1. SSD Status Before and After Dessica Installation Massimo Venaruzzo 04/10/2012 SSD – EN/CV Meeting

2. Outline SSD General Status Before Dessica Humidity Trends Before Dessica Half ladder leackage current before Dessica SSD General Status with Dessica Humidity Trends with Dessica Half ladder leackage current with Dessica Measurements performed by SSD people Conclusions

3. SSD General Status – Before Dessica 3 Off to prevent trips 11/144 (~8%) High tempNoise in the DQMFluctuating currentHigh current

4. Humidity Trends Before Dessica CR5 SSD-C (detector entrance)

5. Humidity Trends Before Dessica SSD-A (detector exit)

6. Half ladders leakage current before Dessica - 1 A607 (off) C609 (off)

7. Half ladders leakage current before Dessica - 2 A624 (kept on and used as reference) C601 (kept on and used as reference)

8. SSD General Status – With Dessica 8 Current still too high High tempHigh current

9. Humidity Trends With Dessica Dessica Startup Dessica alarm test P2 Power Cut SSD T Stable ~19.9 – 20.1 deg CR5 SSD-C

10. Humidity Trends With Dessica SSD-A Dessica Startup Techincal Stop 3

11. Half ladders leakage current with Dessica - 1 A607 C609

12. Half ladders leakage current with Dessica - 2 A624 C601

13. Critical Ladder Currents: Overall situation LadderP HV (uA) (Fisair) N HV (uA) (Fisair) P HV (uA) (Dessica) N HV (uA) (Dessica) Variation A601350 165167- 53 % A607300 259263- 13 % A609290 200203- 45 % A610320 197200- 37.5 % A615300 197200- 33 % A616150 90 - 40 % A622450 267268- 40 % A624215 132129- 39.5 % A636180 145142- 19.4 % C601420 298 - 29 % C607150 97 - 35 % C609340 230 - 32.4 % C610400 230290- 42.5/27.5 % C61590 68 - 24.4 % C61780 66 - 17.5 % C622250 164 - 34.4 % C62480 47 - 41.3 % C632310350173236- 44.2/32.6 % C634120 56 - 53.3 % C636150 90 - 40 % Off

14. Measurements performed by SSD - 1 04/09, 16:30 - Dessica started with this setpoints: - RH: 15% (--> 2.03 g/kg) - T: 19 deg (measured near the machine ~18.3 deg, decreased to ~16.6 in the following days) - Flow measured ~314 m^3/h that increased to ~330 m^3/h in the following hours - P measured ~1.5 kPa - SSD C2-sensor RH (at the detector entrance): ~26% - SSD A -sensor RH (at the detector exit) : ~26% - A624: 195 uA - C601: 400 uA 07/09, 09.30 - Flow reduced to ~ 300 m^3/h, other parameters fixed - P measured: 1.26 kPa - SSD C2-sensor RH: ~20.3% - SSD A -sensor RH: ~21.5% - A624: 180 uA - C601: 375 uA

15. 10/09, 09.30 - RH setpoint reduced to 10% (-->1.35 g/kg), other parameters fixed - SSD C2-sensor RH: ~16% - SSD A -sensor RH: ~18% - A624: 160 uA - C601: 332 uA 11/09, 09.30 - Flow reduced to ~ 250 m^3/h (the nominal one), other parameters fixed - P measured: 0.864 kPa - SSD C2-sensor RH: ~16.8% - SSD A -sensor RH: ~17.9% - A624: 157 uA - C601: 327 uA Measurements performed by SSD - 2 Cleaness measurements ≥0,5μm particles/m³reduction CR5 areaFisair outlet Dessica- CR5% 2531154 894.34635319.08198 ISO 8ISO 4ISO 6 meter per m³ class

16. Flow reduction ~ 78.3% Flow reduction ~78.5% Measurements performed by SSD - 3 flow [m³/h] total flow [m ³ /h] ITS env. SPD SDDSSD Blue BLUE transpar entblack 10 3 0013 flow [m³/h] total flow [m ³ /h] ITS env. SPD SDDSSD Blue BLUE transpar entblack 26 7 01549 flow [m³/h] total flow [m ³ /h] ITS env. SPD SDDSSD Blue BLUE transpar entblack 36 10 01864 flow [m³/h] total flow [m ³ /h] ITS env. SPD SDDSSD Blue BLUE transpar entblack 42 12 02376 Dessica flow 150 m³/h Dessica flow 350 m³/h Dessica flow 300 m³/h Dessica flow 250 m³/h Flow reduction ~ 91% Flow reduction ~ 80%

17. SSD – C side (detector entrance) during SSD measurements Fisair machine Dessica Startup T=19deg, RH set = 15%, Flow ~330 m 3 /h Dessica alarm test Flow  300 m 3 /h, rest fixed Flow  250 m 3 /h, rest fixed RH  10%, rest fixed SSD T Stable ~19.9 – 20.1 deg

