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Secretary Abraham Sends a Warm The Green Gets a Needed UPqIrade Thank you for an Enjoyable Visit ByShawna -a- Williams SLAC employees on their way Djrect pI,.e.Sr t r in. to and from the Cafeteria OFF:JCIAL IES^-° le-70 \~~~~~ ,^ may notice construction StanfAor ll ~a e,.. 2 Ad work on The Green over the as'^ -- "" next few months. gt4.u;..? Cli 275WdH rna 9402 The goal is to repair leaks in (Ulu2 L-as the irrigation cn system, "which ro cause a bog-type 0>I 1 1 1 effect," said 8 53 1,* I l tl t 1 | St 1 t ** * t ;" ...... U~~~lliili~~~~l""'"""'" ~~~...... B * &-Z Liam Robinson, 0JJ facilities support -CJ- for manager Stan Namura (left) and Vicente Garnica look on as Angel ^O=Ke 'ILA-1M 9-%titthntc^Eb~wrAIMu lnt ur cr-Nr-x Site Engineering Martinez digs an irrigationtrench on The Green. All are WASHINGTON, D.C. 20585 and Maintenance employees of SLAC's landscaping contractor. (SEM). replace the one that died and was cut January 7, 2003 "The area may not be usable for the down. The irrigation repairs would next three months, but it will improve make a new tree's survival more the usability for the next 10 or 20 likely, since cork oak thrives in drier years," Robinson said, adding that Dr. Jonathan Dorfan soil. pedestrians should exercise caution Director on The Green in the next few months. For more information on this project, Stanford Linear Accelerator Center contact: Liam Robinson (SEM), Ext. 2575 Sand Hill Road Planners are also exploring the 2980, [email protected] 0 Menlo Park, California 94025 possibility of planting a cork oak to Dear Jonathan: DOE's Oakland Office to Close by Just a short note to thank you for making my visit to End of 2004, Operations Will Shift the Stanford Linear Accelerator Center (SLAC) successful. I appreciated your kind introduction to the to New Service Center packed all-hands meeting that you and your staff put together. Also, your tour through the SLAC was By Neil Calder extremely interesting and informative. The DOE recently announced that they will close the Oakland National I am impressed with the operation of SLAC and its Nuclear Security Administration contribution to fundamental science and to advances (NNSA) Service Center as part of a in technology that have come from that fundamental reorganization. We sat down with science research. John Muhlestein, head of DOE's Stanford Site Office, for more details Again, I appreciate the hard work of you and your on this upcoming change. staff. I look forward to a return visit. What has changed in the Sincerely, Department of Energy's organization n-V in the Bay Area? 0 0' "On December 17, 2002, DOE's 5I >c NNSA, which oversees the Bay ro 1) Area's Lawrence Livermore National Spencer Abraham n Laboratory and Sandia National 0 Laboratories, implemented a new House Science Committee Staff organizational structure, with John Muhlestein, head of DOE's Office Visits SLAC Albuquerque becoming the main of Science Stanford Site Office. Service Center." usual until transition plans have been "This new structure will streamline established and implementation of operations and oversight while links with the new Service Center has clarifying roles and responsibilities. begun. I will make sure that everyone A direct consequence of this at SLAC is kept fully informed of reorganization is that the DOE's developments."@ Oakland Service Center, which provides our Office of Science Stanford Site Office with a wide range of services, will close by the end of 2004." a/) How will these changes affect 0) 0 0: SLAC? co cd ro "SLAC staff should be reassured that there will be no sudden changes. We -0 0 4-(- still expect to get support from the 0 -C CL Oakland Service Center during the two years of transition. Members of the House Science Committee Staff, Gabe Rozsa, Tina Kaarsberg, Charlie Cook and Chris King, toured SSRL as part of their January 13 visit to SLAC. As an We do not yet know which center example of the kind of biological puzzles that can be examined with SSRL's technical will take over responsibility for capabilities, Linda Brinen (SSRL), far right, shows the visitors the molecular structure SLAC support, but it is business as of the anthrax lethal factor. New Gate House to be Built at MFD & Klystron Departments SLAC Main Gate Specialize in Hydrogen ff 0

0 By Kelley Ranlsey

i) 0 A particularly unique technology Ol used in the Mechanical Fabrication 0 I (MFD) and Klystron and Microwave (KLY) departments is ultra-clean, C E:3 high temperature hydrogen furnace

