Title: Exploring Magnetically Confined Burning Plasmas in the Laboratory
1 Exploring Magnetically Confined Burning Plasmas in the Laboratory Yearn to burn Burn to learn Marshall N. Rosenbluth
AAAS Annual Meeting
February 18 2005
2 Roadmap Promise Scientific Benefits and Energy Potential Prognosis Scientific and Technological Readiness Process Approaches to the Study of Burning Plasmas Prospects Technical and Organizational Outlooks Promise Scientific Benefits and Energy Potential 3
Key Science Topics of Burning Plasmas
Self-heating and self-organization
3.5 MeV 14.1 MeV D T 4He (3.5 MeV) n0 (14.1 MeV) 4 Roadmap Promise Scientific Benefits and Energy Potential Prognosis Scientific and Technological Readiness Process Approaches to the Study of Burning Plasmas Prospects Technical and Organizational Outlooks 5 The path to the US decision on Burning Plasmas and participation in ITER negotiations Earlierwork 6 Snowmass identified issues and assessed burning plasma experiments Physics-focus nowIntegration later FIRE IGNITOR Early sci/tech integrationITER BP contributions to ICCs Argue for scientific and technological benefits of approaches Assess benefits of a tokamak BPX to ICC path Identify key scientific technological and path issues Determine assessment criteria Perform uniform assessments of approaches 7 The overwhelming consensus
burning plasmas are opportunities ripe for exploration and discovery
tokamaks are ready to proceed to the burning plasma stage
the commonality of physics and technology would allow other toroidal configurations to benefit from a burning tokamak plasma
8 The Tokamak is Ready for a Burning Plasma Test 9 Roadmap Promise Scientific Benefits and Energy Potential Prognosis Scientific and Technological Readiness Process Approaches to the Study of Burning Plasmas Prospects Technical and Organizational Outlooks 10 Assessment of contributions of the options
IGNITOR FIRE and ITER would enable studies of the physics of burning plasma advance fusion technology and contribute to the development of fusion energy.
The contributions of the three approaches would differ considerably.
11 The path to the US decision on Burning Plasmas and participation in ITER negotiations Earlierwork 12 NRC Burning Plasma Bringing a Star to Earth
The United States should participate in ITER. If an international agreement to build ITER is reached fulfilling the U.S. commitment should be the top priority in a balanced fusion science program.
The United States should pursue an appropriate level of involvement in ITER which at a minimum would guarantee access to all data from ITER the right to propose and carry out experiments and a role in producing the high-technology components of the facility consistent with the size of the U.S. contribution to the program.
13 The path to the US decision on Burning Plasmas and participation in ITER negotiations Earlierwork 14 US decision on joining ITER Negotiations (1/30/03 )
Now is the time to expand our scope and embrace international efforts to realize the promise of fusion energy. Now it is time to take the next step on the way to having fusion deliver electricity to the grid. The President has decided to take that step. Therefore I am pleased to announce today that President Bush has decided that the United States will join the international negotiations on ITER.(Energy Secretary Abraham at PPPL)
15 International Thermonuclear Experimental Reactor (ITER) Mission To Demonstrate the Scientific and TechnologicalFeasibility of Fusion Energy 16 ITER integrates science and long-pulse technology for the study of sustained burning plasmas 17 Central Solenoid Model Coil Radius 3.5 m Height 2.8m Bmax13 T W 640 MJ 0.6 T/sec 18 International Fabrication of the Central Solenoid Model Coil H. Tsuji et al. /Fusion Engineering and Design 55 (2001) 19 Toroidal Field Model Coil Height 4 m Width 3 m Bmax7.8 T Imax 80kA 20 Vacuum Vessel and Shield/Blanket Modules 21 Blanket Module HIP Joining Tech Size 1.6 m x 0.93 m x 0.35 m 22 Remote Maintenance of Blanket 4 t Blanket Sector Attachment Tolerance 0.25 mm 23 Divertor Cassette 24 Remote Maintenance of Divertor Cassette 25 Vacuum Vessel Sector 26 ITER Technology was developed during the EDA RD Activities completed by July 2001. Heat Flux gt15 MW/m2 CFC/W 27 Instrumentation is key to science on ITER 28 Roadmap Promise Scientific Benefits and Energy Potential Prognosis Scientific and Technological Readiness Process Approaches to the Study of Burning Plasmas Prospects Technical and Organizational Outlooks 29 Allocation of responsibilities for in-kind contributions was achieved Steady-state power supplies 30 Site Selection Sequence/Schedule Japan (Rokkasho) Canada (Clarington) 31 Scientific and technological work continues
Despite the lack of site-decision technical work continues
completing RD and design on in-kind contributions
Manufacturing studies and vendor qualification
The International Tokamak Physics Activity is identifying and addressing key scientific questions that relate to the performance of burning plasmas
Supporting the design activity
Leading to more effective research on ITER by
Discovering new integrated scenarios to exploit understanding
Building integrated tools and simulations
Developing a strong work-force
Integrating international topical teams as precursors for ITERs research operations
32 Following the site-decision innovative arrangements will be needed
Procurement systems including in-kind contributions and change management
Resource management with most funds remaining in the parties
Staffing by secondees direct employees of the international organization and contracts
Engaging the worlds industrial base for roles in management fabrication assembly/installation and operations
Engaging the worldwide fusion research community to see ITER as an opportunity
Effective distributed project management the integrates the activities of the parties
33 Conceptual Management Structure 34 The Bottom Line.
Scientific and technological assessments have affirmed
the significance of burning plasma science
the readiness of the tokamak as a vehicle for the study of toroidal magnetically-confined self-heated plasmas.
The world fusion community is striving to start the construction to enable burning plasma research.
The continuing development of organizational arrangements is challenging and may be useful to other areas of science.
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