The TULIP project : first on-line result and near future

The TULIP project aims to produce radioactive ion beams of short-lived neutron-deficient isotopes by using fusion-evaporation reactions in an optimized Target Ion Source System (TISS). The first step consisted of the design of a TISS to produce rubidium isotopes. It was tested with a primary beam of $^{22}$[email protected] MeV/A irradiating a natural Ni target at the SPIRAL1/GANIL facility in March 2022. Rates of $^{76,78}$Rb were measured as well as an exceptionally short atom-to-ion transformation time for an ISOL system, of the order of 200 \mathrm{\micro}s. The second step of the project aims at producing neutron-deficient short-lived metallic isotopes in the region of $^{100}$Sn. A "cold" prototype has been realized to study the electron impact ionization in the TISS cavity and a "hot" version is under construction to prepare an on-line experiment expected in the near future

Optimisation de la transformation génétique de la pomme de terre par Agrobacterium tumefaciens. Utilisation de la résistance à l'hygromycine comme marqueur sélectif

Optimization of potato genetic transformation by Agrobacterium tumefaciens using hygromycin resistance as selective marker. The objective of this work is the optimization of a genetic transformation and a regeneration protocol of transgenic plants in Solanum tuberosum cv Désirée using hygromycin resistance as selective marker. The gene Cat2 of Nicotiana plumbaginifolia and the gene SU2 of Gossypium hirsutum, both coding for catalases, have been used. Two antibiotic concentrations (5 and 10 mg . l -1 of culture medium) combined with two preculture periods (5 and 20 days) on non-selective medium were tested. Coculture medium was supplemented with 10 mg . l -1 of acetosyringone to test its effect on potato transformation. The addition of this phenolic compound to the coculture medium affected positively the regeneration aptitude of transgenic SU2 plants. Only the combination of 5 mg . l -1 of hygromycin and 20 days of preculture without antibiotic allowed the obtention of plants transformed with the gene SU2. Screening of the rooted shoots with PCR showed 45% of transgenic plants for both molecular constructions used

Grain size influence on the release of radioactive isotopes out of target materials made of powder

Radioactive ion beam production by Isotope Separator On Line method (ISOL) has motivated the construction of several nuclear facilities over the world. The method consists in impinging solid target material with beams of stable nucleus. Radioactive nuclei produced during the collision are stopped in the target material and must diffuse out of it as fast as possible to transform them into ions before their radioactive decay. The release time must thus be as short as possible to avoid their losses. The release of the nuclei depends on several parameters, which are related to the chemistry of the atoms in the target matrix, to the geometry and micro-structure of the target, and to its temperature. In the case of targets made of grains, we assumed that an optimum grain size of the grains existed. To make possible its easy determination, we aimed to calculate it analytically. Thus we have built a description of the propagation of the atoms in the target material, while conserving the different physico-chemical parameters and avoiding the use of adjustable parameters. The description of the propagation process will be presented as well as the assumptions. Finally, the optimum grain size will be given for the radioactive Ar atoms out of graphite

GANIL operation status and upgrade of SPIRAL1

International audienceThe GANIL facility (Caen, France) is dedicated to the acceleration of heavy ion beams for nuclear physics, atomic physics, radiobiology and material irradiation. The production of stable and radioactive ion beams for nuclear physics studies represents the main part of the activity. The exotic beams are produced by the Isotope Separation On-Line method with SPIRAL1 facility. It is running since 2001, producing and post-accelerating radioactive ion beams. The review of the operation from 2001 to 2011 is presented. Because of the physicist demands, the facility is about to be improved with the project Upgrade SPIRAL1. The goal of the project is to extend the range of post-accelerated exotic beams available. The upgrade of the "Système de Production d'Ions Radioactifs en Ligne" phase I (SPIRAL1) is in progress and should be ready by 2015

Building a Japanese Manga Collection for Non-Traditional Patrons in an Academic Library

