1. Wayne R. Meier Lawrence Livermore National Lab Per Peterson UC Berkeley Updated Heavy Ion Driver Parameters for Snowmass Point Design ARIES Meeting July 1-2, 2002 General Atomics, San Diego * This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under Contract No. W-7405-Eng-48.

2. Driver parameters for 6.4 MJ point design Beam energy: foot pulse = 2.9 MJ, main pulse = 3.5 MJ, total = 6.4 MJ Number of beams: 56 foot, 56 main, 112 total Ion = Xe +1 (A = 131) Final ion energy: foot = 2.1 GeV, main = 2.5 GeV Initial/final pulse duration in accelerator: 30  s / 200 ns (all beams) Final pulse duration on target: foot = 30 ns, main = 8 ns Initial current/beam: 0.83 A (both) Final current/beam at final focus: foot = 0.83 kA, main = 3.1 kA Accelerator length: ~ 2 km Drift compression and redirection length: 350 m Driver efficiency = 45% Driver capital cost: direct ~$1B, total ~$2B

3. Multiple Ion Source/ Injectors Multiple-Beam Acceleration Drift compression Bending Final focusing Chamber transport Target Input 6.4 MJ Yield 400 MJ 1.6 MeV 0.83 A/beam 30  s 112 beams 2.1 - 2.5 GeV Xe +1 123 A/beam 200 ns Foot = 2.1 GeV, 30 ns, 0.83 kA/beam Main = 2.5 GeV, 8 ns, 3.1 kA/beam Relative beam bunch length at end of: injection acceleration drift compression Common Induction Cores 24,000 tons 2 km 350 m Reference 112-beam, 6.4 MJ Driver

4. A focus half angle of 15 mrad gives about minimum spot size for both foot and main pulse beams FootMain 2.3 mm 2.0 mm

5. A 9×9, 112-beam array has been designed Beam-line parameters: –beam half angle: 15 mrad –cylindrical jet standoff from beam cone to permit gravity deflection and pointing errors: 5-mm –cylindrical jets have diameter of 90% of the liquid envelope diameter to allow for surface roughness Array parameters: –56 main pulse beams, 56 foot pulse beams –spacing between beam array rows: 6° –main pulse »maximum beam angle: 24.7° »minimum beam angle: 18.0 –foot pulse »maximum beam angle: 19.0° »minimum beam angle: 8.5° UC Berkeley

6. A 112-beam configuration (56 foot-pulse / 56 main pulse) UC Berkeley Chamber Beam Map 26 Foot / 26 Main

7. Cylindrical jet configuration for 9x9 array UC Berkeley These jets are orthogonal to inner rows of jets

8. 9x9 array showing beam tubes and magnets at 6 meters Detailed mechanical design of the beam tubes is needed to determine where steel, coolant, voids, and other materials will be located to allow injection/ extraction of vortex flow and optimize shielding UC Berkeley

9. The 6.4 MJ, 5.9 Hz point gives near optimum COE COE vs Driver energy COE vs Rep-rate Net power = 1000 MWe

10. HIF VNL is pulling together a self-consistent point design for a power plant Target design accommodates larger final focus array consistent with liquid protection geometry Final focus design configuration meets target spot size requirements Activation, radiation damage, and heating of final focus array are being evaluated Overall systems model have been updated and shows that the design point is near optimal for current assumptions Possibilities to reduce driver cost and COE continue to be part of HIV VNL R&D