JADE Experiment at PETRA

In 1975 the construction of a new electron-positron collider PETRA started at DESY. The physicists at HEPL, University of Tokyo, while they were still continuing the DASP experiment, proposed and designed an experiment at PETRA together with the Heidelberg group. They organized an international collaboration JADE (which stands for Japan, Deutschland, and England).

In 1977 the JADE experiment was approved. To take the responsibility of the experiment, a new laboratory, the Laboratory of International Collaboration on Elementary Particle Physics (LICEPP), was started in Faculty of Science, University of Tokyo, with a term of seven years, and replaced HEPL.

The JADE Lead-Glass Detector
The JADE Lead-Glass Electromagnetic Shower Detector

The detectors were designed to cover large solid angles so that they should not miss any interesting events. The lead-glass electromagnetic shower detector, which LICEPP was in charge of, operated stably without losing its quality of performance. Together with the central tracking detector, it was indispensable in most of the physics analyses.

The 5 year operation of the experiment since 1979 resulted in the following important achievements:

Many physicists, who worked in the JADE experiment, later participated in the TRISTAN experiments at the KEK laboratory in Japan. It is generally believed that their experiences with JADE had partially contributed to the success of TRISTAN.

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