S-AD-M-005
Chapter 1: System Overview
January 2006—Page 2 of 35
G6869J1
+Y
77
22
23
78
–Y
–Z
+Z
37
38
64
63
Beam
1
2
3
4
23° port
37
64
63
38
48° port
22
78
77
23
Figure 1.14
The south elevation view of the OMEGA EP target chamber shows the 23º and 48º entry port locations. The backlighter
OAP inserter/manipulator resides in the large port at the center of the drawing and the sidelighter OAP manipulator is
located at the “–Y” equatorial location.
Each of the main beams has a cw alignment laser (1053 nm) located on the infrared alignment
table (IRAT) that contains an alignment sensor package (ASP). The IRAT tables are located adjacent
to the injection tables, just south of the TSF vacuum vessels. The IRAT beam is propagated through the
beamline via the injection mirror, and a series of crosshairs are used to align the beam using the video
and beam motion control systems. The IRAT beam also enters the GCC, where it traverses either the
upper or lower compressor to the short-pulse diagnostic package (SPDP) table, completing an alignment
handoff with the SPDP ASP.
The SPDP also contains an alignment laser (1053 and 1047 nm) that can be propagated through
either pulse compressor to a crosshair located between the diagnostic beamsplitter (DBS) and the first
tiled-grating assembly, establishing a second pointing reference. Also, the SPDP laser may be directed to
the parabola alignment diagnostic (PAD), located in either target chamber. A series of crosshairs along
the short-pulse beam path aids in the pointing handoffs. The PAD is deployed in one of the TIM’s on
either target chamber and allows for the focusing and wavefront properties of the OMEGA EP laser to
be completely characterized and aligned from within the target chamber. The PAD provides tools to
align the off-axis parabola, calibrate the focal spot diagnostics, and provides wavefront characterization
of the short-pulse transport optics. A schematic diagram of the PAD is shown in Fig. 1.15.
The alignment laser in the PAD propagates down the short-pulse beam path through a series of
crosshairs to the SPDP-ASP, completing the short-pulse alignment.
Summary of Contents for Volume VII-System Description
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