^Interaction PointEvents and Happenings

in the SLAC CommunityFebruary 1994, Vol. 5, No. 2

NEW ERA FOR TECHNICAL DIVISION

Dave Burke Lowell Klaisner ureg Loew

Ewan Paterson

By Janice Dabney

THE TECHNICAL DIVISION atSLAC has entered a new era, posi-tioning itself to support the PEP-IIproject and utilizing the skills ofits staff in new ways.

As of February 1, the AssociateDirector of this division, KayeLathrop, moved into the positionof Associate Director at large, free-ing him from the administrativeduties he had addressed in his tenyears of service and enabling himto assist the SLAC Director withspecial projects.

In Kaye's place, Ewan Patersonstepped into the role of TechnicalDivision director, with his admin-istrative assistant Kathy Asher.Dave Burke, Lowell Klaisner, andGreg Loew are now the key com-ponents of his management staff.

Lowell Klaisner will spend90 percent of his time as ChiefEngineer with PEP-II and 10 per-

cent of his time in the TechnicalDivision. He will coordinate twodepartments: Mechanical Fabrica-tion and Mechanical Design. EwanPaterson will directly managethree departments: AcceleratorDepartment, Controls, and theKlystron Department. Greg Loewwill add to his Deputy DivisionDirector's duties by overseeingPower Conversion, Plant Engi-neering, and Metrology. DaveBurke joins the Technical Divisionas a new assistant director, coordi-nating the efforts of AcceleratorTheory and Special Projects, theFinal Focus Test Beam, and otherNLC-related projects.

In order to provide more con-solidation of support to ongoingoperations, the Vacuum Grouppersonnel have been integratedinto the Accelerator Departmentand Mechanical FabricationDepartment.

To strengthen our precisionmeasurement capabilities, we havecombined Survey and Alignment,Magnetic Measurements, andQuality Assurance into onedepartment, the new MetrologyDepartment under Robert Ruland.

SLAC has an international reputa-tion for excellence in all of theseareas and combining them under acommon management will maketheir strong functions evenstronger.

The Technical Division is chal-lenged by the future and will con-tinue to improve its excellentperformance with the ongoingoperations of SLC, NLC, and theEnd Station A programs whileproviding cost-effective, high qual-ity support to PEP-II.

Kaye Latnrop

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NEW GROUP IN RESEARCH DIVISION

Shown above are Group K members, left to right, back row: Steve Meyer,John Broeder, Gary Godfrey, Elliott Bloom, Ken Fairfield, Bill Tompkins;middle row: Lynn Cominsky, Han Wen, Andrew Lee, Bill Atwood, LindaLee Evans; kneeling: Art Snyder, John Hanson.

By Elliott D. Bloom

THE RESEARCH DIVISIONnow has a new group-Group K.The mission of this group is half-time PEP-II and half-time particleastrophysics. This mixed missionis due partially to history and par-tially to the schizophrenic physicsinterests of the group's members.

Historically, many members ofGroup K were involved in theHigh Luminosity PEP upgrade,and the TPC/2y detector physicsprogram in the late 1980s. Theyhave been long-time strong sup-porters of the PEP-II upgrade.After the end of the TPC/2y pro-gram, group members took amajor responsibility for the con-ceptual design of the PEP-II injec-

tion system and elements of theparticle physics detector. Current-ly, Elliott Bloom is the PEP-II injec-tion system manager, and ArtSnyder is co-leader of the BaBarDetector simulation group. Othermembers of the group put in abouthalf their time on PEP-II as well,with Gary Godfrey leading theinjection diagnostics and instru-mentation effort, and Bill Atwoodheavily involved in the detectorsimulation effort. John Broeder isworking on the injection beam lineinstrumentation, while Steve Mey-er spends most of his time on thePEP-II database system.

The Particle Astrophysics pro-gram was originally begun by theSLAC Faculty and Directorate in1991 through the efforts of Elliott

Bloom and SLAC ProfessorRichard Taylor. The Group Keffort has focused on spaced-basedparticle astrophysics experiments,while Taylor has been more inter-ested in ground- based gravita-tional wave detection experiments.The purpose of this program is toexperimentally probe relativisticgravity. The group believes thatonly new data will facilitate thediscoveries needed to fully inte-grate gravity with the rest of thefundamental forces currently stud-ied in particle physics.

