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Title: Measurement of the long-range beam-beam effect at injection, and design for a compensator in RHIC

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider
Sponsoring Org.:
USDOE SC OFFICE OF SCIENCE (SC)
OSTI Identifier:
1061827
Report Number(s):
BNL-99386-2013-IR
KB0202011
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43; relativistic heavy ion collider

Citation Formats

Fischer W., Alforque, R., Hseuh, H.C., Lambiase, R., Liaw, C.J., Miglionico, G., Russo, T., Koutchouk, .J.-P., Zimmermann, F., and Sen, .T.. Measurement of the long-range beam-beam effect at injection, and design for a compensator in RHIC. United States: N. p., 2006. Web. doi:10.2172/1061827.
Fischer W., Alforque, R., Hseuh, H.C., Lambiase, R., Liaw, C.J., Miglionico, G., Russo, T., Koutchouk, .J.-P., Zimmermann, F., & Sen, .T.. Measurement of the long-range beam-beam effect at injection, and design for a compensator in RHIC. United States. doi:10.2172/1061827.
Fischer W., Alforque, R., Hseuh, H.C., Lambiase, R., Liaw, C.J., Miglionico, G., Russo, T., Koutchouk, .J.-P., Zimmermann, F., and Sen, .T.. Sat . "Measurement of the long-range beam-beam effect at injection, and design for a compensator in RHIC". United States. doi:10.2172/1061827. https://www.osti.gov/servlets/purl/1061827.
@article{osti_1061827,
title = {Measurement of the long-range beam-beam effect at injection, and design for a compensator in RHIC},
author = {Fischer W. and Alforque, R. and Hseuh, H.C. and Lambiase, R. and Liaw, C.J. and Miglionico, G. and Russo, T. and Koutchouk, .J.-P. and Zimmermann, F. and Sen, .T.},
abstractNote = {},
doi = {10.2172/1061827},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Apr 01 00:00:00 EST 2006},
month = {Sat Apr 01 00:00:00 EST 2006}
}

Technical Report:

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  • The characteristics of the stripping foil have been calculated by Dr. M.J. Rhoades-Brown. There is some difference between the results and those data published in the blue book. The beam transport line with low β waist for foil SA has been described. But considering that, between UQ3 and UQ4 most space is filled by soil and a lot of constructional work will be needed in order to install quadrupoles between UQ3 and UQ4, two new lattices with the required low β waist are found. In this paper, these new low β waist lattices of the beam transport line between AGSmore » and RHIC are described and the effects of the stripping foil SA on the injection beam of RHIC are calculated using the new dates in reference 1.« less
  • The coherent effect of beam-beam forces on the stability of the motion of beams as rigid bunches in a collider is studied by means of simulation. The number of bunches per beam is taken to be large, with many bunches colliding simultaneously within each interaction region. It is also assumed that they populate the beams uniformly, and that they are equally spaced. The interaction regions are all identical and evenly spaced. The collision forces are assumed to be one-dimensional linear kicks. Results for stability limits are presented, as a function of tune, for various beam configurations and several values ofmore » the crossing angle. 11 refs., 3 figs.« less
  • We obtain the half aperture for the circulating beam by scaling from the high beta quads, which have B=400 m and half aperturemore » $$\bar{ha}$$=60 mm. Therefore: ha ≥ 60√β/400 mm. This rule neglects dispersive effects (η p) but this is acceptable.« less
  • The change of the AGS ejected beam parameter will influence the injection efficiency of RHIC, cause phase space dilution and decrease the luminosity of RHIC. The changes of the beam parameters at the RHIC injection point caused by the changes of the AGS ejected beam parameters have been calculated and summarized in this note.
  • At large distances the electromagnetic field of a wire is the same as the field produced by a bunch. Such a long-range beam-beam wire compensator was proposed for the LHC, and single beam tests with wire compensators were successfully done in the SPS. RHIC offers the possibility to test the compensation scheme with colliding beams. We report on measurements of beam losses as a function of transverse separation in RHIC at 100 GeV, and comparisons with simulations. We present a design for a long-range wire compensator in RHIC.