SLAC Today is available online at:
http://today.slac.stanford.edu
In this issue:
SLAC to Help Build KEK's ATF2
Science Today: A Happy Easter for ILC Ring to Main Linac Team
A Message from President John Hennessy
Electrical Safety Tip: Proper Operation of Circuit Breakers

SLAC Today

Thursday - May 18, 2006

KEK representatives evaluate SLAC's power system demonstration system.

SLAC to Help Build KEK's ATF2

As particle physics becomes more and more of an international endeavor, SLAC researchers and engineers are following suit. SLAC has joined the international effort to build the Accelerator Test Facility 2 (ATF2), located at KEK in Japan, by designing forty-one "high-availability" power systems. These systems increase the proportion of time that the power sources are in functioning condition.

"ATF2 replicates the final focus accelerator envisioned for the ILC," said Antonio de Lira, Controls and Power Electronics Department (CPE) Group Leader. "This is an opportunity to help build ATF2 and advance R&D for the International Linear Collider."  Read more...

(Daily Column - Science Today)

A Happy Easter for ILC Ring to Main Linac Team

(Graph) Twiss functions of the completed RTML design.

The team designing the International Linear Collider's Ring to Main Linac (RTML) transfer line was the first of the ILC's "area systems" groups to submit complete specifications for all their beamline magnets. This milestone, achieved the week before Easter, was recognized with a prize: chocolate candies for all members of the team!

In order to meet this momentous goal, the RTML team first had to complete the lattice design for the system, which is one of the most complex and heterogeneous areas in the ILC. With the complete lattice it was possible to count the number of magnets of each type (bend, quadrupole, corrector, etc., for a total of about 1,200) and tabulate them in an Excel spreadsheet. Finally, a number of detailed specifications on each magnet had to be recorded, such as time structure (DC, pulsed or superfast), power supply arrangement (powered by its own current supply or powered in series with other magnets), alignment tolerances and many more.

Congratulations to the ILC RTML design team: Peter Schmid (DESY), Sergei Seletskiy (SLAC), Jeff Smith (Cornell), Peter Tenenbaum (SLAC) and Mark Woodley (SLAC).

SLAC Wellness Survey

The Wellness Office's webpage currently features a survey to determine whether a Walking for Fitness class should be offered at SLAC this summer. Please take a moment to fill out the survey!

A Safety Message from President Hennessy

(Image - Hennessy) Dear Stanford Community Member:

Most of you have heard that two Stanford students have been the victims of armed robberies in the last week. This is a very serious situation and I wanted to communicate directly with you to let you know that the safety and security of Stanford community members is of paramount importance to the university and its leaders.

We are working with our chief of police, who has immediately increased the number of personnel on patrol, and with the Office of Student Affairs to ensure that students are both aware of the two robberies and taking precautions to ensure their own safety. Historically, Stanford has been a very safe community, but we also recognize that the university is part of the larger world, and we remind students and staff to walk and travel with friends, use well-lighted routes at night, carry cell phones and, if you feel endangered, call 911.  Read more...

Electrical Safety Tip: Proper Operation of Circuit Breakers

(Image - Electrical Safety) When operating a circuit breaker—even a panel with a no arc flash hazard notice label—a qualified worker should stand to the side of the breaker and turn his or her face away when throwing the switch, if possible. If a breaker trips open under normal use, do not reset the breaker until the cause of the trip has been investigated.

Only qualified workers with the permission of their supervisor (and the area or building manager when needed) and training in electric shock and arc flash hazards are allowed to reset breakers. There is a label on the front of every panel with its hazard rating and a list of Personal Protective Equipment (PPE) required for resetting a breaker.

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