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At least 973 records · Page 54
All sourcesNASA NTRSDOE OSTI
DOE OSTI2015

The GREET Model Expansion for Well-to-Wheels Analysis of Heavy-Duty Vehicles

Heavy-duty vehicles (HDVs) account for a significant portion of the U.S. transportation sector’s fuel consumption, greenhouse gas (GHG) emissions, and air pollutant emissions. In our most recent efforts, we expanded the Greenhouse gases, Regulated Emissions, and Energy use in Transportation (GREETTM) model to include life-cycle analysis of HDVs. In particular, the GREET expansion includes the fuel consumption, GHG emissions, and air pollutant emissions of a variety of conventional (i.e., diesel and/or gasoline) HDV types, including Class 8b combination long-haul freight trucks, Class 8b combination short-haul freight trucks, Class 8b dump trucks, Class 8a refuse trucks, Class 8a transit buses, Class 8a intercity buses, Class 6 school buses, Class 6 single-unit delivery trucks, Class 4 single-unit delivery trucks, and Class 2b heavy-duty pickup trucks and vans. These vehicle types were selected to represent the diversity in the U.S. HDV market, and specific weight classes and body types were chosen on the basis of their fuel consumption using the 2002 Vehicle Inventory and Use Survey (VIUS) database. VIUS was also used to estimate the fuel consumption and payload carried for most of the HDV types. In addition, fuel economy projections from the U.S. Energy Information Administration, transit databases, and the literature were examined. The U.S. Environmental Protection Agency’s latest Motor Vehicle Emission Simulator was employed to generate tailpipe air pollutant emissions of diesel and gasoline HDV types.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2015

Integrated research training program of excellence in radiochemistry

The overall goal of this “Integrated Research Training Program of Excellence in Radiochemistry” is to provide a rich and deep research experience in state-of-the-art radiochemistry and in the fundamentals of radioisotopic labeling and tracer methodology to develop researchers who are capable of meeting the challenges of designing and preparing radiotracers of broad applicability for monitoring and imaging diverse biological systems and environmental processes. This program was based in the Departments of Radiology and Radiation Oncology at Washington University Medical School and the Department of Chemistry at the University of Illinois at Urbana Champaign, and it was initially directed by Professor Michael J. Welch as Principal Investigator. After his passing in 2012, the program was led by Professor Suzanne E. Lapi. Programmatic content and participant progress was overseen by an Internal Advisory Committee of senior investigators consisting of the PIs, Professor Mach from the Department of Radiology at Washington University and Professor John A. Katzenellenbogen of the Department of Chemistry at the University of Illinois. A small External Advisory Committee to give overall program guidance was also constituted of experts in radiolabeled compounds and in their applications in environmental and plant science.

18F↗
DOE OSTI2014

Better Buildings Alliance: 2013 Annual Report

We are pleased to share with you a copy of the 2013 Annual Report. Inside, you’ll find significant program accomplishments, profiles on highlighted members, and plans for 2014. With your contributions, support, and leadership over the past 12 months, the program has reached significant milestones, including: Growing membership to over 200 members, to represent over 10 billion square feet of U.S. commercial building space and one-seventh of the market; Increasing participation in the 15 Solutions Teams by 75%; Developing 3 new high-efficiency technology specifications that if widely implemented, could save more than $5 billion in energy costs per year; Launching the Advanced RTU Campaign and Wireless Meter Challenge, and surpassing 100 million sq. ft. in the Lighting Energy Efficiency in Parking (LEEP) Campaign; Welcoming partners in new sectors, including K-12 schools and local governments; The program is a critical element of the Better Buildings Initiative, driving 20% energy savings in the building sector by 2020 through innovation, new technologies, and profiling leadership. Thank you for your ongoing participation, we are looking forward to working with you in the new year on your energy saving targets and advancing technical and market practices that promote energy savings at your organization.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2015

Economic Impact of Pacific Northwest National Laboratory on the State of Washington in Fiscal Year 2014

