Data processing for the Active Particle-induced X-ray Spectrometer and initial scientific results from Chang'e-3 mission

被引：16

作者：

Fu, Xiao-Hui ^{[1
]}

Li, Chun-Lai ^{[1
]}

Zhang, Guang-Liang ^{[1
]}

Zou, Yong-Liao ^{[1
]}

Liu, Jian-Jun ^{[1
]}

Ren, Xin ^{[1
]}

Tan, Xu ^{[1
]}

Zhang, Xiao-Xia ^{[1
]}

Zuo, Wei ^{[1
]}

Wen, Wei-Bin ^{[1
]}

Peng, Wen-Xi ^{[2
]}

Cui, Xing-Zhu ^{[2
]}

Zhang, Cheng-Mo ^{[2
]}

Wang, Huan-Yu ^{[2
]}

机构：

[1] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

来源：

RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2014年 / 14卷 / 12期

基金：

中国国家自然科学基金;

关键词：

data analysis; composition; Moon; MARTIAN SOIL; ALPHA; CALIBRATION;

D O I：

10.1088/1674-4527/14/12/008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Active Particle-induced X-ray Spectrometer (APXS) is an important payload mounted on the Yutu rover, which is part of the Chang'e-3 mission. The scientific objective of APXS is to perform in-situ analysis of the chemical composition of lunar soil and rock samples. The radioactive sources, Fe-55 and Cd-109, decay and produce alpha-particlesand X-rays. When X-rays and alpha-particles interact with atoms in the surface material, they knock electrons out of their orbits, which release energy by emitting X-rays that can be measured by a silicon drift detector (SDD). The elements and their concentrations can be determined by analyzing their peak energies and intensities. APXS has analyzed both the calibration target and lunar soil once during the first lunar day and again during the second lunar day. The total detection time lasted about 266 min and more than 2000 frames of data records have been acquired. APXS has three operating modes: calibration mode, distance sensing mode and detection mode. In detection mode, work distance can be calculated from the X-ray counting rate collected by SDD. Correction for the effect of temperature has been performed to convert the channel number for each spectrum to X-ray energy. Dead time correction is used to eliminate the systematic error in quantifying the activity of an X-ray pulse in a sample and derive the real count rate. We report APXS data and initial results during the first and second lunar days for the Yutu rover. In this study, we analyze the data from the calibration target and lunar soil on the first lunar day. Seven major elements, including Mg, Al, Si, K, Ca, Ti and Fe, have been identified. Comparing the peak areas and ratios of calibration basalt and lunar soil the landing site was found to be depleted in K, and have lower Mg and Al but higher Ca, Ti, and Fe. In the future, we will obtain the elemental concentrations of lunar soil at the Chang'e-3 landing site using APXS data.

引用

页码：1595 / 1606

页数：12

共 21 条

[1] A fundamental parameters approach to calibration of the Mars Exploration Rover Alpha Particle X-ray Spectrometer: 2. Analysis of unknown samples [J].

Campbell, J. L. ;

Andrushenko, S. M. ;

Taylor, S. M. ;

Maxwell, J. A. .

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 2010, 115

[2] A fundamental parameters approach to calibration of the Mars Exploration Rover Alpha Particle X-ray Spectrometer [J].

Campbell, J. L. ;

Lee, M. ;

Jones, B. N. ;

Andrushenko, S. M. ;

Holmes, N. G. ;

Maxwell, J. A. ;

Taylor, S. M. .

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 2009, 114

[3] Calibration of the Mars Science Laboratory Alpha Particle X-ray Spectrometer [J].

Campbell, John L. ;

Perrett, Glynis M. ;

Gellert, Ralf ;

Andrushenko, Stefan M. ;

Boyd, Nicholas I. ;

Maxwell, John A. ;

King, Penelope L. ;

Schofield, Celeste D. M. .

SPACE SCIENCE REVIEWS, 2012, 170 (1-4) :319-340

[4]

Cui X. Z., 2014, LUNAR PLANETARY SCI, P1373

[5] Chemical analyses of martian soil and rocks obtained by the Pathfinder Alpha Proton X-ray spectrometer [J].

Economou, T .

RADIATION PHYSICS AND CHEMISTRY, 2001, 61 (3-6) :191-197

[6] Calibration of the Mars Pathfinder alpha proton X-ray spectrometer [J].

Foley, CN ;

Economou, TE ;

Clayton, RN ;

Dietrich, W .

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 2003, 108 (E12)

[7] Alpha particle X-ray spectrometer (APXS):: Results from Gusev crater and calibration report -: art. no. E02S05 [J].

Gellert, R ;

Rieder, R ;

Brückner, J ;

Clark, BC ;

Dreibus, G ;

Klingelhöfer, G ;

Lugmair, G ;

Ming, DW ;

Wänke, H ;

Yen, A ;

Zipfel, J ;

Squyres, SW .

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 2006, 111 (E2)

[8]

Gellert R., 2009, 40 LUNAR PLANETARY S, P2364

[9] Preface: The Chang'e-3 lander and rover mission to the Moon [J].

Ip, Wing-Huen ;

Yan, Jun ;

Li, Chun-Lai ;

Ouyang, Zi-Yuan .

RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2014, 14 (12) :1511-1513

[10] The Rosetta Alpha Particle X-ray Spectrometer (apxs) [J].

Klingelhoefer, G. ;

Brueckner, J. ;

D'Uston, C. ;

Gellert, R. ;

Rieder, R. .

SPACE SCIENCE REVIEWS, 2007, 128 (1-4) :383-396

← 1 2 3 →