Proposed NAL future projects

Topics are selected for discussion from all the study efforts in the four week summer study of the National Accelerator Laboratory organized by the suggestion of long range planning committee. Energy doubler, e-p and p-p colliding-beam storage rings, and new experimental areas and detectors are discussed. The energy doubler is a ring of relatively slow pulsed superconducting magnets mounted on the ceiling of a main ring tunnel near apex so that beam orbit is some 3 feet above mainring orbit. The field can be ramped to 45 kG corresponding to the peak proton energy of 1 TeV. The cross-section of dipole and the coil being assembled for a 20-ft long prototype dipole are shown. Two dipoles in the doubler corresponding to those following medium straight section in the main-ring are moved upstream by the length of two dipoles. The medium straight section is used for injection. The energy doubler project is expected to serve the very important function of developing the technology of the large scale application of superconducting magnets to accelerator system. The goal at National Accelerator Laboratory is envisioned to be superconducting 1 TeV x 1 TeV p-p rings with a conventional magnet ring installed in the same tunnel for e--p, e--e+, and e+-p colliding beams. For the design of main-ring proton beam current of 0.4A at 400 GeV, and electron beam current of 1A at 3 GeV, luminosity of approximately 3 x 1031 cm-2sec-1 is obtained. To properly utilize 1 TeV protons made available by the energy doubler, a new experimental area was proposed. (Iwakiri, K.)