The second Advanced Study Institute (ASI) on Techniques and Concepts of
High Energy Physics was held at the Roaring Brook Resort at Lake George,
New York. As in the case of the first ASI, our aim was to bring together
a small group of promising young ex- perimenters and several outstanding
senior scholars in high energy physics in order to learn about the
latest trends in the field and develop stronger contacts among
scientists from different countries and different backgrounds. The
setting at Roaring Brook was particularly congenial and the staff, under
the direction of George Green, was both friendly and efficient. The ASI
was supported mainly through funds provided by the Scientific Affairs
Division of NATO. It was cosponsored by the U. S. Department of Energy,
Fermilab, the National Science Founda- tion and the University of
Rochester. A special grant from the Oliver S. and Jennie R. Donaldson
Charitable Trust provided a valuable degree of flexibility for
supporting worthy students. The scientific program of this ASI was, once
again, designed primarily for advanced graduate students and recent Ph.D
recipients in experimental particle physics. I believe, however, that
the contents of the present volume will prove useful to an even wider
audience of physicists.