lInfprretinn PnintEvents and Happenings

in the SLAC CommunitySeptember 1996 Vol. 7 No. 6

Gill Donates Bone Marrowby Penny Nichols

BONE MARROW DONOR MandeepGill was recently hobbling aroundfor about a week after giving 1.3liters of bone marrow for an inter-national donation. The recipient isa 48-year-old male with acute leu-kemia and without this infusion ofbone marrow would have a muchmore limited, and perhaps negligi-ble, chance of recovery.

Gill is a Berkeley graduate stu-dent doing research at SLAC withhis advisor Stanley Brodsky. Gilljoined the National Marrow DonorProgram last year when he heardthere was a severe shortage of cer-tain ethnic groups represented inthe national database.

Why did he sign up to givebone marrow? "I would be sacri-ficing very little compared to whatthe recipient is going through, andI would certainly hope that some-one would do the same for me if Ineeded it," said Gill.

Relaxing at his desk, Mandeep Gillmuses philosophically about the largermeaning of donating bone marrow.

Many tests are done to deter-mine compatibility, and initiallythere is only a one in several mil-lion chance of a fit between anytwo people. The marrow extrac-tion process takes about 40

minutes and is done under generalanesthesia. Aspiration needlesinserted into the interior of thepelvis through its iliac crest locat-ed in the lower back withdraw themarrow. The donor's marrowcompletely replaces itself within afew weeks.

The extracted marrow was im-mediately refrigerated in a chilledcontainer and flown overseas tothe transplant center. It must betransfused within 48 hours to beeffective. Gill's Web site givesmore details about the entireprocess:http://www-leland.stanford.edu/-msgill/marrow.html

"I was pretty tired for a coupleweeks after the donation, but nowI am riding my bike again, so I'mokay. But it will be a month until Ifind out if the transplant was suc-cessful," said Gill.

For more information aboutbeing a bone marrow donor, con-tact the Stanford NMDP Coordina-tor Diane Hill at 723-5532, or Gillat msgill@leland.stanford.edu.

TlYour Calendar for Fam^ MB by Karen McClenahan

ARE YOU READY for fun? If not,get ready because Family Day willtake place on Saturday,September 7, from 10 a.m.-4 p.m.This SLAC-sponsored day of activi-ties for all ages will feature lunchwith a new menu of barbecuedchicken sandwiches, hot

dogs/sausages, and assorted sidedishes. For kids, activities includea train ride, carnival booths, andclown and magic shows. Foradults we will have a 28-footclimbing mountain, a joust game(picture American Gladiators),music by request all day, andmuch, much more! Be sure to reg-ister your volleyball team with

ily DayRon Barrett x3339 for the tourna-ment. The whole family can lookforward to tours of SLAC and thenew Visitor Center. Everyone isinvited to join in the fun!

Check out our Web page athttp://www.slac.stanford.edu/ reb/family.html/ and the Family Day fly-ers for more information andT-shirt order forms.

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State of SLAC: Science and Safetyby P. A. Moore

The remainder of the All HandsIN HIS ANNUAL State of SLAC talk meeting concentrated on SLACon August 1, Director Burton events over the past year, scientificRichter outlined the budget issues accomplishments in synchrotronfacing SLAC for fiscal year 1997 and high energy physics, and oth-that begins October 1, but used er announcements.the majority of the tiitalk about safety issuand scientific accom-plishments. A video-tape of theDirector's talk isavailable in theSLAC library.

r reviewed the safetyareness sessions thatook place in March.After outliningactions taken as aresult of those meet-ings, he emphasized

his "Work Safe,"Let's get the bad \tIL ,b1962 ,//V Work Smart" motto.

news out of the way M.' "We will have safety

first," said Richter, D awareness meetingsannouncing that the work _^ again next year to see whatforce will be reduced by 25 full- has changed, but each of us istime equivalent workers and that responsible for our own safety,"accelerator operations will be cut he emphasized.from nine months to seven On August 5, the Personnelmonths. In addition, some projects Office distributed a memo outlin-would be deferred. ing the details of voluntary layoffs

"The budget numbers are based and voluntary reduction in time.on the present situation. They can Contact the Personnel Office if youchange, but I don't expect big did not receive a copy or if youchanges," according to Richter. have any questions.

