Characterization of magnetic property depth profiles of surface-modified materials using a model-assisted swept frequency modulation field technique

2009 ◽  
Vol 105 (7) ◽  
pp. 07E715
Author(s):  
C. C. H. Lo
Keyword(s):  
Magnetic Property ◽  
Frequency Modulation ◽  
Depth Profiles ◽  
Field Technique ◽  
Surface Modified

Synthesis and characterization of biomass-derived surface-modified activated carbon for enhanced CO2 adsorption

2021 ◽  
Vol 46 ◽  
pp. 101476
Author(s):  
Azeem Sarwar ◽  
Majid Ali ◽  
Asif Hussain Khoja ◽  
Azra Nawar ◽  
Adeel Waqas ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Co2 Adsorption ◽  
Synthesis And Characterization ◽  
Modified Activated Carbon ◽  
Surface Modified

Chromatographic characterization of surface-modified silica gels

1973 ◽  
Vol 87 (1) ◽  
pp. 35-48 ◽  
Author(s):  
Shubhender Kapila ◽  
Walter A. Aue ◽  
Joseph M. Augl
Keyword(s):  
Silica Gels ◽  
Modified Silica ◽  
Chromatographic Characterization ◽  
Surface Modified ◽  
Modified Silica Gels

DART and LICIACUBE: Documenting Kinetic Impact

2021 ◽  
Author(s):  
Andrew Cheng ◽  
Elizabetta Dotto ◽  
Eugene Fahnestock ◽  
Vincenzo Della Corte ◽  
Nancy Chabot ◽  
...  
Keyword(s):  
Time Delay ◽  
Velocity Distribution ◽  
Physical Properties ◽  
Optical Depth ◽  
Depth Profiles ◽  
Full Characterization ◽  
Approach Distance ◽  
Impact Ejecta ◽  
The Impact

<p>The NASA Double Asteroid Redirection Test (DART) mission will demonstrate asteroid deflection by a kinetic impactor. DART will impact Dimorphos, the secondary member of the (65803) Didymos system, in late September to early October, 2022 in order to change the binary orbit period. DART will carry a 6U CubeSat called LICIACube, contributed by the Italian Space Agency, to document the DART impact and to observe the impact ejecta. LICIACube will be released by DART 10 days prior to Didymos encounter, and LICIACube will fly by Dimorphos at closest approach distance of about 51 km and with a closest approach time delay of about 167 s after the DART impact. LICIACube will observe the structure and evolution of the DART impact ejecta plume and will obtain images of the surfaces of both bodies at best ground sampling about 1.4 m per pixel. LICIACube imaging importantly includes the non-impact hemisphere of the target body, the side not imaged by DART.</p> <p> </p> <p>The LICIACube flyby trajectory, notably the closest approach distance and the time delay of closest approach, are designed to optimize the study of ejecta plume evolution without exposing the satellite to impact hazard. LICIACube imaging will determine the direction of the ejecta plume and the ejection angles, and will further help to determine the ejecta momentum transfer efficiency <em>β</em>. The ejecta plume structure, as it evolves over time, is determined by the amount of ejecta that has reached a given altitude at a given time. The LICIACube plume images enable characterization of the ejecta mass versus velocity distribution, which is strongly dependent on target properties like strength and porosity and is therefore a powerful diagnostic of the DART impact, complementary to measurements of the DART impact crater by the ESA Hera mission which will arrive at Didymos in 2026. Hera will measure crater radius and crater volume to determine the total volume of ejecta, which together with a ejecta mass-velocity distribution gives a full characterization of the DART impact.</p> <p> </p> <p>Models of the ejecta plume evolution as imaged by LICIACube show how LICIACube images can discriminate between different target physical properties (mainly strength and porosity), thereby allowing inferences of the magnitude of the ejecta momentum. Measured ejecta plume optical depth profiles can distinguish between gravity-controlled and strength-controlled impact cases and help determine target physical properties. LICIACube ejecta plume images further provide information on the direction of the ejecta momentum as well as the magnitude, requiring full 2-D simulations of the plume images. We will present new simulation model optical depth profiles across the plume at arbitrary positions.</p> <p><br />We thank NASA for support of the DART project at JHU/APL, under Contract # NNN06AA01C, Task Order # NNN15AA05T. The Italian LICIACube team acknowledges financial support from Agenzia Spaziale Italiana (ASI, contract No. 2019-31-HH.0 CUP<br />F84I190012600).</p>

The Characterization of Depth Profiles of Thin Films and Interfaces by Nuclear Scattering Techniques

1987 ◽  
pp. 381-386
Author(s):  
C. Chauvin ◽  
J. F. Currie ◽  
S. Poulin-Dandurand ◽  
E. Sacher ◽  
A. Yelon ◽  
...  
Keyword(s):  
Thin Films ◽  
Nuclear Scattering ◽  
Depth Profiles

Spectral characterization of integrated acousto-optic tunable filters by means of laser frequency modulation spectroscopy

2006 ◽  
Vol 45 (36) ◽  
pp. 9176 ◽  
Author(s):  
Antonio Di Maio ◽  
Mario Salza ◽  
Gianluca Gagliardi ◽  
Pietro Ferraro ◽  
Paolo De Natale
Keyword(s):  
Frequency Modulation ◽  
Laser Frequency ◽  
Tunable Filters ◽  
Spectral Characterization ◽  
Modulation Spectroscopy ◽  
Laser Frequency Modulation

Plasma ion implantation of nitrogen into silicon: Characterization of the depth profiles of implanted ions

1994 ◽  
Vol 76 (10) ◽  
pp. 5666-5675 ◽  
Author(s):  
John J. Vajo ◽  
John D. Williams ◽  
Ronghua Wei ◽  
Robert G. Wilson ◽  
Jesse N. Matossian
Keyword(s):  
Ion Implantation ◽  
Depth Profiles
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