agata: status of the implementation and performance a. gadea (ific, csic-univ. valencia) for the...
TRANSCRIPT
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.