scholarly journals Conceptual Design of a HTS Dipole Insert Based on Bi2212 Rutherford Cable

Instruments ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 29
Author(s):  
Alexander V Zlobin ◽  
Igor Novitski ◽  
Emanuela Barzi

The U.S. Magnet Development Program (US-MDP) is aimed at developing high-field accelerator magnets with magnetic fields beyond the limits of Nb3Sn technology. Recent progress with composite wires and Rutherford cables based on the first generation high-temperature superconductor Bi2Sr2CaCu2O8−x (Bi2212) allows considering them for this purpose. However, Bi2212 wires and cables are sensitive to transverse stresses and strains, which are large in high-field accelerator magnets. This requires magnet designs with stress management concepts to control azimuthal and radial strains in the coil windings and prevent the degradation of the current carrying capability of Bi2212 conductor or even its permanent damage. This paper describes a novel stress management approach, which was developed at Fermilab for high-field large-aperture Nb3Sn accelerator magnets, and is now being applied to high-field dipole inserts based on Bi2212 Rutherford cables. The insert conceptual design and main parameters, including the superconducting wire and cable, as well as the coil stress management structure, key technological steps and approaches, test configurations and their target parameters, are presented and discussed.

2015 ◽  
Vol 8 (3) ◽  
pp. 276-283
Author(s):  
Travis L. Almquist ◽  
Katie L. Wirt ◽  
Jason W. Adams ◽  
Rodney G. Lym

AbstractYellow toadflax (Linaria vulgaris P. Mill.) infestations in North Dakota increased 300-fold from 1997 to 2011, when the plant was added to the state noxious weed list. Long-term control of other invasive species had included biological control agents, but no effective agents for yellow toadflax had been identified, so a control program using herbicides was needed. The objective was to shift from short-term control with picloram applied in the fall at maximum allowed rates to long-term management with minimal nontarget species impact with an adaptive management approach. Yellow toadflax control was increased from an average of 64% with picloram at 1,120 g ha−1 alone 12 mo after treatment (MAT) to over 90% when applied with diflufenzopyr while the picloram rate was reduced 50%. Yellow toadflax control with aminocyclopyrachlor applied at 140 g ha−1 ranged from 91 to 49% 12 MAT when applied in June or September, respectively. In contrast, yellow toadflax control with picloram plus dicamba plus diflufenzopyr averaged > 90% regardless of application date during the growing season. Land managers now have at least two options for long-term yellow toadflax control with a wide window of application timing. The goal of replacing a single high-use–rate herbicide treatment was met but both picloram and aminocyclopyrachlor can injure many desirable forbs. However, application timing can now be adjusted to have the least impact on nontarget species. The adaptive development program led to a 58% reduction in yellow toadflax infestations in North Dakota by 2014.


2007 ◽  
Vol 17 (2) ◽  
pp. 1027-1030 ◽  
Author(s):  
N. Andreev ◽  
E. Barzi ◽  
E. Borissov ◽  
L. Elementi ◽  
V. S. Kashikhin ◽  
...  

Author(s):  
Viju Mathew

Knowledge management (KM) has been sprouting as one of the outstanding conversant factor strongly in trust, and trust is a critical precondition to knowledge learning and sharing management concepts (Mathew, 2008). The chapter intended to bring forward various KM strategies specially framed for the service industries looking forward for the global market and need to create advantage in providing customer satisfaction and enhancing the growth prospects, applications in organizations, indicate how to improve knowledge based performance and act a base for the service industry for developing innovation, creating global opportunities for better service. The case study highlighting knowledge strategies is designed to achieve the required knowledge sharing and output. Open-ended and closed-ended strategies plays a significant role in collaborative learning, development, building the potential and providing the knowledge creation and sharing capacities needed for strategic formulation and decision making to create competitiveness.


2015 ◽  
Vol 760 ◽  
pp. 721-726 ◽  
Author(s):  
Rodica Rohan ◽  
Nicolae Ionescu

Currently in Romania it has been implemented the European Qualifications Framework (EQF) and its sustainability has become an impending need. In this paper, the authors propose an integrating structure, which involves a relatively large number of organizations for the sustainability of the National Qualifications Framework (CNC), while also providing quality assurance in higher education. Using quality management principles and their implementation stages as generic conceptual solutions, there have been established the specific conceptual solutions for the conceptual design of a system which the authors have called the System of Implementation and Sustainability of the National Qualifications Framework in Higher Education (SIS - CNCIS). It was then prepared the detailed design of the SIS-CNCIS for the particular case of implementation in Industrial Engineering.


Author(s):  
Jasmina Trajkovski ◽  
Ljupcho Antovski

This paper presents an overview of the proposed risk management framework and how it is designed to meet the challenges usually faced by IT-centric micro and small companies when implementing risk management. The issues and challenges identified for the IT-centric micro and small companies are centered around the exposure to various risks and necessity to have a risk management approach which covers these various risks, as well as to limited resources for risk management and necessity for usable and comprehensive framework. The new framework is based on the analysis of the best practices in risk management concepts as well as direct experience from dealing with over 20 companies in South-east Europe. The segments covered by the framework include people, policy, methodology and process, and tools.


