As Nakano-san suggested during the previous morning meeting, having a list that includes measured substrate and violin Q-values is highly valuable for obtaining a comprehensive understanding of the current situation.
The substrate Q-value primarily focuses on the fundamental drumhead mode (~24 kHz), while the other higher resonance modes tend to exhibit higher Q-values.
The violin Q-value is that of the first violin mode (~180 Hz).
This list should be regularly updated by future measurements.
Substrate Q-value:
| 250 K | 80-90 K | 20-30 K | |
| EX | - | 1e5 (klog:23677) | - |
| EY | 3e4 (klog:25916) | 2e5 (klog:26890) | - |
| IX | 4e4 (klog:23870) | 1e6 (klog:26900) | - |
| IY | 2e4 (klog:24266) | 2e6 (klog:26679) | - |
| Design | - | - | 1e8 |
Violin Q-value:
| 250 K | 80-90 K | 20-30 K | |
| EX | - | 1e4-1e5 (klog:26113) | - |
| EY | 2e4 (klog:26113) | - | - |
| IX | 2e4 (klog:26113) | - | - |
| IY | 1e4 (klog:26113) | - | - |
| Design | 2e4 | 2e6 | 5e6 |