advanced implantation detector array (aida): update & issues
DESCRIPTION
Advanced Implantation Detector Array (AIDA): Update & Issues. presented by Tom Davinson on behalf of the AIDA collaboration (Edinburgh – Liverpool – STFC DL & RAL). Tom Davinson School of Physics The University of Edinburgh. DESPEC: Implantation DSSD Concept. - PowerPoint PPT PresentationTRANSCRIPT
Advanced Implantation Detector Array (AIDA):Update & Issues
Tom DavinsonSchool of PhysicsThe University of Edinburgh
presented byTom Davinson
on behalf of the AIDA collaboration(Edinburgh – Liverpool – STFC DL & RAL)
DESPEC: Implantation DSSD Concept
• SuperFRS, Low Energy Branch (LEB)• Exotic nuclei – energies ~ 50 – 200MeV/u• Implanted into multi-plane, highly segmented DSSD array• Implant – decay correlations• Multi-GeV DSSD implantation events• Observe subsequent p, 2p, , , , p, n … decays• Measure half lives, branching ratios, decay energies …• Tag interesting events for gamma and neutron detector arrays
Implantation DSSD Configurations
Two configurations proposed:
a) 8cm x 24cm “cocktail” mode many isotopes measured simultaneously
b) 8cm x 8cm high efficiency mode concentrate on particular isotope(s)
AIDA: DSSD Array Design
• 8cm x 8cm DSSDscommon wafer design for 8cm x 24cm and 8cm x 8cm configurations
• 8cm x 24cm3 adjacent wafers – horizontal strips series bonded
• 128 p+n junction strips, 128 n+n ohmic strips per wafer• strip pitch 625m• wafer thickness 1mm• E, Veto and up to 6 intermediate planes
4096 channels (8cm x 24cm)• overall package sizes (silicon, PCB, connectors, enclosure … )
~ 10cm x 26cm x 4cm or ~ 10cm x 10cm x 4cm
courtesy B.R
ubio
ASIC Design Requirements
Selectable gain 20 1000 20000 MeV FSRLow noise 12 600 50000 keV FWHM
energy measurement of implantation and decay events
Selectable threshold < 0.25 – 10% FSRobserve and measure low energy detection efficiency
Integral non-linearity < 0.1% and differential non-linearity < 2% for > 95% FSRspectrum analysis, calibration, threshold determination
Autonomous overload detection & recovery ~ sobserve and measure fast implantation – decay correlations
Nominal signal processing time < 10sobserve and measure fast decay – decay correlations
Receive (transmit) timestamp datacorrelate events with data from other detector systems
Timing trigger for coincidences with other detector systemsDAQ rate management, neutron ToF
Schematic of Prototype ASIC Functionality
Note – prototype ASIC will also evaluate use of digital signal processing
Potential advantages• decay – decay correlations to ~ 200ns• pulse shape analysis• ballistic deficit correction
Design Study Conclusions
• 4’’ or 6” Si wafer technology?- integrated polysilicon bias resistors (15M)- separate coupling capacitors (require 22nF/200V+)
• Radiation damage mitigation measures essential- detector cooling required
• Noise specification (12keV FWHM) … “not unreasonable”
• Discriminator - low threshold (<50keV) – slow, compromised for ID > 100nA- separate timing discriminator – higher threshold
• x1000 overload recovery ~ s achievable- depends on input pulse shape- optimisation requires more information
AIDA Design Concept
Detail of DSSSD detector layers and detector enclosure
Beam
courtesy Dave Seddon & Rob Page, University of Liverpool
AIDA: Current Status
• Edinburgh – Liverpool – CCLRC DL – CCLRC RAL collaboration
- 4 year grant period- DSSD design, prototype and production- ASIC design, prototype and production- Integrated Front End FEE PCB development and production- Systems integration- Software development
Deliverable: fully operational DSSD array to DESPEC
• Proposal approved & fully funded - project commenced August 2006
• Detailed specification published November 2007 • Technical Specification release to project engineers January 2007
• Detailed ASIC design & engineering underway
AIDA: Resources & Tasks
Cost
• Total announced value proposal £1.96M
Support Manpower
• CCLRC DL c. 4.2 SY FEE PCB DesignDAQ h/w & s/w
• CCLRC RAL c. 3.5 SY ASIC Design & simulationASIC Production
• Edinburgh/Liverpool c. 4.5 SY DSSD Design & productionFEE PCB productionMechanical housing/support
• Platform grant support CCLRC DL/Edinburgh/Liverpool
AIDA: Current Status
• DSSD request for tender
• Prototype ASIC design submission 2008/Q1
• FEE design underway
liquid cooling required (cf. AGATA digitiser module)
• Evaluating
10nF/100V capacitor arraysAnalog Devices AD9252 14-bit/50MSPS ADC
• DSSD response high energy heavy-ions
simulations Luigi Bardelli et al.Texas A&M (40MeV/u) November 2008GSI (100MeV/u) March 2009
Outstanding Issues: approaching the Rubicon
• Package size10cm x 26cm x 4cm (10cm x 10cm x 4cm)
• Mechanical design concepts
10cm x 26cm AIDA/ToF/Ge10cm x 26cm AIDA/4 Neutron Detector10cm x 10cm AIDA/TAS
… others?
• Review ASIC Project Specification
DESPEC project requirements satisfied?
