[Ikeda, Washimi, Takahashi]
We replaced the P2 feedthrough flange.
- Checked the resistance between all pins in each Dsub connecter on the present flange (leaked previously) without the flip cables.
- Removed the present flange.
- Tagged a number and name to all Dsub connectors on the new flange.
- Connected the in-vacuum cables to the Dsub connectors.
- Closed the flange with two screws temporally.
- Checked the resistance between all pins in each Dsub connecter on the new flange without the flip cables.
| Old | New | Inductance | |
| 1:PI LV1 1-6 2-7 3-8 4-9 5-G |
317Ω 248Ω 146Ω OL 5.3Ω |
317Ω 248Ω 146Ω OL OL | 35.38mH 52.41mH 61.53mH
|
| 2:SF LV 1-6 2-7 3-8 4-9 5,6-G |
198Ω 78.6Ω 111Ω OL 3,6Ω |
198Ω 78.7Ω 111Ω OL 0,0.4Ω | 39.21mH 10.12mH 68.95mH
|
| 3:TM H2 1-6 2-7 3-8 4-9 5-G |
OL 18.5Ω OL OL 1.4Ω |
OL 18.6Ω OL OL OL |
8.631mH
|
| 4:F0 LV 1-6 2-7 3-8 4-9 5-G |
196Ω 77.3Ω 114Ω OL 1.7Ω |
196Ω 77.1Ω 114Ω OL 0.5Ω | 42.59mH 10.56mH 73.79mH
|
| 5:PI FR 1-6 2-7 3-8 4-9 |
5.0Ω 4.7Ω 3.2Ω 3.3Ω |
4.8Ω 4.8Ω 3.2Ω 3.3Ω |
|
| 6:IM H1 1-6 2-7 3-8 4-9 5-G |
5.8MΩ 17.8Ω OL OL 2.3Ω |
5.8MΩ 17.7Ω OL OL 4.3Ω | 0.531V(6+) 8.357mH 1.70V(3+)
|
| 7:TM H3 1-6 2-7 3-8 4-9 5-G |
OL 18.5Ω OL OL 10.6Ω |
OL 18.5Ω OL OL OL |
8.662mH
|
| 8:PI SM 1-6 2-7 3-8 4-9 |
6.3Ω 6.9Ω 6.1Ω 5.1Ω |
6.6Ω 6.8Ω 6.1Ω 5.2Ω |
|
The Pin-6 in P2-2(SF LV) was grounded. There were not any other cross-connections. Though the Pin-5 in P2-1, P2-3, and P2-7 were grounded, they were floated after the flange replacement. It may be due to the condition of the aluminum foil covering the Dsub connectors.
