EVLA Racks Bins and Modules PDR

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Presentation transcript:

EVLA Racks Bins and Modules PDR Jim Jackson 2/24/2019 EVLA RBM PDR 17 June 2002

What will be covered? Vertex room layout Vertex room LO/IF rack/bin/module designs CEB LO/IF rack/bin/module designs Digitizer/IF DTS rack/bin/module designs Antenna MCB rack design Vertex room fiber optic patch panel Jim Jackson 2/24/2019 EVLA RBM PDR 17 June 2002

Considerations Top Priority – minimize self generated RFI Cooling Ease of maintenance Cost Connectors Jim Jackson 2/24/2019 EVLA RBM PDR 17 June 2002

RFI Shielding of racks/bins and modules New packaging design for high speed digital Improved shielding of IF/LO electronics Filtering of power and control signals Use of honeycomb filter materials Use of fiber optics Jim Jackson 2/24/2019 EVLA RBM PDR 17 June 2002

RFI Shielding of vertex room New feed cone Modifications to walls and floor Door gaskets Cable penetrations HVAC penetrations L-band feed penetrating floor Jim Jackson 2/24/2019 EVLA RBM PDR 17 June 2002

Cooling Use of honeycomb filter materials Use of solid extruded heatsinks Flomerics Flotherm software Modeling of airflow in racks and modules Identifies potential hot spots Jim Jackson 2/24/2019 EVLA RBM PDR 17 June 2002

Maintenance Tradeoffs between RFI integrity and easy access Blind mate connectors on LO/IF modules No blind mate connectors on Digitizer/IF DTS MCB routers/switches Jim Jackson 2/24/2019 EVLA RBM PDR 17 June 2002

Cost Use of extrusions where possible New blind mate connectors on modules Existing VLA connectors very expensive or obsolete Reuse of some hardware Bins CEB racks Jim Jackson 2/24/2019 EVLA RBM PDR 17 June 2002

Connectors Blind Mate Others connectors Coax: OSP (same as VLBA and ALMA) Data/Power: D-SUB or military style D-SUB is current default (ALMA and ATNF) Other styles still being researched Others connectors As required Jim Jackson 2/24/2019 EVLA RBM PDR 17 June 2002