Goal: Beam Loss Monitors and Ring injection at high charge. Studies of the injector for high charge. Emittance measurements.

08h33 ThomX was started: modulator,frig, laser

08h40 Chilers were started, all magnets cycling

11h05 HV is 'ON'

11h15 RF Gun phase 194 dg. laser att. 280, Gun charge -100 pC.  Breakdowns in the RF gun

12h14 Breakdowns in the RF gun. Vacuum interlocks. Drop HV to 1210.

12h30 Restore HV

Increase of the charge from 100 pc to 450 pC. Tuning of the injector and ring injection. We suceeed to minilize the injection losses for the high chege. After our studies,  the charge in the ring incresed proportinally to the charge in the linac measured with the BPM.

The recettes were saved in the folder REFERENCES

50MeV_450pC_BLMRCDS_Ratio1_20250527_15_12_22 (best storage with min losses)

15h50 RF gun phase 190 dg., Sect. phase 206 dg., sect. Att. 2.61 dB, Laser Att. 420, Charges (BPMs): -451 pC, -451 pC, 437 pC, Sum(TBTSum = 5.4e11). Receipt: 50MeV_450pC_BLMRCDS_Ratio1_20250527_15_12_22

Emittanse mesurement with QP3 (Isol=235 A)

beta x = 5.0264 alpha x = -1.5425 Horizontal normalized emittance 11.6 mm*mrad

beta y = 7.8251 alpha y = -3.0341, Vertical normalized emittance 7.9 mm*mrad

16h35 RF gun phase 184 dg., Sect. phase 204 dg., sect. Att. 2.69 dB, Laser Att. 303, Charges (BPMs): -219 pC, -216 pC, 240 pC, Sum(TBTSum = 3e11). Receipt: 50MeV_450pC_BLMRCDS_Ratio1_20250527_15_12_22

Emittanse mesurement with QP3 (Isol=235 A)

beta x = 51.2017 alpha x = -15.6429, Horizontal normalized emittance 1.1 mm*mrad

beta y = 5.7487 alpha y = -2.2848, Vertical normalized emittance 4.5 mm*mrad