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CheMin Instrument Performance and Calibration on Mars
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Author and Affiliation:
Vaniman, D. T.(Planetary Science Inst., Tucson, AZ, United States);
Blake, D. F.(NASA Ames Research Center, Moffett Field, CA, United States);
Morookian, J. M.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States);
Yen, A. S.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States);
Ming, D. W.(NASA Johnson Space Center, Houston, TX, United States);
Morris, R. V.(NASA Johnson Space Center, Houston, TX, United States);
Achilles, C. N.(Hamilton Sundstrand Corp., Houston, TX, United States);
Bish, D. L.(Indiana Univ., Bloomington, IN, United States);
Chipera, S. J.(Chesapeake Energy Corp., Oklahoma City, OK, United States);
Morrison, S. M.(Arizona Univ., Tucson, AZ, United States);
Downs, R. T.(Arizona Univ., Tucson, AZ, United States);
Rampe, E. B.(NASA Johnson Space Center, Houston, TX, United States);
Sarrazin, P. C.
Treiman, A. H.(Lunar and Planetary Inst., Houston, TX, United States);
Anderson, R. C.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States);
Bristow, T. F.(NASA Ames Research Center, Moffett Field, CA, United States);
Crisp, J. A.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States);
Des Marais, D. J.(NASA Ames Research Center, Moffett Field, CA, United States);
Spanovich, N.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States);
Wilson, M. A.(NASA Ames Research Center, Moffett Field, CA, United States);
et al.
Abstract: The CheMin (Chemistry and Mineralogy) instrument on the Mars Science Laboratory rover Curiosity uses a CCD detector and a Co-anode X-ray tube source to acquire both mineralogy (from the pattern of Co diffraction) and chemical information (from energies of fluoresced X-rays). A key component of the CheMin instrument is the ability to move grains within sample cells during analysis, providing multiple, random grain orientations that disperse diffracted X-ray photons along Debye rings rather than producing discrete Laue spots. This movement is accomplished by piezoelectric vibration of the sample cells. A cryocooler is used to maintain the CCD at a temperature at about -50 C in order to obtain energy resolution better than 250 eV, allowing discrimination of diffracted Co K X-rays from Fe K and other fluorescent X-rays. A detailed description of CheMin is provided in [1]. The CheMin flight model (FM) is mounted within the body of Curiosity and has been operating on Mars since August 6, 2012. An essentially identical sister instrument, the CheMin demonstration model (DM), is operated in a Mars environment chamber at JPL.
Publication Date: Jan 01, 2013
Document ID:
20130009995
(Acquired Feb 25, 2013)
Subject Category: SPACE SCIENCES (GENERAL)
Report/Patent Number: JSC-CN-27876
Document Type: Conference Paper
Meeting Information: 44th Lunar and Planetary Science Conference; 18-22 Mar. 2013; The Woodlands, TX; United States
Meeting Sponsor: Lunar and Planetary Inst.; Houston, TX, United States
Universities Space Research Association; Houston, TX, United States
Financial Sponsor: NASA Johnson Space Center; Houston, TX, United States
Organization Source: NASA Johnson Space Center; Houston, TX, United States
Description: 2p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: CALIBRATING; CHARGE COUPLED DEVICES; CHEMICAL ANALYSIS; MARS ENVIRONMENT; MARS SURFACE; MINERALOGY; PHOTONS; PLANETARY GEOLOGY; ROVING VEHICLES; TEST CHAMBERS; X RAY TUBES
Availability Notes: Abstract Only
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