PNNL is a large economic entity with a total of 4,308 employees, $939 million (M) in total funding, and $1.02 billion (B) in total spending during FY 2014. The number of employees that live in Washington State is 4,026 or 93 percent of the Laboratory staff. he Laboratory directly and indirectly supported $1.45 billion in economic output, 6,832 jobs, and $517 million in Washington State wage income from current operations. The state also gained more than $1.19 billion in output, over 6,200 jobs, and $444 million in income through closely related economic activities such as visitors, health care spending, spending by resident retirees, and spinoff companies. PNNL affects Washington’s economy through commonly recognized economic channels, including spending on payrolls and other goods and services that support Laboratory operations. Less commonly recognized channels also have their own impacts and include company-supported spending on health care for its staff members and retirees, spending of its resident retirees, Laboratory visitor spending, and the economic activities in a growing constellation of “spinoff” companies founded on PNNL research, technology, and managerial expertise. PNNL also has a significant impact on science and technology education and community not-for-profit organizations. PNNL is an active participant in the future scientific enterprise in Washington with the state’s K-12 schools, colleges, and universities. The Laboratory sends staff members to the classroom and brings hundreds of students to the PNNL campus to help train the next generation of scientists, engineers, mathematicians, and technicians. This investment in human capital, though difficult to measure in terms of current dollars of economic output, is among the important lasting legacies of the Laboratory. Finally, PNNL contributes to the local community with millions of dollars’ worth of cash and in-kind corporate and staff contributions, all of which strengthen the economy. The purpose of this report is to quantify these effects, providing detailed information on PNNL’s revenues and expenditures, as well as the impacts of its activities on the rest of the Washington State economy.

99 GENERAL AND MISCELLANEOUS↗
DOE OSTI2015

Use of Low-Temperature Geothermal Energy for Desalination in the Western United States

This joint project between the National Renewable Energy Laboratory and the Colorado School of Mines has examined the potential of using low-temperature geothermal resources for desalination. The temperature range in question is not well suited for electricity generation, but can be used for direct heating. Accordingly, the best integration approaches use thermal desalination technologies such as multi-effect distillation (MED) or membrane distillation (MD), rather than electric-driven technologies such as reverse osmosis (RO). The examination of different desalination technologies led to the selection of MD for pairing with geothermal energy. MD operates at near-ambient pressure and temperatures less than 100°C with hydrophobic membranes. The technology is modular like RO, but the equipment costs are lower. The thermal energy demands of MD are higher than MED, but this is offset by an ability to run at lower temperatures and a low capital cost. Consequently, a geothermal-MD system could offer a low capital cost and, if paired with low-cost geothermal energy, a low operating cost. The target product water cost is $1.0 to $1.5 per cubic meter depending on system capacity and the cost of thermal energy.

15 GEOTHERMAL ENERGY↗
DOE OSTI2015

Improved Large Aperture Collector Manufacturing

The parabolic trough is the most established CSP technology and carries a long history of design experimentation dating back to the 1970’s. This has led to relatively standardized collector architectures, a maturing global supply chain, and a fairly uniform cost reduction strategy. Abengoa has deployed more than 1,500MWe of CSP troughs across several countries and has built and tested full-scale prototypes of many R&D concepts. The latest trough R&D efforts involved efforts to internalize non-CSP industry experience including a preliminary DFMA principles review done with Boothroyd Dewhurst, a construction literature review by the Arizona State University School of Construction Management, and two more focused manufacturing engineering subcontracts done by Ricardo Inc. and the nonprofit Edison Welding Institute. The first two studies highlighted strong opportunities in lowering part count, standardizing components and fasteners, developing modular designs to support prefabrication and automation, and devising simple, error-proof manual assembly methods. These principles have delivered major new cost savings in otherwise “mature” products in analogous industries like automotive, truck trailer manufacture, metal building fabrication, and shipbuilding. For this reason, they were core in the design development of the SpaceTube® collector, and arguably key to its early successes. The latter two studies were applied specifically to the first-generation SpaceTube® design and were important in setting the direction of the present SolarMat project. These studies developed a methodology to analyze the costs of manufacture and assembly, and identify new tooling concepts for more efficient manufacture. Among the main opportunities identified in these studies were the automated mirror arm manufacturing concept and the need for a less infrastructure-intensive assembly line, both of which now form central pillars of the SolarMat project strategy. These new designs will be supported by new technology in the area of quality control inspection, in which state of the art photogrammetry and laser CMM inspection methods will be used to qualify parts and assemblies, and in which the recently-developed Absorber Reflection Method will enable in-line quality control inspection of modules produced by the new high-rate production line.

