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In this issue:
LHC Circulates Two Simultaneous Beams
SAFE '09: SLAC and Contractors—Success through Sharing Safety Cultures
Raising the LCLS Office Building
Bechtol and Alexander Take the Lead in 38th Annual SLAC Run and Walk
No Colloquium Today

SLAC Today

Monday - November 23, 2009

LHC Circulates Two Simultaneous Beams

Celebration on Friday in the LHC Central Control Room at CERN after operators established a circulating clockwise beam. (Photo: CERN.)

CERN's Director for Accelerators Steve Myers announced today that for the first time two beams are circulating simultaneously in the LHC. The announcement was made at a press conference held at the laboratory. The first individual circulating beams of 2009 were successfully established on Friday, November 20.

The next steps will be a careful, systematic testing of the accelerator.

"We will systematically go through all the measurements, put all the systems through their tests, and when we're sure everything's safe, we will increase the beam intensity," explained Myers. "During some shifts we will try to accelerate beam to the maximum energy for this year—1200 GeV per beam. Then we will decide about collisions. Two possibilities are to collide at the 450 GeV injection energy or at 1200 GeV per beam. That is our program until just before Christmas." Over the next year, the energy will be ramped to 3.5 TeV (3500 GeV) per beam, and then possibly to a maximum of 5 TeV.

"With 3.5 TeV per beam we will open new windows to new physics," noted CERN Director-General Rolf Heuer.

Fabiola Gianotti, spokesperson of the ATLAS experiment, observed, "This is at the same time the end of twenty years of effort by the international scientific community to build a machine and detector of unprecedented complexity and technological challenges, and the beginning of a fantastic era of physics exploration and discovery."  

This story first appeared in Symmetry Breaking...

Read more about the LHC startup in The Times Online and BBC News. See also the BBC Guide to the Large Hadron Collider.

SAFE '09: SLAC and Contractors—Success through Sharing Safety Cultures

From left: Rudolph and Sletten Jobsite Safety Coordinator Larry Fabbro and Project Superintendent John Bailey, SLAC Field Construction Manager Raimond Cuadrado, SLAC B901 Project Manager Lori Plummer and SLAC Senior Safety Engineer Don Dains. (Photo by Brad Plummer.)

A good integrated safety program is always improving. As new projects and new challenges arise, the safety program must grow to meet them. When general contractors Rudolph and Sletten came to SLAC to work on two construction sites for the Linac Coherent Light Source, SLAC team members were challenged to combine two cultures of safety into one effective plan. So far, Rudolph and Sletten and the SLAC team members who work with them have celebrated 100 days of incident-free work on construction sites for three hutches for the far experimental hall, as well as the LCLS office building and its adjoining parking lot. Team members from both groups agree: their success comes down to good work planning, the right attitude and outstanding communication.

Construction projects begin long before steel-toed boots and shovels touch down on dirt. Ernie Gomes, department head for the field safety and building inspection office of the SLAC Environment, Health and Safety Division, sat on the panel to select a construction company for the LCLS projects.

"An important consideration in the choice of Rudolph and Sletten was their understanding of SLAC's values and SLAC's requirements for work planning and control," Gomes said.

SLAC Field Construction Manager Raimond Cuadrado and SLAC B901 Project Manager Lori Plummer made work plans for the project while Rudolph and Sletten searched for a team of skilled subcontractors with safe histories and good attitudes.

"It's really important that all the workers out here have the right attitude and the right approach to safety," said Rudolph and Sletten Senior Project Manager Casey Wend. "It's a team effort. If someone's mind is not in it, we don't let them out here because that can expose someone else to a safety hazard. We're looking out for each other."  Read more...

The first wall went into place just after 9 a.m. Wednesday. (Photo by Lauren Knoche.)

Raising the LCLS Office Building

Last Wednesday and Thursday, in only two working days, construction crews assembled the exterior of what will be the new office building for the Linac Coherent Light Source. After receiving final safety instructions Wednesday morning, workers were cleared to begin erecting 22 two-story concrete panels that make up the exterior walls of the building.  Read more and see more photos...

Bechtol and Alexander Take the Lead in 38th Annual SLAC Run and Walk

Runners take off from the starting line for Thursday's SLAC Run & Walk. (Photo by Lauren Knoche.)

Sixty-eight runners and 23 registered walkers took advantage of the beautiful weather last Thursday to participate in the 38th Annual SLAC Run and Walk along the Klystron Galley. For the second year in a row, Keith Bechtol crossed the finish line first, cruising through the 3.8-mile loop in just 20 minutes and 29 seconds. The top female finisher, Mary Jo Alexander, zipped around the gallery and posted a final time of 28:01. For complete results and winners listings, please check the Run and Walk Web page.

Organizers said they were worried that the number of construction projects along the gallery would force this year's run to be cancelled, but thankfully the race went off without a hitch.

"We were very pleased with the cooperation from everyone," said SLAC employee Ruth McDunn, one of the organizers for the race. "We really appreciate that we could carry on with the event."

Thanks to all the participants, organizers and volunteers who helped make this year's event a success! If you have suggestions for the 2010 event—the 39th Annual Run and Walk—please send an e-mail to Ruth McDunn.

No Colloquium Today

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The SLAC Colloquium series is taking a break this week for the Thanksgiving holiday.

Next Monday, Stanford University Professor of Computer Science and Electrical Engineering Sebastian Thrun will present "Towards Self-Driving Cars."


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