DOE Says "No" to Net Sex

Who's the oldestof them all...DO YOU HAVE an old SLAC park-ing sticker on your car? We wantto identify the oldest sticker still inuse. Send your name, the stickernumber, and year acquired totip@slac.stanford.edu (or VickeeFlynn, MS 20). We will contact theone with the oldest sticker for anarticle in a future issue of TheInteraction Point!

by Bill Johnson

NEARLY 100 EMPLOYEES at a fed-erally funded laboratory were dis-ciplined for using their work com-puters to access sexually explicitInternet sites, according to a newsarticle by the Associated Press dat-ed December 15,1995. PacificNorthwest National Laboratorysuspended 21 workers who usedthe sites most frequently. Another77 workers received written repri-mands.

According to the PNNL spokes-person, most of the scanning ofadult bulletin boards occurred onworkers' own time but still violat-ed company policy against usingwork computers for personal use.

The Department of Energy'sposition on use of government

resources was restated by ArcherL. Durham, Assistant Secretary forHuman Resources and Adminis-tration, in a "Message for AllDepartment Employees" datedFebruary 16, 1996:

"As public servants we

are expected to hold our-

selves to the highest stan-

dards of behavior and

stewardship. As managers

and supervisors, we should

remind our employees of the

risks associated with inap-

propriate use of official

time and Government equip-

ment. . .Our policy of zero

tolerance for the inappro-

priate use of the internet

should be clearly under-

stood and followed by all."

(cont'd. on page 6)

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NLC Test Accelerator Starts Commissioningby Ted Lavine

SLAC'S NEWEST accelera-tor, the NLCTA (short forNext Linear Collider TestAccelerator) reached amajor milestone in Augustwith the start of commis-sioning. The NLCTA is partof SLAC's on-going devel-opment of accelerator andmicrowave power technol-ogy for a future electron-positron linear collider,dubbed the "Next LinearCollider" (NLC). SLAC'sdesign for the NLC incorporate9,500-meter-long linear acceler(linacs) to accelerate electron apositron beams (one beam in elinac) to beam energies of 250 (or more. (One GeV is one-billicelectron volts.) In contrast, themum energy of the two-mile-hlinear accelerator at SLAC is 60

The goal of the NLCTA projEto test SLAC's design for the NIlinacs, which are designed to kenergized by 11.4-gigahertz mwaves, which have one-fourthwavelength of the 2.856-gigah<microwaves used by the curre]linac. (One gigahertz is one-bilcycles per second.) The accelergradient (or energy gain per lein the NLCTA is 0.05 GeV per rIn contrast, the gradient in therent accelerator is only 0.02 Gemeter. The decision to use sho:wavelength microwaves was cseveral design choices made tcachieve simultaneously higheidients and save electric powerrunning a future NLC. It requi:new type of structure to accekthe electron beam and also reqthe Klystron & Microwave Dement to develop a new type ofstron to produce more than 50megawatts of peak power at tlnew microwave frequency.

The first section of the NLC-accelerator structure and the fJ

/L A-4 _ - ^ owr

megawatt NLC-type klystron wereproduced and successfully testedat SLAC early last year. Since then,three more accelerator sectionsand three more klystrons havebeen built. A further improvedversion of the klystron (with peri-odic permanent-magnet focusing,instead of a power-consumingelectromagnet) was successfullytested in June 1996. R&D is contin-uing to make the new klystrondesign highly reliable and cost-efficient for mass production.

The 42-meter-long beam line ofthe NLCTA contains an electrongun, focusing magnets, steeringmagnets, collimators, beam posi-tion monitors, beam profile moni-tors, beam current monitors, andother diagnostic instruments, inaddition to acceleration sections.The entire beam line is installedand under vacuum in a concretehousing partially inside and par-tially outside of End Station B.

The NLCTA eventually will con-tain 12.6 meters of NLC-type linearaccelerator structure (in 8 sections,two of which are 0.9 meters long,and six of which are 1.8 meterslong) and four stations of kly-strons and modulators. At present,only the pair of 0.9-meter accelera-tor sections, and the first klystronand modulator, are installed.While the NLCTA's accelerator is

only 1/1000 the length of, . an NLC linac, it is a mod-

ular, engineered proto-type for the NLC.