-c brazing. Hydrogen brazing is an essential .) C assembly technique for joining u components and assemblies for Ir V) critical ultra high vacuum (UHV) systems such as klystrons and This design sketch shows the nrew Gate House for the SLAC Main Gate. accelerator structures. By Shawna Williams Construction should begin on the In hydrogen brazing, a metallurgical new building in late February, Say goodbye to the old guard shack bond is achieved using a filler-metal around the time the current work at SLAC's Main Gate. It will be torn having a lower melting point than on extending utilities to the new down and replaced in the next few the materials being joined. One of the guest house will be completed. The months. primary benefits of brazing is that building should take two to three the mating surfaces form a complete "The guard house that's there now months to complete. A temporary metallurgical joint. When heated in Derrik Soares (MFD) lifts the furnace has a huge leak problem," explained shack will be set up further down the pure hydrogen atmosphere, the heating elemtent off a red hot retort. Rick Yeager, Manager of Labratory the hill from the current one, and filler-metal melts, wets the surfaces Safeguards/Security. "It's old, it's traffic lanes at the main entrance will to be joined, and is drawn between carbon steel, , Glidcop, outdated, there are holes in the probably be narrower. the mating surfaces by capillary Kovar and metallized alumina. The wall-it doesn't look nice." Yeager said hours at the Alpine action. The result is a high quality, filler metal is usually an of The spacious new Main Gate House, Gate might be extended during the permanent metallurgical seal. and , but other alloys containing , , indium, in addition to being more comfortable construction. Check the Web and With other joining techniques such palladium, and other metals are and attractive, will allow for the posted signs for further information as welding or mechanical seals, often used. The brazing process installation of a modern fire alarm on Alpine Gate hours. a unbounded mating surfaces can trap takes place in a specially designed system that relays more information contaminants, are difficult to out- furnace that employs controlled to firefighters. gas and can cause problems with heating cycles in the range between UHV systems. In addition, the high 750 and 1100 degrees Celsius. The temperature pure hydrogen brazing New Signs Promote Safety brazing atmosphere is contained in a atmosphere has powerful cleaning cylindrical retort that can measure 36 effects. Oxides of metals such as 0 inches across and 10 feet in length. Ol copper, nickel, iron and chromium cn ro0w are readily reduced and eliminated, At the present time, this technology is 0pa) resulting in a bright clean surface. being used to assemble components 0: Many other contaminants are required for SSRL and the SPEAR3 0 volatilized and removed during the Upgrade, the Accelerator Department Q..0. n-' brazing process. Modified processes and NLC. We also do special brazing can be employed, such as the use work for other national labs and Alert commuters might have noticed a new yellow warning sign that of wet hydrogen. This method universities. appeared just beyond the Main Gate on January 22. This was one of eight is currently being used for final signs posted at SLAC entrances recently, part of the Lab's For more information on the ongoing effort to processing of high-gradient Next keep safety a priority in all our activities. Mechanical Fabrication Department, Linear Collider (NLC) test structures see: http://www.slac.stanford.edu/ The ES&H Coordinating Council (which encompasses all divisions) decided to reduce surface carbon. grp/mfd/ to post the signs to let visitors and contractors know that they should Many different materials can be be vigilant and inquire as to SLAC For more information on the Klystron safety issues with which they may joined by hydrogen furnace brazing. be unfamiliar. Employees and others in the SLAC community and Microwave Department, see: who have Most brazing at SLAC involves completed the appropriate ES&H training should already be aware of hazards http://wwvw.slac.stanford.edu/grp/ joining copper and/or stainless steel, here. kly/index.html 0 however other materials commonly For more information, contact: Rachel Claus (BSD), Ext. 4343, brazed at SLAC include nickel, iron, [email protected] 0

