Energy Recovery Linacs for Light Sources

2010 ◽  
Vol 03 (01) ◽  
pp. 121-146 ◽  
Author(s):  
Ryoichi Hajima
Keyword(s):  
Energy Recovery ◽  
Electron Beams ◽  
Current Status ◽  
Light Sources ◽  
Research Activities ◽  
Superconducting Cavities ◽  
Average Current ◽  
Γ Rays ◽  
Critical Components ◽  
Longitudinal Phase

Energy recovery linacs (ERLs), which can generate an electron beam having a high average current and a small-emittance with the complete manipulation of electron beams in the transverse and the longitudinal phase space, are expected to realize future light sources for various photon energies from terahertz to x- and γ-rays. In this paper, we present an overview of the history, current status, and prospects of ERLs for light sources. Research activities on the critical components of the ERLs, such as electron guns and superconducting cavities, are also described.

scholarly journals Concept of circular-linear energy recovery accelerator to probe the energy frontier

2022 ◽  
Vol 17 (01) ◽  
pp. P01011
Author(s):  
I.V. Konoplev ◽  
S.A. Bogacz ◽  
Y. Shashkov ◽  
M.A. Gusarova
Keyword(s):  
Energy Recovery ◽  
High Energy Physics ◽  
Beam Quality ◽  
High Energy ◽  
Light Sources ◽  
Linear Accelerators ◽  
200 Gev ◽  
Average Current ◽  
New Research ◽  
Energy Frontier

Abstract Energy-frontier accelerators provide powerful tools performing high precision measurements confirming the fundamentals of the physics and broadening new research horizons. Such machines are either driven by circular or linear accelerators. The circular machines, having the centre-of-mass (CM) energy values reaching 200 GeV (for leptons) and above, experience beam energy loss and quality dilution, for example, due to synchrotron radiation, limiting the overall CM energy achievable and requiring a constant energy top-up to compensate the loss and the beam quality dilution. Linear colliders overcome these limitations, while the finite capabilities of generating high average current beams limits the luminosity. This is partially compensated by the quality of the colliding beams. In this work, we suggest a novel design of circular-linear accelerator based on the merging of the “non-emitting”, low-energy storage rings and energy recovery linear accelerators. We suggest using the recently considered dual-axis asymmetric cavities to enable the operation of such a system, and in particular the energy recovery from spent, high-intensity beams. The machine considered, under the scope of the SNOWMASS-2021 initiative, can be potentially used to reach ultimate energy frontiers in high-energy physics as well as to drive next generation light sources. The merging of circular and linear systems, and applications of dual axes cavities, should allow the maintaining of high beam quality, high luminosity, and high energy efficiency, while offering a flexible energy management and opening clear opportunity for reducing the running cost. We note that the numbers shown in the paper are for illustration purpose and can be improved further.

scholarly journals Commentary to 18F-GP1, a Novel PET Tracer Designed for High-Sensitivity, Low-Background Detection of Thrombi: Imaging Activated Platelets in Clots—Are We Getting There?

2018 ◽  
Vol 17 ◽  
pp. 153601211774905
Author(s):  
Andrew W. Stephens ◽  
Norman Koglin ◽  
Ludger M. Dinkelborg
Keyword(s):  
Thrombus Formation ◽  
High Sensitivity ◽  
Current Status ◽  
Future Research ◽  
Current Standard ◽  
Heart Attacks ◽  
Activated Platelets ◽  
Pet Tracer ◽  
Causes Of Mortality ◽  
Critical Components

Thrombus formation can lead to heart attacks, stroke and pulmonary embolism, which are major causes of mortality. Current standard diagnostic imaging methods detect anatomic abnormalities such as vascular flow impairment but have limitations. By using a targeted molecular imaging approach critical components of a pathology can be selectively visualized and exploited for an improved diagnosis and patient management. The GPIIb/IIIa receptor is abundantly and specifically exposed on activated platelets and is the key receptor in thrombus formation. This commentary describes the current status of GPIIb/IIIa-based PET imaging approaches with a focus on the recently published preclinical data of the small-molecule PET tracer 18F-GP1. Areas of future research and potential clinical applications are discussed that may lead to an improved detection of critical thromboembolic events and an optimization of available antithrombotic therapies by tracking activated platelets.

