Antiproton acceleration in the Main Injector with RF at harmonic number h=28 or h=84

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Antiproton bunches of 1.5 eVs are required for the Tevatron but can not be accelerated through transition in the Main Injector (MI) with the h=588 rf system. Chandra Bhat has developed parameters for h=28 acceleration from 8 GeV followed by h=588 acceleration from 25 to 150 GeV.[1] This note refines the h=28 scenario and also adapts it to the h=84 case needed for 132 ns separation. It is practicable to accelerate the 1.5 eVs {bar p} bunches in about seven seconds with no loss and less than ten percent emittance growth using the existing 2.5 MHz cavities. Both the cycle ... continued below

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51 Kilobytes pages

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MacLachlan, J.A. July 1, 2002.

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Description

Antiproton bunches of 1.5 eVs are required for the Tevatron but can not be accelerated through transition in the Main Injector (MI) with the h=588 rf system. Chandra Bhat has developed parameters for h=28 acceleration from 8 GeV followed by h=588 acceleration from 25 to 150 GeV.[1] This note refines the h=28 scenario and also adapts it to the h=84 case needed for 132 ns separation. It is practicable to accelerate the 1.5 eVs {bar p} bunches in about seven seconds with no loss and less than ten percent emittance growth using the existing 2.5 MHz cavities. Both the cycle time and emittance growth are significantly improved by the scheme described in this note. Excellent results can be obtained for the 7.5 MHz case with only 75 kV except that there is a 0.5 % beam loss. For completely clean 53 MHz capture of the tail produced by shape mismatch at transition, 250 kV is desirable for bunch rotation at 26 GeV.

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51 Kilobytes pages

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  • Other Information: PBD: 1 Jul 2002

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  • Report No.: FERMILAB-TM-2177
  • Grant Number: AC02-76CH03000
  • DOI: 10.2172/795913 | External Link
  • Office of Scientific & Technical Information Report Number: 795913
  • Archival Resource Key: ark:/67531/metadc742808

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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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  • July 1, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • April 1, 2016, 3:36 p.m.

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MacLachlan, J.A. Antiproton acceleration in the Main Injector with RF at harmonic number h=28 or h=84, report, July 1, 2002; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc742808/: accessed April 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.