1. X-ray data acquisition systems for Airport Security J M Homer Electron Tubes Ltd

2. Electron Tubes Ltd  Specialises in X-ray and light detection systems  UK based company  Products X-ray data acquisition systems Light detection modules Photomultipliers  Customers Security systems Instrumentation NDT systems Scientific research (HE Physics and Space)

3. Carry-on baggage scanner Checked baggage scanner Large baggage or contain e r scanner Airport security applications

4. Carry-on baggage scanner Linescan system Checked baggage scanner CT system Large baggage or container scanner Multi-view linescan system System types

5. Personal X-ray scanning Compton backscatter using photomultipliers

6. MaterialThickness mm Energy Range mm Signal outputSignal decay time Silicon0.35 – 25keVHighest signal, direct conversion 1µs Gadox (Tb)140gm/cm220 – 100keVSimilar to CsI2 – 3ms CsI (Tl)4.5mm40 – 160keVBest light output 2 components, long decay tail CdWO42.5mm – 30mm 150keV – 9Mev25% of CsI20µs X-ray detectors

7. X-ray linescan system

8. Single energy and dual energy detectors

9. X-ray CT system

10. Requirements of data acquisition system  Large number of channels, 2000 to 20000  Sub-millisecond scan time  Wide dynamic range  Digital output  Low noise  Low cost

11. XDAS system  charge integrating method  simultaneous data acquisition and read-out  on board sub-sampling and data summation  links to PC via USB2 or PCI-7300A data I/O card  s/w controllable via RS485 interface  system read-out rate 5MB/s

12. Single Channel of ASIC

13. XDAS module block diagram

14. XDAS system block diagram

15. XDAS V1X system  One digital board drives 20 detector head boards with 2560 channels  Multiple digital boards allow up to 30000 channels  System read-out rate up to 20MHz  Same capability as original XDAS system  Lower cost

16. XDAS-V1X detector head board

17. XDAS-V1X signal processing board block diagram

18. XDAS-V1X system block diagram

19. XDM System  modular system of any length  6mm detector pitch  suitable for use with high energy applications using Linacs  high charge capacity (1000pC)  20-bit output  1 bit of noise  high speed serial link to CPU  systems designed to order

20. summary  modular X-ray data acquisition systems  designed for use with linescan and CT X-ray systems large number of channels fast low noise low cost per channel  digital output  can be configured to meet specific requirements

21. solutions in light detection