The NLCTA pro-ject was conceived in

eltcJ,- 1991, and has been man-7J9' *aged by Professor

Ronald Ruth, Head ofs3,j 5. the Technical Division's

Accelerator ResearchDepartment A (ARDA,formerly known asAccelerator Theory &Special Projects). Signifi-

cant contributions to the projecthave been made by scientists,engineers, and technicians frommany departments at SLACincluding ARDA, Klystron &Microwave, Controls, Power Con-version, Mechanical Fabrication,Experimental Facilities, RadiationPhysics, Technical Planning, andGroup I. SLAC accelerator physi-cists and engineers collaboratedwith their counterparts at the KEKlaboratory in Japan on the fabrica-tion of the new acceleratorstructure.

Milestones in the NLCTA projectinclude: completion of the Concep-tual Design Report (SLAC Report411) in August 1993; commission-ing of the 150-kilovolt, 1.8-ampereelectron gun in May 1996; and thefirst high-power microwaves intothe first two accelerator sectionson August 1, 1996. Acceleration ofthe first beam to 0.1 GeV isplanned for a later date. Installa-tion and commissioning of the restof the NLCTA linac and its micro-wave power systems, which willproduce beam energies up to 0.5GeV, is planned by the end of theyear. Future upgrades planned for1997 include adding more kly-strons to achieve higher accelerat-ing gradients (up to 0.085 GeV permeter), and are expected to pro-duce beam energies up to 1 GeV.

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Bye-Bye BITNET Bye-Byeby Joan M. Winters

IT'S THE END of a 13-year relation-ship. From June 1983 to July 1996BITNET propelled SLAC into theage of national, then global, email.The network allowed users toexchange messages in real timefrom their terminals. People couldcarry on conversations at a dis-tance without using the phone orcould command remote processeslike LISTSERV. Started in 1981 byCUNY and Yale, membership inthe network burgeoned during1985-90, with the high energyphysics community leading theway.

Around 1985 BITNET hiredEducom to provide some of thenetwork operational support. Atthe peak in 1991-92, BITNET andits Cooperating Networks likeEARN in Europe had 1400 institu-tional members in almost fiftycountries on five continents. Thisinfrastructure meant most mem-bers of the SLAC community couldexchange various types of

Gathering to say bye to BITNET are,left to right, Joan Winters, Les Cottrell(in back), Charley Granieri, andRenata Dart.

information in minutes or hoursinstead of days, weeks, or never.

Files that did not fit in emailcould be transferred, allowingpeople to bypass tapes and nation-al postal services. The high energyphysics community pressed thelimits of BITNET and its

cooperating networks on othercontinents with the size of the filesit sent. In 1985 SLAC's Les Cottrellconceived and helped implementthe BITSEND and BITRCV com-mands to split up large files fornetwork transmission and toreassemble them at the other end.This code became popular at acouple hundred nodes, reducingpressure on the network.

At SLAC, BITNET support camefrom John Halperin and RenataDart, BITNET Technical Represen-tatives; Charley Granieri, VMSmaintainer; Teresa Downey, Mail-er maintainer; Bebo White, LIST-SERV maintainer; Joan Winters,BITNET Information Representa-tive; and Les Cottrell, BITNET Insti-tutional Representative.

As the Internet usage has in-creased, BITNET's utilization hasdeclined. Now it is passing intohistory "Because It's Time." For 13years SLAC benefited greatly fromthe existence of this seminal, glob-al network. BITNET connected theacademic world electronically.Now we move onto the Internet,which BITNET helped to create,and a connection to a wider world.

National Search to Replace Dickens in Computer ServicesSLAC IS UNDERGOING many changes, a major onebeing the retirement of Chuck Dickens as the head ofComputer Services. Dickens has made major contribu-tions to SLAC and replacing him will be difficult. Thelab has been fortunate to have the benefit of his exper-tise for many years.

"Given the importance of this position, SLAC is con-ducting a nationwide search for his replacement tomaintain our excellence in scientific computing,"according to Doug Kreitz, who is handling the logis-tics for the search committee. "We've set up broadlybased interview teams representing the SLAC comput-er user community to make sure we involve peoplewith many different points of view," Kreitz added.

From a pool of over 80 applicants, five finalists werechosen and interviews took place in August. Each can-didate had two full days of interviews, and the processincluded a formal presentation by the candidate to aninvited audience.

The four different teams assembled for the inter-views included SLD's Terry Shalk, who heads a teamon scientific computing needs, while Chuck Boeheimis the team leader for technical support computing. Ateam of senior staff from SCS headed by Clarice Rinardwill provide input on the candidates from an opera-tions standpoint. The Associate Directors Committeeon Computing forms the fourth team.

