sTGC Trigger Demonstrator sTGC Trigger Demonstrator ATLAS Israel Annual Meeting 30 December 2012 Lorne Levinson, Julia Narevicius, Alex Roich, Meir Shoa, Vladimir Smakhtin L. Levinson, sTGC Trigger Demonstrator130 December, 2012

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sTGC trigger demonstrator Demonstrate trigger path only from chamber to Sector Logic input Not for studying detector properties and ultimate resolution: ToT is non-linear and saturates, probably not used for final ASD use cosmic rays BNL VMM1 ASD: 32 ASDs for strips, 12 for pads Strips: convert ToT to charge by measuring length of ToT with 1nsec sampling: – Emulates future “TDS” = Trigger Data Serializer ASIC – peak-to-time would be the same flash ADC would deserialize with 5nsec /bit – Serial output at 6.25Gb/s Pads: Simple trigger: dual 3-out-of-4 coincidence logic Serial transmission of pad trigger data to TDS (but without BCID assignment) Centroid finding, centroid choosing, track vector calc Latency measurement 30 December, 2012L. Levinson, sTGC Trigger Demonstrator3

Not demonstrated Because ToTs are saturated, no attempt to get precision centroids: No Router, instead there is direct 6Gb/s link from TDS to centroid finder via twinax cables No readout of VMM 30 December, 2012L. Levinson, sTGC Trigger Demonstrator4

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Pad over-lapping for 3-out-4 coincidence Shown above: pad overlap in a pair of layers Three rows of 7 pads. Two rows of 8 pads The second pair of layers in the multiplet is the same. 37 pads per pair of layers – Total 4x37 = 148 pads Trigger looks in 12ns windows (six 2ns samples): if 3 or more pads are non-zero, a trigger is generated 30 December, 2012L. Levinson, sTGC Trigger Demonstrator6

sTGC Trigger Demo-1 FPGA board 30 December, 2012L. Levinson, sTGC Trigger Demonstrator7 Power module Trigger Data Serializer FPGA ASD connectors Pad trigger/ centroid FPGA 10G Quad fibre interface 10G twinax*4 connector Ethernet readout

Status PCB boards being tested – FPGAs correctly receives non-standard LVDS from VMM ASDs Firmware done, not tested, but much the same as for Demo-0 Reassembling pad signal extraction and ASD adapter boards … there are both “left” and “right” VMM boards – Board to bring pad signals to edge of chamber for 2 or 3 rows of pads – Boards to adapt VMM ASDs to the strips on edge of chamber – Boards to adapt VMM ASDS to the board that extracts the pad signals We have 46 VMMs in Israel, 44 needed for full test Configuration system, HW and SW, being built for up to 48 ASDs Getting results for Milestone Meeting will be tight, depends on – no disasters with the PCB boards – understanding of 6.25Gb/sec serial links (deserializers) – We have backup parallel 6Gb/s links if problems with serial links 30 December, 2012L. Levinson, sTGC Trigger Demonstrator8

Configuration of 12x4 VMM ASDs 30 December, 2012L. Levinson, sTGC Trigger Demonstrator9

Latency  sTGC NSW Trigger, TDAQ Week Oct L. Levinson The table shows the latency from the interaction point, through the precision strip trigger logic for the Inner Layer to the Sector Logic in USA-15. We take as a model the Xilinx Virtex6. All times are estimates except that for the centroid finder which has been measured.

The end 30 December, 2012L. Levinson, sTGC Trigger Demonstrator11