38 Acoustic Emission Testing for the Large Vacuum System …
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Table 38.2
The situation of acoustic emission activity sources (V-06)
ID Pressure stage
Region No. Position A(dB) D (µs)
E (eu)
R (µs) Remarks Activity Strength Comprehensive evaluation
1
Pumping to 50,000 Pa
I
2/1/9
80.2
38,003.2 136E04 565.2
×2
Medium High
III
2
I
1/6/9
73.8
34,636.8 478E03 709.8
Medium Medium II
3
II
3/14/10 87.4
79,436.8 232E05 954.4
Medium High
III
4
II
6/9/5
60.7
14,067.2 216E02 859.6
×2
Medium Medium II
5
II
6/3/9
62.6
22,963.2 837E02 844.8
Medium Medium II
1
50,000 Pa in the pressure
maintaining stage
I
2/1/6
78.0
35,750.4 547E03 562.2
Strong
Medium III
2
II
6/9/5
64.4
21,184.0 743E02 878.0
Strong
Medium III
1
50,000 – 10,000 Pa
I
2/1/9
78.7
37,491.2 689E03 570.8
Medium Medium II
2
I
1/6/5
70.5
30,131.2 590E03 726.2
Medium Medium II
3
I
1/3/9
72.7
33,830.4 292E03 428.8
Medium Medium II
4
II
5/6/3
73.1
36,979.2 715E03 861.6
Medium Medium II
5
II
3/9/6
78.4
52,838.4 202E04 712.0
Medium Medium II
6
II
3/10/14 75.7
41,548.8 683E03 988.4
Medium Medium II
7
II
9/6/5
78.0
46,169.6 188E04 1168.0
×5
Medium Medium II
1
10,000–5000 Pa
I
9/6/2
84.4
32,204.8 212E04 279.8
Medium High
III
2
II
5/6/9
71.2
29,248.0 325E03 846.0
Medium Medium II
1
5000 Pa in the pressure
maintaining stage
II
3/10/14 79.1
28,416.0 102E04 791.0
Strong
Medium III
1
5000 –23.7 Pa
I
2/1/6
83.6
32,204.8 212E04 1231.6
Medium high
III
2
I
3/9/1
76.1
20,102.4 386E03 512.0
Medium Medium II
3
II
10/4/3
81.7
18,636.8 463E03 195.8
Medium high
III
4
II
3/14/10 77.2
24,467.2 566E03 490.6
×5
Medium Medium II