205 research outputs found
Determining β * in the Tevatron
No full textAbstract Using the two additional Beam Position Monitors (BPM's) found on either side of one of the Interaction Points (the so-called Collision Point Monitors), one can determine, in principle, the single-turn matrix for one BPM location or the other and, hence, the lattice functions at that location. Once the amplitude function and its slope at one BPM is found, it is straight forward to compute the amplitude function through the collision hall and the location of its minimum, and the value of the function at the collision point (β * )
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Lattice/beam dynamics working group. Summary report
No full textThe Lattice/Beam Dynamics Working Group was charged with reviewing and identifying technical issues and their potential solutions for (a) a 2 x 2 TeV high luminosity p-pbar collider, and (b) a 30 x 30 TeV high luminosity pp collider. Rather than attempting to solve very specific problems for these devices in the relatively short time scale of a workshop, the group attempted to look at more general questions to try to indicate in which directions future work in these areas should proceed. The emphasis of the group tended toward lattice issues and general accelerator design issues for the above two cases, with more specific questions being addressed as directed by the needs seen by the Workshop Synthesizers
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A report on the Indiana University Workshop on future U.S. hadron facilities
No full textIn July 1994 a workshop was held at Indiana University to study and discuss options for future hadron collider facilities in the United States, and to identify related R&D programs. The workshop was conducted under the auspices of the Accelerator Physics, Technologies, and Facilities Working Group of the DPF Long Term Planning Study. Roughly 50 participants from 17 institutions in the U.S. and Europe (CERN) were organized into six working groups to study magnets, cryogenics and vacuum, antiproton sources, injectors, interaction regions, and lattice and beam dynamics. Upgrades to existing facilities (namely, Fermilab) and a post-LHC facility were discussed at the workshop. In this paper, the discussion will focus on the post-LHC facility. One of the specific goals of the workshop was to develop a defensible parameters list for a 30 TeV {times} 30 TeV hadron collider with luminosity of 1 {times} 10{sup 34} cm{sup {minus}2} sec{sup {minus}1}. While this accelerator would have only 50% higher energy than the SSC design, it was realized that the role of synchrotron radiation at this energy would significantly enhance the design and operation of the machine. Radiation damping times of a few hours, rather than one day, can be realized thus allowing less intense, but brighter proton beams
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Lattices for a high-field 30 TeV hadron collider
No full textLong arc cells would lead to major cost savings in a high field high T{sub c} hadron collider, operating in the regime of significant synchrotron radiation. Two such lattices, with half cell lengths of 110 and 260 m, are compared. Both allow flexible tuning, and have large dynamic apertures when dominated by chromatic sextupoles. Lattices with longer cells are much more sensitive to systematic magnet errors, which are expected to dominate
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Fermilab Proton Beam for Mu2e
No full textPlans to use existing Fermilab facilities to provide beam for the Muon to Electron Conversion Experiment (Mu2e) are under development. The experiment will follow the completion of the Tevatron Collider Run II, utilizing the beam lines and storage rings used today for antiproton accumulation without considerable reconfiguration. The proposed Mu2e operating scenario is described as well as the accelerator issues being addressed to meet the experimental goals
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Lattice optimization for a really large hadron collider (RLHC)
No full textLong arc cells would lead to major cost savings in a high field high T{sub c} hadron collider, operating in the regime of significant synchrotron radiation. Two such lattices, with half cell lengths of 110 and 260 m, are compared. Both allow flexible tuning, and have large dynamic apertures when dominated by chromatic sextupoles. Lattices with longer cells are much more sensitive to systematic magnet errors, which are expected to dominate
Wednesday, April 20, 2011
No full textAbstract The design process of modern high-energy synchrotrons involves the development of the accelerator lattice in pieces, typically an arc made up of repetitive cells interrupted by occasional matched insertions for injection, extraction, acceleration, and various other systems required by the facility. The focusing elements of an insertion must be such that the periodic amplitude functions at the ends of the insertion match those of the cells on either side of the insertion. How well this match has to be and its sensitivity to the global betatron tunes of the accelerator as well as the particle momentum are the underlying themes of this report. Many of the relationships also are of use to the designers of beamlines which are used to transport and inject beams into a synchrotron. Most of the content of this paper is not new to the accelerator physics community, but we thought it would be useful to place this important, basic information all in one place. Besides the classic work of Courant and Snyder, our sources include other papers, internal reports, and numerous discussions with our colleagues. II
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