This chapter describes how the Penn Libraries began collecting Japanese- and Korean-language comics, focusing largely on manga from Japan aimed at engaging language students and instructors with Japanese library materials. These patrons are a non-traditional demographic typically not targeted by Japanese-language collecting in academic libraries. Penn’s initial approach to this collection has likewise been non-traditional, as we looked to fan and commercial portals for popular audiences to assess the pulse of contemporary publishing in Japan, rather than relying solely on library-facing resources such as WorldCat or publisher advertisements. We advocate for a holistic approach to collecting manga that embraces: dialogue with previously underserved patrons; surveys of varied online sources like marketplaces, fan websites, and social media; and active awareness of current, socially relevant topics in Japan. The methods we describe to identify, catalog, and provide bibliographic access to Japanese comic material in a library setting can be applied even in libraries that do not have staff with expertise in the language. We encourage other libraries to explore partnerships with institutions like the Penn Libraries in their communities or via interlibrary lending, who have the staff expertise and resources to develop more extensive Japanese-language manga collections. In turn, institutions such as ours have an opportunity to serve as leaders in collecting and making their collections available to the broader community

Leveraging Local Networks and International Partnerships in Japanese Collection Development

This chapter details the development of the Penn Libraries’ Japanese Naval Collection, from its inception in a student’s scrapbook discovery to the iterative process of searching for and purchasing Imperial Japanese Navy Training Fleet materials and related items. It also encompasses promotion of the collection online by making digital facsimiles available and posting about its context and import on social media. Des Jardin and Williams re-envision the acquisitions, cataloging, digitization, and promotion process as the result of a network of individuals (both inside and outside the library) collaborating toward a shared vision of special collections. They integrate processes rather than functioning as a unidirectional assembly line in which component parts can be be passed down a pipeline. Through a network of individuals who share their complementary but unique skills and knowledge, formerly compartmentalized area studies materials can be more cohesively unified into a global collection and enhance the value of the library’s distinctive special and research collections in an increasingly international context

The acceleration and storage of radioactive ions for a neutrino factory

The term beta-beam has been coined for the production of a pure beam of electron neutrinos or their antiparticles through the decay of radioactive ions circulating in a storage ring. This concept requires radioactive ions to be accelerated to a Lorentz gamma of 150 for 6He and 60 for 18Ne. The neutrino source itself consists of a storage ring for this energy range, with long straight sections in line with the experiment(s). Such a decay ring does not exist at CERN today, nor does a high-intensity proton source for the production of the radioactive ions. Nevertheless, the existing CERN accelerator infrastructure could be used as this would still represent an important saving for a beta-beam facility. This paper outlines the first study, while some of the more speculative ideas will need further investigations.Comment: Accepted for publication in proceedings of Nufact02, London, 200

Method for Efficiency and Time Response Measurement on Diverse Target Ion Sources with Stable Alkali

International audienceDevelopments of new setups for radioactive ion beam production by the isotope-separator-on-line (ISOL) method are underway at GANIL in the frame of the SPIRAL (Système de Production d'Ions Radioactifs Accélérés en Ligne) and SPIRAL-II projects. The measurement of total efficiency and time behaviour of these new target/ion-source systems (TISSs) is a crucial step for these devices which aims to produce short-lived isotopes with high intensity. The overall atom-to-ion transformation efficiency depends on several processes: diffusion of the atoms out of the production target, effusion towards the ion source and ionization. The efficiency can be extracted using the ratio between the emerging yield and implanted flux in the TISS. Several methods have already been developed to achieve these measurements: the use of stable or radioactive beams, gas injection, or the introduction of solid material into the TISS. This paper focuses primarily on a method that uses stable alkali. A pulsed/CW alkali ion gun has been built and will be used to optimise diverse TISSs

Distributed forcing of the flow past a blunt-based axisymmetric bluff body

In this paper we address the influence of a blowing/suction-type distributed forcing on the flow past a blunt-based axisymmetric bluff body by means of direct numerical simulations. The forcing is applied via consecutive blowing and suction slots azimuthally distributed along the trailing edge of the bluff body. We examine the impact of the forcing wavelength, amplitude and waveform on the drag experienced by the bluff body and on the occurrence of the reflectional symmetry preserving (RSP) and reflectional symmetry breaking (RSB) wake modes, for Reynolds numbers 800 and 1000. We show that forcing the flow at wavelengths inherent to the unforced flow drastically damps drag oscillations associated with the vortex shedding and vorticity bursts, up to their complete suppression. The overall parameter analysis suggests that this damping results from the surplus of streamwise vorticity provided by the forcing, that tends to stabilize the ternary vorticity lobes observed at the aft part of the bluff body. In addition, conversely to a blowing-type or suction-type forcing, the blowing/suction-type forcing involves strong nonlinear interactions between locally decelerated and accelerated regions, severely affecting both the mean drag and the frequencies representative of the vortex shedding and vorticity bursts