| Optical Links for the ATLAS Pixel Detector |
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The Laboratory for Detector Development is also involved in the tests and developement of the optical links for the ATLAS Pixel Detector.
Optical links were chosen as baseline for the data transmission in the
ATLAS Pixel Detector because of several advantages.
Some of them are high bandwidth, low radiation length and immunity
to electromagnetic interferences.
The radiation dose inside the experiment will be very high, typically 30MRad and 1015 n/cm2 over a 10 year period of operation. The effects on the attenuation of the fibres showed a necessity to use radiation hard fibre in the innermost part of the detector. Also emitter which will be placed on the modules have to be radiation hard. Vertical Cavity Surface Emitting Lasers (VCSELs) showed promising results in previous radiation tests.
In Wuppertal several tests with irradiated VCSELs were performed. There will also be a complete setup to test the performance of Pixel Optical Link Electronics designed by Siegen and Ohio.
Measurements:
VCSEL
and PIN Array Components
Bit
Error Rate Test System for the Pixel Optical Chips VDC-P and DORIC-P
Annealing
studies of irradiated VCSEL
Lifetime
studies of irradiated VCSEL
Speed
of response of irradiated PIN diode
Test
of VCSEL in a high magnetic field
Bit
Error Rate of the VDC at 80 Mbit/s
last modified : 11 Jan 2000