common test for l0 calorimeter electronics (2 nd campaign) 4 april 2007 speaker : eric conte (lpc)

Common test for L0 calorimeter electronics (2nd

campaign)4 April 2007

Speaker : Eric Conte (LPC)

Outline

1. Reminder : L0 calorimeter boards (ECAL Board + HCAL Board + PreShower FE Boad

+ Trigger Validation Board + SPD Control Board)

2. Choice and description of the experimental setup

3. Common tests achieved

4. Summary and perspectives

Slide 2 / 14 Barcelona + LAL + LAPP + LPC Common Test for L0 calorimeter

1. Reminder : L0 calorimeter overview

studied system


Detector + PM8x4 cells/FE card

10 m cables

80 m optical link

Selection Crate

Platform on top of calorim

eter

LVDS links

14 ECAL crates 4 HCAL crates 8 Prs/SPD crates 8 cards per half crate

FE

FE

FE

FE

FE

FE

FE

FE

Ba rrack

LVDS links

L0 Decision Unit

80 inputs

TotalEnergy

FE

FE

FE

FE

FE

FE

FE

FE

HighestElectron

HighestPhoton

ECAL HCAL

HighestHadron

SecondHighest

Highestlocal

80 linksfrom 50 cards

8 inputs 4 inputs

28 inputs

4 outputs

One Validation card per half ECAL crateOne SPD sum perhalf PreShower crate

FE

PreShower / SPD

AddressFE

FE

FE

Validation Card

LUT

highestelectron

highestphoton

28 inputs

highestlocal

28 inputs

LUT

Level 0 Decision Unit

8 inputs x 8 bits

Merge back to 50

address match

highest

Highest global

highestglobal

28 inputs

E TOT

8 inputsSPD

multiplicity

Add

16 inputs

SPDmultiplicity

Add

ECALboard

PreShower FE board

HCAL board

SPD Control Board

Trigger Validation

Board

SPD-CB BCID, SPD multiplicity (sum of the 8 PS boards)

PS BCID, SPD multiplicity

ECAL BCID, ET max, total ET, address

HCAL BCID, ET max, address

8x

8x

HCAL analogic data

ECAL analogic data

PS analogic data

SPD numeric data (from SPD VFE)

1. Reminder : Interactions between the different devices

8x

The system is represented for only one SPD Control Board :

ECALboard

8xECAL BCID,

ET max, address

PS BCID, ECAL address ,

PS & SPD neighbours cells

2x


TVB BCID

Highest electron cluster,

highest photon cluster,

highest local pi0 cluster,

highest global pi0 cluster,

4 hadron candidates

optic links

1. Reminder : phasing and synchronisation options

Putting in phase the input signalsPutting in phase the input signals

- Preshower : possibility to change the phase of each ECAL input- SPD Control Board : no delay chip (data are coming from the backplane)- Validation Board : the ECAL-PS-SPD input signals and HCAL input signals

can be phased independently. Each input can be read on the rising or falling clock edge.

Data synchronisationData synchronisation

Injection and acquisition of each board can be synchronised by a calibration signal (TTC Calibration Pulse). Some pipe-line registers allow to delay data :

- PreShower : one common delay for the 2 ECAL inputs- Validation board : all data flows can be delayed (one common delay for all data coming from a same board)

BCID alignmentBCID alignment

- BCID alignment can be achieved by a BCID reset signal.- Delay options are present on PS, Validation and SPD Control Board for offsetting the latencies between their proper BCID and the BCID inputs.


2. Choice and description of the setup

running the different boards in the electronics installations of the LHCb experiment

checking the connectivity between the boards ( production boards )

checking the synchronization and alignment options of data and BCID values

verifying all functionalities of the system by long term tests

set up an automated procedure to check the cabling

Main goals of these common tests

This common test is a preparation of the calorimeter trigger electronics commissioning phase.



Summary of the first campaign : 20 November – 1rst December 2006


Begin of the second campaign : 2 April 2007 …

ECAL FE – PS/SPD FE combined system : algorithm and communication extensively testedsynchronization OK

PS/SPD FE – SPD CB : synchronization problems new test performed in Clermont (see Xavier’s talk)

ECAL/HCAL FE – PS/SPD FE – Trigger Validation Boarddiagnosis of data corruptions in TVB spy RAMs

Check that the problems are fixed

Set up an automated procedure for checking the cabling


Calorimeter boards used :Calorimeter boards used :

Cable length :Cable length :

A complete crate of ECAL FE boards (16 boards)

Some of them do simulate HCAL FE Boards

7 PreShower FE boards (all from preserie – final design)

2 validation boards receiving all ECAL data. One of the 2 boards receives HCAL and PreShower data (see Victor’s presentation)

1 SPD Control Board from preserie (see Alvaro’s presentation)

Possibility to generate Top

neighbours, Right neighbours and

Top-Right corner neighbours


We used cables with the lengths as defined for the experiment.

were prototypes in the November

common test

2 CROC-v2 boards used one SpecsMaster board (4 ports) is needed for the test.

Necessity to have only one software for steering the devices the CAT codes of each board are merged into one.

An important effort, prior to AND during the test , has been made aiming at developing common software between the devices to handle automated tests.


Software considerations :Software considerations :




Building 156

ECAL crate 16 ECAL boards 2 Trigger Validation Boards

PreShower crate7 Preshower boards

1 SPD Control Board

3. Common tests : ECAL - PreShower

Automatic determination of the allowed phase range for ECAL to PS data

checking the connectivity of the ECAL inputs of the PreShower board checking the ECAL address order determining the interval of phase

OK, but found ranges between 3 and 6 ns for the seven boards. Not very comfortable. To be scrutinized further.


ECALboard

PreShower FE board

ECAL injected by RAM

PS, SPD injected by RAM

ECALboard

ECAL BCID, ET, address

Outputs are acquired by RAM

Data alignment :All checks from the previous common test were successfully reproduced.

Checking cabling process essentially written (consistently with PVS control). Still to be tested.

3. Common tests : SPD CB - PreShower

Clermont test has been reproduced successfully

An automated process checks now the correctness of data at the SPD Control Board level

Left to check the SPD CB response when PS/SPD FE board data are desynchronized (today)


PreShower FE board

SPD Control BoardPS BCID, SPD

multiplicityOutputs are

acquired by RAM

SPD data injected by RAM

Barcelona – Clermont collaboration

Common tests : ECAL – HCAL – PreShower - Validation


The connectivity with ECAL and HCAL boards has been checked.

Problems of SPY RAMS seen in December have been fixed by the new firmware version of the HCAL FPGA.

See Victor’s talk for details.

Preshower to be added today

In these tests, ECAL, HCAL and PreShower data are injected by RAM. The acquisition is made by the spy RAMs of the Trigger Validation Board.

Summary and perspectives


This second campaign of common tests has begun the 2This second campaign of common tests has begun the 2thth april … april …

L0 Calorimeter mainly ready for global commissioning tests.

November test reproduced successfully for all the boards with ECAL, HCAL, PreShower, SPD Control and Validation boards. The major problems diagnosed last time are fixed.

The automated process for checking the cabling system is not generalized yet to all boards of the L0 chain. Final implementation in PVSS software not clear (interaction with ODIN, …)

Preparation of a document describing the cable test procedures (including optical cables) of the calorimeter trigger.

Preparation of one document summarizing the tests (already written for the first campaign).

common test for l0 calorimeter electronics (2 nd campaign) 4 april 2007 speaker : eric conte (lpc)

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