Title of the slide

Operation and commissioning of IFMIF LIPAc Injector

and J-M AyalaA), B. BolzonB), P. CaraC), N. ChauvinB), D. ChelB), D. GexC), R. GobinB), F. HarraultB), R. HeidingerC), R. IchimiyaD), A. IharaD), Y. IkedaD), A. KasugaiD), T. KikuchiD), T. KitanoD), J. KnasterA), M. KomataD),, K. KondoD), S. MaebaraD), A.

MarquetaA), S. OhiraD), M. PerezA), G. PhillipsC) , G. PruneriA), K. SakamotoD), F. ScantamburloA), F. SeneeB), K. ShintoD), M. SugimotoD), H. TakahashiD), H. UsamiD),

M. ValetteB)

A) IFMIF/EVEDA Project Team, Rokkasho, Aomori, JapanB) Commissariat à l’Energie Atomique et aux Energies Alternatives, CEA/Saclay,

FranceC) F4E, Fusion for Energy, BFD Department, Garching, GermanyD) JAEA, Rokkasho Fusion Research Institute, Rokkasho, Aomori, Japan

Yoshikazu OKUMURA IFMIF/EVEDA Project Team

Operation and commissioning of IFMIF LIPAc Injector 2

What is IFMIF ?

26 August, 201616-17/12/2014 Current Status of IFMIF, FPA 35th Annual Meeting and Symposium 2

IFMIF（ International Fusion Materials Irradiation Facility) is an accelerator based neutron source using Li(d,n) reactions aiming at providing a material irradiation database for the

design, construction, licensing, and safe operation of DEMO.

Operation and commissioning of IFMIF LIPAc Injector 3

IFMIF/EVEDA Project under BA Activities

26 August, 2016

Since 2007, IFMIF/EVEDA (Engineering Validation and Engineering Design Activities) under the Broader Approach Agreement between EU and Japan

Validation Activities: 1. Accelerator Facility

2.Target facility

3. Test Facility

7 countries involvedwith the respective main research labs in Europe and main labs and universities in Japan

Operation and commissioning of IFMIF LIPAc Injector 4

IFMIF Concept

26 August, 2016

LMH

Test Cell

High (>20 dpa/y, 0.5 L)Medium (>1 dpa/y, 6 L)Low (<1 dpa/y, > 8 L)

Accelerator(125 mA x 2)

100 keV 5 MeV 9 14.5 26 40 MeV

HEBTInjector

140 mA D+

LEBTRFQ

MEBT

RF Power System

Half Wave ResonatorSuperconducting Linac

Beam shape:200 x 50 mm2

Lithium Target25±1 mm thick, 15 m/s

Engineering Validation IFMIF/EVEDA in BA

Engineering Validation IFMIF/EVEDA in BA

IFMIF consists of two deuteron linear accelerators, free surface liquid lithium target, test cell, and the post irradiation examination facility.

Operation and commissioning of IFMIF LIPAc Injector 5

IFMIF/EVEDA Project in Rokkasho

26 August, 2016

★ Rokkasho

IFMIF/EVEDA Accelerator Building (for LIPAc)

CafeteriaDEMO R&D Building

Administration & Research Building

Computer Simulation & Remote Experimentaion Building

A new research center was established in Rokkasho for Broader Approach activities in 2007.

Operation and commissioning of IFMIF LIPAc Injector 6

Linear IFMIF Prototype Accelerator (LIPAc)

26 August, 2016

6

Injector（ 100keV）

Radio Frequency Quadropole（ RFQ)(0.1MeV-5MeV) Super-Conduction Linac (5MeV-9MeV)

Building, Auxiliary System, Control

Beam Dump(1.1MW/CW)

RF Power Supply

Operation and commissioning of IFMIF LIPAc Injector 7

LIPAc installation in Rokkasho

26 August, 2016

Injector was installed in Rokkasho and commissioning started in 2014.

