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Title: Proposed system for measuring the vertical cold-mass motions in the RHIC cryogenic quadrupoles

Authors:
; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider
Sponsoring Org.:
USDOE SC OFFICE OF SCIENCE (SC)
OSTI Identifier:
1061816
Report Number(s):
BNL-99375-2013-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

Thieberger P., Mackay, W.W., Ptitsyn, V.I., and Trbojevic, D. Proposed system for measuring the vertical cold-mass motions in the RHIC cryogenic quadrupoles. United States: N. p., 2005. Web. doi:10.2172/1061816.
Thieberger P., Mackay, W.W., Ptitsyn, V.I., & Trbojevic, D. Proposed system for measuring the vertical cold-mass motions in the RHIC cryogenic quadrupoles. United States. doi:10.2172/1061816.
Thieberger P., Mackay, W.W., Ptitsyn, V.I., and Trbojevic, D. Thu . "Proposed system for measuring the vertical cold-mass motions in the RHIC cryogenic quadrupoles". United States. doi:10.2172/1061816. https://www.osti.gov/servlets/purl/1061816.
@article{osti_1061816,
title = {Proposed system for measuring the vertical cold-mass motions in the RHIC cryogenic quadrupoles},
author = {Thieberger P. and Mackay, W.W. and Ptitsyn, V.I. and Trbojevic, D.},
abstractNote = {},
doi = {10.2172/1061816},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}

Technical Report:

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  • Studies were made to investigate the possibility of removing oxide impurities from Na-cooled reactor systems by cold trapping in conjunction with fill-drain tanks. (W.L.H.)
  • A non-contact system for alignment of objects on mass properties measuring instruments is described. Test parts can be aligned to within the capabilities of the user and the fixture to make the adjustments. The current implementation can align objects to less than .001 inches at two points with final requested adjustments of a few ten-thousands of an inch. The non-contact capability allows the alignment of objects which are too compliant or fragile for traditional contacting measurement methods. Also, this system allows the definition of a reference axis on objects which are not perfectly symmetric. The reference axis is defined atmore » the top of the object by an appropriate marker and defined at the bottom by a best fit circle through the surface at a specified height. A general description of the hardware, procedures, and results are presented for the non-user. Appendices which contain a complete description of the software, usage, and mathematical implementation are provided for the reader who is interested in using or further developing the system.« less
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  • Conclusions from an examination of RHIC cold mass support are that: the most severe loading condition anticipated for the cold mass support posts is the axial load due to a helium pressure imbalance over the length of the magnet; the worst conceivable case is the pressure upset occurring during a cool down or warm up of the superconducting magnet; the center post cradle must be properly designed and tightly installed to transfer a bending moment; the worst probably case is a pressure upset occurring while the magnet is either warm or cold; and the estimate of the worst probably casemore » are one with a maximum stress intensity of 4300 psi and an axial travel of 0.094 inches.« less