CMS L1 Muon Trigger Upgrade

Victor Golovtsov

PNPI

468 CSC Chambers

160 Optical Cables

~ 50 GB/s

60 Peripheral Crates

1Track Finder Crate

4 SCSI-II Cables

~ 600 MB/s

CMS L1 Muon Trigger Project. PNPI activity

6064 Copper Cables

~ 1 TB/s

CMS L1 Trigger Block Diagram

4 MuonTracksto

L1 GT

Track SegmentsLocal Tracks

CMU/ PNPI : Anode front-end electronics (AD16 boards) 160 000 channels

UCLA/ PNPI : Anode local charge track electronics

(ALCT 288, ALCT384, ALCT672 boards)

Muon pattern-finder logic for local track One board per chamber

UF/ PNPI : CSC Track Finder (12 Sector Processor (SP) boards)

One board per 60 degree sector

Each SP indentifies 3 best muon tracks in 60-degree azimuthal sector and measures the

transfer momentum Pt

Reasons:

• LHC luminosity increase to 2·1034 cm-2s-1

with the value of pile-up increase up to ~ 50

• Expected increase in intensity on L1 trigger input to ~ 6 times

Consequences to use:

• Standardization and flexibility of the technological support

• Modern FPGA allows applying complex reconfigurable algorithms

and high-speed serial input-output links

• Modern high-speed optical communication channels

CMS L1 Trigger Upgrade

A basic platform for CMS upgrade is

Micro TCA ( Micro Telecommunications Computing Architecture)

developed by

PICMG (PCI Industrial Computer Manufactures Group),

cоnsisting of 227 companies (87 executive and 140 associated)

The initial goal of PICMG was to expand the PCI standard

Currently – development and implementation of guidelines

for computer architectures.

Including - Advanced TCA, Advanced MC, Micro TCA, COM Express,

Compact PCI specifications

MicroTCA describes the modular design of the systems and requirements for

Advanced Мezzanine Сards (AMC), the overall mechanical properties, form

factors of motherboards, power supply, input-output modules, cooling facilities,

as well as control features of Micro TCA-Systems

Basic platform of L1 Upgrade

MicroTCA Crate Infrastructure

Vadatech VT892 Crate АМС Мodule 2W АМС Mezzanine Board

Various types of back planes convenient for users can be applied.

The version of a back plane of VT892-123-000-000 is accepted for CMS.

Custom-made version of VT894 board can be used for additional connections

Crate is equipped with Carrier Hubs (MCHs) ports, Power Modules (PM), and Cooling Units (CUs).

MCH ports are applicable for users of commercial standards (GbE, PCIe, SRIO and SAS/SATA)

One of slots with its MCH-ports is specified to be used for distribution of frequency,

trigger signals, data acquisition, connections providing by the custom-made mezzanine board

Вased on Vadatech VT892 7U crate, providing 6 2W slots

Commercial MCHManagement Ethernet

AMC13: Clocks,

Fast Control, DAQ

Fiber Links from Detector

Ethernet

Fiber Links from Detector

Power

Power

Fiber Links to Trigger

AMC13 – custom-made module providing ТТС- signals

and TTS & DAQ connection

AMC13 should be set in the second slot and equipped by the back panel board to

provide communication "point-to-point" to each of 12 AMC slots

AMC13 doesn’t use TTCrx ASIC, it is based on ADN2814 chip, providing the restoration

of frequency of 160 МHz and TTC data flow of 80 МB/s

AMC13 provides a delay of the trigger signal (Level 1)

and readout pipeline (Level 2) with rate of 5 Gb/s

CMS – Micro TCA Crate

12 AMC Slots

Fiber Links to Trigger

Optical Module

Back Plane Connector

Custom Panel 30 mm long

Mezzanine Board

Оptical Connectors

Logic Module

Logic Module contains Virtex-7 XC7VX690T FPGA:

80 GTH-Transceivers up to 13 Gb/s, 1М Logic Cells, 3600 DSP Slices etc

LUT on the mezzanine board with address space of 30 bits

Optical module:

• 7 12-channel optical receivers Avago AFBR-820BEZ

• 3 12- channel optical transmitters Avago AFBR-810BEZ

In total 86 optical inputs and 28 optical outputs with the rate of up to 10 Gb/s

CMS CR -2013/383 (12 Nov 2013)

The CMS Modular Track Finder Board MTF7

University of Florida, Rice University

Sestor Processor Preproduction MTF7

The main task is reduction of intensity of L1 trigger without essential loss of efficiency.

The philosophy of the original trigger has some redundancy :

three independent muon systems are associated at the level of the global trigger

The upgrade trigger has the association at the level of track finding to provide a quality selection

of tracks for the information of all three systems .

Upgrade Muon Trigger , 1 Sector Original Muon Trigger Upgrade Muon Trigger

Separate Track Finder for a zone of overlapping between endcup and barrel (Overlap) is entered.

This is PNPI responsibility

CMS L1 Trigger Upgrade Strategy

CERN Cost Book

2014 – 2015: Test station creation and preproduction stage :

1. Crate VT892 + Infrastructure - 53 KCHF

2. Test Stand - 20 KCHF

3. Construction of 3 MTF7 prototypes - 63 KCHF

In total : 136 KCHF

L1 Trigger Upgrade : Muon Overlap Track Finder

Cost Book PNPI – 312 KCHF (Equipment Only)

Overlap region: 0.8 < /η/ < 1.25

The data of the three systems are

implemented for the trigger decision:

CSC, DT, RPC.

Muon Overlap Track Finder

2015 – 2016: Production stage :

1. Production of 10 MTF7 modules - 176 KCHF

In Total: 312 KCHF

Financial Project

2014 - 14 MRb

2015 - 16 MRb

In Total : 30 MRb

In Total: 32 MRb

2016 - 2 MRb