Group K now has two majoractivities in particle astrophysics.The first is a spaced-based x-raymission designed to probe thenear gravitational field of neutronstars and black hole candidates.

The x-ray experiment is calledthe Unconventional Stellar Aspectexperiment, or USA for short. Basi-cally, it consists of two veryrugged multiwire proportionalchambers sitting side by side. Thefield of view of the chambers iscollimated (made parallel, oraligned) to a cone of 1.2 degreesnormal to the thin window of thechamber. This collimation allowsus to view one object at a time,without getting confused by sig-nals from objects that are nearbyin the sky. The chambers and asso-ciated collimators are mounted ona pointing system that preciselytracks stellar objects while thespacecraft orbits through space atabout 5 miles/sec, 450 miles abovethe earth's surface. The x-raydetector counts the x-rays one-by-one as they arrive. The brightestobjects we measure will put20 kHz of x-rays into the detector,while the lowest go to a fraction ofa Hz. In normal operating mode,we measure the energy of eachphoton to about 15% and time itsarrival to within 4 microseconds.

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The primary collaborator in theUSA experiment is the NavalResearch Laboratory (NRL) SpaceScience division in Washington,DC . Group K has been responsiblefor building the USA collimatorsand the detector and pointing sys-tem mechanical supports, or aboutone-third of the detector. Graduatestudents John Hanson and HanWen, working with John Broederand Gary Godfrey, made pivotalcontributions to this effort. NRLhas handled the rest of the hard-ware and electronics. Our work onthe detector has been completed,and the pieces have been sent toNRL. They are very happy withthe results. We are now focusingon flight software for the experi-ment. Ken Fairfield and AndrewLee are doing this work. We arealso preparing for data analysis.Lynn Cominsky, a visiting profes-

experiment formuch less moneythan comparablex-ray experi-ments adminis-tered by NASA.Currently ARGOSis on scheduleand budget afterover three yearssince approval.We have lessthan two years tolaunch and arelooking A-OK(and keeping ourfingers crossed)!

Group K'ssecond majorparticle astro-physics activity

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is canlled UiLA I, or Graduate studEgamma-ray large is part of the dearea silicon tele- USA experimerscope. The goal is

ent John Hanson sitting in the yolk thatetector pointing system support for the'7t.

sor from Sonoma State University, to explore astronomical sources son's group in the Stanford phys-has made the major contributions that emit gamma rays in the ener- ics department, and NRL. Billin this area, together with our gy range 15 MeV to 1 TeV. This Atwood is the project scientist andgraduate students. experiment will build on the excit- SLAC spokesman for the effort.

USA will be launched (using a ing discoveries and results of the The work is partially supported byDelta II rocket) as one of a group energetic gamma-ray experiment SLAC and partially through aof five science NASA R&D con-experiments tract. We are inves-on the Air "The Air Force Space Test program approach has tigating ways toForce satellite get GLAST intoARGOSin late allowed us to build a state-of-the-art x-ray experi- space as soon as1995, admin- possible-in tenisteredbythe ment for much less money than comparable yearsorless.AsAir Force part of this strategySpace Test x-ray experiments administered by NASA." we proposeProgram launching a small-(STP). It has er-scale instru-been a plea- ment, a GLASTsure working with the STP folks.They have given us considerablefreedom in deciding how to buildthe experiment, with a minimumof paperwork. I am told by myspace physics colleagues that thisis very unlike NASA. The STPapproach, coupled with a very fastschedule to launch after approval(five years), has allowed us tobuild a state-of-the-art x-ray

telescope (EGRET) currently oper-ating on the NASA satellite, theCompton gamma-ray observatory.

GLAST is now in an R&D stageexploring new technology for thenext space-based gamma-ray tele-scope. GLAST will be made using1990s particle physics technology.

To explore the new technicalapproach for GLAST, Group K iscollaborating with Peter Michel-

prototype, in a few years. Becauseof technology improvements, ourprototype, about four percent ofthe full GLAST, will have approxi-mately the capabilities of EGRET. Ifwe are successful, such a devicecould continue the exciting work ofEGRET after it has to shut downabout two years from now, withouta long wait for the full GLASTinstrument to be in orbit.

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Everything You Always Wanted to Know About Dosimeter Badges*(*But Were Afraid to Ask)

"BADGES? We don't need nostinking badges!" may haveworked for the bad guys in theclassic movie Treasure of the SierraMadre, but it doesn't work atSLAC. Everyone who works atSLAC for more than thirty daysmust get a badge...a dosimeterbadge that is.

