S-AD-M-005
Chapter 1: System Overview
January 2006—Page 23 of 35
G6868J1
Figure 1.12
Drawing of the TAS and the TC located within.
This view is from the northeast, looking southwest.
Beam transport tubes from the GCC enter the TC
from the west (not shown).
Three smaller gratings, rather than one large grating, were designed to facilitate their manufacture.
The gratings have a vertical pitch of 1740 l/mm and the outboard tiles are individually aligned to the
center tile for tip, tilt, rotation, piston, and shift to a high precision, minimizing wavefront error. The
tiles rest upon a precision
x
,
y
,
z
translation stage for initial alignment. Tiling alignment is accomplished
using an interferometer incorporated into the compressor.
Each compressor has a complete suite of diagnostic instrumentation to characterize pulse duration,
spectrum, wavefront, and beam alignment. These instruments are located in the SPDP table.
1.5.3 Target Chamber and Target Area Structure
The OMEGA EP target chamber is similar in design to the OMEGA target chamber and has
the same 3.3-m diameter. The chamber is located within the target area structure (TAS) located at the
north end of the Laser Bay. A drawing of the TAS and TC is shown in Fig. 1.12. The chamber is the
heart of the experimental system, where targets are irradiated and the various diagnostics are supported.
The diagnostic suite has both fixed and flexible diagnostic platforms. Future fixed diagnostics will
include plasma calorimeters that measure absorbed laser energy, x-ray pinhole cameras that capture
time-integrated images of the target emission, Kirkpatrick–Baez (KB) microscopes, and x-ray streak
and framing cameras that record time-resolved x-ray spectrum images. Flexible accommodations for
experimental diagnostics are provided by ten-inch manipulators (TIM’s). Each provides mechanical,
vacuum, and electrical/control support and positioning for any compatible instrument that needs to be
positioned near the center of the target chamber.
Summary of Contents for Volume VII-System Description
Page 38: ......
