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HIDE working groups. A. Synchrotron based system

Description: A summary is given of a week's discussions on an ion source to target scenario for a synchrotron for heavy ion fusion. Topics considered include: the number of beams on the target; beam dynamics; and a number of areas explicitly identified as needing further work. (PMA)
Date: January 1, 1977
Creator: Barton, M.Q.
Partner: UNT Libraries Government Documents Department

Interactive Design of Accelerators (IDA)

Description: IDA is a beam transport line calculation program which runs interactively on an IBM PC computer. It can be used for a large fraction of the usual calculations done for beam transport systems or periods of accelerators or storage rings. Because of the interactive screen editor nature of the data input, this program permits one to rather quickly arrive at general properties of a beam line or an accelerator period.
Date: June 30, 1987
Creator: Barton, M.Q.
Partner: UNT Libraries Government Documents Department

Acceleration of heavy ions in the AGS and CBA

Description: A plan has been developed to inject ion beams from the Brookhaven Tandem or a cyclotron added to the Tandem into the AGS. This beam could then be injected into a relativistic heavy ion collider. The availability of many CBA components adds to the attractiveness of this proposal.
Date: January 1, 1983
Creator: Barton, M.Q.
Partner: UNT Libraries Government Documents Department

Acceleration of heavy ions to very high energies

Description: The current interest of physicists in the collisions of heavy ions closes an interesting circle in the technology of accelerator building. The first cyclic accelerator, built by R. Wideroe, was a linear accelerator designed to accelerate potassium ions. Subsequent to Wideroe's achievement, much of the art of accelerator construction has been devoted to creating energetic beams of electrons and protons. Now we find ourselves returning to the heavy ions, and Wideroe's linear accelerator structure still plays an important role in many acceleration schemes. Fortunately, while the particle physics community has concentrated on the electron and proton machines, the nuclear physicists have kept alive the interest in heavy ions. Now a host of electrostatic machines, cyclotrons, and heavy ion linear accelerators provide beams of all species of ions at energies from about 100 MeV per nucleon for light isotopes to 10 MeV per nucleon for the heaviest isotopes in support of vigorous physics programs.
Date: January 1, 1982
Creator: Barton, M.Q.
Partner: UNT Libraries Government Documents Department

Acceleration of heavy ions in the AGS

Description: It is possible to use the Brookhaven AGS as a heavy ion machine by adding a cyclotron to the Tandem and using this combination as injector. An intermediate step for lighter ions might consist of injecting the Tandem beam directly into the AGS. In either case, quite high intensities should be possible.
Date: January 1, 1983
Creator: Barton, M.Q.
Partner: UNT Libraries Government Documents Department

Heavy-ion collisions in a collider at BNL

Description: Heavy ions accelerated in the AGS can be injected into CBA providing colliding beams up to 400 Q/A GeV/amu. Luminosities approaching 10/sup 28//cm/sup 2/sec should be achievable even though the ions must be accelerated through phase transition. More current might be stacked by using a special ..gamma../sub T/ jump method to avoid the excessive radial aperture usage at transition.
Date: January 1, 1983
Creator: Barton, M.Q.
Partner: UNT Libraries Government Documents Department

TIME DEPENDENCE OF SPACE CHARGE BEAM LOSSES IN THE COSMOTRON

Description: An investigation was made of Cosmotron intensity versus time through the entire time interval from the beginning of injection to the completion of r-f capture. The induction electrode signal was used for the instartaneous measurement of beam intensity. Oscilloscope displays of the signal were photographed and traced. Base lines were filled in on the tracings and the area of the pulses measured with a polar pianimeter. It was found that the relation losses of beam intensity increase with injection intensity (total injected charge), and that most of the losses take place in the time interval between the end of injection and the completion of the first synchrotron oscillation. (M.C.G.)
Date: January 1, 1962
Creator: Barton, M.Q. & Sacharidis, E.J.
Partner: UNT Libraries Government Documents Department

SYNCHROTRON OSCILLATIONS

Description: Numerical calculations were done which permit the deduction of many properties of the synchrotron oscillation problem. A review of the formulation framework to which the results are to be fitted is given. These are worked out for an arbitrary circular accelerator. The algebra would have to be modified slightly to include straight sections, but the numerical results are still useful. (J.R.D.)
Date: May 1, 1962
Creator: Hochman, E.H. & Barton, M.Q.
Partner: UNT Libraries Government Documents Department

Field errors in superconducting magnets

Description: The mission of this workshop is a discussion of the techniques for tracking particles through arbitrary accelerator field configurations to look for dynamical effects that are suggested by various theoretical models but are not amenable to detailed analysis. A major motivation for this type of study is that many of our accelerator projects are based on the use of superconducting magnets which have field imperfections that are larger and of a more complex nature than those of conventional magnets. Questions such as resonances, uncorrectable closed orbit effects, coupling between planes, and diffusion mechanisms all assume new importance. Since, simultaneously, we are trying to do sophisticated beam manipulations such as stacking, high current accelerator, long life storage, and low loss extraction, we clearly need efficient and accurate tracking programs to proceed with confidence.
Date: January 1, 1982
Creator: Barton, M.Q.
Partner: UNT Libraries Government Documents Department

Report of the second workshop on synchrotron radiation sources for x-ray lithography

Description: The reported workshop is part of an effort to implement a US-based x-ray lithography program. Presentations include designs for three storage rings (one superconducting and two conventional) and an overview of a complete lithography program. The background of the effort described, the need for synchrotron radiation, and the international competition in the area are discussed briefly. The technical feasibility of x-ray lithography is discussed, and synchrotron performance specifications and construction options are given, as well as a near-term plan. It is recommended that a prototype synchrotron source be built as soon as possible, and that a research and development plan on critical technologies which could improve cost effectiveness of the synchrotron source be established. It is further recommended that a small number of second generation prototype synchrotrons be distributed to IC manufacturing centers to expedite commercialization. (LEW)
Date: January 1, 1986
Creator: Barton, M.Q.; Craft, B. & Williams, G.P. (eds.)
Partner: UNT Libraries Government Documents Department

Studies of the Rapid Beam Ejector at the Cosmotron

Description: Extraction of the external beam of the cosmotron with maximum efficiency and minimum duration for measurements of the magnetic moment of the lambda hyperon requires addition of a rapid beam ejector (RBE). Early experiments with the RBE give lower ejection efficiency than the standard ejection system. Reconstruction of the RBE with lengthening of the rise time of the system gives improved values. Computer studies that involve solving the equation of motion for the radial betatron oscillation with time increasing perturbation in one section yield information on particle distributions and result in increases of the turn spacings in RBE to prevent betatron oscillation distribution distortions. Ejection efficiency is now the same with and without the RBE. (D.C.W.)
Date: January 16, 1963
Creator: Barton, M. Q.; Kernan, W.; Novey, T.; Warshaw, S. & Wattenberg, A.
Partner: UNT Libraries Government Documents Department