scholarly journals First steps toward the development of SONATE, a Compact Accelerator driven Neutron Source

2020 ◽  
Vol 239 ◽  
pp. 17011
Author(s):  
Loïc Thulliez ◽  
Alain Letourneau ◽  
Jérôme Schwindling ◽  
Nicolas Chauvin ◽  
Nadia Sellami ◽  
...  

Facilities providing bright thermal neutron beams are of primary importance for various research topics such as condensed matter experiments, neutron-imaging or medical applications. Currently these are mainly spallation sources and nuclear reactors. However, these later facilities are ageing and the political context does not favor the building of new ones. This is the case in CEA-Saclay (France), where the Orphee reactor is planned to shutdown in 2019. Therefore, another local facility, affordable by one country, able to provide high brilliance neutron beams has to be built. At CEA-Saclay, a compact accelerator driven neutron source, SONATE, is investigated in taking advantage of the IPHI accelerator able to deliver a 3 MeV proton beam with an intensity up to 100 mA. In the future, SONATE is foreseen to operate with 20 MeV protons to increase the neutron brightness. In addition to the difficulties to operate such high intensity accelerators, the other challenges regard the target-moderator-reflector (TMR) design which is crucial to maximize the neutron flux at the detector location. At CEA-Saclay, several experiments were performed between 2016 and 2019 with the IPHI accelerator. Geant4 simulations were also developed. They demonstrate the feasibility of such concept and enable to find the best TMR configuration for the future SONATE facility. These developments are reported in this article.

2020 ◽  
Vol 10 (4) ◽  
pp. 38-43
Author(s):  
MARIETA EPREMYAN ◽  

The article examines the epistemological roots of conservative ideology, development trends and further prospects in political reform not only in modern Russia, but also in other countries. The author focuses on the “world” and Russian conservatism. In the course of the study, the author illustrates what opportunities and limitations a conservative ideology can have in political reform not only in modern Russia, but also in the world. In conclusion, it is concluded that the prospect of a conservative trend in the world is wide enough. To avoid immigration and to control the development of technology in society, it is necessary to adhere to a conservative policy. Conservatism is a consolidating ideology. It is no coincidence that the author cites as an example the understanding of conservative ideology by the French due to the fact that Russia has its own vision of the ideology of conservatism. If we say that conservatism seeks to preserve something and respects tradition, we must bear in mind that traditions in different societies, which form some kind of moral imperatives, cannot be a single phenomenon due to different historical destinies and differing religious views. Considered from the point of view of religion, Muslim and Christian conservatism will be somewhat confrontational on some issues. The purpose of the work was to consider issues related to the role, evolution and prospects of conservative ideology in the political reform of modern countries. The author focuses on Russia and France. To achieve this goal, the method of in-depth interviews with experts on how they understand conservatism was chosen. Already today, conservatism is quite diverse. It is quite possible that in the future it will transform even more and acquire new reflections.


2019 ◽  
Vol 66 ◽  
pp. 327-334
Author(s):  
Inga V. Zheltikova ◽  
Elena I. Khokhlova

The article considers the dependence of the images of future on the socio-cultural context of their formation. Comparison of the images of the future found in A.I. Solzhenitsyn’s works of various years reveals his generally pessimistic attitude to the future in the situation of social stability and moderate optimism in times of society destabilization. At the same time, the author's images of the future both in the seventies and the nineties of the last century demonstrate the mismatch of social expectations and reality that was generally typical for the images of the future. According to the authors of the present article, Solzhenitsyn’s ideas that the revival of spirituality could serve as the basis for the development of economy, that the influence of the Church on the process of socio-economic development would grow, and that the political situation strongly depends on the personal qualities of the leader, are unjustified. Nevertheless, such ideas are still present in many images of the future of Russia, including contemporary ones.


2018 ◽  
pp. 173-189
Author(s):  
Elena Borisenok

The article focuses on the analysis of the memoirs of the political and military officials that served Hetman P. Skoropadskyi. Their positions toward “Ukrainian question”, Hetman regime, views on the future of the Russian state etc. are studied.


