LN 2

1. LN2 Ge g XY table Experimental hall at the CSNSM Electronics tests in EMC environment Scanning Digital electronics Data segment and anode signals PC Linux +SDLT 370 MBq NAS 1.3 Tb Industrial PC

2. EMC controlled environment : electronics tests and scanning • XY table : supports 500 kg, 20 um pitch, x 300 mm labview controller ~ ready • Preliminary Electronics : GaGe (100 MHz, 12 bits / 50 MHz 14 bits) • 370 MBq 137Cs + collimator <= G4 simulations • « Tohr » collimator + NaI => coincidence measurements

3. 370 MBq 137Cs G4 simulations

4. Triangular modules - Stack of homothetical plates - Each plate is chemically etched F e 2r Positionning rods Focal point 2r = 400 µm F = 70 mm e = 16 mm d = 200 µm d ’ = 200 µm Tungten sheet Brace d’ d TOHR : High Resolution g Tomograph for small animals Structure of the collimator

5. Tohr Collimator

6. THE COMPLETE DETECTOR • Icosahedrical structure • 15 modules TOHR : High Resolution g Tomograph for small animals Design of the detector ONE MODULE Collimator Scintillator-NaI(Tl) PM tube housing HT and Electronics

7. TOHR : High Resolution g Tomograph for small animals Experimental set-up

8. The Cs Collimator