A dosimeter badge recordsradiation exposure. After youexchange your dosimeter badge,your radiation dose is read from itto ensure that you haven't beenexposed to unsafe levels of radia-tion. Dosimeter badges areexchanged either once a year orfour times a year, depending onthe type of training that you havecompleted and the type of dosime-ter badge that has been issued toyou. In order to obtain a dosimeterbadge, you must complete radio-logical training. Retraining isrequired every two years.

For those of you who may havehad questions about your dosime-ter badge but were afraid to ask,here are the answers to the top tenmost frequently asked questions:

How do I know when my radio-logical training or my dosimeterbadge will expire?

The dates are on your dosime-ter badge. On the old style ofdosimeter badge, the sticker onthe top right indicates the type of

training that is requiredand the date that thetraining expires. Thesmaller sticker on the bot-tom right indicates whenthe badge expires andshould be exchanged fora new one.

On the new style ofdosimeter badge (avail-able since October '93),Lh L imL yn r'f rI (ti aI IJirsl(ILILC Ly H1 1l aLUUl UL±aI

training required is indicatedbeneath the word training and thetraining expiration date is indicat-ed beneath the word expires. Thebadge number is indicatedbeneath the word dosimeter andthe date when the dosimeterbadge expires and must beexchanged for a new one is to theright beneath the word expires.

My training is about to expire-what should I do?

Don't panic! Contact the ES&HTraining Team at ext. 2688 to reg-ister for radiological retraining. Ifyou have a quarterly dosimeterbadge you will need to take Radi-ological Worker Trainer (RWT)and if you have an annual dosime-ter badge you will need to takeGeneral Employee RadiologicalTraining (GERT).

I have a new employee-do newemployees need dosimeter badges?

Everyone who works at SLACfor more than thirty days mustreceive radiological training andobtain a dosimeter badge. Thispolicy applies to all SLAC employ-ees, visitors, users, and subcon-tractors.

I have a Ph.D. in physics-why doI need radiological training?

Although you probably alreadyknow all about radiation, SLACpolicy requires that everyonereceive radiological training,experts and amateurs alike.

I've completed radiological train-ing-what do I do next?

After you successfully com-plete radiological training, youwill receive a SLAC DosimeterBadge Request Form which hasbeen signed by the instructor. Youmust complete and sign the form.If this is your first dosimeterbadge, your supervisor must alsosign the form. Your supervisordoes not need to sign the formafter you have been retrained.Take the completed form to theDosimetry Office (Room 130,Building 24) between 1:30 PM and4:15 PM, Monday through Fridayto have your picture taken and toreceive your dosimeter badge.

Can I use my SLAC dosimeterbadge at other DOE labs?

No, your SLAC dosimeterbadge is not valid at other DOElabs. If you visit another lab, thecore material from the radiologicaltraining you receive at SLACshould be acceptable but you willneed to participate in their site-specific radiological safety pro-gram. You will need to check withthat facility for details. Your SLACdosimeter badge should not betaken to other DOE labs.

I've seen the new dosimeterbadges-how do I get one?

You will get the new style ofdosimeter badge the next time thatyou receive radiological training.If your training hasn't expired yet,

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Awareness and prevention keys to avoid attack

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JIM MATHER, FOUNDER OFthe California Karate Academy,was the featured speaker at aWomen's Interchange at SLAC pre-sentation on self defense. Matherteaches several courses in the mar-tial arts and self defense.

In his talk, Mather placed astrong emphasis on prevention.He urged everyone to be constant-ly aware of their environment andhabits and to look for areas ofpotential threat. "Be aware of thesurrounding area and of possibleescape routes," he said.

Mather also stressed the impor-tance of advance planning-anytime you drive, he says, youshould "plan out your route soyou don't drive in dangerousneighborhoods, be sure you haveplenty of gas, and always lockyour doors."

In case you do find yourself in aphysically threatening situation,your first step should be to controlthe distance between yourself andthe attacker. Do not let the attackerget near enough to reac.one move. "Don't letsomeone get so closethat you have to relyon blocking," he said.If possible, move so thatobject (a car, for examplyou and the attacker.

