Cs Feed Tests and Emittance Measurements on a Modified MC-SNICS Ion Source for Radiocarbon AMS

We report on 2 recent developments in an ongoing program of characterizing and improving the National Electrostatics Corp. (NEC) MC-SNICS ion source at University of California (UC) Irvine's Keck AMS laboratory. First, we have investigated the possibility of modifying a large-body (134-sample) MC-SNICS to incorporate the UC Irvine Cs oven and vacuum-insulated Cs feed tube, which provide better confinement of Cs than the standard NEC setup. In our 40-sample source, the feed tube enters the source housing directly below the ionizer assembly. This area cannot be accessed for machining on the 134-sample source, but we have successfully tested a modified geometry where the delivery tube enters the body via the source end flange. Second, we recently installed a second beam profile monitor in the injection line of our spectrometer to allow us to make online emittance measurements. At full output (150 μA of C− at 55 keV), the emittance of our source at 8 kV sputtering voltage is approximately 40π mm mrad.

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Design of the beam profile monitor system for the RHIC injection line

Proceedings Particle Accelerator Conference ◽

10.1109/pac.1995.505627 ◽

2002 ◽

Cited By ~ 4

Author(s):

R.L. Witkover

Keyword(s):

Beam Profile ◽

Monitor System ◽

Beam Profile Monitor ◽

Injection Line

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Novel Nanolipoidal Systems for the Management of Skin Cancer

Recent Patents on Drug Delivery & Formulation ◽

10.2174/1872211314666200817115700 ◽

2020 ◽

Vol 14 (2) ◽

pp. 108-125

Author(s):

Apoorva Singh ◽

Nimisha

Keyword(s):

Skin Cancer ◽

Survival Rates ◽

Cancer Therapeutics ◽

The Body ◽

Surgical Removal ◽

The Novel ◽

Skin Cancers ◽

Recent Developments ◽

Abnormal Cells ◽

The Stability

: Skin cancer, among the various kinds of cancers, is a type that emerges from skin due to the growth of abnormal cells. These cells are capable of spreading and invading the other parts of the body. The occurrence of non-melanoma and melanoma, which are the major types of skin cancers, has increased over the past decades. Exposure to ultraviolet radiations (UV) is the main associative cause of skin cancer. UV exposure can inactivate tumor suppressor genes while activating various oncogenes. The conventional techniques like surgical removal, chemotherapy and radiation therapy lack the potential for targeting cancer cells and harm the normal cells. However, the novel therapeutics show promising improvements in the effectiveness of treatment, survival rates and better quality of life for patients. Different methodologies are involved in the skin cancer therapeutics for delivering the active ingredients to the target sites. Nano carriers are very efficient as they have the ability to improve the stability of drugs and further enhance their penetration into the tumor cells. The recent developments and research in nanotechnology have entitled several targeting and therapeutic agents to be incorporated into nanoparticles for an enhancive treatment of skin cancer. To protect the research works in the field of nanolipoidal systems various patents have been introduced. Some of the patents acknowledge responsive liposomes for specific targeting, nanocarriers for the delivery or co-delivery of chemotherapeutics, nucleic acids as well as photosensitizers. Further recent patents on the novel delivery systems have also been included here.

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Chaos in body–vortex interactions

Proceedings of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rspa.2009.0619 ◽

2010 ◽

Vol 466 (2119) ◽

pp. 1871-1891 ◽

Cited By ~ 24

Author(s):

Johan Roenby ◽

Hassan Aref

Keyword(s):

Body Shape ◽

Mass Density ◽

Relative Equilibrium ◽

Large Body ◽

Point Vortex ◽

Cylindrical Body ◽

The Body ◽

Body Motion ◽

Single Vortex ◽

Vortex Interactions

The model of body–vortex interactions, where the fluid flow is planar, ideal and unbounded, and the vortex is a point vortex, is studied. The body may have a constant circulation around it. The governing equations for the general case of a freely moving body of arbitrary shape and mass density and an arbitrary number of point vortices are presented. The case of a body and a single vortex is then investigated numerically in detail. In this paper, the body is a homogeneous, elliptical cylinder. For large body–vortex separations, the system behaves much like a vortex pair regardless of body shape. The case of a circle is integrable. As the body is made slightly elliptic, a chaotic region grows from an unstable relative equilibrium of the circle-vortex case. The case of a cylindrical body of any shape moving in fluid otherwise at rest is also integrable. A second transition to chaos arises from the limit between rocking and tumbling motion of the body known in this case. In both instances, the chaos may be detected both in the body motion and in the vortex motion. The effect of increasing body mass at a fixed body shape is to damp the chaos.

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