9 Jan 2006 1
Irradiation Tests Module 3B
Many tests, see last slide for overview
Irradiate small area: 2x2 cm2, with 2 mCu 90Sr, 2 cm distance (~200 nA)
Source profile
NB: gas flow from Upper to Lower
Position1 485cm
L-wire 64
ULGas flow
9 Jan 2006 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 !
9 Jan 2006 3
VI: Module 3B 90Sr scan before and after 1st
irradiationModule irradiated at 486 cm from lower end
9 Jan 2006 4
VI: Module 3B 90Sr scan before and after 1st
irradiation
After irradiation:
Before irradiation:
Ratio: Irr/Non-irr:
Source position: 484cm
9 Jan 2006 5
VI: Module 3B 90Sr scan before and after 2nd
irradiationModule irradiated at 462 cm from lower end
9 Jan 2006 6
VI: Module 3B 90Sr scan before and after 2nd
irradiation
After irradiation:
Before irradiation:
Ratio: Irr/Non-irr:
Source position: 462cm
9 Jan 2006 7
VI: Module 3B 90Sr scan before and after 3rd irradiation L-
sideModule irradiated at 23 cm from lower end
9 Jan 2006 8
VI: Module 3B 90Sr scan before and after 3rd irradiation:
L-side
After irradiation:
Before irradiation:
Ratio: Irr/Non-irr:
Source position: 20cm
9 Jan 2006 9
VI: Module 3B 5th irradiation: upper side, around straw 32 60
hoursSource profile (linear): Source profile (logar.):
9 Jan 2006 10
VI: Module 3B 90Sr scan before and after 5th irradiation 60
hoursModule irradiated at 430 cm from lower end
9 Jan 2006 11
VI: Module 3B 90Sr scan before and after 5th irradiation: 60
hours
After irradiation:
Before irradiation:
Ratio: Irr/Non-irr:
Source position: 430cm
9 Jan 2006 12
VI: Module 3B 90Sr scan before and after 6th
irradiationBy accident gas flow: off…Irradiated 4 hours with HV8 hours without HV
Used 2 sourcesSource collimated circular at 442 cmSource collimated with slit at 475 cm (used for 90Sr scans)
Point collimated Slit collimated
9 Jan 2006 13
VI: Module 3B 90Sr scan before and after 6th irradiation: No gas
flow!
After 6th irradiation:
Before 6th 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 flowOnly 4 hrs at HV=1600V
!
9 Jan 2006 14
VI: Module 3B 7th irradiation: upper side, around straw 32
20 l/hrSource profile (linear): Source profile (logar.):
9 Jan 2006 15
VI: Module 3B 90Sr scan before and after 7th irradiation 20
l/hrGas flow: 20 l/hrSource at 390 cmIrradiated 15 hours
9 Jan 2006 16
VI: Module 3B 90Sr scan before and after 7th irradiation: 20 l/hr
After 7th irradiation:
Before 7th irradiation:
Ratio: Irr/Non-irr:
Source positions: 390cm
Gas flow: 20 l/hr
9 Jan 2006 17
VI: Module 3B 8th irradiation: upper side, around straw 32 2.5
l/hrSource profile (linear): Source profile (logar.):
9 Jan 2006 18
VI: Module 3B 90Sr scan before and after 8th irradiation 2.5
l/hrGas flow: 2.5 l/hrSource at 375 cmIrradiated 15 hours
9 Jan 2006 19
VI: Module 3B 90Sr scan before and after 8th irradiation: 2.5 l/hr
After 8th irradiation:
Before 8th irradiation:
Ratio: Irr/Non-irr:
Source positions: 375 cm
Gas flow: 2.5 l/hr
9 Jan 2006 20
VI: Module 3B 90Sr scan before and after 9th irradiation 2 sourcesGas flow: 10 l/hr2 sources Does the 1st source eats the pollutions??Irradiated 15 hours
Used 2 sourcesSource collimated circular at 340 cmSource collimated with slit at 360 cm (used for 90Sr scans)
9 Jan 2006 21
VI: Module 3B 90Sr scan before and after 9th irradiation: 2
sources
After 9th irradiation:
Before 9th irradiation:
Ratio: Irr/Non-irr:
Source positions: 340 and 460 cm
Two sources:
9 Jan 2006 22
VI: Module 3B 90Sr scan before and after 10th irradiation
dryer??Gas flow: 20 l/hrSource at 310 cmIrradiated 15 hours
Wire locator
Humidity on output: Tdew= -43 oC <200 ppm
9 Jan 2006 23
VI: Module 3B 90Sr scan before and after 10th irradiation:
dryer??
After 8th irradiation:
Before 8th irradiation:
Ratio: Irr/Non-irr:
Source positions: 310 cm
Gas flow: 20 l/hrHumidity: <200 ppm
9 Jan 2006 24
VI: Module 3B 11th irradiation: upper side, around straw 32 dry: 20-30
ppmSource profile (linear): Source profile (logar.):
9 Jan 2006 25
VI: Module 3B 90Sr scan before and after 11th irradiation dry: 20-
30 ppmGas flow: 20 l/hrSource at 415 cmIrradiated 15 hours
Humidity on output: Tdew= -51 oC 20-30 ppm
9 Jan 2006 26
VI: Module 3B 90Sr scan before and after 11th irradiation: dry: 20-30 ppm
After 8th irradiation:
Before 8th irradiation:
Ratio: Irr/Non-irr:
Source positions: 415 cm
Gas flow: 20 l/hrHumidity: 20-30 ppm
9 Jan 2006 27
Humidity
23 Jan
29 Jan
9 Jan 2006 28
ConclusionsTest
Date
Source 90Sr L-Wire w. max current
Position(cm)
Gas flow(l/hr)
Irradiation Time (hr)
Humidity(ppm)
Max gain drop
1 6 Jan 2mCu, <100nA/strawCollimator: point
58 484 10 12 - -20%
2 10 Jan
2mCu, <100nA/strawCollimator: point
58 462 10 8 - -10%
3 11 Jan
2mCu, <100nA/strawCollimator: point
54 20 10 12 - -50%
4 12 Jan
2mCu, <100nA/strawCollimator: point
58 430 10 15 - -20%
5 13 Jan
2mCu, <100nA/strawCollimator: point
32 430 10 60 - -80%
6 17 Jan
2mCu, <100nA/strawCollimator: point
32 440 0 4 - -10%
20mCu, <100nA/strawCollimator: slit
32 475 0 4 - -5% +2.5%
7 18 jan
2mCu, <100nA/strawCollimator: point
32 390 20 15 ~1000 -50%
8 19 Jan
2mCu, <100nA/strawCollimator: point
32 375 2.5 15 - -10%
9 20 Jan
2mCu, <100nA/strawCollimator: point
32 340 10 14 - -5-10% (downstream)
20mCu, <100nA/strawCollimator: slit
32 360 10 14 - -20% (upstream)
10 24 jan
2mCu, <100nA/strawCollimator: point
32 310 20 15 <200 -50%
11 28 jan
2mCu, <100nA/strawCollimator: point
32 415 20 15 20-30 -50%
Position1 485cm
L-wire 64
ULGas flow