Winter Break Phone Shutdown:
Does Your ALD Know Where You'll Be?
by Shawne Workman
Calling all SLACers: Access to the SLAC site will be limited during the
winter shutdown, December 19 through January 3, due to scheduled maintenance
projects including needed upgrades to the
lab's central phone system on December 26 and 27. If you plan to do any work on-site during the break, please double-check that your
manager (and through him or her, your associate laboratory director or other
division head) knows about it, today.
Over the break, work classified as "red" or "yellow" in SLAC's Work Planning and Control
system will be allowed only for pre-approved projects. Staff who must do
"green" work, such as office work, will be allowed on site
and in their offices without preapproval—with two exceptions. First, several buildings will have major utility interruptions (e.g., no power) during parts of the shutdown,
and access to those buildings will be limited. (Details to
come later this week.) Second, on Saturday and Sunday, December 26 and 27, the phone system will be offline. On those days, only personnel
on pre-approved list will be allowed to enter SLAC, regardless of whether the
planned work is "red," "yellow" or "green." Staff
coming on site will be required to follow a pre-approved emergency communication
protocol, provided by SLAC's emergency management team, as SLAC phones
(650-926-xxxx) will be down and unable to make 911 calls.
SLAC operations, computing and safety staff have gathered a list of
projects scheduled for winter break, through weekly
"Plan of
the Week" meetings, where representatives of each directorate present upcoming
work plans. Today is the deadline for any final additions, changes or designations of "red" or
"yellow" work. The submitted projects will be reviewed this week,
and a list of approved work will be returned to each ALD on Monday, December 14.
Please help by making sure your management knows all work
planned for the break, so that your ALD can communicate any updates to your
Plan of the Week representative today. Please contact Janice Dabney with any
questions.
Watch SLAC Today for additional information about the winter shutdown, including which buildings will be affected by utility shutdowns and the telephone
system project, in the coming days.
ATLAS' Countdown to Collisions
First 900 GeV candidate collision events in the ATLAS detector, November 23, 2009.
by Daisy Yuhas, Symmetry Breaking
ATLAS, at 148 feet long, 82 feet high and 82 feet wide, has the largest volume of any particle detector ever built and is designed to study the products of high-energy proton-proton collisions. Over the past year, ATLAS has been upgrading, repairing, and preparing for Large Hadron
Collider collisions, which began on Monday, November 23. In the four months preceding the first collisions, the ATLAS collaboration's focus shifted from repair and installation to getting all pieces of the complex ATLAS detector operating as one. Here's a look at how ATLAS prepared for collisions.
First, a checkup—4 months until collisions
When the ATLAS detector is closed up and ready for beam, the innermost portions are inaccessible. Therefore, much attention is paid to infrastructure maintenance when the commissioning process begins. ATLAS' Luca Fiorini explained, "The detector is built like a Russian doll. There are things that we cannot repair once the cavern is closed and the magnets are on, though there are still outer levels that we can work on."
Several weeks over the summer were devoted to maintenance work on ATLAS’ 12 sub-detector units and their internal components. Infrastructure maintenance occurred on all three levels of ATLAS: the inner detector, calorimeters, and muon chambers, to be sure that no wires were crossed and all detector channels were calibrated to work together.
Read more in Symmetry Breaking...
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