SLAC Projects
The Alignment Engineering Group (AEG) provides alignment and
geodetic services for SLAC. Currently the
Linac Coherent Light Source (LCLS) and the Stanford Positron
Electron Accelerating Ring (SPEAR3) are the main
users of AEG services:
LCLS-II alignment tasks have pushed the state-of-the-art
in terms of highly accurate and precise alignment
techniques and equipment. This free-electron x-ray laser
requires extremely well aligned components-especially
in the Undulator Hall where successful self-amplified
spontaneous emission (SASE) of x-rays requires a
series of precisely aligned undulator magnets and
components. LCLS presents the challenge of aligning the
entire 2 kilometers of new components in narrow tunnels
while also having only limited external tunnel
access for outside survey network control.
FACET is an advanced plasma acceleration facility that will provide high energy density electron and positron
beams focused down to 10x10 um spot size. New and many re-used beam-line components are used in this facility
creating challanges in terms of successful alignment with equipment that may not have been originally designed
for this new facility.
SPEAR3
is the Stanford Synchrotron Radiation Laboratory's (SSRL) third generation synchrotron light source that
has been operating successfully since commissioning in
March 2004. For installation, the AEG was involved in
alignment tasks relating to the concrete floor,
girder pre-alignment, component fiducialization, and installation of the new SPEAR3
ring. Alignment efforts continue in tasks dealing with
component quality control, fiducialization and
installation of new ring components and beamlines. A
Hydrostatic Leveling System (HLS) and length gauge have
been added to study and continuously monitor floor height
for ring and beamline trajectories.
Ongoing Projects
Past Projects
The AEG and its predecessors have
been involved in almost every large
experiment at SLAC. Past experiments
include the Stanford Linear Collider
(SLC), End Station A, the Final
Focus Test Beam (FFTB), the Next
Linear Collider Test Accelerator (NLCTA),
and the Positron Electron Project
(PEP). Below are links to some
archived alignment information on
some significant AEG projects including GLAST
(Gamma Ray Large Area Space
Telescope), SABER (South Arc Beam
Experimental Region), and the next
generation PEP-II project including
the B-Factory.
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