Who:Kimura and Yasui
Task:
We are started Q-mass measurement at IX and EX.
Please see attached photos.
Phots show only raw date including noise of caused by ionization in Q-mass.
It needs to analyze raw data to reject the noise.
When: 27/Jan./2022
Who: Kimura and Yasui
Task:
We measured partial pressure of IXC and EXC by manual mode of Q-mass analzer.
Results are as follows;
| IX | EX | |
| Tortal Pressure (Pa) | 3.1 x 10^-4 | 3.1 x 10^-4 |
| He (Pa) | 2.0 x 10^-10 | 7.7 x 10^-10 |
| H2O (Pa) | 7.5 x 10^-6 | 2.7 x 10^-4 |
| O2 (Pa) | 4.8 x 10^-8 | 1.7 x 10^-6 |
| N2 (Pa) | 2.1 x 10^-7 | 7.6 x 10^-6 |
| Ratio of O2/N2 (%) | 23 | 22 |
We confirmed main component of redisual gas in the cryostat was H2O.
We continue to measure and analyze redisual gas in the cryostat.
When: 3/Feb./2022
Who: Kimura and Yasui
Task:
We measured partial pressure of IXC and EXC with manual mode of Q-mass analyzer, again.
Results are as follows;
| IX | EX | |
| Tortal Pressure (Pa) | 3.1 x 10^-4 | 2.9 x 10^-4 |
| He (Pa) | 1.6 x 10^-10 | 8.8 x 10^-10 |
| H2O (Pa) | 6.5 x 10^-6 | 2.6 x 10^-4 |
| O2 (Pa) | 4.1 x 10^-8 | 1.7 x 10^-6 |
| N2 (Pa) | 2.2 x 10^-7 | 8.6 x 10^-6 |
| Ratio of O2/N2 (%) | 20 | 20 |
We confirmed main component of redisual gas in the cryostat was H2O.
We continue to measure and analyze redisual gas in the cryostat.