AIDA/ToF/Ge
AIDA/4 Neutron (NERO)
AIDA/TAS
AIDA Project Information
Project web site
http://www.ph.ed.ac.uk/~td/AIDA/welcome.html
Design Documents
http://www.ph.ed.ac.uk/~td/AIDA/Design/design.html
Project Technical SpecificationASIC Project Specification v1.3FEE Specification v0.5
The University of Edinburgh (lead RO)Phil Woods et al.
The University of LiverpoolRob Page et al.
STFC DL & RALJohn Simpson et al.
Project Manager: Tom Davinson
Acknowledgements
This presentation includes material from other people
Thanks to:
Ian Lazarus & Patrick Coleman-Smith (STFC DL)Steve Thomas (STFC RAL)Dave Seddon & Rob Page (University of Liverpool)Berta Rubio (IFIC, CSIC University of Valencia)
Implantation – Decay Correlation
• DSSD strips identify where (x,y) and when (t0) ions implanted
• Correlate with upstream detectors to identify implanted ion type
• Correlate with subsequent decay(s) at same position (x,y) at times t1(,t2, …)
• Observation of a series of correlations enables determination of energy distribution and half-life of radioactive decay
• Require average time between implants at position (x,y) >> decay half-lifedepends on DSSD segmentation and implantation rate/profile
• Implantation profilex ~ y ~ 2cm, z ~ 1mm
• Implantation rate (8cm x 24cm) ~ 10kHz, ~ kHz per isotope (say)
• Longest half life to be observed ~ seconds
Implies quasi-pixel dimensions ~ 0.5mm x 0.5mm
AIDA: General Arrangement
Representative ASIC Noise Analysis
• Minimise ballistic deficitshaping time >10x tr
operate with ~ snoise dominated by leakage current for ID > 10 nA
Note – amongst other assumptions, we assume detector cooling
AIDA: Workplan
Daughtercard
connector
16 channelASIC
9222ADFADC
9222ADFADC
16 bitADC
Singleto
diffn.
16
1
2I C controls
N 2 2222222222222 22222222
Readout controlsClocksReset
10LVDS 20 pins
10LVDS 20 pins
4
- - AIDA FEE Support connections and parts for one chip
Power Supplies
Daughtercard
connector
16 channelASIC
9222ADFADC
9222ADFADC
16 bitADC
Singleto
diffn.
16
1
2I C controls
N 2 2222222222222 22222222
Readout controlsClocksReset
10LVDS 20 pins
10LVDS 20 pins
4
Daughtercard
connector
16 channelASIC
9222ADFADC
9222ADFADC
16 bit ADC
Singleto
diffn.
16
1
2I C controls
N 2 2222222222222 22222222
Readout controlsClocksReset
10LVDS 20 pins
10LVDS 20 pins
4
Daughtercard
connector
16 channelASIC
9222ADFADC
9222ADFADC
16 bit ADC
Singleto
diffn.
16
1
2I C controls
N 2 2222222222222 22222222
Readout controlsClocksReset
10LVDS 20 pins
10LVDS 20 pins
4
Daughtercard
connector
16 channelASIC
9222ADFADC
9222ADFADC
16 bit ADC
Singleto
diffn.
16
1
2I C controls
N 2 2222222222222 22222222
Readout controlsClocksReset
10LVDS 20 pins
10LVDS 20 pins
4
Xilinx 4 25XC VLX - 688FF 448 I/O
344 4used forASICS 6Timestamp and controls =
6Slow control = 22 22222= 3 2 ,
16 , 4address controls 16Logic Inspection :
: 32leaves spare
Timestamp clock and controls
Slow control interface
Readout interface
4 12XCV FX 320 /I O
Control of the FEE with operating PPC and readout to DAQ with 1 2222: 3 0
SDRAM 8 32Mx : 58 pinsSystemACE : 40 pinsFLASH2 16Mx : 43 pins4ASICs : 64 pins4ASICs : 64 pins
: 2Console pins : 6Timestamp pins
: 4Oscillator pins : 311Total pins
TEMACPHY
32MBSDRAM
SystemACE
FLASH for boot load of
LINUX
Connection forexternal
development CF
45RJ
Timestampexternalinterface
Consoleinterface
Oscillators
Timesta
mpandcontro
ls
Slowcontro
lInt erfa
ce
ReadoutInterfa
ce
- -AIDA FEE ASIC to DAQ block diagram
FPGA & FADCs
FPGA & FADCs
Water cooled metal
Water cooled metal
FPGA & FADCs
FPGA & FADCs
Water cooled metal
Water cooled metal
Water cooled metal
Water cooled metal
Water cooled metal
Water cooled metal
8cms
4cm
s
8Area required for x eightchannel FADCs with one single
to differential buffer perchannel
Allows space for routing the input signals for the second
row of buffers away from the high speed output signals of
the first row.
9cm
s
FPGA for ASIC event readout and slow control
FPGA containing PPC to transfer events to Acquisition computers.
4Mezzanine withASICS
Diagram (above) of the FEE boards as they would fit in the vertical plane. The grey rectangles are heat conductive foam pads which conform to the component outlines and conduct the heat to the water cooled metalwork. The green is pcb, the orange is a Samtec 80 pin connector with a 2.3mm height and the dark brown is the ASIC. The connections to the detector will be on the mezzanine boards to the left and to the acquisition network computers and BUTIS on the right. These are not shown.
Diagram ( alongside) shows the layout of a sub-board.