Radiation-Hard High-Bandwidth Data Transmission for Detectors at High Energy Colliders

d. Radiation-Hard High-Bandwidth Data Transmission for Detectors at High Energy Colliders Detector data volumes at future colliders will be nearly 100 times more than today. Single subdetectors will have to transmit 10s to 100s of Tbps. While commercial off the shelf data transmission solutions will deliver the needed performance in the near future, these products cannot be used in future colliders for two main reasons: they will not function in a high radiation environment (hundreds of Mrad), and they are in general too massive to be placed inside detectors, where added mass degrades the measurements being made. Two main industrial developments are therefore of interest: very low mass, high bandwidth electrical cables, and radiation hard optical transceivers. Electrical cables may be twisted pair, twinax, etc., with as low as possible mass (and therefore small size) while compatible with multi-Gbps per lane transmission over distances up to 10m. Cable fabrication using aluminum, copper clad aluminum, or non-metallic conductors (such as CNT thread), is of interest. Many dielectrics are not radiation hard, so fabrication with non-standard dielectrics is important. Optical transceivers up to 100 Gbps will be needed. Many off the shelf commercial products meet or exceed the required bandwidth, but contain circuits that fail when exposed to ionizing radiation doses of hundreds of Mrad. Radiation hardened versions of commercial transceivers (or equivalent) are therefore of interest, where radiation hardness is achieved without adding mass or increasing size, for example by design changes to the integrated circuits used, specifically radiation hard device modeling and library development of deep sub-micron CMOS fabrication processes. Proposals that do not address the required level of radiation hardness will be considered non-responsive. Questions Contact: Helmut Marsiske, helmut.marsiske@science.doe.gov