Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-09T19:36:04.025Z Has data issue: false hasContentIssue false
  • English
  • Français

Precision Machining And Polishing Of Scintillating Crystals For Large Calorimeters And Hodoscopes

Published online by Cambridge University Press:  21 February 2011

Craig R. Wuest ,
Baruch A. Fuchs ,
Fred R. Holdener  and
Joaquim L. Heck Jr
Craig R. Wuest
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94551
Baruch A. Fuchs
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94551
Fred R. Holdener
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94551
Joaquim L. Heck Jr
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
Get access

Abstract

New machining and polishing techniques have been developed for large scintillating crystal arrays such as the Barium Fluoride Electromagnetic Calorimeter for the GEM Detector at SSCL, the Crystal Clear Collaboration's cerium fluoride or lead tungstenate calorimeter at the proposed LHC at CERN, the PHENIX Detector at RHIC (barium fluoride), and the cesium iodide Calorimeter for the BaBar Detector at PEP-I B Factory at SLAC. The machining and polishing methods to be presented in this paper provide crystalline surfaces without sub-surface damage or deformation as verified by Rutherford Back-scattering (RBS) analysis. Surface roughness of about 10-20 angstroms and sub-micron mechanical tolerances have been demonstrated on large barium fluoride crystal samples. Mass production techniques have also been developed for machining the proper angled surfaces and polishing up to five 50 cm long crystals at one time. These techniques utilize kinematic mount technology developed at LLNL to allow precision machining and polishing of complex surfaces. We will present this technology along with detailed surface studies of barium fluoride and cerium fluoride crystals polished with this technique.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 348 , 1994 , 545
Copyright
Copyright © Materials Research Society 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Newman, H., “Crystal Detectors in Particle Physics,” presented at the 1994 MRS Spring Meeting, San Francisco, CA, 1994 (unpublished).10.1557/PROC-348-3Google Scholar
2. Ma, D., Newman, H., and Zhu, R., “Barium Fluoride Crystals for Future Hadron Colliders,” presented at the 1994 MRS Spring Meeting, San Francisco, CA, 1994 (unpublished).Google Scholar
3. Lecoq, P., “Progress on Scintillator Research by the Crystal Clear Collaboration,” presented at the 1994 MRS Spring Meeting, San Francisco, CA, 1994 (unpublished).10.1557/PROC-348-51Google Scholar
4.“Status Report on the Design of a Detector for the Study of CP Violation at PEP-II at SLAC: BaBar,” SLAC-419, June, 1993 (unpublished).Google Scholar
5.“PHENIX Conceptual Design Report,” January, 1993 (unpublished).Google Scholar
6. Yin, Z. W., “Research and Development Works on BaF2 Crystals in Shanghai Institute of Ceramics,” presented at the 1994 MRS Spring Meeting, San Francisco, CA, 1994 (unpublished).10.1557/PROC-348-65Google Scholar