slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Advanced Implantation Detector Array (AIDA): Update & Issues PowerPoint Presentation
Download Presentation
Advanced Implantation Detector Array (AIDA): Update & Issues

Loading in 2 Seconds...

play fullscreen
1 / 13

Advanced Implantation Detector Array (AIDA): Update & Issues - PowerPoint PPT Presentation


  • 79 Views
  • Uploaded on

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.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Advanced Implantation Detector Array (AIDA): Update & Issues' - shay


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

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

slide2

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, a, b, g, bp, bn … decays
  • Measure half lives, branching ratios, decay energies …
  • Tag interesting events for gamma and neutron detector arrays
slide3

AIDA: DSSD Array Design

courtesy B.Rubio

  • 8cm x 8cm DSSDs
  • common wafer design for 8cm x 24cm and 8cm x 8cm configurations
  • 8cm x 24cm
  • 3 adjacent wafers – horizontal strips series bonded
  • 128 p+n junction strips, 128 n+n ohmic strips per wafer
  • strip pitch 625mm
  • wafer thickness 1mm
  • DE, 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
slide4

ASIC Design Requirements

Selectable gain 20 100020000 MeV FSR

Low noise 12 60050000 keV FWHM

energy measurement of implantation and decay events

Selectable threshold < 0.25 – 10% FSR

observe and measure low energy b, b detection efficiency

Integral non-linearity < 0.1% and differential non-linearity < 2% for > 95% FSR

spectrum analysis, calibration, threshold determination

Autonomous overload detection & recovery ~ ms

observe and measure fast implantation – decay correlations

Nominal signal processing time < 10ms

observe and measure fast decay – decay correlations

Receive (transmit) timestamp data

correlate events with data from other detector systems

Timing trigger for coincidences with other detector systems

DAQ rate management, neutron ToF

slide5

AIDA: Current Status

  • Prototype ASIC design
  • final design review this week
  • submission October 27
  • Prototype FEE design
  • engineering concepts established (specification v.1 available)
  • detailed engineering underway
  • liquid cooling required (cf. AGATA digitiser module)
  • Prototype testing
  • fully instrumented 8cm x 8cm DSSD
  • in-beam commissioning tests mid-2009
slide9

Oustanding Issues: 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
  • Evaluate prototype & review
slide10

Oustanding Issues: Threshold

  • Detailed simulation (with realistic component tolerances and behaviour)
  • shows random comparator offset variations in excess of minimum threshold
  • specification (0.25% of 20MeV FSR)
  • - design optimisation and minimisation
  • - design incorporates per channel offset correction via 6bit DAC
  • - evaluate prototype & review
slide11

Outstanding Issues: AIDA Enclosure

  • Design study by E.Reillo et al. (CIEMAT)
  • http://www.ph.ed.ac.uk/~td/AIDA/Meetings/12May2008/AIDA%20chamber.pdf
  • Comparison of s/steel, Al and C fibre materials
  • ‘Best’ option Al
  • 0.5mm entrance window (path to ToF n-detectors) desirable
  • Presumed satisfactory choice for Ge detectors
  • TAS? 4p neutron detector?
slide12

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 v1.0

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

slide13

Acknowledgements

This presentation includes material from other people

Thanks to:

Ian Lazarus & Patrick Coleman-Smith (STFC DL)

Steve Thomas & Davide Braga (STFC RAL)

Dave Seddon & Rob Page (University of Liverpool)

Berta Rubio (IFIC, CSIC University of Valencia)