Table 1 Experimental parameters for the three runs
From: Precision spectroscopy of the hyperfine components of the 1S–2S transition in antihydrogen
Run | Average 121.6 nm pulse energy (nJ) | Accumulation time (h) | Atoms | 243 nm exposure duration (s) | Minimum 243 nm shuttered time (s) | 243 nm frequency spread | Double sweeps (d–d) | Double sweeps (c–c) |
|---|---|---|---|---|---|---|---|---|
1 | N/A | 11.5 | 1,673 ± 49 | 2 | 0.4 | Wide | 50 | 50 |
2 | 1.86 | 10.1 | 916 ± 37 | 2 | 0.4 | Wide | 50 | 50 |
3 | 1.89 | 9.1 | 512 ± 28 | 1 | 1.4 | Narrow | 100 | 0 |
Nominal frequency detunings: ‘wide’ (runs 1 and 2) (kHz) | ||||||||
–200 | –100 | –50 | –25 | 0 | 25 | 50 | 100 | 200 |
Nominal frequency detunings: ‘narrow’ (run 3) (kHz) | ||||||||
–100 | –25 | –12.5 | 0 | 12.5 | 25 | 37.5 | 50 | 100 |
