Anders and I finished the most part of TM2 water lines helium pressure test yesterday.I list the system parameters and test result as below:
TCS IG1: 9.8XE-8 torr, TCS IG2: 9.6Xe-7 torr, TCS IG1S: 3.5XE-9 torr, TCS CG1A: 10 m torr
Helium pressure: 70 psi. Test time: 5 minutes for each individual circuit. 1 hour for all lines together test.
Leak detector base leak rate:0.0 X E -9 atm.cc/sec, base pressure 0.0X E-4 torr. LD was always restored or closely restored to the bottom scale after each individual test.
| Circuit |
Result (atm.cc/sec) |
| EE |
0.0X E-9 |
| Target Oven + |
0.0X E-9 |
| Coil 1 P-Q |
0.0X E-9 |
| Target Oven - |
1.0X E-9 |
| Tube Heater- |
4.1X E-9 |
| Tube heater+ |
1.6X E-8 |
| Coil 2 R-U |
6.6X E-9 |
| MSP |
1.4X E-7 |
| All above together (1 hour) |
2.3X E-7 |
| HS |
Open circuit . No test |
| Window |
Open circuit. No test. |
| GE |
7.2X E-7 |
The HS and Window lines will be tested later with new target installed and window line gaskets restored. |