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Irradiation Tests Module 3B

Irradiation Tests Module 3B. L-wire 64. L. U. 485cm. 1. Position. Irradiate small area: 2x2 cm 2 , with 2 mCu 90 Sr, 2 cm distance (~200 nA). Many tests, see last slide for overview. NB: gas flow from Upper to Lower. Source profile. Gas flow. History Module 3. Construction:

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Irradiation Tests Module 3B

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  1. Irradiation Tests Module 3B L-wire 64 L U 485cm 1 Position Irradiate small area: 2x2 cm2, with 2 mCu 90Sr, 2 cm distance (~200 nA) Many tests, see last slide for overview NB: gas flow from Upper to Lower Source profile Gas flow

  2. History Module 3 • Construction: • 12 May 2004 • Flushed with Ar/CO2, 10 l/hr: • 9 June 2006 – 29 June 2004 • (Humidity of gas on input : Tdew=-76 0C, 17 June 2004) • 18 June 2004: Tdew=-22 0C • 22 June 2004: Tdew=-33 0C • 29 June 2004: Tdew=-35 0C • Total gas flow ~4800 liter • Medium Scale Test: flushed in C-frame, 76 l/hr (7 modules) • 7 April 2005 – End of May • ~7500 liter • Flushed with Ar/CO2, 10 l/hr (2.5 – 20): • 6 Jan 2006 – present • Date Time Tmitchell Tcorrected H20 content(ppm) • 23-1-2006 18h28 -38 -35.5 212.3 • 24-1-2006 9h26 -41 -37.89 163.4 • 24-1-2006 18h25 -41 -37.89 163.4 • 25-1-2006 -43.8 -41.00 115.6 • 26-1-2006 16h26 -48 -45.66 67.1 • ~5000 liter NB: Remarkably, the humidity of the module did not increase between 2004 and 2006 !

  3. VI: Module 3B90Sr scan before and after 1st irradiation Module irradiated at 486 cm from lower end

  4. VI: Module 3B90Sr scan before and after 1st irradiation After irradiation: Before irradiation: Ratio: Irr/Non-irr: Source position: 484cm

  5. VI: Module 3B90Sr scan before and after 2nd irradiation Module irradiated at 462 cm from lower end

  6. VI: Module 3B90Sr scan before and after 2nd irradiation After irradiation: Before irradiation: Ratio: Irr/Non-irr: Source position: 462cm

  7. VI: Module 3B90Sr scan before and after 3rd irradiation L-side Module irradiated at 23 cm from lower end

  8. VI: Module 3B90Sr scan before and after 3rd irradiation: L-side After irradiation: Before irradiation: Ratio: Irr/Non-irr: Source position: 20cm

  9. VI: Module 3B 5th irradiation: upper side, around straw 32 60 hours Source profile (linear): Source profile (logar.):

  10. VI: Module 3B90Sr scan before and after 5th irradiation 60 hours Module irradiated at 430 cm from lower end

  11. VI: Module 3B90Sr scan before and after 5th irradiation: 60 hours After irradiation: Before irradiation: Ratio: Irr/Non-irr: Source position: 430cm

  12. VI: Module 3B90Sr scan before and after 6th irradiation • By accident gas flow: off… • Irradiated • 4 hours with HV • 8 hours without HV • Used 2 sources • Source collimated circular at 442 cm • Source collimated with slit at 475 cm(used for 90Sr scans) Point collimated Slit collimated

  13. VI: Module 3B90Sr scan before and after 6th irradiation: No gas flow! After 6th irradiation: ! Before 6th irradiation: Ratio: Irr/Non-irr: • Point collimated: 442 cm • effect is circular, as expected • Slit collimated: 475 cm • gain increased!? • No gas flow • Only 4 hrs at HV=1600V Source positions: 442cm and 475 cm

  14. VI: Module 3B 7th irradiation: upper side, around straw 32 20 l/hr Source profile (linear): Source profile (logar.):

  15. VI: Module 3B90Sr scan before and after 7th irradiation 20 l/hr Gas flow: 20 l/hr Source at 390 cm Irradiated 15 hours

  16. VI: Module 3B90Sr scan before and after 7th irradiation: 20 l/hr After 7th irradiation: Before 7th irradiation: Ratio: Irr/Non-irr: • Gas flow: 20 l/hr Source positions: 390cm

  17. VI: Module 3B 8th irradiation: upper side, around straw 32 2.5 l/hr Source profile (linear): Source profile (logar.):

  18. VI: Module 3B90Sr scan before and after 8th irradiation 2.5 l/hr Gas flow: 2.5 l/hr Source at 375 cm Irradiated 15 hours

  19. VI: Module 3B90Sr scan before and after 8th irradiation: 2.5 l/hr After 8th irradiation: Before 8th irradiation: Ratio: Irr/Non-irr: • Gas flow: 2.5 l/hr Source positions: 375 cm

  20. VI: Module 3B90Sr scan before and after 9th irradiation 2 sources Gas flow: 10 l/hr 2 sources  Does the 1st source eats the pollutions?? Irradiated 15 hours • Used 2 sources • Source collimated circular at 340 cm • Source collimated with slit at 360 cm(used for 90Sr scans)

  21. VI: Module 3B90Sr scan before and after 9th irradiation: 2 sources After 9th irradiation: Before 9th irradiation: Ratio: Irr/Non-irr: • Two sources: Source positions: 340 and 460 cm

  22. VI: Module 3B90Sr scan before and after 10th irradiation dryer?? Gas flow: 20 l/hr Source at 310 cm Irradiated 15 hours Humidity on output: Tdew= -43 oC  <200 ppm Wire locator

  23. VI: Module 3B90Sr scan before and after 10th irradiation: dryer?? After 8th irradiation: Before 8th irradiation: Ratio: Irr/Non-irr: • Gas flow: 20 l/hr • Humidity: <200 ppm Source positions: 310 cm

  24. VI: Module 3B11th irradiation: upper side, around straw 32 dry: 20-30 ppm Source profile (linear): Source profile (logar.):

  25. VI: Module 3B90Sr scan before and after 11th irradiation dry: 20-30 ppm Gas flow: 20 l/hr Source at 415 cm Irradiated 15 hours Humidity on output: Tdew= -51 oC  20-30 ppm

  26. VI: Module 3B90Sr scan before and after 11th irradiation: dry: 20-30 ppm After 8th irradiation: Before 8th irradiation: Ratio: Irr/Non-irr: • Gas flow: 20 l/hr • Humidity: 20-30 ppm Source positions: 415 cm

  27. Humidity 29 Jan 23 Jan

  28. Conclusions Gas flow L-wire 64 L U 485cm 1 Position

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