skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: NLC Luminosity as a Function of Beam Parameters

Abstract

Realistic calculation of NLC luminosity has been performed using particle tracking in DIMAD and beam-beam simulations in GUINEA-PIG code for various values of beam emittance, energy and beta functions at the Interaction Point (IP). Results of the simulations are compared with analytic luminosity calculations. The optimum range of IP beta functions for high luminosity was identified.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
799098
Report Number(s):
SLAC-PUB-9254
TRN: US0204389
DOE Contract Number:
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 6 Jun 2002
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM EMITTANCE; BEAM LUMINOSITY; PARTICLE TRACKS; LINEAR COLLIDERS; BEAM-BEAM INTERACTIONS

Citation Formats

Nosochkov, Yuri. NLC Luminosity as a Function of Beam Parameters. United States: N. p., 2002. Web. doi:10.2172/799098.
Copy to clipboard
Nosochkov, Yuri. NLC Luminosity as a Function of Beam Parameters. United States. doi:10.2172/799098.
Copy to clipboard
Nosochkov, Yuri. Thu . "NLC Luminosity as a Function of Beam Parameters". United States. doi:10.2172/799098. https://www.osti.gov/servlets/purl/799098.
Copy to clipboard
@article{osti_799098,
title = {NLC Luminosity as a Function of Beam Parameters},
author = {Nosochkov, Yuri},
abstractNote = {Realistic calculation of NLC luminosity has been performed using particle tracking in DIMAD and beam-beam simulations in GUINEA-PIG code for various values of beam emittance, energy and beta functions at the Interaction Point (IP). Results of the simulations are compared with analytic luminosity calculations. The optimum range of IP beta functions for high luminosity was identified.},
doi = {10.2172/799098},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jun 06 00:00:00 EDT 2002},
month = {Thu Jun 06 00:00:00 EDT 2002}
}
Copy to clipboard
Technical Report:
View Technical Report
DOI:  10.2172/799098
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

  • In this note we present results of beam tracking in the NLC extraction line for the NLC option with high luminosity beam parameters (option H). Particle losses for 0.5 TeV and 1 TeV cms energy beams have been computed and examined as a function of beam offset at the interaction point (IP). Updated tracking results for the NLC option A are presented as well.

  • The energy spectrum of electrons at the interaction point of a linear collider is determined largely by the beamstrahlung spectrum. The beamstrahlung spectrum in turn is sensitive to the design parameters at the interaction point. In this paper we examine the optimization of the luminosity spectrum for discovery and detailed exploration of various physics processes of interest in the NLC, in particular, top and stop pair production, and a class of processes occurring via W-W scattering.

  • We examine the optimization of the NLC for e{sup -}e{sup -} running. The dependence of luminosity on the interaction point beta functions {beta}{sub x}, {beta}{sub y}, emittances {epsilon}{sub x}, {epsilon}{sub y}, bunch charge N, and bunch length {sigma}{sub z} are very different for e{sup +}e{sup -} and e{sup -}e{sup -} because disruption reduces the luminosity in e{sup -}e{sup -} rather than increasing it as in e{sup +}e{sup -}. We examine how much luminosity may be regained in e{sup -}e{sup -} by varying these parameters away from optimized flat beam e{sup +}e{sup -} values. The results are compared with round beammore » e{sup -}e{sup -} designs considered in an earlier paper.« less

  • We examine the optimization of the NLC for e{sup -}e{sup -} running. The dependence of luminosity on the interaction point beta functions {beta}{sub x}, {beta}{sub y}, emittances {epsilon}{sub x}, {epsilon}{sub y}, bunch charge N, and bunch length {sigma}{sub z} are very different for e{sup +}e{sup -} and e{sup -}e{sup -} because disruption reduces the luminosity in e{sup -}e{sup -} rather than increasing it as in e{sup +}e{sup -}. We examine how much luminosity may be regained in e{sup -}e{sup -} by varying these parameters away from optimized at beam e{sup +}e{sup -} values. The results are compared with round beammore » e{sup -}e{sup -} designs considered in an earlier paper.« less

  • We present results from luminosity, energy and polarization studies at a future Linear Collider. We compare e{sup +}e{sup -} and e{sup -}e{sup -} modes of operation and consider both NLC and TESLA beam parameter specifications at a center-of-mass energy of 500 GeV. Realistic colliding beam distributions are used, which include dynamic effects of the beam transport from the Damping Rings to the Interaction Point. Beam-beam deflections scans and their impact for beam-based feedbacks are considered. A transverse kink instability is studied, including its impact on determining the luminosity-weighted center-of-mass energy. Polarimetry in the extraction line from the IP is presented,more » including results on beam distributions at the Compton IP and at the Compton detector.« less