University of Pennsylvania ATLAS Group


Inner Detector and the Transition Radiation Tracker

Tracking of the individual particle trajectories in the ATLAS experiment is provided by the Inner Detector, which is shown below. It consists of three layers of pixel detectors, four layers of silicon strip detectors, and a  Transition Radiation Tracker  comprised of approximately 425,000 straw proportional tubes, which provides both tracking and transition radiation detection.

Electronics for the TRT (Transition Radiation Tracker)

The University of Pennsylvania has a major responsibility for the on-detector electronics for the TRT, as well as for participating in the overall system design. Key elements of the on-chamber electronics include the development of two custom integratead circuits, the ASDBLR which provides amplification/shaping, baseline restoration and discimination and the DTMROC, which provides 16 channels of time measurement (1 nsec resolution), Level 1 pipeline, buffers for event readout, and threshold control and testpulse injection for the ASDBLR's.

    The following links will take you to an overview of the TRT as well as to summary information on several aspects of the on-detector electronics. A few of the links are still under construction.

ATLAS TRT overview
ASDBLR Integrated Circuit
DTMROC Integrated Circuit
On-Detector Printed Circuit Boards
2004 Tests with Barrel Module Sector at Penn
System Design
System Performance
Analog and Digital PCB for ATLAS given at NSS03
ASDBLR and DTMROC presentation at FEE2003
TRT Conference
Reference Articles for Future Detectors, November 2004
Overview of the ATLAS electronics presented at the Transition Radiation Detector Workshop. Talk and Paper