2017 ◽  
pp. 126-169
Author(s):  
S.E. Tariverdieva

The article deals with the development of the coregency system of Augustus and Agrippa from 29 to 18 BC: from formal and actual disparity of the coregents to their formal equality with the dominance of the princeps auctoritas. Particular attention is paid to the earlier stages of this development and to the crisis of 23 BC. The coregency system created by Augustus is often regarded by modern historians as means of ensuring uninterrupted succession of power. Agrippa as his coregent often is thought to have assumed the role of the regent who temporally replaces the princeps, just as it was in formal monarchies, or that of the tutor of the future rulers. However, the Roman system of state administration did not allow such type of regency. The princeps coregent, who was his equal in formal credentials but his inferior in terms of auctoritas, in case of the princeps death had to become the next princeps as his immediate successor. It is unlikely that later he was expected to voluntarily give up his power in favour of younger heir and to vanish from the political life altogether. The inheritance system under Augustus was like a ladder with the princeps at the top, the coregent who was also the immediate successor one step below, heirs of the next degree further down. In case of death of one of them, successors shifted one step up. The coregency had one more function: geographically it allowed Augustus and Agrippa to rule jointly the empire while staying in different parts of it.В статье исследуется развитие системы соправления Августа и Агриппы с 29 по 12 гг. до н. э.: от формального и фактического неравенства соправителей до их формального равенства при преобладании auctoritas принцепса, причём особое внимание уделяется раннему этапу этого развития и кризису 23 г. до н. э. Институт соправления, созданный Августом, часто рассматривается, как средство обеспечения бесперебойного перехода власти, причем Агриппе, как соправителю, НЕРЕДКО отводится роль регента, временно замещающего принцепса или воспитателя будущих правителей. Однако римская система государственного управления не предполагала регентства. Соправитель принцепса, равный ему по формальным полномочиям, но уступавший по auctoritas, в случае его смерти должен был СТАТЬ следующим принцепсом, ближайшим его наследником. Вряд ли предполагалось, что в будущем он должен добровольно уступить власть более молодому наследнику и исчезнуть из политической жизни. Система наследования при Августе представляла собой нечто вроде лестницы, на вершине которой стоял принцепс, на следующей ступени соправитель, он же избранный преемник, ниже наследники следующей очереди в случае смерти когото из них происходило продвижение наследников по ступеням вверх. Кроме того, соправление имело и иное значение позволяло Августу и Агриппе совместно управлять империей, находясь в разных ее частях.


2007 ◽  
Vol 61 (1) ◽  
pp. 95-111
Author(s):  
Virginie Collombier

Beyond the relative opening of the political system that characterized 2005 in Egypt — with the President being elected directly for the first time and the increased competition allowed during legislative elections — the 2005 elections also constituted an opportunity to consider and evaluate the internal struggles for influence under way within the ruling National Democratic Party (NDP). In a context largely influenced by the perspective of President Husni Mubarak's succession and by calls for reform coming from both internal and external actors, changes currently occurring at the party level may have a decisive impact on the future of the Egyptian regime.


Author(s):  
Frédéric Grare

India’s relationship with the United States remains crucial to its own objectives, but is also ambiguous. The asymmetry of power between the two countries is such that the relationship, if potentially useful, is not necessary for the United States while potentially risky for India. Moreover, the shift of the political centre of gravity of Asia — resulting from the growing rivalry between China and the US — is eroding the foundations of India’s policy in Asia, while prospects for greater economic interaction is limited by India’s slow pace of reforms. The future of India-US relations lies in their capacity to evolve a new quid pro quo in which the US will formulate its expectations in more realistic terms while India would assume a larger share of the burden of Asia’ security.


Author(s):  
Julio Baquero Cruz

This chapter analyses another area of Union law that is highly controversial and relevant in structural terms—the protection of fundamental rights. It discusses the scope and standard of the protection offered at Union level, the consequences for national law, and the implications of the future accession of the Union to the European Convention on Human Rights. These issues are of fundamental importance for the integrity of Union law and of wider significance for the political understanding of the Union.


2021 ◽  
pp. 1-14
Author(s):  
Marius Rimmler ◽  
Olaf Felden ◽  
Ulrich Rücker ◽  
Helmut Soltner ◽  
Paul Zakalek ◽  
...  

The High-Brilliance Neutron Source project (HBS) aims at developing a medium-flux accelerator-driven neutron source based on a 70 MeV, 100 mA proton accelerator. The concept optimizes the facility such that it provides high-brilliance neutron beams for instruments operating at different time structures. This can be realized by generating an interlaced proton pulse structure, which is unraveled and sent to three different target stations by a multiplexer system. In the following we present the developments of a multiplexer system at the JULIC accelerator at Forschungszentrum Jülich GmbH (FZJ), which serves as test facility for HBS. The main components of the JULIC multiplexer system are designed to be scalable to the HBS parameters.


2021 ◽  
pp. 1-10
Author(s):  
Roman M. Frolov

In his Bellum Ciuile, Caesar reports the events of 1 January 49 with these words (1.3.1): misso ad uesperum senatu omnes qui sunt eius ordinis a Pompeio euocantur. laudat <promptos> Pompeius atque in posterum confirmat, segniores castigat atque incitat. When the Senate had been dismissed towards dusk, all who belonged to that order were summoned by Pompeius. He praised the determined and encouraged them for the future while criticizing and stirring up those who were less eager to act. This meeting has not attracted much scholarly attention and admittedly for a good reason: other circumstances of the outbreak of the Civil War are, perhaps, more significant for understanding the events as well as the intentions and decisions of the political actors. The importance of this gathering lies, however, not so much in what its role might have been in the developments of the year 49 but rather in the context of the phenomenon of the promagistrates’ interference in the domestic politics of Late Republican Rome.


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