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Title: Crystal face temperature determination means

Abstract

An optically transparent furnace (10) having a detection apparatus (29) with a pedestal (12) enclosed in an evacuated ampule (16) for growing a crystal (14) thereon. Temperature differential is provided by a source heater (20), a base heater (24) and a cold finger (26) such that material migrates from a polycrystalline source material (18) to grow the crystal (14). A quartz halogen lamp (32) projects a collimated beam (30) onto the crystal (14) and a reflected beam (34) is analyzed by a double monochromator and photomultiplier detection spectrometer (40) and the detected peak position (48) in the reflected energy spectrum (44) of the reflected beam (34) is interpreted to determine surface temperature of the crystal (14).

Inventors:
 [1];  [2]
  1. (Goleta, CA)
  2. (Nashville, TN)
Issue Date:
Research Org.:
EG & G Energy Measurements Inc
OSTI Identifier:
869608
Patent Number(s):
5365876
Assignee:
United States of America as represented by United States (Washington, DC) NVO
DOE Contract Number:  
AC08-88NV10617
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
crystal; temperature; determination; means; optically; transparent; furnace; 10; detection; apparatus; 29; pedestal; 12; enclosed; evacuated; ampule; 16; growing; 14; thereon; differential; provided; source; heater; 20; base; 24; cold; finger; 26; material; migrates; polycrystalline; 18; grow; quartz; halogen; lamp; 32; projects; collimated; beam; 30; reflected; 34; analyzed; double; monochromator; photomultiplier; spectrometer; 40; detected; peak; position; 48; energy; spectrum; 44; interpreted; determine; surface; energy spectrum; detection apparatus; optically transparent; source material; temperature differential; collimated beam; cold finger; reflected beam; surface temperature; temperature determination; source heat; line source; determine surface; halogen lamp; /117/

Citation Formats

Nason, Donald O., and Burger, Arnold. Crystal face temperature determination means. United States: N. p., 1994. Web.
Nason, Donald O., & Burger, Arnold. Crystal face temperature determination means. United States.
Nason, Donald O., and Burger, Arnold. Sat . "Crystal face temperature determination means". United States. https://www.osti.gov/servlets/purl/869608.
@article{osti_869608,
title = {Crystal face temperature determination means},
author = {Nason, Donald O. and Burger, Arnold},
abstractNote = {An optically transparent furnace (10) having a detection apparatus (29) with a pedestal (12) enclosed in an evacuated ampule (16) for growing a crystal (14) thereon. Temperature differential is provided by a source heater (20), a base heater (24) and a cold finger (26) such that material migrates from a polycrystalline source material (18) to grow the crystal (14). A quartz halogen lamp (32) projects a collimated beam (30) onto the crystal (14) and a reflected beam (34) is analyzed by a double monochromator and photomultiplier detection spectrometer (40) and the detected peak position (48) in the reflected energy spectrum (44) of the reflected beam (34) is interpreted to determine surface temperature of the crystal (14).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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