Table 1.
Equipment modules used in the KATRIN LARA setup, and their specifications.
| Device | Model | Manufacturer | Specifications |
|---|---|---|---|
| Laser | Finesse | Laser Quantum, UK |
Nd:YVO4 2nd harmonic (TEM00); λL = 532 nm; PL = 5 W (CW) |
| Raman filter | RazorEdge LP03-532RU | Semrock, USA |
T > 0.97 for λRaman > 537.nm; T < 10−6 for λL = 532 nm |
| Fiber bundle | Custom “slit-to-slit” |
CeramOptec, Germany |
48 individual fibers, core = 100 μm; Bundle height = 6 mm |
| Spectrometer | HTS | PI Acton, USA |
f = 85 mm, with f/# = 1.8; λrange = 500–750 nm (fixed); Δλ ≈ 1 nm (for slit = 100 μm) |
| CCD array detector | Pixis 2KB | Princeton Instruments, USA |
Back illuminated; 2048 × 512 pixel (27.6 × 6.9 mm); TCCD-chip ≤ −70 °C; Dark noise ≈ 10−3 e−·s−1·pixel−1 |
| Acquisition software | LARAsoft | TLK in-house | Device control; Data acquisition; Spectrum analysis (written in LabVIEW) |