Energy measurements within the amplifier chain are recorded in a google sheet: S20 Laser Performance.
The expected energies throughout the system are given in the table below.
| Description | Energy (mJ) |
|---|---|
| Pre-amp seed | 3.7 |
| Pre-amp pump | 80.0 |
| Pre-amp out | 27.0 |
| SAGA 1 at crystal | 930 |
| SAGA 2 at crystal | 870 |
| Main amp out | 615 |
Energy Efficiencies to Various Locations
Drop in efficiency from 9/20/2023 to 1/11/2024 is largely due to the change in the RP attenuator efficiency. This may be a measurement error due to the order several-minute fluctuations in output energy of the laser. The measured energies from the main amplifier were 554.3mJ and 566.0mJ and in the tunnel were 2.669mJ and 2.784mJ. The efficiency laser to tunnel with the RP attenuator was 0.48% and 0.49%, respectively. There seems to be no loss in performance over time.
| Date | To Transport Shutters | To PB | Iris 40mm | RP Attenuation | Log Book |
|---|---|---|---|---|---|
| 9/1/2023 | 85% | http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2023/35/01.09&pos=2023-09-01T16:26:41 | |||
| 9/20/2023 | 86.3% | 37.5% | 34.7% | 1.39% | http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2023/38/20.09&pos=2023-09-20T23:05:19 |
| 1/11/2024 | 32.5% | 1.51% | http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2024/02/11.01&pos=2024-01-11T23:26:01 |