1. Readout principle Time Drift direction E drift Continuously sensitive Self-triggering Equiv. input charge due to noise:

2. Cooling system Cooling panels Commercial Insulation LN 2 pumps Two LN 2 circulation pumps, max speed 24 m 3 /hr, max head 5 bar Drawing pannel

3. Internal detector view Wire Chamber Side A Wire Chamber Side B Drift distance 2 x 1.5 m Cathode

4. Run 975, Event 118 Collection Right 92 cm 53 cm Muon decay

5. Run 969, Event 18 Collection Right 73 cm 42 cm 43 cm V 0 candidate 50 cm

6. Run 975, Event 15 Collection Left 395 cm 174 cm Multiple Shower 14 m 153 cm Run 975, Event 143 Collection Left

7. Multiple muons + multiple showers Run 975, Event 146 Collection Right 920 cm 185 cm 16,4 m Run 975, Event 133 Collection Right 174 cm

8. Run 975, Event 157 Collection Right 706 cm 170 cm Big Shower Run 961, Event 16 Collection Right 176 cm 434 cm

9. 158 MeV 752 MeV  = 141 o M inv = 650 MeV Run 975, Event 151 M inv =140 MeV Collection view Pi zero candidate (preliminary)  = 25 o 140 MeV Reconstruction of  -showers (error evalulation in progress)

10. Detector’s performance (cont.) Collection view Run 939 Event 95 Induction 2 view A B C D K+ µ+µ+ e+ A A B B C C AB BC K+ µ+ Run 939 Event 46 Particle identification by characteristic decay (µ +,µ -,K +,K -, K o ) µ+µ+ e+ µ+µ+

11. Induction 2 view Collection view Box dimensions: 42 x 14 x14 cm E e reconstructed = 45 MeV Run 939 Event 95

12. Electron from  decay measurement

13. GOK (God Only Knows…) …… and may be some theorist ≈15 cm ≈25 cm

14. Shock Absorbers Aux. UnitsT600 T600 Installation in LNGS

15. Aux. UnitsT600 T600 Installation in LNGS

16. The T3000 Detector