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SLAC's E158 Makes First Observations of Key Traits in
Weak Force
By
Heather Rock Woods
The E158 experiment at SLAC has made vital
new observations that illuminate the nature of the weak force.
Using extraordinary precision, E158 made the landmark observation that
the strength of the weak force acting on two electrons lessens when the
electrons are far apart. The results have been accepted for publication
in the field’s primary journal, Physical Review Letters.
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New
Milestone for SPEAR3
 By
Francoise Chanut
SPEAR3, SSRL’s recently
upgraded synchrotron radiation source at SLAC, reached 500 milliamps (mA)
for the first time on June 20, and again on June 21.
The milestone was achieved as part
of a series of tests designed to bring SPEAR3 to its full design
performance. SPEAR3 has been running at 100 mA for the past year and a
half but will ultimately operate at 500 mA routinely, generating
brighter X-ray beams that will make new experiments possible.
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