February 1970

C ENTER FEBRUARY 26, 1970 VOL. 1 NO. I STANFORD LINEAR ACCELERATOR CENTER FEBRUARY 26, 1970 Am, AMMM w VA %nru %; Pompidou & Party Arrive At Ten Georges Pompidou, President of the counsellors, diplomatic advisers, protocol French Republic, will visit SLAC on and press and information service Friday morning, February 27, arriving at personnel. Emil, "Buzz" Mossbacher, Jr., approximately 10:00 a.m. Weather President Nixon's Chief of Protocol, will permitting, the President and his official also be with the official French party party will come from San Francisco to arriving from the east and Andre Batault, SLAC by helicopter, landing on the lawn Consul General of France from the San behind the A &E Building. Francisco Consulate will join the party for the tour of SLAC. Although a number The President will be met by of the French delegation, including Stanford's Vice-President and Provost President Pompidou, are accompanied by Richard Lyman, acting for President their wives, the ladies will not be coming Kenneth S. Pitzer who is attending a on the visit to SLAC but have elected, conference in Buenos Aires, Argentina, instead, to spend the morning resting in and by W. Palmer Fuller, III President of San Francisco. Stanford's Board of Trustees, and Professor Panofsky. Others in the SLAC Following the SLAC visit, the greeting party will include Congressman President and his party will return to San Pete McCloskey of San Mateo County, Francisco for a luncheon being given by A.E.C. Commissioner Theos Thompson, the Commonwealth Club at the Fairmont Professor Victor Weisskopf of MIT and Hotel where Pompidou is expected to former head of CERN in Geneva, deliver an address on the problems of Switzerland, Professor Sydney Drell, youth. Following an afternoon of SLAC's Deputy Director, and Dr. Greg sight-seeing in San Francisco, President Loew, Head of the Accelerator Physics and Madame Pompidou will hold a Department who has been in charge of reception at the Palace of the Legion of the logistics for the visit. Honor near San Francisco's Presidio. The and other After the brief welcoming ceremony, Stanford and SLAC officials be taken U.S. members of the SLAC greeting party the President and his party will grtoup have been on a 45-minute tour of the facility. This and tour arrangement will be followed by an informal briefing invited to the reception. of the President by Professors Weisskopf Prior to his arrival in San Francisco, and Panofsky and by Provost Lyman. Dr. President Pompidou will have spent two Weisskopf is expected to discuss trends in and a half days in Washington, D.C., high energy physics and the proposed conferring with President Nixon, various 300-BeV future CERN accelerator and members of the Cabinet and other European national accelerators. Dr. Congressional leaders. Tuesday, he gave a Panofsky will discuss the funding of luncheon speech at the National Press Georges Pompidou, President of the French Republic and Successor to Charles de Gaulle research in Europe and the U.S., and Club, and Wednesday, he addressed Provost Lyman will describe Stanford Congress. The President and Madame University as a private institution, the Pompidou gave a dinner in honor of decision making process in the University, President and Mrs. Nixon at the French and the interaction between University Embassy Wednesday night. This morning, SLAC &MIT Collboration Administration, the Board of Trustees, after visiting Arlington National Faculty and students. Cemetery where he placed a wreath on Others in the official party travelling the Tomb of the Unknown Soldier, Studies Proton Structure from Washington, D.C. and Cape President Pompidou conferred further Kennedy, Florida, where President with President Nixon at the White House SLAC (Group A) and MIT scientists WITHIN the proton itself. It was found Pompidou will have been visiting the day prior to the farewell ceremony and his are now doing an experiment probing the that when the colliding electron gave off before his arrival in San Francisco, departure from Washington. This internal structure of the proton and the an appreciable fraction of its energy to a include French Foreign Minister Maurice afternoon he will visit NASA installations neutron by taking the SLAC high-energy target proton (the process called Schumann, Charles Lucet, the French at Cape Kennedy where he will take part electron beam and causing it to interact "inelastic scattering" by physicists), the Ambassador to the United States, various in an exercise in weightlessness and a with the neutrons and protons making up probability of the rebound electron being simulated Moon walk. He will arrive in a liquid deuterium target. The target is deflected ("scattered") into angles at San Francisco sometime this evening. located at the common pivot of the three which the 20 and 8 GeV spectrometers End