Conceptual Design of a 400-GeV Version of ISABELLE.
Conceptual Design of a 400-GeV Version of ISABELLE.

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Published: 1977

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A conceptual design report is given for 400 x 400 GeV proton-proton storage rings. A facility is described with twice the energy capability of the recently proposed ISABELLE. The basic accelerator lattice was modified so that the circumference of the magnet rings can be increased substantially without an increase in the transition energy. Each 400 GeV ring uses superconducting magnets of the type described in the ISABELLE Proposal, but energized to 50 kG. Other technical features are not significantly different from the 200 GeV design, and are described. The beams will collide in six interaction regions where up to 60 m of space is available for the installation of experimental equipment. The research possibilities that are provided by the increased center-of-mass energy are briefly described. Finally, a cost estimate of 238 million dollars for the research facility is outlined. This is nearly 40% more than the cost of the 200 GeV ISABELLE, but this facility would provide twice the energy available for exploring new regions of high energy physics.

Design of a 400--400 GeV2 Version of ISABELLE.
Design of a 400--400 GeV2 Version of ISABELLE.

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Published: 1977

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An extrapolation of the ISABELLE 200-200 GeV2 proton--proton storage rings to higher energy was studied, and the conceptual design is presented for a 400-400 GeV2 version. The basic storage ring structure was so modified that the circumference of the rings could be substantially increased without an increase of the transition energy. Because of the now well established microwave longitudinal bunched beam instability, this is essential in maintaining a viable longitudinal impedance limit for the overall structure. The principal parameters for the 400 GeV structure are given and compared with the basic 200 GeV design. Performance limitations, where they may differ from the 200 GeV design are indicated. Each 400 GeV ring uses superconducting magnets essentially identical to those employed in the 200 GeV design, but energized to 50 kG peak field. The justification for this is given together with other technical features differing from the basic design. It is concluded that for a cost increase of 40% over the basic p--p storage ring design, twice the center-of-mass energy could be provided for the ISABELLE proton--proton colliding beam facility.

Design of a 400--400 GeV/sup 2/ Version of ISABELLE.
Design of a 400--400 GeV/sup 2/ Version of ISABELLE.

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Published: 1977

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An extrapolation of the ISABELLE 200-200 GeV/sup 2/ proton--proton storage rings to higher energy was studied, and the conceptual design is presented for a 400-400 GeV/sup 2/ version. The basic storage ring structure was so modified that the circumference of the rings could be substantially increased without an increase of the transition energy. Because of the now well established microwave longitudinal bunched beam instability, this is essential in maintaining a viable longitudinal impedance limit for the overall structure. The principal parameters for the 400 GeV structure are given and compared with the basic 200 GeV design. Performance limitations, where they may differ from the 200 GeV design are indicated. Each 400 GeV ring uses superconducting magnets essentially identical to those employed in the 200 GeV design, but energized to 50 kG peak field. The justification for this is given together with other technical features differing from the basic design. It is concluded that for a cost increase of 40% over the basic p--p storage ring design, twice the center-of-mass energy could be provided for the ISABELLE proton--proton colliding beam facility.

ISABELLE
ISABELLE

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Published: 1978

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A conceptual design report is presented for the construction of an Intersecting Storage Accelerator, ISABELLE, to be located at Brookhaven National Laboratory. At this major research facility beams of protons with energies up to 400 GeV will be collided in six experimental areas. At each area particle physicists will install detector apparatus to study the interaction and reaction products for such very high energy collisions. The proposal results from several years of study and development work on such a facility. Topics discussed include: (1) introduction and summary of the proposal; (2) physics at ISABELLE (including physics objectives and typical experiments and detectors); description of ISABELLE (overview; magnetic ring structure and lattice characteristics; performance; beam transfer, stacking, and acceleration; magnet system; refrigeration system; vacuum system; power supplies, instrumentation, and control system; physical plant and experimental halls; and operation and safety); and (3) cost estimate and schedule.