TYPES OF DETECTORS AND HOW of detectors. Ionizing detectors To avoid nuisance alarms place Smoke Detector THEY WORK respond slightly faster to flaming fires detectors: while photoelectric detectors respond Basics Ionization smoke detectors: *Away from furnace or air faster to smoldering fires. Ideally, a conditioner vents Find Out More About One of The ionization chamber smoke home should be protected by at least · Away from bathrooms to avoid the Most Important Devices detector has a small radiation source one of each. If you can afford only steam in Your Home or Office that produces radioactive material one type, a photoelectric detector is *Away from a cooking area or By Robert Reek (electrically charged particles called recommended. ions), which cause a small electrical fireplace LOCATION, LOCATION, Home fires are a serious threat to current to flow into a chamber. LOCATION MAINTENANCE your family's safety. Every year in the Smoke particles entering the chamber United States, approximately 5,000 attach themselves to the ions, Detectors should be installed either Battery operated smoke detectors people are killed in residential fires reducing the electrical flow. The on the ceiling or on walls between 6 should have the battery replaced and more than 40,000 are injured. change in current sets off the alarm. and 12 inches below the ceiling. annually or when a low warning signal or chirping occurs. Most fire victims suffer from smoke Photoelectric: Detectors should be located in and toxic gases, not as a result of each sleeping area, and between It is important to use the exact make Photoelectric detectors use either bums. Most deaths and injuries bedrooms. and model of battery recommended happen at night while the victims are an incandescent light bulb or a light by the detector's manufacturer. sleeping. emitting diode (LED) to send a In multi-story homes, detectors beam of light. When smoke enters should be located on each story Accumulation of dust, dirt and When properly installed and the detector, light from the beam is of the living area. Basement-level insects can cause a false alarm. Keep maintained, the home smoke detector reflected from the smoke particles smoke detectors should be installed the detector clean by vacuuming is considered one of the best, least into a photocell sensor and the alarm in or near basement stairways in the around its exterior. expensive means of providing early is triggered. basement, not at the top of the stairs. For more information on warning of a fire. Environmental, Health and Safety at WHICH SMOKE DETECTOR IS Do not place detectors closer than six SLAC, see: There is no doubt about it-smoke BETTER? inches of where walls and ceilings http://www.slac.stanford.edu/esh detectors save lives, prevent injuries meet or near heating and cooling The State Fire Marshal of California, and minimize property damage by ducts. A detector placed in these as well as nationally recognized enabling residents to detect fires areas may not get the required air testing agencies, approves both types early. flow to activate. Page 2 Interaction Point February 7, 2003 The Future is on Display Now in Tune In to Videoc:onferencing the Auditorium Lobby By Shaniln Williams and laptops can be connected to Though teleportation is still out of the system to display PowerPoint By Adrienne Higashi presentations or other of topographical lines on the map, reach at SLAC, it's easy to do the next files. the overhead router precisely mirrors What does SLAC have in common best thing- videoconferencing. Bray can set up audio conferences, the stylus' movements and cuts away with Donald Trump's Florida golf which can connect more people with succeeding layers of the polyurethane "As a face-to-face technique, this course, the Stanford University better sound quality than an ordinary block suspended below. really helps," said Art Bray (SCS), the campus, and the City of San phone call Jose? videoconferencing coordinator. "A would. He can also set up All have been modeled in 3-D In addition combined audio-video conferences, to being a planning voice on the phone can say a lot, but topographical format. SLAC's new tool for the people at SLAC and the an expression on the face can say a lot useful if not all the participants model, on display in the Panofsky have Stanford architects, it is also a public more." access to videoconferencing Auditorium Lobby, goes further than presentation tool for SLAC visitors. equipment at their location. most, representing possible future The model is now permanently "Videoconferencing is a more direct "Theoretically, 10 or more sites could developments at the Lab. displayed in the Lobby so visitors way to talk to colleagues across the conference using either technique," to SLAC can begin their site tour by region, the country or the world In order to help decision-makers Bray said. The SLAC conferencing viewing the model and orienting than using e-mail or even telephone visualize how various short- and rooms themselves hold 15 to 20 themselves to the 'big picture'. conferencing," said Bra,'. At a cost long-range planning ideas will fit chairs, but each room's capacity is of three cents per minute, it is together, SLAC's Business Services "This model demonstrates flexible. that the economical, too. Most institutions Division (BSD) teamed with Stanford laboratory has a vibrant