scholarly journals Advances at TRIUMF-ISAC and decay of neutron-rich Cd studied with GRIFFIN

2018 ◽  
Vol 193 ◽  
pp. 04011
Author(s):  
P.E. Garrett ◽  
N. Bernier ◽  
R. Dunlop ◽  
A.D. MacLean ◽  
V. Bildstein ◽  
...  
Keyword(s):  
Time Distribution ◽  
Ground States ◽  
Neutron Number ◽  
Current Status ◽  
Neutron Decay ◽  
Delayed Neutron ◽  
Abundance Peak ◽  
Γ Rays ◽  
Γ Ray

The β-decay half lives of nuclei near the r-process path are critical information required for abundance calculations, especially those near neutron number N = 82. Specifically, the nuclei below doubly-magic 132Sn are key, and play an important role in the formation and shape of the second r-process abundance peak. The half lives in this region are challenging to measure due to the significant β-delayed neutron decay branches and the population of isomeric states with half lives comparable to the ground states. However, by measuring the time distribution of γ rays, these complications can be eliminated. This requires, however, a very effcient γ-ray spectrometer since the production of isotopes in this region is very limited. The new GRIFFIN array at TRIUMF-ISAC provides the high effciency required for these measurements. Recent improvements in the quality of the beams produced at TRIUMF, employing the IG-LIS device, are outlined, as well as the current status of the ARIEL facility. The GRIFFIN spectrometer and its use are briefly described. The experiment to measure the half lives of 128-130Cd is outlined and the results given, and some examples of the power of GRIFFIN to expand decay schemes, specifically for the decay of 128Cd to 128In, are given.

Keeping Rong from Wrong: The Identification and Protection of Traditional Intellectual Property in Chuuk, Federated States of Micronesia

2009 ◽  
Vol 16 (3) ◽  
pp. 273-290 ◽  
Author(s):  
James D. Nason ◽  
Joakim Peter
Keyword(s):  
Native American ◽  
Intellectual Property ◽  
Traditional Knowledge ◽  
Pacific Islands ◽  
Current Status ◽  
Federated States Of Micronesia ◽  
Research Activities ◽  
Chuuk State ◽  
Control Research ◽  
Model Law

AbstractThis discussion reviews the differences between traditional Micronesian principles regarding traditional knowledge, or ‘esoteric’ knowledge, and Western copyright laws, which have been used in the expropriation and legal alienation of traditional knowledge. We consider this conflict in relation to contemporary Native American intellectual property issues and tribal responses for the protection of such knowledge and to control research activities. This is compared with the recent international and Pacific Islands governments' concerns and actions regarding commodification and misappropriation of traditional knowledge, including the new Pacific Model Law. Finally, we review the nature of traditional knowledge in Chuuk State and its current status and recommend specific steps that the Federated States of Micronesia might take legislatively to protect traditional knowledge as part of its significant cultural heritage.

scholarly journals Dynamics of longitudinal phase-space modulations in an rf compressor for electron beams

2010 ◽  
Vol 13 (8) ◽  
Author(s):  
M. Venturini ◽  
M. Migliorati ◽  
C. Ronsivalle ◽  
M. Ferrario ◽  
C. Vaccarezza
Keyword(s):  
Phase Space ◽  
Electron Beams ◽  
Longitudinal Phase

RECENT DEVELOPMENTS AND FUTURE PERSPECTIVES OF LEAD-FREE FERROELECTRICS

2010 ◽  
Vol 03 (01) ◽  
pp. 1-4 ◽  
Author(s):  
RÜDIGER-A. EICHEL ◽  
HANS KUNGL
Keyword(s):  
Piezoelectric Properties ◽  
Ferroelectric Materials ◽  
Lead Free ◽  
Current Status ◽  
Environmental Concerns ◽  
Scale Analysis ◽  
Future Perspectives ◽  
Micro Structure ◽  
Research Activities ◽  
Recent Developments

