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Copenhagen, 2-3.09.02. Results of ageing tests C. Garabatos, GSI. Experimental set-up TEDLAR ARALDIT 2013. P. Anode signal. HV. I A. Chamber. O 2 T. Outgassing box. 55 Fe. Ageing tests set-up. Readout and monitoring of relevant parameters. Conditions of tests. Tedlar - PowerPoint PPT Presentation
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Results of ageing tests
C. Garabatos, GSI
•Experimental set-up
•TEDLAR
•ARALDIT 2013
Copenhagen, 2-3.09.02
Ageing tests set-up
PAnodesignal
HV IA
55Fe
O2
T
Chamber
Outgassingbox
Readout and monitoring of relevant parameters
Conditions of tests• Tedlar
– Foil of ~ 2x0.25 m2 in outgassing box
– Surface-to-flow ratio: 3 h/cm
– ALICE surface-to-flow: 5 h/cm
• ARALDIT 2013– Four glass slides painted on both sides
– Surface-to-flow ratio: 0.01 h/cm
____________________________________________
– No gas recirculation
– No heating of sample
Result of TEDLAR test
10
15
20
25
30
0 50 100 150 200 250 3000.6
0.8
1.0
1.2
1.4
Module 18TEDLAR test~0.13 mC/day
Time (Hours)
Co
rre
cte
d r
ela
tive
ga
in F
WH
M (%
)
10
12
14
16
18
20
22
24
C
urre
nt (
nA)
20000
22000
24000
26000
28000
30000
Rat
e (H
z)
0 200 400 600 800 1000
988
990
992
994
996
998
1000
1002
1004
1006
1008
1010
ARALDIT 2013
Pre
ssur
e (m
bar)
Time (hours)
0 200 400 600 800 1000
20
22
24
26
28
30
Ene
rgy
reso
lutio
n (%
)
Time (hours)
10
15
20
25
30
0 200 400 600 800 1000400
500
600
700
800ARALDIT 2013
Time (Hours)
Pe
ak
po
sitio
n (P
ress
ure
co
rre
cte
d) F
WH
M (%
)
Scan of chamber after tests
12
34
56
7
-2
0
2
4
6
8
10
12
14
16
18
20
22
24
0
2
4
6
8
10
Irradiated spots
Disconnected
Module 18
Cu
rre
nt (
nA
)
Y p
ositio
n
X position
Conclusions
• The set-up and the sensitivity of our gas mixture to 'everything' makes it difficult to perform controlled ageing tests,
• although any significant degradation would be detected
• No ageing effect can be attributed to the materials tested so far