1. 9 Jan 2006 1 Irradiation Tests Module 3B Many tests, see last slide for overview Irradiate small area: 2x2 cm 2, with 2 mCu 90 Sr, 2 cm distance (~200 nA) Source profile NB: gas flow from Upper to Lower Position 1 485cm L-wire 64 UL Gas flow

2. 9 Jan 2006 2 History Module 3 Construction:  12 May 2004 Flushed with Ar/CO 2, 10 l/hr:  9 June 2006 – 29 June 2004 (Humidity of gas on input : T dew =-76 0 C, 17 June 2004) 18 June 2004: T dew =-22 0 C 22 June 2004: T dew =-33 0 C 29 June 2004: T dew =-35 0 C  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/CO 2, 10 l/hr (2.5 – 20):  6 Jan 2006 – present Date Time Tmitchell Tcorrected H 2 0 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. 9 Jan 2006 3 VI: Module 3B 90 Sr scan before and after 1 st irradiation Module irradiated at 486 cm from lower end

4. 9 Jan 2006 4 VI: Module 3B 90 Sr scan before and after 1 st irradiation After irradiation: Before irradiation: Ratio: Irr/Non-irr: Source position: 484cm

5. 9 Jan 2006 5 VI: Module 3B 90 Sr scan before and after 2 nd irradiation Module irradiated at 462 cm from lower end

6. 9 Jan 2006 6 VI: Module 3B 90 Sr scan before and after 2 nd irradiation After irradiation: Before irradiation: Ratio: Irr/Non-irr: Source position: 462cm

7. 9 Jan 2006 7 VI: Module 3B 90 Sr scan before and after 3 rd irradiation L-side Module irradiated at 23 cm from lower end

8. 9 Jan 2006 8 VI: Module 3B 90 Sr scan before and after 3 rd irradiation: L-side After irradiation: Before irradiation: Ratio: Irr/Non-irr: Source position: 20cm

9. 9 Jan 2006 9 VI: Module 3B 5 th irradiation: upper side, around straw 32 60 hours Source profile (linear):Source profile (logar.):

10. 9 Jan 2006 10 VI: Module 3B 90 Sr scan before and after 5 th irradiation 60 hours Module irradiated at 430 cm from lower end

11. 9 Jan 2006 11 VI: Module 3B 90 Sr scan before and after 5 th irradiation: 60 hours After irradiation: Before irradiation: Ratio: Irr/Non-irr: Source position: 430cm

12. 9 Jan 2006 12 VI: Module 3B 90 Sr scan before and after 6 th 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 90 Sr scans) Point collimatedSlit collimated

13. 9 Jan 2006 13 VI: Module 3B 90 Sr scan before and after 6 th irradiation: No gas flow! After 6 th irradiation: Before 6 th irradiation: Ratio: Irr/Non-irr: Source positions: 442cm and 475 cm  Point collimated: 442 cm effect is circular, as expected  Slit collimated: 475 cm gain increased!?  No gas flow  Only 4 hrs at HV=1600V !

14. 9 Jan 2006 14 VI: Module 3B 7 th irradiation: upper side, around straw 32 20 l/hr Source profile (linear):Source profile (logar.):

15. 9 Jan 2006 15 VI: Module 3B 90 Sr scan before and after 7 th irradiation 20 l/hr Gas flow: 20 l/hr Source at 390 cm Irradiated 15 hours

16. 9 Jan 2006 16 VI: Module 3B 90 Sr scan before and after 7 th irradiation: 20 l/hr After 7 th irradiation: Before 7 th irradiation: Ratio: Irr/Non-irr: Source positions: 390cm  Gas flow: 20 l/hr

17. 9 Jan 2006 17 VI: Module 3B 8 th irradiation: upper side, around straw 32 2.5 l/hr Source profile (linear):Source profile (logar.):

18. 9 Jan 2006 18 VI: Module 3B 90 Sr scan before and after 8 th irradiation 2.5 l/hr Gas flow: 2.5 l/hr Source at 375 cm Irradiated 15 hours

19. 9 Jan 2006 19 VI: Module 3B 90 Sr scan before and after 8 th irradiation: 2.5 l/hr After 8 th irradiation: Before 8 th irradiation: Ratio: Irr/Non-irr: Source positions: 375 cm  Gas flow: 2.5 l/hr

20. 9 Jan 2006 20 VI: Module 3B 90 Sr scan before and after 9 th irradiation 2 sources Gas flow: 10 l/hr 2 sources  Does the 1 st 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 90 Sr scans)

21. 9 Jan 2006 21 VI: Module 3B 90 Sr scan before and after 9 th irradiation: 2 sources After 9 th irradiation: Before 9 th irradiation: Ratio: Irr/Non-irr: Source positions: 340 and 460 cm  Two sources:

22. 9 Jan 2006 22 VI: Module 3B 90 Sr scan before and after 10 th irradiation dryer?? Gas flow: 20 l/hr Source at 310 cm Irradiated 15 hours Wire locator Humidity on output: T dew = -43 o C  <200 ppm

23. 9 Jan 2006 23 VI: Module 3B 90 Sr scan before and after 10 th irradiation: dryer?? After 8 th irradiation: Before 8 th irradiation: Ratio: Irr/Non-irr: Source positions: 310 cm  Gas flow: 20 l/hr  Humidity: <200 ppm

24. 9 Jan 2006 24 VI: Module 3B 11 th irradiation: upper side, around straw 32 dry: 20-30 ppm Source profile (linear):Source profile (logar.):

25. 9 Jan 2006 25 VI: Module 3B 90 Sr scan before and after 11 th irradiation dry: 20-30 ppm Gas flow: 20 l/hr Source at 415 cm Irradiated 15 hours Humidity on output: T dew = -51 o C  20-30 ppm

26. 9 Jan 2006 26 VI: Module 3B 90 Sr scan before and after 11 th irradiation: dry: 20-30 ppm After 8 th irradiation: Before 8 th irradiation: Ratio: Irr/Non-irr: Source positions: 415 cm  Gas flow: 20 l/hr  Humidity: 20-30 ppm

27. 9 Jan 2006 27 Humidity 23 Jan 29 Jan

28. 9 Jan 2006 28 Conclusions TestDate Source 90 SrL-Wire w. max current Position (cm) Gas flow (l/hr) Irradiation Time (hr) Humidity (ppm) Max gain drop 16 Jan2mCu, <100nA/straw Collimator: point 584841012--20% 210 Jan2mCu, <100nA/straw Collimator: point 58462108--10% 311 Jan2mCu, <100nA/straw Collimator: point 54201012--50% 412 Jan2mCu, <100nA/straw Collimator: point 584301015--20% 513 Jan2mCu, <100nA/straw Collimator: point 324301060--80% 617 Jan2mCu, <100nA/straw Collimator: point 3244004--10% 20mCu, <100nA/straw Collimator: slit 3247504--5% +2.5% 718 jan2mCu, <100nA/straw Collimator: point 323902015~1000-50% 819 Jan2mCu, <100nA/straw Collimator: point 323752.515--10% 920 Jan2mCu, <100nA/straw Collimator: point 323401014--5-10% (downstream) 20mCu, <100nA/straw Collimator: slit 323601014--20% (upstream) 1024 jan2mCu, <100nA/straw Collimator: point 323102015<200-50% 1128 jan2mCu, <100nA/straw Collimator: point 32415201520-30-50% Position 1 485cm L-wire 64 UL Gas flow