1. NSW Electronics Preliminary Design Review Feb 2015 Introduction and Review Scope Feb 2015 NSW ELTX PDR S. Zimmermann 1 Stephanie Zimmermann

2. The NSW Upgrade Project Feb 2015 NSW ELTX PDR S. Zimmermann 2 The New Small Wheel Upgrade aims at replacing the present Small Wheel (CSC + MDT/TGC EIL/EIS1,2) to address high fake single muon trigger rate and rate limitations at HL-LHC luminosities The NSW basic layout is the same as the one of the present Small Wheel: 16 sectors, 8 small and 8 large ones per side

3. Detector Elements, Terminology Feb 2015 NSW ELTX PDR S. Zimmermann 3 The NSW has 2 different detector technologies: sTGC and MicroMegas (MM) Each NSW sector (16 per wheel/side) consists of 2 sTGC and 2 MicroMegas wedges Each MM wedge consists of 2 quadruplets (chambers, modules) Each sTGC wedge consists of 3 quadruplets (chambers, modules) Each MM/sTGC quadruplet comprises 4 active layers Micromegas rely on strips as readout elements, stereo strips for 2 nd coordinate sTGC rely on strips (precision coord), pads (pad trigger) and wires (2 nd coord) as readout elements MM and sTGC modules are supported by a central spacer which in turn is mounted on the NSW JD/structure MicroMegas “Double” wedge sTGC wedge quadruplet spacer

4. NSW Electronics Feb 2015 NSW ELTX PDR S. Zimmermann 4 Electronics is a major part of the NSW project but in terms of R&D, production and cost !! 4 custom ASICs 4 main custom on-chamber boards sTGC on-detector trigger USA15 Trigger Processor

5. Overall NSW Schedule, Electronics Constraints I Feb 2015 NSW ELTX PDR S. Zimmermann 5 Chamber construction, testing and commissioning MM Module-0 completion by summer sTGC Module-0 completion by early summer  Testing with (prototype) electronics required  GNDing issues, EMC, cooling, mechanical fixation, service routing impact electronics and detector constructions  needs to be final before series prod.

6. Overall NSW Schedule, Electronics Constraints II Feb 2015 NSW ELTX PDR S. Zimmermann 6 Starting from the end – LS2 begin mid 2018 Wheel Assembly (Preliminary, assuming weels assembled one after the other) First sectors fully equipped with frontend electronics and services needed Rim electronics + services TDR “dream” of a 1 year burn-in test of the full wheel given up !! Assembly of MM/sTGC wedges from mid 2016

7. Overall NSW Schedule, Electronics Constraints III Schedule is tight Can not afford having to repeat any of the prototypes steps Can not afford misunderstandings in specs of required functionality requiring additional iterations Rely on Co-production of VMM, ART, TDS and ROC final ASICs. Feb 2015 NSW ELTX PDR S. Zimmermann 7

8. 2015 LHCC Milestones Feb 2015 NSW ELTX PDR S. Zimmermann 8 The Electronics PDR is a important milestone for the NSW Electronics Several other milestones to meet this year List provided to LHCC for tracking progress

9. Scope of the Review Feb 2015 NSW ELTX PDR S. Zimmermann 9 From NSW point of view, the goal of the PDR is to ensure that clear, complete and detailed specifications exist in a written down form, which define and outline each component’s functionality, interfaces, protocol and connectivity to neighboring components and compatibility with the overall ATLAS readout and trigger architecture. We would like to request the review panel to assess that assumptions made concerning background environment and hit rates are correct, and have adequately been taken into account when calculating occupancies, bandwidths and buffer depths. We would like to request the review panel to judge if there are any items overlooked, any inconsistencies or functionality to clarify, and assess that specifications are complete The review panel is asked to scrutinize the presented schedule, in terms of compatibility between the different components (prototype) timelines, and in view of external constraints.

10. What the Review will not cover Components: – VMM ASIC (functionality other than the VMM – ROC readout interface) – TDS ASIC -- PDR held in July 2014 On-Detector Cooling System Design --- was part of the chamber construction Design Review in July 2014 Service Layout and Service Routing on chambers, wedges, sectors and on the overall New Small Wheels Funding Cost and Financial Aspects Feb 2015 NSW ELTX PDR S. Zimmermann 10

11. Review Supporting Documents I Documents, in the form of Design Notes have been prepared and are available in EDMS https://edms.cern.ch/nav/P:ATLAS:V0/P:1546242771:V0 (NSW Elx folder) and linked from the top of the Review Agenda pagehttps://edms.cern.ch/nav/P:ATLAS:V0/P:1546242771:V0 Design Notes describe functionality, requirements, interfaces (protocols, data format, connectivity) and constraints for the individual NSW electronics components They refine the information given in the TDAQ in much greater detail. Where there is conflicting information (#fibers, …), the Design Note information takes precedence It is expected that the Design Note documents will evolve with time across the prototype and final component development work Changes which effect boundary between components or functionality require approval from all involved electronics stakeholders Feb 2015 NSW ELTX PDR S. Zimmermann 11

12. Review Supporting Documents II Feb 2015 NSW ELTX PDR S. Zimmermann 12 NSW Luminosity, Hit Rates, Background, Occupancies https://edms.cern.ch/document/ATL-M-EN-0023/1 NSW neutron, photon, radiation dose environment, NSW magnetic field environment https://edms.cern.ch/file/1470513/1/NSW_Radiation_Magnetic_Environment_PDR_2015_2.pdf NSW Grounding Architecture and Policy https://edms.cern.ch/file/1428856/1/NSW_Grounding_Architecture_v2_20150202_PDR.pdf VMM2 Data sheet (for reference) https://edms.cern.ch/file/1473782/1/VMM2_datasheet_v14.pdf ART ASIC https://edms.cern.ch/document/1472976/1 ROC ASIC -- VMM3 readout interface https://edms.cern.ch/document/1470540/1 MicroMegas Frontend Board https://edms.cern.ch/document/1470529/1 sTGC Frontend Board https://edms.cern.ch/document/1470532/1

13. Review Supporting Documents III Feb 2015 NSW ELTX PDR S. Zimmermann 13 L1DDC Card https://edms.cern.ch/document/1470536/1 ADDC Card https://edms.cern.ch/document/1470535/1 https://edms.cern.ch/document/1470535/1 sTGC Pad Logic Trigger https://edms.cern.ch/document/1470537/1 sTGC Router https://edms.cern.ch/document/1470539/1 Trigger Processor (sTGC + MM) https://edms.cern.ch/document/ATL-M-EN-0011/1 NSW On-Detector LV https://edms.cern.ch/file/1473783/1 Optical Fiber Architecture and Plan https://edms.cern.ch/document/1473784/1

14. Review Presentations I Feb 2015 NSW ELTX PDR S. Zimmermann 14 This morning’s session will cover NSW Electronics general aspects System Overview Radiation, Magnetic Field, Rate Environment and Requirements Grounding Strategy and Policy Late morning and afternoon will cover the Frontend Boards and their ASICs (TDS, ART) Note that the VMM itself is not reviewed Note that the TDS PDR took already place last summer Tomorrow’ session will cover the remaining on-detector cards and devices LV Power (On-detector) ROC –VMM3 readout interface Specs Note the different room for tomorrow !

15. Review Presentations II Feb 2015 NSW ELTX PDR S. Zimmermann 15 Friday’s session will cover the Trigger Processor (in USA15) Algorithms Hardware Friday’s session will be in Salle Dirac.