Page 430 - High Power Laser Handbook

3v Laser The National Ignition Facility Laser 399
Parameter 96 Beam PCC Achieved Values Shot Number
Pulse energy ≥500 kJ 542kJ for 96 beams N081219-002-999
564kJ for 96 beams N081221-003-999
Peak power ≥200 TW 215 TW Peak N081222-001-999
205 TW Average N081221-003-999
over 2 ns
Wavelength O.35 μm O.35 μm Entire campaign
Positioning <100 μm RMS 64 μm RMS N090114-002-999
accuracy
Pulse duration Up to 20 ns Up to 20.9 ns N081222-002-999
Pulse dynamic ≥25:1 >90:1 N081221-003-999
range
Pulse spot ≤600 μm 500 TW in 330 μm N060329-002-999
size (without 530 TW in 600 μm (B318 on PDS)
smoothing)
8
8
Prepulse power <10 W/cm 2 <10 W/cm , Many
2
Measure at PAM
or 1ω main laser
output, analysis
to TCC
Cycle time 8 hours max 5:10, 6:02, Shortest:
between full and 6:12 hours N081218-003-999
system shots between shots N081219-001-999
during campaign

Table 14.8 Comparison of 96-Beam Performance with PCC Requirements

CCD counts
17% contour 4
P2/P0 = 14 ± 2% 3 10
P4/P0 = 1 ± 6%
50
2 10 4
Y (µm) 0 10 4

−50
0
1.05 MJ N091204-001-999
−50 0 50
X (µm)
Figure 14.36 X-ray framing camera image of an imploded 2-mm-diameter gas-
filled capsule. NIF scientists have demonstrated the ability to achieve high
capsule compression while controlling the imploded-configuration symmetry.
398