، نويسنده , , A and Guler، نويسنده , , H and Haba، نويسنده , , J and Hara، نويسنده , , K and Hara، نويسنده , , T and Hastings، نويسنده , , N and Hazumi، نويسنده , , M and Heenan، نويسنده ,
Abstract :
The Belle spectrometer was designed for studies of B meson decays at an asymmetric e+e− collider operating at the ϒ(4S) resonance. One of its crucial components, a silicon vertex detector (SVD), is placed just outside a cylindrical beryllium beam-pipe. After a year of Belle operation an upgraded version of SVD was installed during the regular summer shut-down. The new SVD follows the same design, with a few important improvements. Rad-soft readout electronics was replaced by rad-tolerant one, allowing for longer lifetime of the detector. A new radiation and temperature monitoring system was developed and implemented. A saw-shaped inner surface was introduced in the beam-pipe to prevent potential synchrotron radiation damage. The upgraded detector started operating successfully in October 2000.
Keywords :
B-factory , Belle , Silicon Vertex Detector , Radiation tolerance performance
