The Forward Tracker Home Page


The Forward Tracker is a set of drift chambers designed to detect tracks in the range from about 5 to 25 degrees from the interaction point. There are three identical Supermodules, each consisting of three Planar chambers (Orientations), an MWPC, a transition radiator and a Radial chamber. The Planar drift cells each have four wires at 0 degrees, +60 degrees and -60 degrees in the three Orientations; the Radial cells have 12 wires each. A Planar Orientation has 32 rectangular cells with all wires parallel; the wires are read out at one end only, and hence measure only the drift coordinate. A Radial chamber has 48 wedge-shaped cells with the wires pointing radially outwards from the z axis; wires in pairs of wedges are connected together at the hub and read out at both ends, allowing measurement of the coordinate along the wire by charge division.

This is a schematic diagram of the Forward Tracker. Click on the picture for a bigger version.

On-call FTD experts at DESY

During HERA/H1 running, resident experts are available to deal with operational and hardware related problems.

More information about the Forward Tracker

Much of this is restricted to ''H1 internal'' access.

Live information about the Forward Tracker status

The Forward Tracker Group


For further information please contact John Morris

Last updated: September 10th, 1998 by JVM