Main Ring Cycle Time Limitations and Multi-Batch Operation

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This note is a compilation of comments on the limitations on the Main Ring cycle time, and multi-batch operation of the Main Ring. The first page is a summary of three talks given in january 1986 by the authors about limitations to Main Ring cycle rates and the possibilities for multi-batch targeting schemes. Following this is a writeup by Stan pruss on the Main Ring cycle time limitations. This is followed in turn by some comments by G. Dugan on the general topic, from the pbar Source perspective. The basic conclusions of the talks are: (1) The main ring should ... continued below

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42 pages

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Dugan, G.; /Cornell U., Phys. Dept.; Martin, P.; Pruss, S. & /Fermilab February 1, 1986.

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Description

This note is a compilation of comments on the limitations on the Main Ring cycle time, and multi-batch operation of the Main Ring. The first page is a summary of three talks given in january 1986 by the authors about limitations to Main Ring cycle rates and the possibilities for multi-batch targeting schemes. Following this is a writeup by Stan pruss on the Main Ring cycle time limitations. This is followed in turn by some comments by G. Dugan on the general topic, from the pbar Source perspective. The basic conclusions of the talks are: (1) The main ring should be able to ramp to 120 GeV with a cycle time of less than 2.15 sec, with existing hardware. The principal limits are due to voltage limitations on the MR power supplies, both on the upgramp and on invert, and RF bucket area limitations. The magnet cooling is adequate to run at 120 GeV DC. (2) Bunch narrowing techniques for multiple batch operation, with up to 4 batches on flat top, is possible with the existing hardware and results in a very small ({approx} 3%) longitudinal emittance dilution per batch. This conclusion does not include the effects of instabilities, if any. Although the optimum bunch length with multiple batches will be wider than with one batch, this is not a large effect and probably is of no significance for the pbar yield (although this should be checked). (3) With a small modification to the existing hardware, the E17 kicker can be upgraded to allow operation with 3 batches on the flat top. Some additional effort (which is planned) will be required to allow four batches, beyond this point, major effort (not planned at present) will be required.

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42 pages

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  • Report No.: FERMILAB-PBAR-NOTE-453
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/984625 | External Link
  • Office of Scientific & Technical Information Report Number: 984625
  • Archival Resource Key: ark:/67531/metadc1012711

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 1, 1986

Added to The UNT Digital Library

  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 24, 2017, 2:33 p.m.

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Dugan, G.; /Cornell U., Phys. Dept.; Martin, P.; Pruss, S. & /Fermilab. Main Ring Cycle Time Limitations and Multi-Batch Operation, report, February 1, 1986; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc1012711/: accessed October 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.