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Model drs wortzel practices a chow were all home USSR to the coming months they be seeking out senior theorists, with a competence and eminence similar to 's, to come to Fermilab during the next years, a spokesman said. On accepting the new assignment Quigg stated: When I came to the Laboratory, important attraction was the opportunity to make a commitment to the institution and to help mold a theoretical physics group of eminence. During the last three years those aspirations have begun to seem easily within our reach. What has been extremely rewarding to me is the development of a cohesion among group members, and a common sense of purpose. Under 's leadership, and by his example, Fermilab Theoretical Physics has been a collegial search for nature's secrets. There is every reason to believe that we can complete the task began. Prior to joining Fermilab Quigg was professor of physics at Stony He received his Ph.D. from Berkeley 1970. He has served on the SLAC and BNL Program Advisory committees. Since 1974 he has also been a visiting scholar at the University of Chicago. Quigg and his wife, Elizabeth, a member of the Computing Department, live Wheaton. They have 2 children, four and one. Source: The Village Crier Vol. 9 No. 26, July 7 Cosmic rays. The words bring to mind visions of outer space, spaceships and Flash Gordon-type action adventures. Actually, cosmic rays are mysterious sub-microscopic particles. Their origins space are unknown, but the average person is exposed to about 500 cosmic particles daily. A new Fermilab exhibit enables employees and the public to cosmic rays arriving. The display is called a spark chamber. Installed on the 15th floor north observation area, the display gets its name from sparks that are seen when cosmic rays are detected. It resembles a six-foot-tall black plastic box, with windows on two sides. The chamber's inner workings are illuminated when a visitor pushes X button. Muzaffer Atac, detector development group head Research Services, created the display. He said its purpose is to give non-scientists a better understanding of Fermilab's research. He noted that spark chambers are detectors that physicists use to record results and learn about processes taking place deep inside the atom's nucleus. addition, other uses range from x- and gamma- astronomy, to nuclear medicine and biology, to radioactive studies and even archaeology. Other types of detectors used at Fermilab include drift chambers, proportional wire chambers and bubble chambers. Momentum resolution, data rate expected and estimated cost determine which type of detector be built for individual experiment, he said. The new display was constructed with materials borrowed from Argonne National Laboratory, courtesy of Romanowski, former high energy physics department head. Several months' part time work by Atac, technicians J. Urish, M. Hrycyk, W. artist Gonzales and the model shop went into the project. Aluminum foils 0-inch thick are stretched and positioned on plastic frames. The thin aluminum foils serve as electrodes for each of 20 spark chamber gaps. The active area of each chamber is 20 x 40 inches. atmosphere of 90% neon and 10% helium fills the gaps. Long plastic scintillators, light detectors, are placed above and below the frames. When a or rays passes through the scintillators, a circuit produces electronic signal. This triggers a high voltage pulser and 6 volts is applied to the chambers. The electric field accelerates electrons created during the cosmic rays' passage through the chamber. Electrons then colliding with neon-helium atoms produce a ZAP and orange spark resembling a mini-lightning bolt. The whole process lasts less than one millionth of a second! The new display joins optical electronic spark chamber on view the atrium lobby since 1975. Brief non-technical texts attached on both exhibits explain cosmic rays, detectors used physics and operating information. Source: The Village Crier Vol. 9 No. 28, July 21 Tollestrup has joined the Fermilab staff as a physicist the Energy Doubler Saver Group. Tollestrup also assume responsibility for a new group the Research Division's Department of Research Services, That group be responsible for carrying on research and development on electronic detectors and data acquisition techniques. For the past two years Tollestrup has been serving as a member of the Energy Doubler Saver Group. He joined the Laboratory a temporary capacity while on sabbatical leave and leave of absence