Each team has a formal set of questions for the can-didates and, based on the responses, candidates willbe ranked and the list submitted to David Leith, headof the Research Division. Leith will make the finaldecision based on the input of the teams and of others.

"This is an important position to fill at a criticaltime in SLAC's history and we are doing our best toensure that people from all major areas of computingare involved in the process," said Leith.

Once an offer goes to a candidate, the person will beexpected to take responsibility within 30-60 days.

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ES:on

3j

When Nobel Laureates Get Together

Jerome Friedman, from MIT, looks on skeptically as SLAC Director BurtonRichter gestures emphatically. The discussion between the two NobelPrize winners took place at the Snowmass Conference in July, wherephysicists gathered for three weeks of intensive study and workshops.Watch for an article about the Snowmass Conference in an upcomingInteraction Point. Friedman shared the 1990 Nobel in physics with SLAC'sRichard Taylor and MIT's Henry Kendall for research done here on deepinelastic scattering. Richter's 1976 Nobel, shared with Samuel Ting fromMIT, was for the discovery of the J/Psi particle.

Reader Responds to Traffic ArticleREGARDING THE ScofflawsBeware! article in August's news-letter, Ken Underwood, ControlsDepartment, had the following tosay: "I can see absolutely no rea-son why people can't stop at STOPsigns and keep their speed at orbelow the speed limit. I have hadseveral close calls in crosswalkshere at SLAC because of peoplewho failed to stop at STOP signs.

The only accident I have had in30 years of driving was here whenI was rear-ended by a speeding

motorcyclist. I support the effortsof the Operating Safety Committeetowards education about on-sitevehicular safety for first offendersand implementation of severesanctions against repeatoffenders."

Underwood also cited an articlein the August 7, 1996, MercuryNews which stated that the nation-wide economic toll of motor vehi-cle crashes was $150.5 billion in1994 alone, at a cost of $580 forevery American.

The Interaction Point © 1996, is published by Stanford Linear Accelerator Center. Editor-in chief,P.A. Moore; Production Editor, Vickee Flynn. Deadline for articles is the first of every month. Items arepublished on a space-available basis and are subject to edit. Information on how to write for The InteractionPoint is available on the World Wide Web at http://wwzv.slac.stanford.edu/pubs/slaconly/tip/tip.html.Submissions may be sent electronically to tip@slac.stanford.edu or by SLAC ID mail to TIP, MS 20.Phone 926-4208.

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a)

ij

A Hobby on a HorseWORKS OF ART don't just hang on walls or sit inmuseum display cases. They may also be itemsused daily, created with attention to detail thatshows the care and pride that went into them. Suchis the case of a project recently completed by SLD'sHoward Rogers.

About a year ago, Howard posted an advertise-ment to commission the making of a western sad-dle. Nick Arias of Document Control answered thead, and a deal was made. With the help ofHoward's "bible," the Encyclopedia of Saddlemakingby Ann and Al Stohlman and advice from his men-tor in Half Moon Bay, Matt Klein, Howard beganthe intricate designing of the saddle. The horse wasfitted, a saddle tree (frame) was built, tooling workwas drawn up with the owner's input, and then theprocess of building the saddle was started. Thework was exacting, calling for patie.nce and atten-tion to detail. Success meant that the saddle was agood fit and the details were exquisite.

Before he starts his next saddle, Howard plans totake a break and return to his hobby of working onsuch items as wallets and guitar straps-which gothim started on this path in the first place.

No to Sex(cont'd. from page 2)

Each year, Dr. Richter publishes an "All HandsMemo" on "Use of SLAC Information Resources"(January 10, 1996 is the most recent memo). Pleaseconsult this document for SLAC specific information.Please be reminded that the Laboratory considers mis-use a serious breach. In order to comply with DOEOrders, we do, indeed, sample network activity andmonitor files on many of our systems.

Meet Sean Brennan of SSRL0 CE A TT 12TP'T\NTnT A TT

Julie Rogers, Experimental Group A, shows off the HowardRogers saddle, as modeled by Lad O' Gold.

The following people joined SLAC during July: LuisArroyo, MFD; Frank Cooper, SSRL; David Cutting,SSRL; Matthew Latimer, SSRL; William MacLean,SCS; Donald Martin, SSRL; and Gabriella Sciolla,Group C.

contamination insilicon chips withcolleagues fromother national labsand industry. Othe]from SSRL includePiero Pianetta,Norikatsu Takura,and Hal Tomkins.

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