1. Muon Tomography Overview SUPERNEMO Tracker Electronics
David Urner
University of Manchester
Accelerator Physics / Dimensional Metrology: Oxford
B-Physics, Meon Spectroscopy: CLEO/Cornell
Muon g-2: Brookhaven/UIUC
Meson Spectroscopy: Crystal Barrel/LEAR/Zurich

2. Muon Tomography Overview
We need
large drift chambers
inexpensive
few readout channels
~mm type resolutions
Solution
OPAL muon chamber
single cell:
60 cm wide
up to 10 m long

3. Muon Tomography drift chamber
Developed in Manchester
Anode wire 5800V
~up to 1 μs drift time
expected resolution σx ~1mm
charge division σz ~ 5cm
Cathode 4000V
Strips shaping drift field
Induced field depends on avalanche position on diamond
improve noise behaviour by subtraction
large signal
on diamond
small signal
Cathode

4. Prototypes Roger Barlow Jo Pater Ray Thomson Julien Freestone
Andrew Elvin
Mike Perry
Scott Kolya
Minesh Patel
Richard Mudd
Matthew Currie
Andrew Cox

5. Muon Tomography Status
Scintillator
6 prototype chambers build
4 chambers equipped with electronics
Test data acquisition system
We see tracks
good efficiency ~97%
resolution limited by alignment (just needs effort)
Only anode and charge division so far
we do see the cathode hits

6. Plan for next year Order of 36 chambers Deliver Muon Tomography System
in July
in process hiring Chris Jackson
trigger
DAQ
analysis
needs effort of entire detector group to meet deadline

7. SUPERNEMO Tracker Electronics
Goal:
Develop system (with full detector in mind: 20’000 cells)
£50 per cell → highest electronics integration
development costs occur now
build enough electronics for 2000 cell demonstrator
Geiger counter:

8. SUPERNEMO Tracker Electronics
Goal:
Develop system (with full detector in mind: 20’000 cells)
£50 per cell → highest electronics integration
development costs occur now
build enough electronics for 2000 cell demonstrator
Geiger counter:
anode: transverse coordinate measurement g

9. SUPERNEMO Tracker Electronics
Goal:
Develop system (with full detector in mind: 20’000 cells)
£50 per cell → highest electronics integration
development costs occur now
build enough electronics for 2000 cell demonstrator
Geiger counter:
anode: transverse coordinate measurement

10. SUPERNEMO Tracker Electronics
Goal:
Develop system (with full detector in mind: 20’000 cells)
£50 per cell → highest electronics integration
development costs occur now
build enough electronics for 2000 cell demonstrator
Geiger counter:
anode: transverse coordinate measurement
cathode time: longitudinal coordinate measurement
~40 μs propagation over full length of wire:

11. SUPERNEMO Tracker Electronics
3 inputs per drift cell (2 cathodes 1 anode)!
Use differentiated anode signal + cathode: 2 input signals
James Mylroie-Smith
Anode Signal
differentiated anode signal
Limited by number of inputs that can be fit to the board
Amplifier/TDC board
ASIC for
18 cells
FPGA
TDC
I/O

12. SUPERNEMO Tracker Electronics

13. End

14. Muon Tomography Status
6 prototype chambers build
4 chambers equipped with electronics
Test data acquisition system
We see tracks
good efficiency ~97%
resolution limited by alignment (just needs effort)
Only anode and charge division so far
we do see the cathode hits