Status of the RFQ linac installation and conditioning of the Linear IFMIF Prototype Accelerator

Abstract The Radio Frequency Quadrupole (RFQ) linac and 1.6 MW RF power system of the Linear IFMIF Prototype Accelerator (LIPAc) facility in the International Fusion Energy Research Center (IFERC) in Rokkasho (Japan) has been installed and conditioned. During the assembly and tuning process, the RFQ cavity was protected with a temporary tent from the potential deterioration of performance caused by dust. The vacuum in the cavity was improved through the 100 °C baking process of the cavity. The high power test of the 175 MHz RF systems up to 200 kW in CW for each of the eight RF chains was performed for checking its stable output reproducibility in Japan, before connecting 9–3/16 inch coaxial transmission lines from the RF chains to the RF input couplers of the cavity. It was confirmed that the eight RF chains provided the balanced RF power to the single RFQ cavity in-phase using a feedback loop and a synchronization system. The peak power in the cavity achieved 150 kW in the pulsed mode, which corresponds approximately to the required electric field to accelerate proton beam. Such RF conditioning process is ongoing to achieve 600 kW approximately required for deuteron beam commissioning planned in 2018

Status of RFQ Linac installation and commissioning in Rokkasho for the Linear IFMIF Prototype Accelerator

IFMIFの実現へ向けて、工学実証及び工学設計活動（EVEDA）が日欧間のBA協定の下で実施されている。この活動の一環として、原型加速器(LIPAc)の建設が六ヶ所で進行中である。LIPAｃを構成する高周波四重極線形加速器(RFQ)は、175 MHzの高周波(最大1.3 MW)を用いて、125 mAの重水素ビームを0.1 MeVから5 MeVまで定常的に加速する革新的な設計となっている。本発表では、RFQのビーム軸を高精度にアライメントするためのレーザートラッカーを用いた測定、ビーズ引き出し試験によるRFQ空洞の調整等、RFQの据付けが完了するまでの工程について詳細に述べる。The 18th International Conference on Fusion Reactor Material

Beam Induced Fluorescence Measurements of 100 keV Deuterons in LIPAc Accelerator

International audienceThe LIPAc accelerator will be a linear CW deuteron accelerator capable of delivering a 9 MeV, 125 mA beam which aims to validate the technology that will be used in the future high power accelerator-driven neutron source, IFMIF. In summer 2017 a campaign of measurements was done during the injector commissioning, in which a Fluorescence Profile Monitor based on an Intensified CID camera (ICID) was used to measure the beam transverse profile at the extraction of the ion source. In this contribution we review the design of the ICID, its performance and discuss the measurements carried out. The performance of ICID monitors for its use in future accelerators will be assessed

Source and LEBT Beam Preparation for IFMIF-EVEDA RFQ

International audienceThe commissioning phase of the IFMIF-EVEDA RFQ requires a complete beam characterization with simula-tions and measurements of the beam input from the IFMIF-EVEDA ion source and LEBT, in order to reach the RFQ input beam parameters. In this article, the simula-tions results of the complex source-LEBT with the corre-sponding set of measurements and their impact on the commissioning plan will be reported