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

Title: Tevatron optics with magnet moves for Roman pots at CDF

Abstract

CDF would like to install high precision track detectors. There is ample room on A-sector side, but space needs to be created at B11. The favored plan is to shove the first 3 B11 dipoles inwards toward the IP by 2.274 m. This would require removal of the inert Q1 quadrupole and its spool plus an extensive number of other mechanical and cryogenic modifications. The orbit distortion these modifications introduce would then be compensated by shifting the six B16 and B17 dipoles outwards by about half that amount. Space for this dipole move could be generated by replacing the 72 inch spool at B18 with a short 43 inch spool, and removing the 16.5 inch spacer after B17-5. The above scheme certainly recloses the orbit, and doesn't require the detector to move. However, by moving the B16 and B17 dipoles, the B17 and B18 arc quadrupoles also get shifted downstream--B17 by 1.115 m, and B18 by 0.696 m. Longitudinal movements of arc quads by such large fractions of their magnetic lengths will clearly impact the overall machine optics.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
784419
Report Number(s):
FERMILAB-TM-2157
TRN: US0200286
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 16 Aug 2001
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; FERMILAB TEVATRON; MODIFICATIONS; INSTALLATION; RADIATION DETECTORS; ACCELERATOR FACILITIES

Citation Formats

John A. Johnstone. Tevatron optics with magnet moves for Roman pots at CDF. United States: N. p., 2001. Web. doi:10.2172/784419.
John A. Johnstone. Tevatron optics with magnet moves for Roman pots at CDF. United States. doi:10.2172/784419.
John A. Johnstone. Thu . "Tevatron optics with magnet moves for Roman pots at CDF". United States. doi:10.2172/784419. https://www.osti.gov/servlets/purl/784419.
@article{osti_784419,
title = {Tevatron optics with magnet moves for Roman pots at CDF},
author = {John A. Johnstone},
abstractNote = {CDF would like to install high precision track detectors. There is ample room on A-sector side, but space needs to be created at B11. The favored plan is to shove the first 3 B11 dipoles inwards toward the IP by 2.274 m. This would require removal of the inert Q1 quadrupole and its spool plus an extensive number of other mechanical and cryogenic modifications. The orbit distortion these modifications introduce would then be compensated by shifting the six B16 and B17 dipoles outwards by about half that amount. Space for this dipole move could be generated by replacing the 72 inch spool at B18 with a short 43 inch spool, and removing the 16.5 inch spacer after B17-5. The above scheme certainly recloses the orbit, and doesn't require the detector to move. However, by moving the B16 and B17 dipoles, the B17 and B18 arc quadrupoles also get shifted downstream--B17 by 1.115 m, and B18 by 0.696 m. Longitudinal movements of arc quads by such large fractions of their magnetic lengths will clearly impact the overall machine optics.},
doi = {10.2172/784419},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {8}
}

Technical Report:

Save / Share: