Advanced Implantation Detector Array (AIDA): Update & Issues

1. 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

2. AIDA: Current Status • DSSD request for tender • prototypes available 2008/Q3 • Prototype ASIC design • meeting design specifications • submission 2008/Q2 • FEE design underway • prototype available 2008/Q3 • liquid cooling required (cf. AGATA digitiser module) • Prototype testing • fully instrumented 8cm x 8cm DSSD • test experiments being considered for 2009

3. AIDA: Current Status • Evaluating • 10nF/100V capacitor arrays • long duration operation @ 400V • Analog Devices AD9252 14-bit/50MSPS ADC • FEE sampling ADC • DSSD response high energy heavy-ions • simulations Luigi Bardelli et al. • Texas A&M - November 2008 • MSL type W1(DS)-1000 34MeV/u 32Cl tr =100ns • GSI (100MeV/u) - March 2008? • higher energy, heavier ions predict tr > 400ns

4. Time Jitter • Transient signal analysis currently underway (realistic comparator design) • Preamplifier risetime ( Cf=0.6pF ) tr=110ns • LLD threshold 0.26% 20MeV FSR • 20MeV signal • jitter ~0.13ns rms ( ID=1nA ), ?ns rms ( ID=100nA ) • 0.2MeV signal • jitter ~2.7ns rms ( ID=1nA ), ~4.0ns rms ( ID=100nA ) • b events will normally trigger multiple strips ‘simultaneously’ • S/N improves as n1/2 • Highlights importance of • minimising detector – instrumentation separation • reduces noise and risetime • radiation damage mitigation • detector cooling

5. Outstanding Issues: approaching the Rubicon • Package size • 10cm x 26cm x 4cm (10cm x 10cm x 4cm) • Mechanical design concepts • 10cm x 26cm AIDA/ToF/Ge • 10cm x 26cm?? AIDA/4p Neutron Detector • 10cm x 10cm AIDA/TAS • … others? • Review ASIC Project Specification • DESPEC project requirements satisfied?

6. AIDA/ToF/Ge

7. AIDA/4p Neutron (NERO)

8. AIDA/TAS

9. Mechanical Design • STFC Daresbury Laboratory • professional 3D CAD/CAE engineering effort available • Propose STFC Daresbury Laboratory should be responsible for • mechanical design of • RISING (cluster detectors) array supports and stand • 4p Neutron detector stand/overall mechanical design of detector • TAS stand/overall mechanical design of detector • Fast Timing Array • Collaboration remains responsible for detector specification • STFC DL responsible for ensuring everything fits! • Assuming UK NUSTAR bid to STFC successful funds available for • stand construction, shipping and installation at GSI

10. 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 Specification ASIC Project Specification v1.3 FEE Specification v0.5 The University of Edinburgh (lead RO) Phil Woods et al. The University of Liverpool Rob Page et al. STFC DL & RAL John Simpson et al. Project Manager: Tom Davinson

11. 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)

13. AIDA: Resources & Tasks • Cost • Total announced value proposal £1.96M • Support Manpower • CCLRC DL c. 4.2 SY FEE PCB Design • DAQ h/w & s/w • CCLRC RAL c. 3.5 SY ASIC Design & simulation • ASIC Production • Edinburgh/Liverpool c. 4.5 SY DSSD Design & production • FEE PCB production • Mechanical housing/support • Platform grant support CCLRC DL/Edinburgh/Liverpool

14. 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-life • depends on DSSD segmentation and implantation rate/profile • Implantation profile • sx ~ sy ~ 2cm, sz ~ 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

15. AIDA: General Arrangement

16. Representative ASIC Noise Analysis Note – amongst other assumptions, we assume detector cooling • Minimise ballistic deficit • shaping time >10x tr • operate with t ~ ms • noise dominated by leakage current for ID > 10 nA

17. AIDA: Workplan

20. 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.