scholarly journals Stardust Interstellar Preliminary Examination IX: High-speed interstellar dust analog capture in Stardust flight-spare aerogel

2014 ◽  
Vol 49 (9) ◽  
pp. 1666-1679 ◽  
Author(s):  
F. Postberg ◽  
J. K. Hillier ◽  
S. P. Armes ◽  
S. Bugiel ◽  
A. Butterworth ◽  
...  
Keyword(s):  
High Speed ◽  
Interstellar Dust ◽  
Preliminary Examination

scholarly journals Stardust Interstellar Preliminary Examination XI: Identification and elemental analysis of impact craters on Al foils from the Stardust Interstellar Dust Collector

2013 ◽  
Vol 49 (9) ◽  
pp. 1698-1719 ◽  
Author(s):  
Rhonda M. Stroud ◽  
Carlton Allen ◽  
Asna Ansari ◽  
David Anderson ◽  
Saša Bajt ◽  
...  
Keyword(s):  
Elemental Analysis ◽  
Interstellar Dust ◽  
Impact Craters ◽  
Dust Collector ◽  
Preliminary Examination

scholarly journals Stardust Interstellar Preliminary Examination II: Curating the interstellar dust collector, picokeystones, and sources of impact tracks

2013 ◽  
Vol 49 (9) ◽  
pp. 1522-1547 ◽  
Author(s):  
David R. Frank ◽  
Andrew J. Westphal ◽  
Michael E. Zolensky ◽  
Zack Gainsforth ◽  
Anna L. Butterworth ◽  
...  
Keyword(s):  
Interstellar Dust ◽  
Dust Collector ◽  
Preliminary Examination

Overview and Science of DESTINY+

2021 ◽  
Author(s):  
Tomoko Arai ◽  
Keyword(s):  
High Speed ◽  
High Performance ◽  
Interstellar Dust ◽  
Parent Body ◽  
Meteor Shower ◽  
Cosmic Dust ◽  
Dust Particles ◽  
Current Status ◽  
Space Technology ◽  
The Earth

<p>DESTINY+ (Demonstration and Experiment of Space Technology for INterplanetary voYage with Phaethon fLyby and dUst Science) was selected in 2017 as a mission for JAXA/ISAS small class program. It will be launched in 2024 by an Epsilon S rocket and flyby Phaethon in January, 2028. It is a joint mission of technology demonstration and scientific observation. The engineering mission is led by ISAS/JAXA and the science mission is led by PERC, Chiba Inst. of Technology (ChiTech). It will test high performance electric propelled vehicle technology and high-speed flyby of asteroid (3200) Phaethon and possibly asteroid 2005UD, a likely break-up body from Phaethon, as an extended mission. Engineering challenges include an up-close encounter at a distance of 500 km from Phaethon with radio-optical hybrid navigation guidance and control, and autonomous imaging based on optical information for target tracking during a high-speed flyby of about 35km/sec. The science goal is to understand the nature and origin of cosmic dust brought onto the Earth, in the context of exogenous contribution of carbon and organics for possible prebiotic seeds of the terrestrial life. Phaethon is a parent body of Geminid meteor shower, and thus a known source to periodically provide dust to the Earth, via its dust stream. The science objectives are two folded: (1) in-situ analyses of velocity, arrival direction, mass and chemical composition of interplanetary and interstellar dust particles around 1 au, the dust trail, and nearby Phaethon, and (2) flyby imaging of Phaethon to study its geology, for understanding dust ejection mechanism of active asteroid and the surface feature and composition which are affected by extensive solar heating. Science payloads include a panchromatic, telescopic camera with a tracking capability (TCAP), a visible-NIR multi-band camera with four bands of 425, 550, 700, 850 nm (MCAP), and a dust analyzer (DDA), which is an upgrade version of Cassini Cosmic Dust Analyzer (CDA). While the two cameras are developed by PERC/Chitech, DDA is developed by Univ. of Stuttgart, as an international collaboration with DLR. Ground calibration for DDA is being performed with German/Japanese joint efforts. International observation campaign for Phaethon was conducted in December 2017, and that of asteroid 2005 UD in October, 2018. Also, international observation campaign for stellar occultation by Phaethon was performed in 2019. Here, we present the current status and science of DESTINY+ mission.</p>

Stardust Interstellar Preliminary Examination III: Infrared spectroscopic analysis of interstellar dust candidates

2013 ◽  
Vol 49 (9) ◽  
pp. 1548-1561 ◽  
Author(s):  
Hans A. Bechtel ◽  
George J. Flynn ◽  
Carlton Allen ◽  
David Anderson ◽  
Asna Ansari ◽  
...  
Keyword(s):  
Interstellar Dust ◽  
Spectroscopic Analysis ◽  
Preliminary Examination ◽  
Infrared Spectroscopic Analysis ◽  
Infrared Spectroscopic

