View of the PSI experimental hall with the secondary beam lines for pions and muons.
PSI provides beam time for particle physics and other experiments. Its unique specialty is very high intensity pion and muon beams of momenta up to a few hundred MeV/c as well as ultracold neutrons. The secondary beam lines are maintained jointly by the Laboratory for Particle Physics, the Division of Large Research Facilities and the Spallation Source Operation Group.
Overview of Secondary Beam Lines
Following Secondary Beam Lines are available for nuclear and particle physics experiments.
Pions, Muons
| Area | Target | Momentum | Momentum Resolution % FHWM | Particle Type | max. π flux 1/s |
|---|---|---|---|---|---|
| πE1 | E | 10-500 MeV/c | 0.26 | Pions, Muons | 1 x 1010 |
| πE5 | E | 20-120 MeV/c | 2 | Pions, Muons | 2 x 1010 |
| πM1 | M | 100-500 MeV/c | 0.1 | Pions, Protons | 4 x 108 |
Ultracold Neutrons
| Area | Energy | Particle Type | Number of UCN |
|---|---|---|---|
| West-1 | > 50 neV | Neutrons | ~50 x 106 / 300 s |
| West-2 | > 100 neV | Neutrons | ~4 x 106 / 300 s |
| South | > 50 neV | Neutrons | ~50 x 106 / 300 s |