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Intense pulsed neutron source accelerator status

Description: The Intense Pulsed Neutron Source (IPNS) facility has been in operation since November 1, 1981. From that date through August 1, 1983, the accelerator system was scheduled for 7191 hours of operation. During this period, 627 million pulses totaling about 1.1 x 10/sup 21/ protons were delivered to the spallation target. The accelerator has exceeded goals set in 1981 by averaging 8.65 ..mu..A over this two year period. This average beam current, while modest by the standards of proposed machines, makes the IPNS synchrotron (Rapid Cycling Synchrotron (RCS)) the highest intensity proton synchrotron in the world today. Detailed data on accelerator operation are presented. Weekly average currents of 12 ..mu..A have been achieved along with peaks of 13.9 ..mu..A. A great deal has been learned about the required operating constraints during high beam current operation. It should be possible to increase the average beam current during this next year to 12 ..mu..A while observing these restraints. Improvement plans have been formulated to increase the beam current to 16 ..mu..A over the next three years.
Date: January 1, 1983
Creator: Potts, C.W.; Brumwell, F.R. & Stipp, V.F.
Partner: UNT Libraries Government Documents Department

Status report on the Rapid-Cycling Synchrotron

Description: The Rapid Cycling synchrotron (RCS), originally designed as an injection energy booster for the Zero Gradient Synchrotron (ZGS), operated under constraints imposed by ZGS operation until December 1979. Once these restraints were removed, the RCS made rapid strides toward its near-term goals of 8 ..mu..A of protons for Argonne National Laboratory's Intense Pulsed Neutron Source program. Reliable 30-Hz operation was achieved in the spring of 1980 with beams as high as 2 x 10/sup 12/ protons per pulse and weekly average intensities of over 6 ..mu..A on target. These gains resulted from better injections matching, more-efficient RF turnon and dynamic chromaticity control. A high-intensity small-diameter synchrotron, such as the RCS, has special problems with loss control which dictate prudence during intensity-improvement activities. The studies and equipment leading to the intensity gains are discussed.
Date: January 1, 1981
Creator: Potts, C.W.; Brumwell, F.R.; Cho, Y.; Rauchas, A.V. & Volk, G.J.
Partner: UNT Libraries Government Documents Department

Status of the intense pulsed neutron source

Description: Fortunately in spite of some premature reports of its impending demise, IPNS has passed the fourth anniversary of the first delivery of protons to the targets (May 5, 1981) and is approaching the fourth anniversary of its operation as a scattering facility (August 4, 1981). On June 10, 1984, the RCS delivered its one billionth pulse to the IPNS target - the total number of protons delivered to the targets amounted then to 75 stp cm/sup 3/ of H/sub 2/ gas. Since startup IPNS has improved steadily in terms of the performance of the Rapid Cycling Synchrotron, the source and its moderators and the scattering instruments, and a substantial and productive user program has evolved. This report summarizes the current status of the Intense Pulsed Neutron Source at Argonne National Laboratory. We include reference to recent accelerator operating experience, neutron facility operating experience, improvements to these systems, design work on the ASPUN high-current facility, booster target design, the new solid methane moderator, characterization of the room temperature moderators, and provide some examples of recent results from several of the spectrometers.
Date: January 1, 1985
Creator: Carpenter, J.M.; Brown, B.S.; Kustom, R.L.; Lander, G.H.; Potts, C.W.; Schulke, A.W. et al.
Partner: UNT Libraries Government Documents Department

High energy polarized deuterons at the Argonne National Laboratory zero gradient synchrotron

Description: Modifications made on the ZGS to allow the acceleration of polarized deuterons and the operational experiences with the first production run with this beam are described.
Date: January 1, 1979
Creator: Parker, E.F.; Brandeberry, F.E.; Crosbie, E.A.; Knott, M.J.; Potts, C.W.; Ratner, L.C. et al.
Partner: UNT Libraries Government Documents Department