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Title: Compensation of the solenoid field in the colliding-beams detector

Abstract

There is no need to provide individual compensation for the detector solenoid. The correction skew quads which correct for the skew quad errors should take care of the detector solenoid. (GHT)

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (USA)
OSTI Identifier:
6219892
Report Number(s):
FNAL-TM-1119
ON: DE85003345
DOE Contract Number:
AC02-76CH03000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; FERMILAB ACCELERATOR; RADIATION DETECTORS; MAGNETIC FIELDS; COLLIDING BEAMS; CORRECTIONS; SOLENOIDS; ACCELERATORS; BEAMS; CYCLIC ACCELERATORS; ELECTRIC COILS; ELECTRICAL EQUIPMENT; EQUIPMENT; MEASURING INSTRUMENTS; SYNCHROTRONS; 430303* - Particle Accelerators- Experimental Facilities & Equipment; 440104 - Radiation Instrumentation- High Energy Physics Instrumentation

Citation Formats

Teng, L.C.. Compensation of the solenoid field in the colliding-beams detector. United States: N. p., 1982. Web. doi:10.2172/6219892.
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Teng, L.C.. Compensation of the solenoid field in the colliding-beams detector. United States. doi:10.2172/6219892.
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Teng, L.C.. Fri . "Compensation of the solenoid field in the colliding-beams detector". United States. doi:10.2172/6219892. https://www.osti.gov/servlets/purl/6219892.
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@article{osti_6219892,
title = {Compensation of the solenoid field in the colliding-beams detector},
author = {Teng, L.C.},
abstractNote = {There is no need to provide individual compensation for the detector solenoid. The correction skew quads which correct for the skew quad errors should take care of the detector solenoid. (GHT)},
doi = {10.2172/6219892},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 04 00:00:00 EDT 1982},
month = {Fri Jun 04 00:00:00 EDT 1982}
}
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Technical Report:
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DOI:  10.2172/6219892
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  • Because the solenoid is very weak for 1 TeV beams, the alignment tolerances as far as the beams are concerned can be negligibly loose (The tolerances will be determined rather by accuracies for the measurement and analysis of particle tracks.) and there is no need to compensate for its orbital effects.

  • In this note we consider compensation of the vertical angle at the IP that arises when the NLC beam enters the detector solenoid. While this angle is antisymmetric for e{sup +}e{sup -} collisions and does not affect luminosity, compensating this angle is desirable to guarantee knowledge of polarization at the IP. For the e{sup -}e{sup -} case compensation is necessary also from the luminosity point of view. We show in this note that the most effective compensation can be done locally, with a special dipole coil arrangement incorporated into the detector. It is shown that compensation can be achieved formore » both e{sup +}e{sup -} and e{sup -}e{sup -} case and that this scheme is compatible with beam size compensation by both the standard method, using skew quadrupoles, and by means of more advantageous method using weak antisolenoids.« less

  • In this paper, the authors discuss the optics effects of the realistic detector solenoid field on beam size at the Interaction Point (IP) of a future Linear Collider and their compensation. It is shown that most of the adverse effects on the IP beam size arise only from the part of the solenoid field which overlaps and extends beyond the final focusing quadrupoles. It is demonstrated that the most efficient and local compensation can be achieved using weak antisolenoids near the IP, while a correction scheme which employs only skew quadrupoles is less efficient, and compensation with strong antisolenoids ismore » not appropriate. One of the advantages of the proposed antisolenoid scheme is that this compensation works well over a large range of the beam energy« less

  • This paper presents a method for compensating the vertical orbit change through the Interaction Region (IR) that arises when the beam enters the Linear Collider detector solenoid at a crossing angle. Such compensation is required because any deviation of the vertical orbit causes degradation of the beam size due to synchrotron radiation, and also because the nonzero total vertical angle causes rotation of the polarization vector of the bunch. Compensation may be necessary to preserve the luminosity or to guarantee knowledge of the polarization at the Interaction Point (IP). The most effective compensation is done locally with a special dipolemore » coil arrangement incorporated into the detector (Detector Integrated Dipole). The compensation is effective for both e{sup +}e{sup -} and e{sup -}e{sup -} beams, and the technique is compatible with beam size compensation either by the standard method, using skew quadrupoles, or by a more effective method using weak antisolenoids.« less

  • ; ; ; ...
    This paper presents calculations of detector solenoid effects on disrupted primary beam in the ILC 14 mrad extraction line. Particle tracking simulations are performed for evaluation of primary beam loss along the line as well as of beam distribution and polarization at Compton Interaction Point. The calculations are done both without and with solenoid compensation. The results are obtained for the baseline ILC energy of 500 GeV center-of-mass and three options of beam parameters.