Laser FY07 FaciLitY report
FY07 Laser Facility Report
The OMEGA Facility conducted 1514 target shots for a variety of users in FY07 (see Table 112.V). A total of 27 D2 and 17 DT low-adiabat cryogenic target implosions that required high-contrast pulse shapes were performed. Such pulse shapes are typically characterized by a narrow picket pulse on top of a low-intensity foot pulse, followed by a high-intensity drive pulse (see Fig. 112.39). Substantial strides have been made with low-adiabat-drive pulse shapes and shock timing. Small picket timing and intensity changes have been demonstrated to effect cryogenic target areal-density measurements in agreement with theory. OMEGA Availability and Experimental Effectiveness averages for FY07 were 92.8% and 95.9%, respectively. Highlights of other achievements for FY07 include the following: AnofflineOMEGAfrequency-conversion-crystal(FCC) tuning test bed was developed and activated to tune new OMEGA and OMEGA EP FCC's. This facility supports the ongoing refurbishment of OMEGA crystals and is used to precisely characterize the performance of OMEGAEPFCC's. Morethan25neworsignificantlymodifiedtarget-diagnostic systemswerequalifiedforuseontheOMEGAExperimental
10.0
a~2
Power (TW)
18 kJ 1.0 Pulse as shot Design (width represents tolerances) 0.1 0 1 2 Time (ns) 3 4
T2368aJRC
Figure 112.39 OMEGA single-beam pulse shape from a low-adiabat cryogenic target implosion (shot 47206) using pulse shape HE363001p.
Facility in FY07. These diagnostics supported LLE, LLNL, LANL,AWE,andCEAexperimentsandallweresupported by LLE and the cognizant laboratory. Diagnostic improvements in FY 2007 include integration of the LLNL/OMEGA high-resolution velocimeter (OHRV) diagnostic,
Table 112.V: OMEGA The target shot summary for FY07.
Laboratory LLE LLNL LANL NLUF CEA AWE SNL Total
Planned Number of Target Shots 629 386 158 117 40 20 11 1361
Actual Number of Target Shots 698 422 192 121 40 26 15 1514
IDINIC 174 235 73 0 0 0 15 497
DDINIC 502 0 0 0 0 0 0 502
TotalNIC 676 235 73 0 0 0 15 999
Non-NIC 22 187 119 121 40 26 0 515
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LLE Review, Volume 112
FY07 Laser FaciLitY report upgrade of the active shock breakout (ASBO) diagnostic with a new long-pulse laser system, two ROSS streak cameras, and an off-axis telescope option, integration of an electromagnetic interference (EMI) monitor system to provide baseline and operational data to support short-pulse operations, activation of the magneto inertial fusion energy delivery system (MIFEDS), and qualification of nine x-ray imaging and spectrometer diagnostics. SignificantmodificationsweremadetotheOMEGALaser Facility in FY07 to integrate the OMEGA EP short-pulse beam intotheOMEGAtargetchamber.Thesemodificationsinclude the following: Ten-inchmanipulator#2w...