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