AGATA:

Status of the Implementation

and Performance A. Gadea (IFIC, CSIC-Univ. Valencia)

for the AGATA collaboration

Tracking Arrays based onPosition Sensitive Ge Detectors

Large Arrays based on Compton Suppressed Spectrometers

10 — 5 % ( M=1 M=30)

EUROBALL

EXOGAM MINIBALL

Compact Arrays optimized Doppler correction, low M

AGATA

20 % M=1

40 — 20 % ( M=1 M=30)

Advantages of -ray tracking

• Efficiency – Proper reconstruction of scattered gamma rays, no solid angle used for Anti-Compton shield

• Peak-to-background – Reject Partially absorved events

• Doppler correction - Position of first interaction determined

• Polarization – Angular distribution of the scattering sequence

• Counting rate – high segmentation and digital pile-up treatment

Compton Suppresion

Gamma Tracking

Concept ofConcept of -Tracking-Tracking

Pulse Shape Analysisto de-convolute the

recorded wavesDAQ PSA - FARM

Highly segmented HPGe detectors

NOVEL PRE-AMPS

Identified interaction points

(x,y,z,E,t)i

Reconstruction of interaction tracks

(tracking algorithms on interaction points)

DAQ TRACKING-FARM

Synchronized digital electronics

record and process the segment signals

DIGITIZERS +PRE-PROCESSING

On-line reconstruction of -rays

6660 high-resolution digital electronics channels

High throughput DAQ

Pulse Shape Analysis position sensitive operation mode

-ray tracking algorithms to achieve maximum efficiency

Coupling to complementary detectors for added selectivity

180 hexagonal crystals 3 shapes 60 triple-clusters all equalInner radius (Ge) 23.5 cmAmount of germanium 362 kgSolid angle coverage 82 %36-fold segmentation 6480 segmentsSingles rate ~50 kHz

Efficiency: 43% (M=1) 28% (M=30)Peak/Total: 58% (M=1) 49% (M=30)

AGATAAGATA(Advanced GAmma Tracking Array)

Encapsulation

AGATA 180

E. Farnea, et al. doi: 10.1016/j.nima.2010.04.043.

AGATA + Inner Complementary Instrument

Reaction chamber made with aluminium 2mm thickShell of silicon 1mm thick and a shell of CsI 5mm thick

AGATA – Complementary Detectors W.G. (E.Farnea M.Palacz)

PSA + TRACKING

EUCLIDES 1mm Si DIAMANT 5mm CsI

Sen

sib

ilit

y as

fra

ctio

n o

f re

acti

on

ch

ann

el

Spin ħ

Pulse Shape Simulations Th. Kröll, A. Görgen

A.Wiens et al. NIMA 618 (2010) 223E.Farnea et al. NIMA 621 (2010)331

Segmentation of the AGATA detector

Implementation in GEANT4

Asymmetric AGATA Triple Cryostat

Challenges: - mechanical precision - heat development, LN2 consumption - microphonics - noise, high frequencies

- integration of 111 high resolution spectroscopy channels- cold FET technology for all signals

Experimental Campaign at Legnaro

Plan for AGATA

Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

LegnaroSetupPhysicsNo. detectors 18-21

GSIMove/SetupPhysicsNo. detectors 30-36

GANILMove/SetupPhysicsNo. detectors 48-60

20142009 2010 2011 2012 2013

Current planning

Simulations for the GSI set-up

+ =

AGATA S2 Geometry

10 ATC + 5 double Cluster

Detectors• 3 symmetric detector delivered early R&D phase• 15 asymmetric capsules ordered R&D phase• 17 asymmetric capsules ordered present phase• 14 operational• More orders (France and Italy soon)• 9 triple cryostats ordered 4(5) operational• + 5 B and C capsules from the GSI phase• 5 test cryostats available (scanning, CAT tests,

electronics tests.)• Double cryostats for the GSI phase

Data Flow in AGATA Rates @ 50 kHz singles

100 B/ev

5 MB/s

200 MB/s

1.5 ··· 7.5 kB/ev

~ 100 MB/s

36+1 7.5 kB/event

380 MB/s

~ 200 B/segment~ 10 MB/s

100 Ms/s

14 bits

Pulse Shape Analysis

Event Builder

-ray Tracking

HL-Trigger, Storage On Line Analysis

< 100 MB/s

SEGMENT

GLOBAL

Energy & Classification

5*n max. 900 MB/s

save 1600 ns ofpulse

E, t, x, y, z,...DETECTOR

LL-Trigger

Suppression /Compression

ADC

Preprocessing

+-

GL-Trigger

GLobal-Trigger to reduce event rate to what PSA is able to manage

Structure of Electronics and DAQ

TRACKINGControl,Storage…

EVENT BUILDER

PSA FARM

Core +36 seg.