14 SOLAR ENERGY↗
DOE OSTI2015

U.S. Department of Energy Portsmouth Annual Site Environmental Report (ASER) for 2012. Student Summary

The report that follows is a summary of the U.S. Department of Energy Portsmouth Annual Site Environmental Report for 2012 (ASER), regarding PORTS located near Piketon, Ohio. The summary has been compiled by the 2015 WHS Environmental Science class, made up of juniors and seniors at WHS during the 2014-2015 school year. Even with most of the class having lived in this region for their entire lives, it became apparent how little of the workings of the plant were known by the members of the class. In the process of putting this summary together, we were able to gain a better understanding of the history, function, and possible future of the site. The presentations provided by Ohio University, Fluor-B&W Portsmouth LLC (FBP), U.S. DOE, and Rio Grande University were greatly appreciated and provided invaluable understanding of the materials which we were asked to summarize. Not only did we learn from the presentations, but we greatly enjoyed the opportunities to participate in the field studies that gave us a glimpse into what is being done at the plant site to ensure the environmental safety of people and wildlife of this region. Our goal from this summary has been to make the information concerning the monitoring and cleanup of the PORTS facility better understood by the people who it most affects. We hope that this summary makes the information useful to you and that you can gain a better understanding of the cleanup processes that are going on around the site to ensure your safety. Though it has been hard work, we appreciate the opportunity that we have been presented with to learn and share with the people of our community.

54 ENVIRONMENTAL SCIENCES↗
DOE OSTI2016

ISTI Overview

The Information Science & Technology Institute (ISTI) enables the execution of LANL’s institutional IS&T pillar through revitalization of technical IS&T areas, recruiting, and retention of IS&T staff. ISTI manages, organizes, and/or provides funding for (1) summer schools, (2) university collaborations, (3) workshops, (4) the IS&T seminar series, (5) program development, and (6) the visualization collaboratory at LARP all with a focus on IS&T.

97 MATHEMATICS AND COMPUTING↗
DOE OSTI2016

The ACS-NUCL Division 50th Anniversary: Introduction

The ACS Division of Nuclear Chemistry and Technology was initiated in 1955 as a subdivision of the Division of Industrial and Engineering Chemistry. Probationary divisional status was lifted in 1965. The Division’s first symposium was held in Denver in 1964 and it is fitting that we kicked-off the 50th Anniversary in Denver in the spring of 2015. Listed as a small ACS Division with only about 1,000 members, NUCL’s impact over the past fifty years has been remarkable. National ACS meetings have had many symposia sponsored or cosponsored by NUCL that included Nobel Laureates, U.S. Senators, other high-ranking officials and many students as speakers. The range of subjects has been exceptional as are the various prestigious awards established by the Division. Of major impact has been the past 30 years of the NUCL Nuclear Chemistry Summer Schools to help fill the void of qualified nuclear scientists and technicians. In celebrating the 50th Anniversary we honor the past, celebrate the present and shape the future of the Division and nuclear science and technology. To celebrate this auspicious occasion a commemorative lapel pin has been designed for distribution to NUCL Division members.

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEA↗
DOE OSTI2016

Surviving Scientific Academia . . . and Beyond

It's been 16 years since I first took a physics class at Weber State University. Since them, I've survived graduate school in Nuclear Engineering, and a postdoc appointment doing nuclear nonproliferation. Now I'm a Technical Staff Member at Los Alamos National Laboratory working with nuclear data, the physics behind the numerical simulations of nuclear reactors and nuclear weapons. Along the way, I've learned a few things. First, scientific computing is everywhere in science. If you are not writing codes, you will be analyzing their output, and generally there will be more output than a human can correctly and accurately interpret in a timely manner. Second, a career in science or engineering can be very rewarding with opportunities to collaborate with and generate friendships with very bright people from all over the world.

