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SSD Status Before and After Dessica Installation

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

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SSD Status Before and After Dessica Installation

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

  2. Outline • SSD General Status BeforeDessica • HumidityTrendsBeforeDessica • HalfladderleackagecurrentbeforeDessica • SSD General Status withDessica • HumidityTrendswithDessica • HalfladderleackagecurrentwithDessica • MeasurementsperformedbySSD people • Conclusions

  3. SSD General Status – BeforeDessica Off topreventtrips 11/144 (~8%) Fluctuatingcurrent High temp High current Noise in the DQM

  4. HumidityTrendsBeforeDessica CR5 SSD-C (detector entrance)

  5. HumidityTrendsBeforeDessica SSD-A (detector exit)

  6. HalfladdersleakagecurrentbeforeDessica - 1 A607 (off) C609 (off)

  7. HalfladdersleakagecurrentbeforeDessica - 2 A624 (kept on and usedasreference) C601 (kept on and usedasreference)

  8. SSD General Status – WithDessica Currentstilltoo high High temp High current

  9. HumidityTrendsWithDessica CR5 SSD T Stable ~19.9 – 20.1 deg SSD-C DessicaStartup P2 Power Cut Dessicaalarm test

  10. HumidityTrendsWithDessica DessicaStartup SSD-A Techincal Stop 3

  11. HalfladdersleakagecurrentwithDessica - 1 A607 C609

  12. HalfladdersleakagecurrentwithDessica - 2 A624 C601

  13. Off CriticalLadderCurrents: Overall situation

  14. Measurementsperformedby 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. Measurementsperformedby SSD - 2 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 Cleanessmeasurements

  16. Measurementsperformedby SSD - 3 Dessica flow 150 m³/h Flow reduction ~ 91% Dessica flow 250 m³/h Flow reduction ~ 80% Dessica flow 300 m³/h Flow reduction ~78.5% Dessica flow 350 m³/h Flow reduction ~ 78.3%

  17. SSD – C side (detector entrance) during SSD measurements DessicaStartup T=19deg, RH set = 15%, Flow ~330 m3/h SSD T Stable ~19.9 – 20.1 deg Dessicaalarm test Flow  250 m3/h, restfixed Flow  300 m3/h, restfixed RH  10%, restfixed Fisairmachine

  18. Conclusions • SSD conditionsignificantlyimproved: • RH stable at the requestedvalues • Criticalhalf-ladderscurrentdecrasing (a complete stabilizationneeds more workingweeks at the proper RH conditions) • Furtherinterventions • Leakcheckthenredo the flow measurements • Pipe insulation (togain in termsof air temperature at the detector), • Dessicasettingstobekept: 250 m3/h, RH 10% (1.35 g/kg)

  19. BackUp

  20. SSD HumiditySensor 04 September – 11 September

  21. Humidity in CR5

  22. SSD – C side (detector entrance) DessicaStartup T=19deg, RH set = 15%, Flow ~330 m3/h Dessicaalarm test Flow  250 m3/h, restfixed Flow  300 m3/h, restfixed RH  10%, restfixed Fisairmachine

  23. SSD – A side (detector exit) DessicaStartup Flow  250 m3/h, restfixed Flow  300 m3/h, restfixed RH  10%, restfixed Fisairmachine

  24. Flow Measurements

  25. FISAIR FLOW Sep 2010 - FISAIR flow 250 m³/h Jan 2012 - FISAIR flow 250 m³/h

  26. DESSICA FLOW

  27. CleanessMeasurements

  28. FISAIR machine 2009 FISAIR – DESSICA machine 2012

  29. SSD ReferenceCurrent

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