Commissioning of high current H+/D+ ion beams for the prototype accelerator of the International Fusion Materials Irradiation Facility

Abstract

The Linear IFMIF (International Fusion Materials Irradiation Facility) Prototype Accelerator (LIPAc) is aiming at demonstrating the low energy section of a 40 MeV/125 mA IFMIF deuteron accelerator up to 9 MeV with a full beam current in cw operation. For such a high-power beam, the LIPAc injector is required to produce a 100 keV D+ beam with 140 mA and match it for injection into the Radio Frequency Quadrupole (RFQ) accelerator. The injector is designed by CEA-Saclay based on the high intensity light ion source (SILHI). In 2019, the commissioning of the RFQ to demonstrate the D+ beam acceleration at a low duty cycle (0.1%) was conducted. A nominal beam current of 125 mA D+ beam was accelerated up to 5 MeV through the RFQ successfully. The LIPAc injector fully satisfied the requirements for RFQ beam commissioning at the pulse mode.

Achievement of high-current continuous-wave deuteron injector for linear IFMIF prototype accelerator (LIPAc)

“…In 2019, the RFQ successfully accelerated a 125 mA deuteron pulsed beam at low duty cycle (pulse width of 1 ms, 1 Hz) [2]. In this phase, the LIPAc injector fully satisfied the requirements at low duty cycle operation, achieving a total extracted current of 160 mA being matched into the RFQ with good RFQ transmission (>90%) [3]. Since then, construction of the LIPAc has progressed and beam commissioning in the current Phase B+ has started in 2021 [4].…”

Extraction and low energy beam transport models used for the IFMIF/EVEDA RFQ commissioning

“…During the commissioning of the Linear IFMIF Prototype Accelerator (LIPAc) [1], an intense study campaign focused on the injector, composed by the ECR ion source and the LEBT line [2] has been perfomed, in order to characterize the beam at the RFQ input and to reach its nominal transmission (achieved in 2019 [3]). The experiments related to the injector are described in [4,5]. The ECR (Electron Cyclotron Resonance) consists of a 2.45 GHz RF power source with two coils magnetic structure.…”