97 MATHEMATICS AND COMPUTING↗
DOE OSTI2016

PRIMA-X Final Report

The PRIMA-X (Performance Retargeting of Instrumentation, Measurement, and Analysis Technologies for Exascale Computing) project is the successor of the DOE PRIMA (Performance Refactoring of Instrumentation, Measurement, and Analysis Technologies for Petascale Computing) project, which addressed the challenge of creating a core measurement infrastructure that would serve as a common platform for both integrating leading parallel performance systems (notably TAU and Scalasca) and developing next-generation scalable performance tools. The PRIMA-X project shifts the focus away from refactorization of robust performance tools towards a re-targeting of the parallel performance measurement and analysis architecture for extreme scales. The massive concurrency, asynchronous execution dynamics, hardware heterogeneity, and multi-objective prerequisites (performance, power, resilience) that identify exascale systems introduce fundamental constraints on the ability to carry forward existing performance methodologies. In particular, there must be a deemphasis of per-thread observation techniques to significantly reduce the otherwise unsustainable flood of redundant performance data. Instead, it will be necessary to assimilate multi-level resource observations into macroscopic performance views, from which resilient performance metrics can be attributed to the computational features of the application. This requires a scalable framework for node-level and system-wide monitoring and runtime analyses of dynamic performance information. Also, the interest in optimizing parallelism parameters with respect to performance and energy drives the integration of tool capabilities in the exascale environment further. Initially, PRIMA-X was a collaborative project between the University of Oregon (lead institution) and the German Research School for Simulation Sciences (GRS). Because Prof. Wolf, the PI at GRS, accepted a position as full professor at Technische Universität Darmstadt (TU Darmstadt) starting February 1st, 2015, the project ended at GRS on January 31st, 2015. This report reflects the work accomplished at GRS until then. The work of GRS is expected to be continued at TU Darmstadt. The first main accomplishment of GRS is the design of different thread-level aggregation techniques. We created a prototype capable of aggregating the thread-level information in performance profiles using these techniques. The next step will be the integration of the most promising techniques into the Score-P measurement system and their evaluation. The second main accomplishment is a substantial increase of Score-P’s scalability, achieved by improving the design of the system-tree representation in Score-P’s profile format. We developed a new representation and a distributed algorithm to create the scalable system tree representation. Finally, we developed a lightweight approach to MPI wait-state profiling. Former algorithms either needed piggy-backing, which can cause significant runtime overhead, or tracing, which comes with its own set of scaling challenges. Our approach works with local data only and, thus, is scalable and has very little overhead.

97 MATHEMATICS AND COMPUTING↗
DOE OSTI2016

Linking AS, SE, V, and MN Behavior to Natural Biostimulated Uranium Cycling

The project “Linking As, Se, V, and Mn behavior to Natural and Biostimulated Uranium Cycling” successfully investigated Arsenic cycling the Rifle Colorado IFRC. This project trained undergraduate and graduate students at the Colorado School of Mines, Vassar College, and Barnard College. This resulted in both undergraduate theses and a PhD thesis and multiple publications. The science was highly successful and we were able to test the main hypotheses. We have shown that (H1) under reducing conditions that promote uranium immobilization arsenic is readily mobilized, that (H2) thioarsenic species are abundant during this mobilization, and (H3) we have examined arsenic mobilization for site sediment. At the Rifle IFRC Acetate was added during experiments to immobilize Uranium. These experiments successfully immobilized uranium but unfortunately would mobilize arsenic. We developed robust sampling and analysis methods for thioarsenic species. We showed that the mobilization occurred under sulfate reducing conditions and the majority of the arsenic was in the form of thioarsenic species. Previous studies had predicted the presence of thioarsenic species but this study used robust field and laboratory methods to quantitatively determine the presence of thioarsenic species. During stimulation in wells with high arsenic the primary species were trithioarsenate and dithioarsenate. In wells with low levels of arsenic release thioarsenates were absent or minor components. Fortunately after the injection of acetate ended the aquifer would become less reducing and the arsenic concentrations would decrease to pre-injection levels. In aquifers where organic carbon is being added as a remedial method or as a contaminant the transient mobility of arsenic during sulfidogenesis should be considered especially in sulfate rich aquifers as this could impact downgradient water quality.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2016

Maturation and Hardening of the Stabilized Radiometer Platforms (STRAPS) Field Campaign Report

Measurements of solar and infrared irradiance by instruments rigidly mounted to an aircraft have historically been plagued by the introduction of offsets and fluctuations into the data that are solely due to the pitch and roll movements of the aircraft. Two STabilized RAdiometer Platforms (STRAPs) were developed for the U.S. Navy in the early to mid-2000s to address this problem. The development was a collaborative effort between the Naval Research Laboratory (NRL), the Naval Postgraduate School Center for Interdisciplinary Remotely Piloted Aircraft Studies (CIRPAS), and the U.S. Department of Energy (DOE) Sandia National Laboratories. The STRAPs were designed and built by L-3 Communications Sonoma EO (formerly the small business Sonoma Design Group).

