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Title: A beam sweeping system for the Fermilab antiproton production target

Abstract

In the Main Injector era beam intensities high enough to damage the antiproton production target will be available. In order to continue to operate with a tightly-focused primary beam spot on the target, and thus maintain yield, it will be necessary to spread the hot spot on the target by use of a beam sweeping system. This report summarizes the requirements for such a system, and addresses the issues involved in the design of a sweeping system.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10187116
Report Number(s):
FNAL-TM-1857
ON: DE94000589; TRN: 93:021928
DOE Contract Number:
AC02-76CH03000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Aug 1993
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANTIPROTON BEAMS; BEAM PRODUCTION; BEAM INJECTION; ENERGY DEPOSITION; DESIGN; ION BEAM TARGETS; 430303; EXPERIMENTAL FACILITIES AND EQUIPMENT

Citation Formats

Bieniosek, F.M. A beam sweeping system for the Fermilab antiproton production target. United States: N. p., 1993. Web. doi:10.2172/10187116.
Bieniosek, F.M. A beam sweeping system for the Fermilab antiproton production target. United States. doi:10.2172/10187116.
Bieniosek, F.M. Sun . "A beam sweeping system for the Fermilab antiproton production target". United States. doi:10.2172/10187116. https://www.osti.gov/servlets/purl/10187116.
@article{osti_10187116,
title = {A beam sweeping system for the Fermilab antiproton production target},
author = {Bieniosek, F.M.},
abstractNote = {In the Main Injector era beam intensities high enough to damage the antiproton production target will be available. In order to continue to operate with a tightly-focused primary beam spot on the target, and thus maintain yield, it will be necessary to spread the hot spot on the target by use of a beam sweeping system. This report summarizes the requirements for such a system, and addresses the issues involved in the design of a sweeping system.},
doi = {10.2172/10187116},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 1993},
month = {Sun Aug 01 00:00:00 EDT 1993}
}

Technical Report:

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  • The problems arising from targeting high intensity small-sigma proton pulses for antiproton production can be reduced by the beam sweeping on the target. The presented results of analytical estimations and of the full-scale Monte Carlo studies indicate a significant efficiency of diluting the beam energy deposition. These results are useful to obtain optimum design parameters for various magnetic elements to be put in at the upstream end of the target to develop a beam sweeping system. 8 refs., 4 figs., 1 tab.
  • Production of 8-GeV antiprotons in the Fermilab Tevatron I project will utilize 120-GeV protons from the Main Ring. The Target Station consists of an entrance collimator, the target itself, a pulsed lithium lens for anti proton collection, a pulsed magnet for the separation of the 8-GeV secondaries, and a beam dump. These components are mounted on vertical modules within the Target Service Building. Allowance has been made for future improvements to increase the collected anti proton flux. The design of the Target Station and its components is discussed.
  • The objectives of this project are two fold: (1) To extract high energy protons from the Main Ring (MR) and target them to produce antiprotons which are subsequently captured in the existing Booster accelerator; and (2) to provide a channel for injecting either protons or antiprotons into the MR from the booster in a direction opposite to that of the normal proton acceleration as colliding beams can be created. The present design, therefore, is in support of two separate larger projects, viz., the collisions of protons in the Tevatron (normal circulation direction) with 'reverse injected' protons in the MR, andmore » the collision of normal direction protons with reverse injected antiprotons either in the MR or in the Tevatron. Figure 1 shows the layout of the project area. It spans the shortest distance between possible injection/ejection points in the existing accelerator structures, hence minimizing costs. The tunnel will lie underground at the level of the MR and booster.« less
  • It is shown that techniques combining target orientation with focusing lens permit production of bursts of radiation from targets having time durations in the 10/sup -//sup 1//sup 0/ sec region. Applications to Van de Graaff positive ion beams in the Mev energy region are discussed. (D.L.C.)
  • A lithium lens will be used to focus the 120 GeV proton beam on the antiproton production target to a spot size of about 0.1 mm, as part of the planned upgrade to the FNAL antiproton source target station. Improved focusing increases antiproton yield and corrects for possible future emittance dilution of the incident proton beam. The lens, with a radius of 3 mm and length of 8 cm, is expected to operate at a gradient of 2667 T/m and a current of 120 kA. The lens is similar in design to the antiproton collection lens.