Instruments ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 17
Author(s):  
Tengming Shen ◽  
Laura Garcia Fajardo

Superconducting magnets are an invaluable tool for scientific discovery, energy research, and medical diagnosis. To date, virtually all superconducting magnets have been made from two Nb-based low-temperature superconductors (Nb-Ti with a superconducting transition temperature Tc of 9.2 K and Nb3Sn with a Tc of 18.3 K). The 8.33 T Nb-Ti accelerator dipole magnets of the large hadron collider (LHC) at CERN enabled the discovery of the Higgs Boson and the ongoing search for physics beyond the standard model of high energy physics. The 12 T class Nb3Sn magnets are key to the International Thermonuclear Experimental Reactor (ITER) Tokamak and to the high-luminosity upgrade of the LHC that aims to increase the luminosity by a factor of 5–10. In this paper, we discuss opportunities with a high-temperature superconducting material Bi-2212 with a Tc of 80–92 K for building more powerful magnets for high energy circular colliders. The development of a superconducting accelerator magnet could not succeed without a parallel development of a high performance conductor. We will review triumphs of developing Bi-2212 round wires into a magnet grade conductor and technologies that enable them. Then, we will discuss the challenges associated with constructing a high-field accelerator magnet using Bi-2212 wires, especially those dipoles of 15–20 T class with a significant value for future physics colliders, potential technology paths forward, and progress made so far with subscale magnet development based on racetrack coils and a canted-cosine-theta magnet design that uniquely addresses the mechanical weaknesses of Bi-2212 cables. Additionally, a roadmap being implemented by the US Magnet Development Program for demonstrating high-field Bi-2212 accelerator dipole technologies is presented.


2019 ◽  
Vol 90 (5) ◽  
pp. 053302 ◽  
Author(s):  
Dániel Barna ◽  
Martin Novák ◽  
Kristóf Brunner ◽  
Glyn Kirby ◽  
Brennan Goddard ◽  
...  

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 276-276
Author(s):  
Debritu Satato ◽  
Anne Hatløy ◽  
Bernt Lindtjørn ◽  
Elazar Balla

Abstract Objectives Moderate acute malnutrition (MAM) is widespread and a persistent public health problem in developing countries. Currently, the management approach of MAM is focused on food supplementation, but it is limited to chronically food-insecure areas. This study aims to develop local-ingredients based supplement (LIBS) and evaluate if it is comparable to the corn-soya blend plus (CSB+) in treating MAM among children aged 6 to 59 months in Wolaita, Ethiopia. Methods Collection of food ingredients that have the potential for making LIBS was done. Sorting, soaking, roasting, and milling of ingredients were done. The LIBS, with an improved amount of nutrients, was used to test the effectiveness in treating MAM. To evaluate the effectiveness of LIBS compared with CSB+ in treating MAM, we used a randomized controlled non-inferiority trial among 324 moderately wasted children aged 6 to 59 months in Wolaita, Ethiopia. The daily ration was: 100 gm of LIBS plus 25.2 gm of sugar with 8 ml oil in the intervention group and 150 gm of CSB+ with 16 ml of oil in the control group. A chi-square test was used for the comparison of recovery rates between two groups. Kaplan-Meier (log-rank) survival analysis was done to estimate the recovery time and survival curves. Results Four food samples of LIBS were made with different portions of ingredients. One of the LIBS with the highest portion of pumpkin seed and selected for testing had an improved amount of protein, fat, energy, iron, zinc and potassium contents. Its proximate composition indicated protein and fat contents of 22.6 g/100 g and 32.9 g/100 g respectively. The trial results showed that there is no difference in baseline characteristics between the two groups (p > 0.05). The recovery rate for LIBS (n = 105 of 162; 64.8%) was similar to that for CSB+ (n = 108 of 162; 66.7%) (P = 0.6). The duration of recovery was similar for the LIBS group, with a median of 56 days compared to 63 days for the CSB+ group (P = 0.92). Conclusions The LIBS has contained adequate amount of nutrients needed for the treatment of MAM. There was no difference in recovery rates as well as recovery times for those who received LIBS and those who received CSB+ . Thus, LIBS has the same potential to treat MAM as CSB+ . Funding Sources Norwegian Agency for Development Cooperation (NORAD); Norwegian Program for Capacity Development in Higher Education and Research for Development Program (NORHED).


2004 ◽  
Vol 08 (03) ◽  
pp. 261-274 ◽  
Author(s):  
EL-SAYED ABOU-ZEID ◽  
QIANZHEN CHENG

With the emergence of knowledge management (KM) as a new discipline for studying what needs to be done in order to get the most out of organizational knowledge resources, linking knowledge management and innovation becomes a necessity. Nevertheless, there are few studies that address the relationship between KM and innovation. While the thing- and process-oriented approaches adopted in these studies are helpful in understanding the relationship between knowledge management concepts and innovation concepts, they have failed to account for the impact of this relationship on the effectiveness of the innovation process. In order to study this impact, cognitive fit theory is used to develop a model that describes how the compatibility between knowledge manipulating activities and the type of knowledge associated with innovation will affect the success of the innovation process.


2006 ◽  
Vol 19 (1) ◽  
pp. 2-9 ◽  
Author(s):  
Jo Lynne W. Robins ◽  
Nancy L. McCain ◽  
D. Patricia Gray ◽  
R.K. Elswick ◽  
Jeanne M. Walter ◽  
...  

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