SLAC Linac Preparations for FACET Page: 3 of 3
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CLEARING THE TUNNEL FOR FACET
In the past three months, essentially all the accelerator
components from the BAS-II dump near the end of Sector
19 to the new shielding wall at the end of Sector 20 have
been dismantled to make room for the anticipated new
FACET transport magnets, beam diagnostics, and other
instrumentation. The 10-foot-long copper accelerator
structures were carefully stored for future use. Cooling
water pipes were cut back and capped or bypassed,
rectangular RF waveguide and vacuum manifold
hardware was removed, and a large number of cables and
conduits were removed or rerouted. Figures 5 and 6 are
photographs taken in the tunnel before and after the
accelerator components were removed. The FACET
installation project is expected to begin in September
Figure 6: Sector 20 after the accelerator systems were
removed. The tunnel is ready for the FACET magnets to
A project is underway at SLAC to construct a facility
for conducting experiments that require high-energy, low
emittance, longitudinally compressed bunches of
electrons or positrons. The FACET and LCLS sections of
the linac tunnel have been separated by a massive
shielding wall, and a stairway and other modifications
have been added to facilitate easy access and emergency
egress. The accelerator components have been
dismantled and carefully removed from the area where
the new FACET systems will soon be installed. The first
electron beam to the FACET area is expected in 2011.
Figure 5: Sector 20 before the accelerator systems were
removed. The linac is visible above the much larger
alignment light pipe.
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Erickson, R.; Bentson, L.; Kharakh, D.; Owens, A.; Schuh, P.; Seeman, J. et al. SLAC Linac Preparations for FACET, article, February 7, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc834666/m1/3/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.