future," said have video conferencing capabilities; For more information on University's Architect and Planning Jerry Jobe (BSD). "Even if only half Bray has the complete list of these videoconferencing at SLAC, see: Office to create this modeling tool. the plans are realized, SLAC will be institutions. http://www-project.slac.stanford. The project took about 350 hours to an exciting place to be for the next 20 edu/streaming-media/VideoConf/ complete. The result is a 150-pound, Researchers use the two years." Default.htm 0 144" x 35" model at a 1" = 100' scale. videoconferencing rooms in Building 50 to 'meet' with colleagues at other "Things are brought to life when institutions, but the technology has they are transformed into three Join us for the other uses as well. Visiting professors dimensional models," said Lisa have used it while here to teach Scientific Gemmiti, model maker and owner Discussion Hour classes at their home institutions, (aka, "4 o'clock cookiefest") of the San Francisco studio that and a few graduate students have Tuesdays at 4 p.m. in the Green produced the model. even given their dissertations via Room (3rd Floor Central Lab) SLAC, as it exists now, is reflected in videoconference. During Take These are informal weekly meetings the model, as are the 10- and 20-year Your Kids to Work Day employees' offspring between staff members whose plans for the Lab. Existing structures used the equipment to duties would not ordinarily bring at SLAC are modeled in light grey, communicate with each other from them together (theorists and the 10-year plan in brown, and the different rooms. experimentalists, particle and 20-year plan in white. Buildings In addition to being 'face to face', accelerator physicists, etc.). proposed for the years 2010 and 2020 users can share visual aids. The Sugar-laden refreshments will be are pinned in place, allowing design videoconferencing rooms are provided. flexibility without modifications equipped with document cameras, to the model. New research l rI buildings, a parking structure, pedestrian walkways and plazas are c represented. 31 Stieber to To create the model, SLAC's topographic contour map was '33 Receive Boy traced with a custom-made router- Scout Award type machine mounted on a tripod. To Directly below an overhead cutter _C Joe Stieber (MD) is being awarded head, a stylus is mounted between Model maker Lisa Gemmiti discusses the Boy Scouts of America Silver 31) the legs of the tripod. The stylus is the topographic model of SLAC with Beaver award, the highest honor a used to manually trace the contours, Neil Calder (COM). The model is inow Boy Scout Council bestows upon c2 '8 step by step. As the modeler moves on display in the Panofskiy Auditorium an adult volunteer. The award will VI, around the table, using the stylus to Lobby. be presented to Stieber at a dinner in 0 trace the undulating circumference February. The award is given to u: of each of the hundreds or thousands Boy Scout volunteers who have at 0 least ten years of service U and are 0 outstanding examples for our youth 0o0- New SLAC Poster Available to follow. Joe Stieber (MD) will receive the Silver The average amount of time a person Beaver award, the highest hoilor a Boy takes to earn the Silver Beaver award Scout Colucil awards an adult volunteer. is 23 years; Stieber earned his in just 12 years. Stieber has been part of the SLAC Mechanical Design Department This year 12 out of a total of 4,000 for almost thirteen years. "He is volunteers from the San Francisco an enthusiastic contributor to our Bay Area Council are being honored group," said Pat Wurster (MD). 0 with this prestigious award.

Traffic Alert on Loop Road A trench (shown right) is being dug along the Campus Loop Road between Building 48 (ROB) and the new user A new poster highlighting SLAC "SLAC is a vigorous and visually lodging construction area. science is available from the stunning research center. The poster Communications Office (COM). The was created to share this with our 7The trench is needed for installation of poster will be given to staff, visitors, staff and people from outside the utilities at the new lodging fa7ility. schools-anyone who would like to Laboratory," said Communications vl put it on their wall. Director Neil Calder. II) 0I- This work is expected to run through 0 The poster was created by SLAC's Call or e-mail Joni White (MS 58, Ext. March 7, and there will be periodic lane r, Scientific Arts Media department, 8703, joni.white(aslac.stanford.edu) closures. Please be carefll walkinlg and c 0 and includes photos taken by award- to receive your poster. We have 2,000 driving, and follow any posted traffic >. winning international photographer now but they are going fast! signs. 0 Peter Ginter. -Kathy Bellevin 0.