Operation and commissioning of IFMIF LIPAc Injector 8

ECR Ion Source and Requirements

26 August, 2016

Requirements Target valueParticles D+

Output energy 100 keVOutput D+ current 140 mA

D+ fraction 99 %Beam current noise 1 % rms

Normalized rms transverse emittance

0.25 π.mm.mrad

Duty factor CWBeam turn-off time < 10 µs

Requirements at the entrance of RFQ (Radio-Frequency Quadrupole) Accelerator

Operation and commissioning of IFMIF LIPAc Injector 9

Injector and Diagnostics

26 August, 2016

Emittance Scaner Spectroscopy

CID Profile Monitor

ECR Ion SourceLEBT (Low Energy Beam Transport)

Operation and commissioning of IFMIF LIPAc Injector 10

An Emittance Diagram

26 August, 2016

e=0.201 pmm.mradD+ : D2+&D3+ = 90:10

Emit20150803-1153

Deuterium, 100keV, Iext=76mA, 10% duty cycle

D+

D2+

←D3+

Operation and commissioning of IFMIF LIPAc Injector 11

Emittance at 100keV D+ (10mmf)

26 August, 2016

Iext=93mAIext=90mA

Iext=80mAIext=70mAIext=60mA

e=0.148 pmm.mradD+ : D2&D3 = 90:10

e=0.124 pmm.mradD+ : D2&D3 = 92:8

e=0.108 pmm.mradD+ : D2&D3 = 92:8

e=0.110 pmm.mradD+ : D2&D3 = 92:8

e=0.112 pmm.mradD+ : D2&D3 = 93:7 Deuterium

100keVVIE=35kV2.1 SCCM10% duty cycle

Operation and commissioning of IFMIF LIPAc Injector 12

Emittance at 100keV D+ (10mmf)

26 August, 2016

There is an optimum extraction current and an optimum intermediate electrode voltage to minimize the emittance.

Operation and commissioning of IFMIF LIPAc Injector 13

Emittance vs. Duty cycle

26 August, 2016

Kr gas

It was observed that the emittance increases with the duty cycle.It was also observed that the emittance growth is improved by

increasing the gas flow rate or by injecting Kr gas into LEBT vacuum.

Operation and commissioning of IFMIF LIPAc Injector 14

Focusing by Solenoid Coils

26 August, 2016

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Neutron Production (I)

26 August, 2016

1) Neutron production is a linear function of the duty cycle.2) Neutron production is also a strong function of the deuterium

density implanted near the surface

Operation and commissioning of IFMIF LIPAc Injector 16

Neutron Production (II)

26 August, 2016

３） Neutron production is saturating at higher duty cycle and higher beam current. This is because the deuteron density is decreasing with increasing the temperature at the surface at higher power density.

Operation and commissioning of IFMIF LIPAc Injector 17

Beam current vs. RF Power (10mmf)

26 August, 2016

Extracted ion current increases almost lineally with the microwave power.By increasing the aperture diameter to 12mmf, which is the design value,

we can expect 160mA of Deuterium ion beam.

Deuterium

18

IFMIF/EVEDA

Conditioning of the ECR ion source with 12mmf plasma electrode

Deuterium100keV

ffff

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90% Duty Operation at 100keV

26 August, 2016

180ms pulse every 200ms

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DC Operation at 100keV/120mA

26 August, 2016

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Summary

26 August, 2016

Operation and commissioning of the IFMIF LIPAc Injector started in 2014 at Rokkasho site in Japan.

Up to now, 100keV/120mA/CW hydrogen and 100keV/90mA/CW deuterium ion beams have been produced stably from a 10mm diameter extraction aperture with a low beam emittance of 0.21 p.mm.mrad (rms, normalized).

Neutron production by D-D reaction up to 2.4x109 n/s has been observed in the deuterium operation.

Two more presentations in this conference- R. Gobin, et al., “Installation and first operation of the IFMIF Injector

at Rokkasho site”, MonPS05.- K. Shinto, et al., “Measurement of Ion Species in High Current ECR

H+/D+ Ion Source for IFMIF “, ThuPS18.