In a life-threateningthere are three areas of 1you should aim for, MaFirst, move to take out tSecond, attack the eyes-can't be seen, you can'tThird, attack the throatplexus to interrupt the IMather warned against

that are designed to induce painbecause the adrenaline in theattacker's body will numb thepain.

Mather also cautioned the audi-ence never to attack someoneunless you are in a life-threateningsituation. "It is never against thelaw to defend yourself, but it isagainst the law to go beyonddefending yourself," he said.

In sum, Mather stressedthat most attacks can be

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but you want to exchange yourold-style badge for the new style,just complete the SLAC DosimeterBadge Request Form and take it,along with your old badge, to theDosimetry Office during normaloffice hours. Your supervisor doesnot need to sign the form if you'rejust trading badges to get the newstyle of dosimeter badge.

I lost my dosimeter badge-whatshould I do?

Don't enter any controlled areauntil you obtain a new dosimeterbadge. Obtain a SLAC Lost/Dam-aged Dosimeter Form from yourdepartment's group secretary. Fill

in the first section of the form withthe personal information request-ed. Also complete and sign thesecond section of the form entitledWorker Statement. Have yoursupervisor complete and sign theSupervisor's Statement section.You must also complete the SLACDosimeter Badge Request Form(available from your department'sgroup secretary) and have yoursupervisor sign it. Take the formsto the Dosimetry Office duringnormal office hours to replaceyour dosimeter badge.

I accidentally put my dosimeterbadge in the washing machinewith my laundry-will it stillwork?

Your dosimeter badge is proba-bly unharmed (but clean!). Youshould take it to the DosimetryOffice to have it evaluated to makesure that it is OK.

My badge broke-how do I get itfixed?

Take the broken badge to theDosimetry Office, and they will fixit for you. A few people have triedto repair their broken dosimeterbadges in some very creativeways, including stapling, melting,and gluing. These methodshaven't been successful and arenot recommended.

-Jack LaVelle

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ATM arrives on site IRDF FYTINImI IIC-IHFiR AFFTVI A E% IL L I aI J IL. rv &..ii . I. u u

WHEN SHE ARRIVED at work

Teresa Cervantes makes a lunch-time withdrawal at the new Stan-ford Federal Credit Union cashmachine in Room 101 of the A&EBuilding. The ATM was installedon February 3 and is free for mem-bers of the Credit Union. Themachine also accepts ATM cardsfrom other major financial institu-tions, but a fee may apply. Themachine does not accept deposits.For any questions about the CreditUnion, or to start a Stanford Feder-al Credit Union account, pleasecall 694-1000.

one day, Terry Ash, of thetional Health Physics Depcment, discovered that shecouldn't turn off theengine of her car. Thenshe noticed smoke bil-lowing out from underthe hood. Opening thehood revealed sparks fly-ing. Terry ran into the neaest building to call 911 forhelp. Meanwhile, a well-meaning passerby grabbecthe nearest fire extinguishhoping to snuff out thesparks before they ignitedwhole car. Unfortunately ]had grabbed the wrong tyfire extinguisher; it was ncable for an electrical fire.passerby noticed the mistake, andswitched the wrong fire extin-guisher with the right one. Thesparks were promptly extin-guished, and the car suffered littledamage. This incident had a hap-py ending but it illustrates theimportance of matching the cor-rect type of fire extinguisher withthe particular type of fire thatyou're fighting.

For this reason, only peoplewho have completed fire extin-guisher training may use fireextinguishers at SLAC. In the train-ing class, you learn that there arethree basic classes of fires:

* Class A: Ordinary combustiblessuch as wood, cloth, paper,rubber, and many plastics.

* Class B: Flammable liquidssuch as gasoline, oil, grease,tar, oil-based paint, lacquer,and flammable gas.

* Class C: Electrical equipment,including wiring, fuse boxes,circuit breakers, machinery,

and appli-ances.

All fire extin-guishers are clear-ly labeled with anA, B, and/or C to

indicate which typeof fire they aredesigned to handle.The majority of fireextinguishers at SLACare labeled "B-C" andcan be used on ClassB and C fires. Thereare also many multi-purpose fire extin-guishers labeled'A-B-C" that can beused on all threelasses of fires.

It is dangerous touse a tire extinguisher

labeled only for Class A fires on agrease or electrical fire, since ClassA fire extinguishers contain com-pressed water that can actuallystimulate a fire instead of sup-pressing it. If the well-meaningperson in the sparking car engineincident had used the fire extin-guisher labeled "A," chances arethat the result would have beencostly repairs, or even personalinjury.