Interaction Point February 7, 2003 Page 3 NLC Holiday Investing POLICIES AND PROCEDURES Doors Shine Advice Available Drnnrrtv Crnnrnl in tho Hoanllinoc UI I % O IL % 16 E HEII 1 E6 1 U1· Have questions about investing for By Leslit Normandin example, auditors will check that the your retirement? location and custodian match what is There have been quite a few news in our property database. They will Representatives from Fidelity, TIAA- stories in recent months regarding also look at the disposal process. Is it CREF and Vanguard will be holding missing property and alleged all-inclusive-what we call 'cradle to free individual counseling sessions at purchase card abuse at the University grave'? SLAC in Bldg 280, Module A, Room of California's (UC) Los Alamos 180, throughout the year. National Laboratory (LANL). What You Can Do Upcoming dates are listed below. We share with LANL an abiding You can query the database from the Please call the investment company dedication to science. And like BIS Web page under Property (https: directly to set up an appointment: other U.S. national laboratories, we //www-bis.slac.stanford.edu/slaconly/ Fidelity are funded by DOE. Nearly all the bin/assets.asp) to see what property is February 21 equipment and materials used at currently assigned to you. If there are March 5 SLAC are U.S. government property. any changes, you can submit an on- line transfer or update. '0 (800) 642-7131 li This requires that we all practice _rm due diligence in the use, protection, It is important, regardless of the TIAA-CREF m accountability, and disposition of cost of equipment, to ensure that z February 25 property in our possession. government property is labeled. March 25 m ~0z (800) 842-2007 (ask for Patricia Not Immune from an Audit Equipment worth over $300 requires a bar coded property -0 Croteau or see http://www.tiaa- 20 In January, auditors from the label. LI0l cref.org/moc) Inspector General's Office were here Equipment worth under $300 for an entrance meeting to kick off an Members of the Next Linear Collider Vanguard gets marked with a government audit of sensitive property. They are (NLC) group put their creativity to None scheduled property label. currently conducting this same audit work decorating their doors this holiday (800) 662-0106, Ext. 69000 or at the UC Labs. SLAC provided the It is your responsibility to notify season. It was thefourth yearfor the http://www.meetvanguard.com auditors with a list of data items they Property Control when you move or fun competition. A corkscrew, the grand For more information on retirment requested. They were also given a tour transfer equipment. If you use your prize, was given to this year's winning planning, see: of Receiving and Salvage. purchase card to buy equipment, it is door (shown above), decorated by Linda http://www-group.slac.stanford.edu/ your responsibility to notify Property Hendrickson. NLC group members hr/b/retirement.html Remember it is very important to Control. Extra precautions should incorporated traditionalChristmas immediately report missing, stolen always be taken to protect computers, icons, music and even the GLAST logo or damaged property to Laboratory PDAs, cell phones and other similar into their creations. Safeguards and Security. Contact items. For more on the NLC holiday doors, see: Did you know that you can Rick Yeager, Ext. 5333. After hours, call the Main Gate, Ext. Remember that all equipment needs http:/wzww-project.slac.stanford.edullcl easily check your e-mail from 2551. A security officer will take US-JapanlNaomi/Doorcontest2002.htm any Web browser? to go to Salvage for disposal (Bldg. your report, and Property Control 28, Ext. 2329). For any equipment that will receive a copy of the report. Simply go to: http://www- has been damaged, dismantled or is beyond economical repair and did not mail.slac.stanford.edu The auditors will be looking very MILESTONES go to Salvage, please write a memo closely at our procedures and to Property Control detailing the Service Awards Type in your Windows username processes from the moment an item and password to access the specifics. 