IPAC'23 - 14th International Particle Accelerator Conference

Strategies for SPIRAL2 linac heavy-ion beam tuning

TUPA192

9 May 2023, 16:30

2h

Salone Adriatico

Poster Presentation MC4.A08: Linear Accelerators Tuesday Poster Session

Speaker

Guillaume Normand (Grand Accélérateur Nat. d'Ions Lourds)

Description

Heavy ions have been accelerated for the first time by SPIRAL2 in 2022. A fast method to tune the linac cavities has been used (< 1 hour by now, < 10’ in the future) to obtain a 7 MeV/A 18O6+ beam (50 microA CW). Then an automatic Q/M beam change procedure has been successfully used to directly produce a 18O7+ beam. The goal was to demonstrate the possibility to tune a beam even if its intensity is too low (<10 microA) to be seen by phasemeters (BPM) along the linac. The linac transmission was ~ 100% for both beams and, as expected, the measured output energy was the same. The same oxygen reference beam tuning has been also used to obtain 80 microA of 40Ar14+ at 7 MeV/A. Again, the same method has been used to tune the linac cavities at the RFQ output energy beam (0.73 MeV/A, no acceleration). These different methods and the one used to tune the linac output energy are presented.