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

Title: Investigation of Leveling Equipment for High Precision Measurements

Authors:
; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
903307
Report Number(s):
SLAC-PUB-12326
TRN: US0703521
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Presented at Americna Congress on Surveying and Mapping, St. Louis, Missouri, 9-12 Mar 2007
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 36 MATERIALS SCIENCE; ACCURACY; CALIBRATION; CAMERAS; GEODESY; INTERFEROMETERS; INVAR; LINEAR ACCELERATORS; MISSOURI; OPTICS; STANFORD LINEAR ACCELERATOR CENTER; Instrumentation,ENG

Citation Formats

Gassner, G.L., Ruland, R.E., and /SLAC. Investigation of Leveling Equipment for High Precision Measurements. United States: N. p., 2007. Web.
Gassner, G.L., Ruland, R.E., & /SLAC. Investigation of Leveling Equipment for High Precision Measurements. United States.
Gassner, G.L., Ruland, R.E., and /SLAC. Fri . "Investigation of Leveling Equipment for High Precision Measurements". United States. doi:. https://www.osti.gov/servlets/purl/903307.
@article{osti_903307,
title = {Investigation of Leveling Equipment for High Precision Measurements},
author = {Gassner, G.L. and Ruland, R.E. and /SLAC},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri May 11 00:00:00 EDT 2007},
month = {Fri May 11 00:00:00 EDT 2007}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • Since 1998 several hydrostatic leveling systems (HLS) have been installed in different locations at Fermilab. This work was in collaboration with Budker Institute and SLAC. All systems were either half-filled pipe (HF) or full-filled pipe (FF). Issues assembling HLS are covered in this article. An improved and cost-effective water system with temperature stabilized of water media is presented. This proposal is a double-tube full-filled DT-FF system. Examples of hardware configurations are included for systems located at Fermilab.
  • Sandia National Laboratories has developed a precision capacitor-roll-winding technology which we believe is essential to high-reliability designs using plastic-film dielectrics. The need for this winding capability developed during the research and development phase of the perfluorocarbon-capacitor technology described earlier. It has been found during the research and development phase of this technology that a number of winding parameters are critical to the electrical performance of plastic-film capacitors. For example, controlling the looseness of the winding is critical to electrical performance. Small differences in looseness can result in orders of magnitude change in discharge life. Excessive wander of the extended aluminummore » foils creates a difficult electroding problem. This paper justifies the need for this precision winding technology, summarizes the features required, and describes two machine designs incorporating these features.« less
  • At SLAC digital levels are used for precise leveling, both for setting out and monitoring. A very high precision of 30 {micro}m is required, which can only be achieved by regularly calibrating the leveling equipment. The calibration facility is also used for detailed investigations to refine the SLAC leveling procedure. In this paper the setup of the SLAC vertical comparator is described. In order to also perform traditional staff calibration a CCD camera was integrated into the SLAC comparator. Finally an overview of further investigations of our leveling equipment is presented.
  • The decay of {sup 154}Eu has been studied using {gamma}-ray singles and {gamma}-{gamma} coincidence spectroscopy with an array of Compton-suppressed Ge detectors. Particular attention to coincidence summing in the analysis, with consideration of detailed decay cascades and angular correlation effects, suggests that previous studies have overlooked necessary corrections. It is concluded that {sup 154}Eu provides 26 {gamma}-rays that can be used for relative efficiency calibrations from 120 to 1600 keV at the 0.7% precision level and that this precision could be improved in the future.