Fusion Energy Sciences
Funding ($K)(dollars in thousands)

FY 2018 Enacted

FY 2019 Enacted

FY 2020 Request

FY 2020 Request vsFY 2019 Enacted

Burning Plasma Science: Foundations
Advanced Tokamak
Spherical Tokamak
Theory & Simulation
GPE/GPP/Infrastructure
Total, Burning Plasma Science: Foundations

121,115
93,55050,00013,000277,665

130,500
96,00050,000
10,204
286,704

88,50067,50044,0001,000
201,000-42,000-28,500-6,000-9,204-85,704

Burning Plasma Science: Long Pulse
Long Pulse: Tokamak
Long Pulse: Stellarators
Materials & Fusion Nuclear ScienceTotal, Burning Plasma Science: Long Pulse

15,00010,06927,17752,246

14,0008,500
38,746
61,2469,000
8,500
32,50050,000-5,000—-6,246-11,246

Discovery Plasma SciencePlasma Science Frontiers
Measurement Innovation
SBIR/STTR & OtherTotal, Discovery Plasma Science
Subtotal, Fusion Energy Sciences

54,0007,000
19,20080,200410,11152,0508,000
24,00084,050432,000

25,0004,000
14,75043,750294,750-27,050-4,000-9,250-40,300-137,250

Construction
20-SC-61 Matter in Extreme Conditions Petawatt Upgrade
14-SC-60 U.S. Contributions to ITER
Total, Construction
Total, Fusion Energy Sciences—122,000
122,000
532,111—132,000
132,000
564,000

1,000
107,000
108,000
402,750+1,000-25,000-24,000-161,250

SBIR/STTR Funding: FY 2018 Enacted: SBIR $11,598,000 and STTR $1,631,000
 FY 2019 Enacted: SBIR $12,992,000 and STTR $1,827,000
 FY 2020 Request: SBIR $8,899,000 and STTR $1,252,000

Science/Fusion Energy Sciences160

FY 2020 Congressional Budget Justification

Fusion Energy Sciences
Explanation of Major Changes ($K)

Burning Plasma Science: Foundations
The Request for DIII-D prioritizes funding to ensure scientific utilization of the significant facility enhancements implemented during theFY 2018 – FY 2019 Long Torus Opening, with 13 weeks of research operation. Funding for the NSTX-U program will support the ongoingrecovery activities and maintain collaborative research at other facilities to support NSTX-U research program priorities. SciDAC continues tomake progress toward whole-device modeling; this subprogram will also explore the potential of transformative approaches to fusion science,such as machine learning and QIS. Enabling R&D will focus attention on high-temperature superconductor development. Funding is providedfor General Plant Projects/General Purpose Equipment (GPP/GPE), to support critical infrastructure improvements and repairs at PPPL, as well
as a study of FES infrastructure needs at ORNL.

(dollars in thousands)
FY 2020 Request vsFY 2019 Enacted-85,704

Burning Plasma Science: Long Pulse
The Request will continue to provide support for high-priority international collaboration activities, both for tokamaks and stellarators.
Materials research and fusion nuclear science research programs are focused on high priorities, such as advanced plasma-facing andstructural materials. The Request supports design and R&D activities for the MPEX MIE project, expected to be baselined in FY 2020, andinitiates long-lead major procurements.

-11,246

Discovery Plasma Science
For General Plasma Science, the Request emphasizes research and operations of intermediate-scale scientific user facilities and participationin the NSF-DOE Partnership. For High Energy Density Laboratory Plasmas, the focus remains on supporting research utilizing the Matter inExtreme Conditions instrument of the LCLS user facility at SLAC, supporting research on medium-scale laser facilities through the newLaserNetUS network, and exploring research opportunities of QIS.

-40,300Construction
FES will initiate a line-item construction project for a significant upgrade to the MEC instrument. The U.S. Contributions to ITER project willcontinue design, fabrication, and delivery of highest-priority First Plasma hardware.

-24,000

Total, Fusion Energy Sciences-161,250

Science/Fusion Energy Sciences161

FY 2020 Congressional Budget Justification