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THE TWO-BEAM ACCELERATOR

Description: A Two-Beam Accelerator, in which one of the beams is an intense low energy beam made to undergo free electron lasing and the other beam is a compact bunch of high energy electrons, is shown to be an interesting possibility for a linear collider.
Date: April 1, 1984
Creator: Hopkins, D.B.; Sessler, A.M. & Wurtele, J.S.
Partner: UNT Libraries Government Documents Department

ATLAS Metadata Task Force

Description: This document provides an overview of the metadata, which are needed to characterizeATLAS event data at different levels (a complete run, data streams within a run, luminosity blocks within a run, individual events).
Date: April 4, 2007
Creator: Collaboration, ATLAS; Costanzo, D.; Cranshaw, J.; Gadomski, S.; Jezequel, S.; Klimentov, A. et al.
Partner: UNT Libraries Government Documents Department

MAGNETIC DESIGN OF A HIGH GRADIENT QUADRUPOLE FOR THE LHC LOW B INSERTIONS.

Description: Fermilab, Lawrence Berkeley National Laboratory and Brookhaven National Laboratory have formed a consortium to provide components for the Large Hadron Collider (LHC) to be built at CERN. The U.S. contribution includes half of the high gradient quadrupoles (HGQ) for the inner focusing triplets. In this paper a description of the HGQ magnetic design is given, including short sample limit for field gradient, sources and expected values of systematic and random field errors, and possible strategies for field quality correction.
Date: May 12, 1997
Creator: Sabbi, G.; Gourlay, S. A.; Kerby, J.; Lamm, M. J.; Limon, P. J.; Nobrega, F. et al.
Partner: UNT Libraries Government Documents Department

Emittance dilution due to slow alignment drifts in the main linacs of the NLC

Description: The tight tolerances in the main linacs of the Nest Linear Collider (NLC) result in a large sensitivity of the beam emittance to slow alignment drifts. Once the accelerator is tuned, the optimized emittances must be maintained. Slow alignments drifts will make resteering and reoptimization necessary. The frequency of these linac reoptimizations is an important parameter that determines how well the linear collider can be operated. We present simulation results that address this question for the main linacs of the NLC. We will show that the effects of alignment drifts can indeed be handled.
Date: September 1, 1996
Creator: Assmann, R.; Adolphsen, C. & Bane, K.
Partner: UNT Libraries Government Documents Department

Modeling large heterogeneous RF structures

Description: Large heterogeneous structures are difficult to model on a numerical grid because of the limitations on computing resources, so that alternate approaches such as equivalent circuits and mode-matching have been developed to treat this problem. This paper will describe the three methods and will analyze a structure representative of the SLAC and JLC detuned structures to compare the efficacy of each approach.
Date: November 1, 1996
Creator: Li, Zenghai; Ko, Kwok; Srinivas, V. & Higo, Toshiyasu
Partner: UNT Libraries Government Documents Department

Summary report for the Microwave Source Working Group

Description: This report summarizes the discussions of the Microwave Source Working Group during the Advanced Accelerator Concepts Workshop held October 13-19, 1996 in the Granlibakken Conference Center at Lake Tahoe, California. Progress on rf sources being developed for linear colliders is reviewed. Possible choices for high-power rf sources at 34 GHz and 94 GHz for future colliders are examined. 27 refs.
Date: January 1, 1997
Creator: Westenskow, G. A.
Partner: UNT Libraries Government Documents Department

Quantum Suppression of beamstrahlung for future linearcolliders

Description: Beamstrahhmg at interaction point may present severe lim- itations on linear collider performance. The approach to re- duce this effect adopted for all current designs at 0.5 TeV will become more difficult and less effective at higher en- ergy. We discuss the feasibility of an alternative approach, based on an effect known as quantum suppression of beam- strahlung, for future linear colliders at multi-TeV energy.
Date: June 1, 1998
Creator: Xie, Ming
Partner: UNT Libraries Government Documents Department

ACCELERATION FOR A HIGH ENERGY MUON COLLIDER

Description: The authors describe a method for designing the acceleration systems for a muon collider, with particular application and examples for a high energy muon collider. This paper primarily concentrates on design considerations coming from longitudinal motion, but some transverse issues are briefly discussed.
Date: April 7, 2000
Creator: BERG,J.S
Partner: UNT Libraries Government Documents Department

Quantum suppression of beamstrahlung for future e+e- linear colliders

Description: Beamstrahlung at interaction point may present severe limitations on linear collider performance. The approach to reduce this effect adopted for all current designs at a center-of-mass energy of 0.5 TeV will become more difficult and less effective at higher energy. We discuss the feasibility of an alternative approach, based on an effect known as quantum suppression of beamstrahlung, for future linear colliders at multi-TeV energy.
Date: May 1, 1998
Creator: Xie, Ming
Partner: UNT Libraries Government Documents Department

Estimates of dispersive effects in a bent NLC Main Linac

Description: An alternative being considered for the Next Linear Collider (NLC) is not to tunnel in a straight line but to bend the Main Linac into an arc so as to follow a gravitational equipotential. The authors begin here an examination of the effects that this would have on vertical dispersion, with its attendant consequences on synchrotron radiation and emittance growth by looking at two scenarios: a gentle continuous bending of the beam to follow an equipotential surface, and an introduction of sharp bends at a few sites in the linac so as to reduce the maximum sagitta produced.
Date: October 31, 2000
Creator: Michelotti, Michael Syphers and Leo
Partner: UNT Libraries Government Documents Department

Future prospects for muon facilities

Description: The motivation, prospects, and R and D plans for future high-intensity muon facilities are described, with an emphasis on neutrino factories. The additional R and D needed for muon colliders is also considered.
Date: August 28, 2000
Creator: Geer, Steve
Partner: UNT Libraries Government Documents Department