Design of the high intensity exotic beams SPIRAL 2 project

International audienceThe SPIRAL 2 facility will be able to deliver stable heavy ion beams and deuteron beams at very high intensity, allowing to produce and accelerate light and heavy rare ion beams. The driver will accelerate a 5 mA deuteron beam up to 20 MeV/u and also q/A=1/3 heavy ions up to 14.5 MeV/u. The injector consist of the ion sources, a 4-vane RFQ and the low and medium beam transfer lines. It is followed by an independently phased superconducting linac with compact cryostats separated with warm focusing sections. The overall design and results of simulations with combined errors, the results of tests of prototypes for the most critical components are presented

The advancement of SPIRAL 2 project

International audienceAfter a detailed design study phase (2003-2004), the SPIRAL2 project at GANIL (Caen, France) was officially approved in May 2005, and is now in its phase of construction, with a project group in which many French laboratories (CEA,CNRS) and international partners are participants. The SPIRAL2 facility is composed of a multi-beam driver accelerator (5mA/40Mev deuterons, 5mA/33Mev protons, 1mA/14.5 Mev/u heavy ions), a dedicated building for the production of radioactive ion beams (RIBs), the existing cyclotron CIME for the post acceleration of the RIBs, and new experimental areas. It will deliver high intensity beams for radioactive ion production by the ISOL method (the main process being the fission of a uranium carbide target), and stable heavy ions for nuclear and interdisciplinary physics. A high intensity neutron flux will also be produced for irradiation and time-of-flight experiments. In this paper we describe the various parts of this facility, the results obtained with prototypes of several major components, the status of the construction itself, and the research and development which remains to be done in some domains, including safety aspects

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International audienceThe GANIL facility consists of three successive cyclotrons. The tuning of these cyclotrons and of the transfer beam lines isachieved in about 24 hours. Reducing this setting time would enable to increase the time allocated to physics experiments.New tools are realized for automatic beam tuning. These tools are expected to make the tuning easier, shorter and morereproducible

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International audienceThe GANIL facility consists of three successive cyclotrons. The tuning of these cyclotrons and of the transfer beam lines isachieved in about 24 hours. Reducing this setting time would enable to increase the time allocated to physics experiments.New tools are realized for automatic beam tuning. These tools are expected to make the tuning easier, shorter and morereproducible

Superconducting booster cyclotron studies at GANIL

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Avant projet d'un post-accélérateur de 500 MeV/A à GANIL : CSS3

La communauté des physiciens utilisateurs du GANIL a commencé en 1989 à réfléchir aux domaines de recherche que pourraient ouvrir l'existence à GANIL de faisceau d'ions à 500 MeV/nucléon dont les qualités optiques et les intensités seraient équivalentes à celles attendues après l’achèvement de l'Opération d'Augmentation d'Intensité (phases 1 et 2)

Open data from the third observing run of LIGO, Virgo, KAGRA, and GEO

The global network of gravitational-wave observatories now includes five detectors, namely LIGO Hanford, LIGO Livingston, Virgo, KAGRA, and GEO 600. These detectors collected data during their third observing run, O3, composed of three phases: O3a starting in 2019 April and lasting six months, O3b starting in 2019 November and lasting five months, and O3GK starting in 2020 April and lasting two weeks. In this paper we describe these data and various other science products that can be freely accessed through the Gravitational Wave Open Science Center at https://gwosc.org. The main data set, consisting of the gravitational-wave strain time series that contains the astrophysical signals, is released together with supporting data useful for their analysis and documentation, tutorials, as well as analysis software packages

Safety and radioprotection issues with post-accelerated high intensity RIBs

Radioactive ion beams have been produced with the ISOL method for more than 35 years in several laboratories all over the world. The intensities and the variety of nuclei have been always growing, and while the ISOL beams were first used at ion source extraction energy, post-accelerated RIBs became available following the pioneering work at Louvain-la-Neuve. Meanwhile, a powerful production method was developed with the use of fission products extracted from fissile targets, and is nowadays used at several places. The next facilities, under construction and those of next generation, will use fission as one of the main production methods for RIBs and will offer orders of magnitude higher intensities. The post-acceleration of such high intensity and long lived RIBs implies many new constraints. This paper presents these constraints for the facilities under construction and those of next generation, focusing on the safety and radioprotection issues