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
DOE OSTI2016

Manipulation of Samples at Extreme Temperatures for Fast in-situ Synchrotron Measurements

An aerodynamic sample levitation system with laser beam heating was integrated with the APS beamlines 6 ID-D, 11 ID-C and 20 BM-B. The new capability enables in-situ measurements of structure and XANES at extreme temperatures (300-3500 °C) and in conditions that completely avoid contact with container surfaces. In addition to maintaining a high degree of sample purity, the use of aerodynamic levitation enables deep supercooling and greatly enhanced glass formation from a wide variety of melts and liquids. Development and integration of controlled extreme sample environments and new measurement techniques is an important aspect of beamline operations and user support. Processing and solidifying liquids is a critical value-adding step in manufacturing semiconductors, optical materials, metals and in the operation of many energy conversion devices. Understanding structural evolution is of fundamental importance in condensed materials, geology, and biology. The new capability provides unique possibilities for materials research and helps to develop and maintain a competitive materials manufacturing and energy utilization industry. Test samples were used to demonstrate key features of the capability including experiments on hot crystalline materials, liquids at temperatures from about 500 to 3500 °C. The use of controlled atmospheres using redox gas mixtures enabled in-situ changes in the oxidation states of cations in melts. Significant innovations in this work were: (i) Use of redox gas mixtures to adjust the oxidation state of cations in-situ (ii) Operation with a fully enclosed system suitable for work with nuclear fuel materials (iii) Making high quality high energy in-situ x-ray diffraction measurements (iv) Making high quality in-situ XANES measurements (v) Publishing high impact results (vi) Developing independent funding for the research on nuclear materials This SBIR project work led to a commercial instrument product for the niche market of processing and studying materials in extreme conditions. MDI registered the trademark “Instruments for Innovation®” and sells products under this trademark. SBIR is the ideal vehicle for funding developments such as this since the total market size is relatively small meaning that venture investments to develop products cannot typically be obtained. The sale of niche market instruments for work in extreme conditions has been several million dollars over the last decade. The work to develop and build and sell this instrument has created stable high paying jobs in the technology manufacturing sector. Outreach enabled by this research helped with PhD thesis research, supported three undergraduate interns and one local high school student. In addition, several scientific articles were published, papers were presented at international conferences, and a workshop was held.

