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successfully carried out in two test beams which operated parasitically during the fixed target physics run. Extensive studies and commissioning work were also carried out using the Fermilab Antiproton Accumulator ring in a new mode of operation in which it can provide a beam of antiprotons for a fixed target experiment when not needed for the collider physics program. In summary, we have just concluded the most productive and successful fixed target operating period ever conducted at Fermilab.

In 1987, the Stanford Linear Accelerator Center's ability to study collisions of electrons with positively charged particles (positrons) significantly increased with the completion of the Stanford Linear Collider (SLC) project. Beam testing and tune-up are in progress now. Initial operation for research, at a reaction energy of 94 GeV, is expected to begin very soon. The higher energies available in the SLC will enable scientists to conduct important new experiments, particularly with regard to the electroweak force. In preparation for first collisions of 47 GeV electrons and positrons, the upgraded Mark II Detector was installed in the SLC interaction region and tested with cosmic rays during 1987. It is now ready to capture results of collisions in the SLC's unprecedented electron-positron energy range.

Substantial progress was made in the fabrication of the Stanford Large Detector (SLD) during 1987. The SLD is a full-scale detector, designed specifically to optimize the physics output from the electron-positron collisions in the SLC.

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At Brookhaven National Laboratory the major technical design and the conventional construction design efforts for the Alternating Gradient Synchrotron (AGS) Accumulator/Booster were completed and the tooling and initial procurements for the 202-meter ring of beam-bending magnets began. This additional particle injector to the AGS will increase the intensity of both the AGS proton beams by 400 percent and the intensity of polarized proton beams by 2000 percent. This enhancement will permit researchers at Brookhaven to explore previously inaccessible areas of the subatomic world and will significantly increase the rate of data collection.

FY 1989 HIGH ENERGY PHYSICS BUDGET REQUEST

The FY 1989 request for the research portion of High Energy Physics is $220.4 million. Of the total amount, $144.9 million is for Operating Expenses, $66.1 million is for Capital Equipment and $9.4 million is for Construction (Tables 3 & 4). This request falls under the General Science and Research appropriation. I will discuss the Basic Research User Facilities request for High Energy Physics and for the Superconducting Super Collider after I describe the budget request for our High Energy Physics research program.

The Operating Expenses request supports university and laboratory research groups who carry out experimental and theoretical research in high energy physics as well as detector R&D studies to develop new and advanced concepts and technologies. FY 1988 will be a year of strong research output from the new Tevatron and SLC colliders and new Tevatron fixed target capabilities.

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Research activity planned for FY 1989 is expected to be very productive as the data collected in FY 1988 are analyzed and these new facilities operate in an intensive data-taking mode.

The FY 1989 High Energy Physics Capital Equipment request of $66.1 million will provide the particle detection apparatus and data analysis systems essential to forefront high energy physics research. In FY 1989, priority will be given to continued progress on the fabrication of the SLAC Large Detector for the Stanford Linear Collider and the D-Zero Detector for the Tevatron collider. With this continued progress, first physics research with these detectors is planned to be started early in FY 1990 and the detectors can be completed by the end of FY 1990.

The FY 1989 Construction request is $9.4 million. This request includes final funding for the central computing upgrade at Fermilab ($3.6 million) which is scheduled to be completed in 1989. This upgraded computing capability is required to analyze the large volume of new physics data coming from the Tevatron program. This request also provides $5.8 million for General Plant Projects at Brookhaven National Laboratory which are required to keep the

general plant (e.g., buildings, roads and utilities) in good operating condition.