Lead-free ferroelectric materials are currently subject to extensive research activities owing to environmental concerns and corresponding legislation which point to substitute lead-based ferroelectric materials. The paper provides an overview on recent research activities and trends in the field of lead-free ferroelectrics. The current work is grouped by contributions to atomistic-scale analysis of lead-free materials, structure and phase formation, micro structure and dopant effects on piezoelectric properties. The results and challenges to research in these fields are briefly sketched; so a framework is provided in which the contributions of the present topical issue to the major topics in lead-free ferroelectrics are related. The contributions in this issue are listed in Refs. 63–77. Finally, the current status of research and technology on lead-free materials is summarized.

scholarly journals CURRENT STATUS OF FUNCTIONAL FOODS RESEARCH AND DEVELOPMENT IN INDONESIA: OPPORTUNITIES AND CHALLENGES

2021 ◽  
Vol 32 (1) ◽  
pp. 83-91
Author(s):  
Indah Purwaningsih ◽  
◽  
Ria Hardiyati ◽  
Muhammad Zulhamdani ◽  
Chichi Shintia Laksani ◽  
...  
Keyword(s):  
Research And Development ◽  
Functional Foods ◽  
Technology Development ◽  
Academic Research ◽  
Innovation System ◽  
Health Claims ◽  
Current Status ◽  
Regulation System ◽  
Clinical Test ◽  
Research Activities

The development of functional foods requires extensive research and development (R&D) activities for product development, technology development and commercialization. However, it becomes rather a complex issue in developing countries, including Indonesia. This study briefly discusses the status of functional foods R&D in Indonesia by understanding the opportunities and challenges. Employing scientometrics with bibliometric data from Scopus Database from the early retrievable date to October 29, 2018, the study finds out that R&D on functional foods in Indonesia indicates a substantially increasing trend in the last decade. The research activities are mostly conducted by public research institutes (PRIs) and universities in the area of identification of bioactive compounds and their effects on health. They explore the abundant potentially indigenous biodiversity from Indonesia, both land and marine resources. Nonetheless, the R&D activities are still lacking of network and integration between the subject areas. Underdeveloped infrastructure, limited human resources and financial support, costly preparation for the clinical test to satisfy health claims regulation and the gap between academic research and industry have been key issues in Indonesian functional foods R&D. By using innovation system perspectives, this study suggests that public R&D on functional foods demands active collaboration between PRIs, universities and industry as well as the supportive regulation system from policymakers to enhance the development of functional foods in the future.

Current Status of Horonobe URL Project in Construction Phase

2010 ◽  
Author(s):  
Hironobu Abe ◽  
Koichiro Hatanaka
Keyword(s):  
Phase I ◽  
Phase Ii ◽  
Current Status ◽  
Fiscal Year ◽  
Geological Environment ◽  
Tunnel Wall ◽  
Energy Agency ◽  
Research Activities ◽  
Disturbed Zone ◽  
Phase Phase

The Horonobe URL project has been pursued by JAEA (Japan Atomic Energy Agency) to establish and demonstrate site characterization methodologies, engineering technologies, and safety assessment methodologies for HLW geological disposal in relevant geological environment with sedimentary rock and saline groundwater distributing in the Horonobe area, Hokkaido, Japan. In the Horonobe URL project, surface-based investigation phase (Phase I) has already completed in the fiscal year 2005, and then construction phase (Phase II) has initiated in the same year. Currently, construction of the underground facilities such as shafts/galleries which were designed in Phase I, investigations of the geological environment in the excavated shafts/galleries and confirmation of applicability of engineering technologies have been alternately carried out as Phase II activities of the project. During the construction so far, monitoring for the construction safety such as convergence measurements, tunnel wall observation, sampling of groundwater and rock, investigations for evaluating excavation damaged/disturbed zone (EDZ/EdZ) along shafts/galleries were carried out. In addition, a shotcrete construction test and a grout injection test by using low alkaline cement material were carried in the horizontal galleries. In this paper, status of the URL construction and research activities mentioned above are outlined as the current achievement of the Horonobe URL project.

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