Station A spectrometers. The pattern were set diminished only very slowly as Logistics For Saturday, the Presidential party leaves made by the electrons provides a glimpse the momentum transferred from the for Chicago where they will spend the into the inner structure of these target electron to the proton during the day with the President meeting with city particles. interaction increased. and architects. Sunday, the Pompidou planners The present experiment will be Physicists interpret, this group will fly on to New York. On momentum-transfer variable physically as For reasons of both personnel safety will visit the UN running through the March operating Monday, the President 320 of the a measure of the sensitivity with which and for security during the time of Secretary General U Thant will cycle and will be requiring where pulses of electrons per the interaction is being observed. The iresident Pompidou's visit to SLAC, the a luncheon in his honor. After a accelerator's 360 give second at an intensity limited only by the higher the momentum transfer, the more area bounded by the Auditorium/Cafe- meeting with members of the Business sensitive the probe. As probe sensitivity teria, the A & E Building, the Central for International Understanding accelerator's capability. The electron Council to 20.5 increases, the targets being probed should Laboratory, and the Test Lab will be and with TV networks on Tuesday energies required vary from 4.5 billion electron volts (GeV). Dr. Richard appear more and more diffuse - the roped off and closed to all foot traffic morning, the Presidential party departs proton should begin to appear more like from approximately 9:45 to 11:30 a.m. for Paris Tuesday afternoon. Taylor of Group A is spokesman. This experiment is a follow-up to a cotton candy than like a hard, on Friday the 27th. The rope barrier will But the lack of Although President Pompidou is the series of experiments done in mid-1968 impenetrable sphere. also extend along the open end of the rapid scattering probability decrease SLAC quadrangle toward the Sand Hill first head of state to visit SLAC while in and reported recently. These earlier LeFevre, the former experiments and their results, which were indicates, in one model at least, that our Road entrance. power, Theodore with Prime Minister of Belgium also visited the attainable only at SLAC because of the cotton candy might be stuffed Road blocks will also be in position of 1967 while a uniqueness of the high-energy electron impenetrable raisins. These point-like, project in the summer partons. across the perimeter road immediately to to the UN. Also, Atomic beam and the precision associated with non-diffuse objects are called special delegate way to describe the west of the Auditorium parking lot Energy Commission heads from various the spectrometers, excited the But this is not the only and directly to the east of the Sand Hill Dr. Robert Hirsch of imagination of the physics community. the data. nations, including model is the Road entrance. These will go up at France and several iron curtain countries The experiments indicate the possibility A less spectacular Continued on pagpe have visited SLAC in the past. of point-like substructures existing Continued on page 4 mm Am tsu,draw c . .5cattere aser earn. roves ec ive a few significant results of physics with 1011 electrons to yield Recently, The ruby laser can be experiments made possible by the SLAC thousand photons. laser beam facility have flashed only every two seconds because back-scattered spread in been reported. Examples of these were of heating effects. The energy Wolf at the SLAC the small, selected high energy photon given by Gunther is 95% Particle Physics Seminar of February 9th. beam is 2% and the beam known since 1963, has polarized. The technique, output of the been brought to a highly usable state by Because of the small LASER (Bldg 405) x ELECTRON INTERACTION LASER PHOTON BEAM , REGION GHT BEAM i BEAM TO 82" BUBBLE Stanford uommunny tmiuren s tuinuir m 1-11 1luluiull a v···Wi uvualvuniff, I · - CHAMBER MAGNET MAGNET MIRROR M SYSTEM SYSTEM IJMASSIVE ELECTRON SHIELDING DUMP Child Care Center Status By Glenda Jones entire Stanford community. BEAM SWITCHYARD I RESEARCH YARD The SLAG Child Care Association has I Since June 1969 when SLAC continued its work on getting a center (NOT TO SCALE) employees first gathered to form the here where we work. There's a big Child Care Committee, much has been difference between "on-site" child care accomplished towards establishing a and leaving your kids miles from where SLAC BACKSCATTERED LASER FACILITY 155 Center for the children of the SLAG you work. If your child needs you in a community. We met weekly during the hurry, you are there. You can have lunch research and investigating together if you want.

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