Development of an automated scanning monochromator for sensitivity calibration of the MUSTANG instrument.

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by  Rivers, Thane Damian.;Cleary, David D.

CUDIEVK ..xLIBRARY
NAVALPOSTGRADUATESCHOOL
MO 93943-5008

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11 TITDLEev(IenlcloudpemSeecnutrityoCflasasinficaAtiuont)omated Scanning Monochromator for Sensitivity Calibration
nf fhP MUCTflMr. Tncfrnmonf (UNCI.flSSTFTFn)
12 PERSONAL AUTHOR(S)
Thane D. Rivers
13a TMYPaEstOFerR'EPsORTThesis 3FbROTMIME COVEREDTO. 4 DJAuTnEgOF1R9E9P2ORT (Year,Month.Day) 15 PAGE57COUN1
16 supplementary notation jne views expressed in this thesis are those of the author and
do not reflect the official policy of the Dept. of Defense or the US Government.
COSATI CODES I8 SUBJECT TERMS (Continue onreverse <fnecessaryandidentifyby block number)
FIELD GROUP SUB-GROUP Monochromator, MUSTANG, LabVIEW
19 ABSTRACT (Continue onreverseifnecessaryandidentifybyblock number)
An Automated Scanning Monochromator was developed using: an :Acton Research
Corporation (ARC) Monochromator, Ealing Photomultiplier Tube and a Macintosh
PC in conjuntion with LabVIEW software. The LabVIEW Virtual Instrument written
to operate the ARC Monochromator is a mouse driven user friendly program
developea specifically for automated spectral data measurements.
D-esolution and sensitivity of the Automated Scanning MonochromatorSystem
have been determined experimentally. The Automated Monochromator was then
used for spectral measurements of a Platinum Lamp. Additionally, the reflectivity
curve for a BaS04 coated screen has been measured. Reflectivity measurements
indicate a large discrepany with expected results. Further analysis of the
2220aL*D!CNIUSlANTMeCRLEaIABrSOUSyFTI,IFORINEE/SDDAP/aVOUvANNISiLLIIdABMBLIIETDLE.IIDTNYDIOVDFIDAUSBAALSMTERAACSTRPT DDTIC USERS 2212Ub(NA4TBC0ES8LLT)EARPSAHCS6OTIN4EFS6EI(-CIE2nUcDR8llu2Td8eACrLeAaSSCIoFdIeC)ATION OCFoFIdCeE3S9YMBOL
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reflectivity experiment is required for conclusive results,
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Development of anAutomated Scanning
Monochromator for Sensitivity
Calibration oftheMUSTANGInstrument
by
ThaneDamianRivers
Lieutenant, United StatesNavy
B.S., UnitedStatesNavalAcademy, 1986
Submittedinpartialfulfillment of
therequirements for the degree of
MASTER OF SCIENCEINASTRONAUTICALENGINEERING
fromthe
NAVALPOSTGRADUATE SCHOOL
June 1992
C.I
ABSTRACT
An Automated Scanning Monochromator was developed using an
Acton Research Corporation (ARC) monochromator, Ealing
photomultiplier tube and a Macintosh PC, in conjunction with LabVIEW
software. The LabVIEW Virtual Instrument written to operate the ARC
monochromater is a mouse-driven user-friendly program developed
specificallyfor automated spectral datameasurements.
Resolution and sensitivity of the Automated Scanning
Monochromator system have been determined experimentally. The
AutomatedMonochromator was then usedfor spectral measurements of
a platinum lamp. Additionally, the reflectivity curve for a BaS04 coated
screen has been measured. Reflectivity measurements indicate a large
discrepancy with expected results. Further analysis of the reflectivity
experimentis requiredfor conclusiveresults.
WDtEYKNOXLIBRARY
V CAL'PORNIA93943-5002
TABLE OF CONTENTS
INTRODUCTION
I. 1
A. THESIS OBJECTIVES 1
B. THESIS OUTLINE 2
H. EXPERIMENTBACKGROUND 3
A. MUSTANGEXPERIMENT 3
1. MUSTANGInstrument 3
2. Wavelength Calibration 4
3. SensitivityCalibration 5
4. ScreenPreparation 5
m. SOFTWARE/HARDWARE COMPONENTS 7
A. HARDWARE 7
1. ARC Spectrometer 7
a. ScanningMechanism 7
2. EalingPhotomultiplier 8
a. PhotodetectorModule 8
b. PhotomultiplierPower Supply 9
3. NB-MIO-16 10
B. MACINTOSHEx 11
C. LabVIEW 2.1.1 12
1. SoftwarePackage 12
a. FrontPanel 12
b. BlockDiagram 12
v
.
2. ARC Main 13
a. ARC Position 18
b. Angstroms Goto 19
c. IncrementARC 20
d. ReadAnalogData 21
IV. MONOCHROMATOREXPERIMENTS 23
A. MONOCHROMATORRESOLUTION 23
B. REFLECTIVITYMEASUREMENTS 24
1. FELLamp 25
2. DeuteriumLamp 29
C. ERRORANALYSIS 31
D PLATINUMLAMP 33
E. INSTRUMENTAL SENSITIVITY 37
V. CONCLUSION 40
APPENDIXA: OPERATINGINSTRUCTIONS 41
LIST OFREFERENCES 48
INITIALDISTRIBUTIONLIST 50
VI