Here's what the detector looks like in a cut view perpendicular to the beam axis and from the side.
The barrels are radially positioned at 5.97cm, 10.16cm and 14.91cm. The maximum length of the SVT is 44.1cm and it has an eta coverage of +-1.
Each wafer SDD is 280microns thick silicon with an area of 6x6cm. This makes the total average radiation length of the SVT around 4.5% including the Front End Electronics
The wafers are effectively split in two (continental divide) and are read out at both ends. There are a total of 480 anodes read out per wafer. The signal from each anode is sampled and stored with Switched Capacitor Array (SCA) with a depth of 128 capacitors. This effectively creates a detector with 256x240 pixels per wafer.
This whole operation is led by Rene Bellwied mail Rene or the group mail list if you have any questions