36 MATERIALS SCIENCE↗
DOE OSTI2014

Continuation and Enhancement of the MPOWIR Program

MPOWIR is a community-based program that provides mentoring to physical oceanographers from late graduate school through early careers. The overall goal of MPOWIR is to make mentoring opportunities for junior physical oceanographers universally available and of higher quality by expanding the reach of mentoring opportunities beyond individual home institutions. The aim is to reduce the barriers to career development for all junior scientists in the field, with a particular focus on improving the retention of junior women. Over the past five years MPOWIR has expanded significantly. This funding cycle saw the development and enhancement of MPOWIR’s programs and outreach opportunities. MPOWIR’s main programmatic offerings are: mentor groups, a biannual conference, a website and blog, and town hall meetings at national events. Since 2009, MPOWIR has hosted 15 mentor groups, three Pattullo conferences, and created a website that has attracted over 50,000 visitors. MPOWIR’s mentoring groups and Pattullo conferences have reached more than 130 unique participants. Mentor Groups Mentor groups were established in the fall of 2008, and continue to gain momentum after 5 years. Since 2009, 11 groups have formed, with participants mainly, but not exclusively, drawn from Pattullo attendees. To gauge the impact of mentor groups, participants are surveyed approximately annually. Based on an extensive 2011 survey, 100% of mentoring group participants reported that they made progress on their stated scientific, professional, and personal goals. As part of these surveys, participants are asked what they value about their mentoring group, what the benefit of the mentoring group is to their current position, and they are asked questions about the logistics and setup of the groups. Based on the survey conducted in 2012, all participants rated participation in these groups a valuable experience, with particular value placed on feedback on professional development (100% Excellent to Good) and feedback on personal matters (92% Excellent to Good). Pattullo Conferences The centerpiece of the MPOWIR program is the Pattullo Conference, named for June Pattullo, the first woman to receive a Ph.D. in physical oceanography. At each event, the agenda includes research talks, professional development sessions, small group activities, and a question-and-answer session about early-career and retention issues posed by junior scientists to senior researchers. Pattullo Conference participants are surveyed after each conference about their experience. This survey asks participants to rate their opinion on specific topics and invites comments. Combining results from three conferences, 99% of junior participants would recommend the conference to another junior scientist. Of the junior participants, 92% rated the conference as “extremely valuable” overall, with a particular value placed on networking and professional development opportunities. Overall Impact To gain a better perspective on the success of MPOWIR to date, early participants were surveyed in 2013 about their current position, and the impact of MPOWIR on their career path. Individuals were asked to rank the extent to which MPOWIR had impacted various aspects of their professional growth. These aspects included efforts to obtain their current position; exposure to professional development skills; broadening of their professional network; mentoring on work and family balance; performance in current position; and raising awareness of mentoring in career development. Participants overwhelming indicated that MPOWIR had positively impacted all of these aspects. In particular, 95% of respondents expressed that MPOWIR exposed them to useful professional development skills “to a great extent” and 89% consider MPOWIR to have positively impacted their professional network “to a great extent”. Of those surveyed, the majority of participants were 2 years from their Ph.D. at the time of initial involvement. Their current job positions are well distributed over all post-Ph.D. categories: the greatest percentages of positions held are at research institutions (non-academic) or government agencies (29.3%), followed closely by non-faculty research positions at universities (27.6%) and faculty at research universities (22.4%). The remaining positions held (4-year college faculty, profit or not-for-profit company, policy, and graduate students) collectively total 19%. These initial indications point toward mentoring, as offered by MPOWIR, as an effective means for improving retention of women in physical oceanography.

58 GEOSCIENCES↗
DOE OSTI2016

Final Technical Report: Renewable Energy Feasibility Study and Resources Assessment

In March 2011, the U.S. Department of Energy (DOE) awarded White Pine County, Nevada, a grant to assess the feasibility of renewable resource-related economic development activities in the area. The grant project included a public outreach and training component and was to include a demonstration project; however, the demonstration project was not completed due to lack of identification of an entity willing to locate a project in White Pine County. White Pine County completed the assessment of renewable resources and a feasibility study on the potential for a renewable energy-focused economic sector within the County. The feasibility study concluded "all resources studied were present and in sufficient quantity and quality to warrant consideration for development" and there were varying degrees of potential economic impact based on the resource type and project size. The feasibility study and its components were to be used as tools to attract potential developers and other business ventures to the local market. White Pine County also marketed the County’s resources to the renewable energy business community in an effort to develop contracts for demonstration projects. The County also worked to develop partnerships with local educational institutions, including the White Pine County School District, conducted outreach and training for the local community.

09 BIOMASS FUELS↗
DOE OSTI2016

Physics and Novel Schemes of Laser Radiation Pressure Acceleration for Quasi-monoenergetic Proton Generation

The main objective of our work is to provide theoretical basis and modeling support for the design and experimental setup of compact laser proton accelerator to produce high quality proton beams tunable with energy from 50 to 250 MeV using short pulse sub-petawatt laser. We performed theoretical and computational studies of energy scaling and Raleigh--Taylor instability development in laser radiation pressure acceleration (RPA) and developed novel RPA-based schemes to remedy/suppress instabilities for high-quality quasimonoenergetic proton beam generation as we proposed. During the project period, we published nine peer-reviewed journal papers and made twenty conference presentations including six invited talks on our work. The project supported one graduate student who received his PhD degree in physics in 2013 and supported two post-doctoral associates. We also mentored three high school students and one undergraduate student of physics major by inspiring their interests and having them involved in the project.

43 PARTICLE ACCELERATORS↗