Fire extinguisher training isheld on-site once a month by thePalo Alto Fire Department. Allpersonnel are encouraged to talkwith their supervisor about takingthis training. To sign up for fireextinguisher training, contact theES&H Training Team at ext. 2688.

Knowing the right fire extin-guisher to use for a specific type offire can mean the differencebetween a minor incident and amajor disaster.

Jack LaVelle and Melinda Saltzberg

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The Interaction Point © 1994, is published by Information Services of Stanford Linear Accelerator Center. Editor: Evelyn Eldridge-Diaz. Staff

Writer: Sarah Morisseau. Photographer: Tom Nakashima. Deadline for articles is the first of every month. Items are published on a space-

available basis and are subject to edit. Submissions may be sent electronically to TIP@SLACVM or by SLAC mail to TIP, MS 68. Phone 926-4128.

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Girls to visit on April 28

Ray Arnold shows his daughterCarolyn a graph in the PublicationsDepartment. All employees are invitedto bring their daughters age 9 to 15 towork for one day on Thursday,April 28. Registration forms for theevent will be showing up on yourdesks soon. For more information or tovolunteer to help for "Take OurDaughters to Work Day" contactEvelyn Eldridge-Diaz at ext. 4128.

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BLACK-AND-WHITE

PROCESSING

FREE NO LONGER

THE PUBLICATIONS Depart-ment will now charge requestorsfor black-and-white photo pro-cessing, except when necessaryto produce a SLAC PUB, TN, orREPORT. As is the case withcolor processing, requests forblack-and-white processing willneed an account code. All pro-cessing requires two workingdays. In the case of color, twoworking days are needed foreach transaction from a nega-tive-for example, to maketransparencies and prints fromthe same negative requires fourworking days. Any rush fees willbe charged to the requestorincluding rush work necessaryfor PUBs, TNs, or REPORTs.

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Guckenheimer award to Cafe

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The staff of the SLAC Cafe receiving the Standards and Safety Award.The award plaque hangs immediately inside the entrance to the food ser-vice area, and names all of the Cafe employees. Shown are, left to right:Tamara Johnson, Area Supervisor; Jesus Balderas, Pantry, JuvenilMoreno, Utility; Pilo Martinez, Grill Cook; Dave Levell, Chef; PamelaWashington, Cashier; Jackie York, Catering; Sigrun Williams, Manager.

IN EARLY FEBRUARY the SLAC Cafe employees received the Gucken-heimer Standards and Safety Award. Guckenheimer Enterprises, Inc.operates the SLAC Cafe.

"We're very proud of the award," says Sigrun Williams, Food ServiceManager of the Cafe.

The SLAC Cafe competed with nearly 90 other northern California Guck-enheimer locations to receive the award. Mr. and Mrs. Ritchie, owners ofGuckenheimer Enterprises, Inc., brought a cake to the award ceremony andalso gave Sigrun a check to take the staff out to dinner.

The highly competitive award is given once each quarter. The Gucken-heimer location that wins the distinction must meet all sanitation, safety,and menu standards; have a low employee turnover rate; submit its cashand paperwork on time; and properly train its employees.

Sigrun has been working for Guckenheimer for 10 years, two of whichhave been at SLAC. This is the first time she has won the award. She feelsthat the SLAC environment has contributed to her staff's success. "Iinstantly felt at home here," Sigrun says. "I think we all do-and it has

brought out the best in us."Sarah Morisseau

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Welcome guests and new employeesPaul Bellomo, Power Conversion; Donatella Falciai, Linear Detector; Richard Fischer, B

Factory; David Jeglum, Plant Engineering; Colin Jessop, Experimental Group C; Shuji

Matsumoto, Accelerator; Masao Kuriki, Experimental Group A; Eric Lee, Experimental

Group E; Yuri Nosochkov, Theory; Massimo Placidi, Linear Collider; Eric Reuter, Engi-

neering; Yves Roblin, Experimental Group A; Cary Salsberg, Metrology; Tsumoru

Shintake, Experimental Group I; Bazil Tabachnik, Plant Engineering; Yiping Tan, Experi-

mental Group C; Steve Virostek, Accelerator; Man Wang, Experimental Group C;

Jianping Zheng, Experimental Group C.