ATLAS Pixel Opto-Electronics

Abstract

We have developed two radiation-hard ASICs for optical data transmission in the ATLAS pixel detector at the LHC at CERN: a driver chip for a Vertical Cavity Surface Emitting Laser (VCSEL) diode for 80 Mbit/s data transmission from the detector, and a Bi-Phase Mark decoder chip to recover the control data and 40 MHz clock received optically by a PIN diode. We have successfully implemented both ASICs in 0.25 micron CMOS technology using enclosed layout transistors and guard rings for increased radiation hardness. We present results of the performance of these chips, including irradiation with 24 GeV protons up to 61 Mrad (2.3 x 10e15 p/cm^2).

17 pages, 23 figures, submitted to NIM Added references. Added figure 15. Moved sec. IV to sec. II

References in corpus (1)

• Radiation-hard ASICs for optical data transmission in the ATLAS pixel detector

Cited by in corpus (5)

• The ATLAS Inner Detector commissioning and calibration
• Optical Link of the Atlas Pixel Detector
• Optical Readout in a Multi-Module System Test for the ATLAS Pixel Detector
• Radiation-Hard Optical Link for SLHC
• Studies of VCSEL Failures in the Optical Readout Systems of the ATLAS Silicon Trackers and Liquid Argon Calorimeters