CIEMAT, Madrid, Spain
Fusion for Energy, Garching, Germany
CEA/DSM/IRFU, France
Universidad Complutense Madrid, Madrid, Spain
In the framework of the EU Roadmap, a DEMO Oriented Neutron Source (DONES) [*] has been proposed to provide a high neutron intense neutron source with a suitable neutron spectrum to understand the degradation of advanced materials under DEMO and future fusion plants irradiation conditions. DONES will be based on the International Fusion Materials Irradiation Facility IFMIF [**], being only one accelerator considered. The HEBT will be devoted to the transport, bending and shaping of the 40 MeV, 125 mA CW deuteron beam to the free surface of the rapidly flowing lithium target. To produce a forward peaked source of fusion-like neutrons, which stream through the target into the test cell, a rectangular uniform distribution across the flat top of the beam profile is required, being the footprint tailored in both the vertical and horizontal directions according to the target design. Different methods for beam uniformization in IFMIF accelerator has been proposed in the past [***]. Two main concerns in DONES will be the minimization of particle losses over the whole HEBT and the effect of the different shaping techniques on such strong space charge regime, specially on the beam halo modulation. A review of the different methods for the beam shaping of the high power, high space charge DONES HEBT beam will be depicted. A final solution will be proposed.
[*] DONES Conceptual Design Report, April 2014
[**] IFMIF Comprehensive Design Report, CDR, IFMIF International Team, January 2004
[***] IFMIF Intermediate Engineering Design Report
CIEMAT, Madrid, Spain
UNED, Madrid, Spain
IREC, Sant Adria del Besos, Spain
LIPAc* will be a 9 MeV, 125 mA CW deuteron accelerator which aims to validate the technology that will be used in the future IFMIF-DONES accelerator**. The acceleration of the beam will be carried out in two stages. An RFQ will increase the energy up to 5 MeV before a Superconducting RF (SRF) linac made of a chain of eight Half Wave Resonators bring the particles to the final energy. Between both stages, a Medium Energy Beam Transport line (MEBT)*** is in charge of transporting and matching the beam between the RFQ and the SRF. The transverse focusing of the beam is controlled by five quadrupole magnets with integrated steerers, grouped in one triplet and one doublet. Two buncher cavities surrounding the doublet handle the longitudinal dynamics. Two movable collimators are also included to purify the beam optics coming out the RFQ and avoid losses in the SRF. In this contribution, the final integrated design of the beamline will be shown, together with the auxiliaries. The manufacturing of all the components and the integration in the beamline will be depicted. The final tests carried out to the beamline prior to the installation in the accelerator will be also reported.
* P. Cara et al., IPAC16, to be published, Busan, Korea (2016).
** A. Ibarra et al., Fus. Sci. Tech., 66, 1, p. 252-259 (2014).
*** I. Podadera et al., IPAC11, San Sebastian, Spain (2011).
CIEMAT, Madrid, Spain
ANTEC Magnets SLU, Vizcaya, Spain
IREC, Sant Adria del Besos, Spain
The Medium Energy Beam Transport line (MEBT) that is being installed on the LIPAC accelerator* will have five quadrupole and steerer magnets which have been recently manufactured and tested. The design of the magnets was done by CIEMAT** and considers a magnetic yoke made of four solid iron quadrants joined together. The yoke integrates four water-cooled coils (quadrupole) and eight air-cooled coils (steerers) made of copper wires. The manufacturing and testing (excluded magnetic measurements) of the five magnets were carried out by the Spanish company ANTECSA. This paper focuses on the technical aspects considered during the manufacturing and the assembly of the different components of the magnets. The details about the geometrical, electrical and hydraulic measurements and tests that were carried out before the magnetic measurements are also described.
* A. Mosnier et al., IPAC10, MOPEC056, p.588, Kyoto, Japan (2010)
** C. Oliver et al., IPAC11, WEPO014, p. 2424, San Sebastián, Spain (2011)