Stardust Interstellar Preliminary Examination IV: Scanning transmission X-ray microscopy analyses of impact features in the Stardust Interstellar Dust Collector

2014 ◽  
Vol 49 (9) ◽  
pp. 1562-1593 ◽  
Author(s):  
Anna L. Butterworth ◽  
Andrew J. Westphal ◽  
Tolek Tyliszczak ◽  
Zack Gainsforth ◽  
Julien Stodolna ◽  
...  
Keyword(s):  
Interstellar Dust ◽  
Dust Collector ◽  
X Ray ◽  
Preliminary Examination ◽  
Scanning Transmission

scholarly journals Stardust Interstellar Preliminary Examination V: XRF analyses of interstellar dust candidates at ESRF ID13

2014 ◽  
Vol 49 (9) ◽  
pp. 1594-1611 ◽  
Author(s):  
Frank E. Brenker ◽  
Andrew J. Westphal ◽  
Laszlo Vincze ◽  
Manfred Burghammer ◽  
Sylvia Schmitz ◽  
...  
Keyword(s):  
Interstellar Dust ◽  
Preliminary Examination ◽  
Xrf Analyses

Motion of a Small High-Speed Rotor in 3 Types of Foil Bearings

1975 ◽  
Vol 97 (2) ◽  
pp. 270-280 ◽  
Author(s):  
L. Licht ◽  
M. Branger
Keyword(s):  
High Speed ◽  
Modular Construction ◽  
Foil Bearings ◽  
Preliminary Examination ◽  
Experimental Apparatus ◽  
Rotor Axis

Experiments are conducted with 3 types of oilless (air lubricated) foil bearings and a small rotor, at speeds up to and in excess of 3,500 rps (210,000 rpm). The modular construction of the experimental apparatus provides for interchangeability of foil retainers in the supporting brackets, for their alignment, and for the positioning of bearings at various stations along the rotor axis. The symmetrical rotor, 12.7 cm (5.0 in.) long and weighing 2.97 N (0.667 lb) has both cylindrical and conical journals. The main purpose of the investigation is a preliminary examination of whirl-suppressing (stabilizing) characteristics of these flexible bearings, with the objective of application to small high-speed turbomachines.

Microfabrication research at the National Submicron Facility

1983 ◽  
Vol 41 ◽  
pp. 86-89
Author(s):  
E.D. Wolf
Keyword(s):  
Integrated Circuits ◽  
Particle Physics ◽  
High Speed ◽  
New Technology ◽  
High Energy ◽  
High Energy Particle ◽  
New Science ◽  
Wide Range ◽  
Intermediate Domain ◽  
Circuit Function

Most microelectronics devices and circuits operate faster, consume less power, execute more functions and cost less per circuit function when the feature-sizes internal to the devices and circuits are made smaller. This is part of the stimulus for the Very High-Speed Integrated Circuits (VHSIC) program. There is also a need for smaller, more sensitive sensors in a wide range of disciplines that includes electrochemistry, neurophysiology and ultra-high pressure solid state research. There is often fundamental new science (and sometimes new technology) to be revealed (and used) when a basic parameter such as size is extended to new dimensions, as is evident at the two extremes of smallness and largeness, high energy particle physics and cosmology, respectively. However, there is also a very important intermediate domain of size that spans from the diameter of a small cluster of atoms up to near one micrometer which may also have just as profound effects on society as “big” physics.

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

The on-line use of histogram data for high-speed correction and alignment of electron microscope images

1984 ◽  
Vol 42 ◽  
pp. 556-557
Author(s):  
William Krakow
Keyword(s):  
Power Spectrum ◽  
High Speed ◽  
Direct Memory Access ◽  
Digital Television ◽  
Contrast Transfer Function ◽  
The Past ◽  
High Resolution Tem ◽  
On Line ◽  
Correction Of Astigmatism ◽  
The Fourier Transform

In the past few years on-line digital television frame store devices coupled to computers have been employed to attempt to measure the microscope parameters of defocus and astigmatism. The ultimate goal of such tasks is to fully adjust the operating parameters of the microscope and obtain an optimum image for viewing in terms of its information content. The initial approach to this problem, for high resolution TEM imaging, was to obtain the power spectrum from the Fourier transform of an image, find the contrast transfer function oscillation maxima, and subsequently correct the image. This technique requires a fast computer, a direct memory access device and even an array processor to accomplish these tasks on limited size arrays in a few seconds per image. It is not clear that the power spectrum could be used for more than defocus correction since the correction of astigmatism is a formidable problem of pattern recognition.

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