Table 1.
Calibration factors and Level-1 trigger thresholds for the readout channels of CHAOS. The calibration factors for Scintillator Stage D are given for a BGO temperature of 0°C. The calibration factors are denoted as HG for high gain, LG for low gain, and SG for single gain. Note that the given Level-1 trigger threshold for Channel B was used for the data acquisition of the readout electronics, not the data evaluation described in Section 4. If applicable, the Level-1 trigger thresholds are given as high gain/low gain.
| Channel | Detector | HG | LG | SG | Level-1 trigger |
|---|---|---|---|---|---|
| name | stage | in keV mV−1 | in keV mV−1 | in keV mV−1 | threshold in mV |
| A1 | SSD Stage A | 4.55 | 64.52 | – | 10/10 |
| A2 | SSD Stage A | 4.55 | 64.84 | – | 15/10 |
| B | Cherenkov Stage B | – | – | – | 50 |
| C1 | SSD Stage C | 4.55 | 64.25 | – | 10/10 |
| C2 | SSD Stage C | 4.55 | 64.97 | – | 15/10 |
| D1 | Scintillator Stage D | 88.06 | 1239.06 | – | 20/20 |
| D2 | Scintillator Stage D | 88.06 | 1239.06 | – | 20/20 |
| E0 | SSD Stage E | 4.55 | 64.52 | – | 10/10 |
| E1 | SSD Stage E | – | – | 11.32 | 8 |
| E2 | SSD Stage E | – | – | 11.32 | 8 |
| E3 | SSD Stage E | – | – | 11.32 | 8 |
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