GL Trigger

Clock100 MHzT-Stamp

Other detectors

Fast 1st Level Trigger

interface to GTS, merge time-stamped data into event builder, prompt local trigger from digitisers

DetectorLevel

Other Detectors

Diff. Fast-reset-TOT 75.5db SNR 12.2 ENOB

GTS

DIGITIZERPREAMPL.

ATCA Carrier

GTS

Global LevelDAQ-NARVAL

RUN- & SLOW-Control

HIGH THROUGHTPUT PRE-PROCESSING

CARRIER / MEZZANINES

Other detectors

INFN-MI/GANIL/KÖLN IPHC/Liverpool/ STFC

IPNO/CSNSM/INFN-Pd

IPNO/CSNSM/LNL/GANIL/IFJ-PAN

INFN-Pd

Digital preamplifier concept

200MB/s/ segment

100MB/s/detector

Electronics and Data Acquistion

• Preamplifiers • Digitizers• Pre-processing• Trigger• NARVAL DAQ (tracking, storage, GUI)

• Ready for 5 x Triple Clusters and 5 x Duoble Clusters by the end of 2011

The AGATA Trigger System

•Tree Structure Based on the GTS Mezzanines

•Trigger Logic Build in the Global Trigger Processor

•Possibility to Define Partitions for Different Detectors or Groups of Detectors

•The logic:•Multiplicity conditions within each partition•Prompt or Delay Logical Conditions Involving more partitions

M. Bellato, L. Berti, J. Chavas, INFN-Pd and LNL

Global Processor:Sequential Batcher Sorting + Multiplicity Processing

Partitions Coincidence

• Prompt and delayed• Case study:

– M(Ge) >= N and M(Other Detector) >= K before/after deltaT

M. Bellato, L. Berti, J. Chavas, INFN-Pd and LNL

AGATA and the Complementary

Instrumentation

Analogue vs Digital Electronics

Detector(Germaniu

m)

Detector(Germaniu

m)

Shaping AmplifierShaping Amplifier

CFDCFD DA

Q

E

t

FADCFADC

MWD

DCFD

Filters

DA

Q

E

t

ADCADC

TDCTDC

PS

A

Tra

ckin

g

E

t

x,y,z

E

t

Standard Arrays

AGATA

Segment Detector Array

Detector(Germaniu

m)

Detector(Germaniu

m)

AGATA and Other Detectors (standard electronics)

OtherVME

GTS supervisor

Event Builder

PSA

Pre-processing

OtherReadout

Digitizer

TrackingOnline analysis

Storage

GTS local

Other Analogue

prompt trigger

REQ

VAL

REQ

VAL

Ancillary Merge Pre-processing

Trigger

AGAVA IFJ-PAN

NARVAL DAQ

IPN-Orsay, CSNSM-OrsayINFN-LNL,GANIL,IFJ-PAN-Crakow

Advanced Data Flow system developed in ADA

AGAVA VME card

GTS transceiverFPGA VIRTEX 2

VME backplane connector

Optolink to GTSEthernet

IFJ-PANIFJ-PAN,, Krak Krakóów & INFN-Milanow & INFN-Milano

Agava Interface Front Panel contains:

•Inputs:Trigger request (“external”) (NIM standard)Back pressure (NIM standard)

•Outputs:Busy (NIM standard)Local Trigger (NIM standard) Rejection Trigger (NIM standard)Validation Trigger (NIM standard)Timeout (NIM standard)Inspection_1 (NIM standard) Data ready comes in Inspection linesInspection_2 (NIM standard)Inspection_3 (NIM standard)Inspection_4 (NIM standard)Clock 100 MHz (LVDS) Metronome and Shark link connectors  Ethernet and Optical Fiber Clock Access to the GTS Mezzanine card.

Implemented Firmware 12a

Not Implemented

AGATA-Demonstrator PRISMA DAQ cycle

(PRELIMINARY)

AGATA DAQ: NARVAL

IPN-Orsay, CSNSM-OrsayINFN-LNL,GANIL,IFJ-PAN-Crakow,

IPN-Lyon

Advanced Data Flow

system developed

in ADA

Root GUI for analysis

NARVAL Producer Front End Electronics

NARVAL Producer Front End Electronics

Pre ProcessingPre Processing

Pulse Shape Analysis

Pulse Shape Analysis

Event BuildingEvent Building

TrackingTracking

ConsumerConsumer

AGATA Crystal AGATA Crystal

NARVAL Producer Complementary detectorsNARVAL Producer

Complementary detectors

RUN GUI

AGATA and the complementary Detectors

•AGATA has provided a way to intruduce complementary detectors in the Trigger and synchronization tree. The data are merged through the clock Tag or event number Tag.

•Nevertheless fully Digital electronics is fundamental to gain from the full capabilities of the AGATA system regarding the almost full pipelined Electronics and DAQ and the high rate capabilities.