18. Conclusions SSD condition significantly improved : – RH stable at the requested values – Critical half-ladders current decrasing (a complete stabilization needs more working weeks at the proper RH conditions) Further interventions – Leak check then redo the flow measurements – Pipe insulation (to gain in terms of air temperature at the detector), Dessica settings to be kept: 250 m 3 /h, RH 10% (1.35 g/kg)

19. BackUp

20. SSD Humidity Sensor 04 September – 11 September

21. Humidity in CR5

22. SSD – C side (detector entrance) Fisair machine Dessica Startup T=19deg, RH set = 15%, Flow ~330 m 3 /h Dessica alarm test Flow  300 m 3 /h, rest fixed Flow  250 m 3 /h, rest fixed RH  10%, rest fixed

23. SSD – A side (detector exit) Dessica Startup RH  10%, rest fixed Fisair machine Flow  250 m 3 /h, rest fixed Flow  300 m 3 /h, rest fixed

24. Flow Measurements

25. FISAIR FLOW setting of supplyAir speed in tube[km/h]flow [m³/h ]part of demand [%] total flow [m ³ /h] [m³/h]ITS env. SPD SDDSSD ITS env. SPD SDDSSD ITS env.SPDSDDSSD Blue BLUE transpare ntblackBlue BLUE transpa rentblackBlue BLUE transpar ent blac k inside L322 02544 12 02344 ?? 04579 Jan 2012 - FISAIR flow 250 m³/h setting of supplyAir speed in tube[km/h]flow [m³/h ]part of demand [%]total flow [m ³ /h] [m³/h]ITS env. SPD SDDSSD ITS env. SPD SDDSSD ITS env.SPDSDDSSD Blue BLUE transpare ntblackBlue BLUE transpa rentblackBlue BLUE transpar ent blac k inside L336 03872 20 03472 ?? 069127 Sep 2010 - FISAIR flow 250 m³/h

26. DESSICA FLOW Dessica flow 150 m³/hmearured on 19-09-2012 by Mino and Grazia setting of supplyAir speed in tube [km/h] flow [m³/h] total flow [m ³ /h] [m³/h]ITS env. SPD SDDSSDITS env. SPD SDDSSD Blue BLUE transparentblackBlue BLUE transpare ntblack inside L35 5 0010 3 0013 Dessica flow 250 m³/h setting of supplyAir speed in tube [km/h] flow [m³/h] total flow [m ³ /h] [m³/h]ITS env. SPD SDDSSDITS env. SPD SDDSSD Blue BLUE transparentblackBlue BLUE transpare ntblack inside L313 01726 7 01549 Dessica flow 300 m³/h setting of supplyAir speed in tube [km/h] flow [m³/h] total flow [m ³ /h] [m³/h]ITS env. SPD SDDSSDITS env. SPD SDDSSD Blue BLUE transparentblackBlue BLUE transpare ntblack inside L318 02036 10 01864 Dessica flow 350 m³/h setting of supplyAir speed in tube [km/h] flow [m³/h] total flow [m ³ /h] [m³/h]ITS env. SPD SDDSSDITS env. SPD SDDSSD Blue BLUE transparentblackBlue BLUE transpare ntblack inside L321 02542 12 02376

27. Cleaness Measurements

28. FISAIR machine setting of supply≥0,3μm particles/m³reduction≥0,5μm particles/m³reduction [m³/h] outside magnet inside magnet air from tube% outside magnet inside magnet air from tube% meter32019000330040 150030010 per m³ 6.713.7811.166.07814.13499530.035106.0073.53497 class --ISO 6 ISO 9ISO 7ISO 5 2009 2012 setting of supply≥0,3μm particles/m³reduction≥0,5μm particles/m³reduction [m³/h] outside magnet inside magnet air from tube%CR5 areaFisair outlet Dessica- CR5% meter320 2531154 per m³ 000#DIV/0!894.34635319.08198 class --ISO 6 ISO 8ISO 4ISO 6 FISAIR – DESSICA machine

29. SSD Reference Current

30. LadderP HV (uA) (Fisair) N HV (uA) (Fisair) P HV (uA) (Dessica) N HV (uA) (Dessica) Reference (uA) (Oct-Nov 2011) A601350 165167~ 150 A607300 259263~ 150-170 A609290 200203~ 150 A610320 197200~ 150 A615300 197200~ 130-140 A616150 90 ~50 A622450 267268~ 250 A624215 132129~ 80 A636180 145142~ 80-90 C601420 298 ~ 180-200 C607150 97 ~ 90 C609340 230 ~ 150 C610400 230290~ 200/250 C61590 68 ~ 30-40 C61780 66 ~ 30-40 C622250 164 ~ 120 C62480 47 ~ 30 C632310350173236~ 50-150 C634120 56 ~ 50 C636150 90 ~ 70