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Title: Analysis and Design of Cold Helium Gas Warm Up for the 2K Experiment

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Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider
Sponsoring Org.:
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Technical Report
Country of Publication:
United States
43; relativistic heavy ion collider

Citation Formats

Sidi-Yekhlef A., Stohlman, O., and Krupczak, J.. Analysis and Design of Cold Helium Gas Warm Up for the 2K Experiment. United States: N. p., 2005. Web. doi:10.2172/1061815.
Sidi-Yekhlef A., Stohlman, O., & Krupczak, J.. Analysis and Design of Cold Helium Gas Warm Up for the 2K Experiment. United States. doi:10.2172/1061815.
Sidi-Yekhlef A., Stohlman, O., and Krupczak, J.. Tue . "Analysis and Design of Cold Helium Gas Warm Up for the 2K Experiment". United States. doi:10.2172/1061815.
title = {Analysis and Design of Cold Helium Gas Warm Up for the 2K Experiment},
author = {Sidi-Yekhlef A. and Stohlman, O. and Krupczak, J.},
abstractNote = {},
doi = {10.2172/1061815},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 01 00:00:00 EST 2005},
month = {Tue Nov 01 00:00:00 EST 2005}

Technical Report:

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  • The 2K system at CEBAF includes four stages of centrifugal cold compressors that operate between a suction pressure of 0.031 atm and a discharge of {approximately}1 atm. Starting the cold compressors and pumping the system down to operating pressure is a complex and time consuming operation. Many months of rigorous testing were required to develop a reliable startup procedure. This procedure has been automated through the development of an Autopumpdown program that intelligently coordinates the necessary steps across the boundaries of the existing cryogenic and accelerator control systems. this program has greatly reduced both the time and effort required tomore » recover from failures and restart the system. The paper describes the requirements addressed by the program, the steps it takes while operating, the historical development of the program, the spin-off benefits, and the course of anticipated future developments.« less
  • This procedure is a modification of the urban driving cycles noted in SAE J1082 and which is run on a suitable road or test track. The procedure yields cold start/warm-up fuel economy values indicative of consumption level at the ambient condition of the test. The procedure can be utilized to determine the fuel economy differential among vehicles or between vehicle changes. This SAE recommended practice provides a uniform test procedure for measuring the fuel economy of light duty vehicles during cold start and warm-up operation (motor vehicles designed primarily for transportation of persons or property and rated at 4,500 kgmore » GVW (10,000 lb) or less) on suitable roads.« less
  • For the purpose of determining the optimum location for fixing the cold end of the RHIC standard braided heat strap on the Warm-to-cold transition (W/C) beam tube assembly the following study was conducted.
  • The research was directed towards a sorbent injection/particle removal process where a sorbent may be injected upstream of the warm gas cleanup system to scavenge Hg and other trace metals, and removed (with the metals) within the warm gas cleanup process. The specific objectives of this project were to understand and quantify, through fundamentally based models, mechanisms of interaction between mercury vapor compounds and novel paper waste derived (kaolinite + calcium based) sorbents (currently marketed under the trade name MinPlus). The portion of the research described first is the experimental portion, in which sorbent effectiveness to scavenge metallic mercury (Hg{supmore » 0}) at high temperatures (>600 C) is determined as a function of temperature, sorbent loading, gas composition, and other important parameters. Levels of Hg{sup 0} investigated were in an industrially relevant range ({approx} 25 {micro}g/m{sup 3}) although contaminants were contained in synthetic gases and not in actual flue gases. A later section of this report contains the results of the complementary computational results.« less