| 1. |
- Menoni, C. S., et al.
(författare)
-
Advances in Nanoscale Resolution Soft X-Ray Laser Microscopy
- 2009
-
Ingår i: X-RAY LASERS 2008, PROCEEDINGS. - : Springer Netherlands. - 9781402099236 ; , s. 341-347
-
Konferensbidrag (refereegranskat)abstract
- We review our most recent results on table-top, nanometer-scale resolution, microscopy using compact soft x-ray lasers developed at Colorado State University. We have realized the first demonstration of wavelength-resolution microscopy in the soft x-ray spectral range. Images of carbon nanotubes, 50 nm in diameter, were obtained with a single similar to 1 ns duration laser pulse from a desk-top size capinary discharge 46.9 nm laser. We fully characterized the new microscope by measuring the modulation transfer function of the instrument for zone plate objectives with three different numerical apertures, demonstrating that 54 nm half-period structures can be resolved. The combination of near-wavelength spatial resolution with high temporal resolution imaging opens myriad opportunities for imaging nanoscale structures.
|
|
| 2. |
- Brizuela, F., et al.
(författare)
-
High resolution full-field imaging of nanostructures using compact extreme ultraviolet lasers
- 2009
-
Ingår i: 9TH INTERNATIONAL CONFERENCE ON X-RAY MICROSCOPY. - : IOP Publishing.
-
Konferensbidrag (refereegranskat)abstract
- Recent advances in the development of high peak brightness table-top extreme ultraviolet (EUV) and soft x-ray (SRX) lasers have opened new opportunities for the demonstration of compact full-field EUV/SXR microscopes capable of capturing images with short exposures down to a single laser shot. We demonstrate the practical application of table-top zone plate EUV microscopes that can image nanostructures with a spatial resolution of 54 nm and below and exposure times as short as 1.2 ns, the duration of a single laser shot.
|
|
| 3. |
- Mahata, K., et al.
(författare)
-
Study of dipole excitations and the single particle structure of neutron rich Ni isotopes
- 2008
-
Ingår i: AIP Conference Proceedings. - 1551-7616 .- 0094-243X. ; 1012, s. 389-391 453
-
Konferensbidrag (refereegranskat)abstract
- An experiment was performed using the FRS-LAND setup at GSI to study the dipole strength distributions above neutron separation threshold for neutron-rich Ni isotopes. Measurements, using the same experimental setup, were also carried out to extract single particle occupancies via knockout reactions to investigate the structure and magicity of the neutron-rich Ni isotopes. The status of the data analysis and preliminary results are presented.
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
|
|
| 9. |
|
|
| 10. |
- Fernandez, R.C., et al.
(författare)
-
Electric propulsion applications for lunar cargo missions
- 2006
-
Konferensbidrag (refereegranskat)abstract
- Different nations are currently developing a number of plans to put man back on the moon by 2020. The natural extension of returning humankind to the Moon is to create a permanent presence there. This implies that large amount of cargo must be transported on a regular basis to the Moon, so there is a need to develop new techniques to create an economical way of achieving this goal. The success of the SMART - 1 mission demonstrates Electric Propulsion as a valid propulsion method that can be employed to reduce the amount of propellant needed for the mission. This paper will study the use of Electric Propulsion in order to transport cargo to the moon, and the requirements that such systems will have to fulfill. The main advantage of using Electric Propulsion over traditional liquid/solid propellants is the reduction in the weight budget, due mainly to the reduction in the amount of propellant needed and the use of solar energy as the main power source. Electric Propulsion gives an 1sp higher than liquid or solid propellant rocket engines, with a lower thrust, with a consequent increase in the duration of the mission
|
|