5 Years is ordered, whether on a Purchase Web-based e-mail system. Contact: Leslie Normandin, Trautwein, Thomasina, SPEAR3, Order, purchase card or contract, and Property Control, MS 85A, Ext. 4350, 02/01 follow it through the system. They For more information on [email protected] Shen, Patrick, EFD, 02/18 will be checking that all paperwork is e-mail at SLAC, see: http:// in order, including signatures on new Valine, Joan, ARDA, 02/01 For more information on property www.slac.stanford .edu/comp/ equipment purchases. 10 Years net/email/index. html procedures, see the Personal Property Chatterji, Santa, OHP, 02/08 The audit will include a physical Management Guide at: http:// Eriksson, Leif, NLC, 02/16 sample of sensitive property. For www-group.slac.stanford.edu/pcd/ property_management.html Q 15 Years Logan, James, SEM, 2/12 Emma, Paul, ARDA, 2/22 Upcoming Events The Interaction Point 20 Years Editorial Team Miller, Paul, AD, 2/1 Tuesday Feb. 11, 12:30 p.m. Feb. 18-20, 9:00 a.m. Neil Calder Boeheim, Charles, SCS, 2/16 SLAC, Orange Room SLAC, Redwood Room AB Nina Adelman Stolar Sanchez, Anthony, SEM, 2/21 SLAC EXPERIMENTAL SEMINAR SLAC PHYSICS MEETING Katherine Bellevin Peter Rowson, SLAC Robert Noble/Angie Seymour, SLAC 35 Years Contributing Editors "New Approach to Double Beta The Second Orion Workshop Vickee Flynn Billitzer-Jenkins, Stanley, ASD, Decay" (http://www-conf.slac.stanford.edu/ Ziba Mahdavi 2/14 Linda DuShane White Tuesday Feb. 11, 4:15 p.m. orion/) 40 Years Stanford, SEQ 201, (Refreshments- Feb. 24-28, 9:00 a.m. Writers Browne, Michael, ESD, 2/4 4:00, Physics Coffee Rm) SLAC, Panofsky Auditorium Tom Mead Shawna Williams Retired STANFORD APPLIED PHYSICS/ SLAC PHYSICS MEETING Abuan, Higinio, MFD, 1/31 PHYSICS DEPT COLLOQUIUM Marcello Giorgi/Barbara Barrera, Photography/Graphics Diana Rogers Chin, Chuck 'Norman', MD, 1/31 Hitoshi Murayama, UC, Berkeley INFN-U of Pisa/SLAC Michael Hyde Francis, Jean, PEL, 1/29 "The Next Twenty Years in Particle BaBar Detector Collaboration Sodja, Joseph, AD, 1/31 Physics" Meeting Distribution Crystal Tilghman Deceased Wednesday Feb. 12, 4:15 p.m. Wednesday Feb. 26, 4:15 p.m. SLAC, Orange Room SLAC, Orange Room, The Interaction Point is published bi- Gross, Richard, retired from KLY in (Refreshments-4:00) (Refreshments-4:00) monthly every first and third Friday. Submissions are due the second and 1993, age 68, on January 20, 2003 SLAC ASTROPHYSICS SEMINAR SLAC ASTROPHYSICS SEMINAR fourth Tuesdays of each month. To submit a Milestone, see: Chung-Pei Ma, UC, Berkeley Armen Atoyan, U of Montreal http://www.slac.stanford.edu/pubs/ "From the Cosmic Microwave To be announced... Send submissions to tip/milestoneindex.html Background to Dark Matter: A tipq@•slac.stanford.edu, or mail to Please send additions to: TIP Editor, MS 58, Boltzmann Approach to Modern Stanford Linear See Awards and Honors at: seminarsC(aslac.stanford .edu Accelerator Center, 2575 Sand Hill Road, http://www.slac.stanford.edu/slac/ Cosmology" For complete event listings, see: Menlo Park, CA 94025. award/ http://www.slac.stanford.edu/grp/ TIP is available online at: Page 4 Interaction Point February 7, 2003 pao/seminar.html http://www2.slac.stanford.edu/tip/