1,036 research outputs found
Preliminary results on two-dimensional interferometry of HL Tau
Preliminary two-dimensional speckle interferometry results of HL Tau were found to be qualitatively similar to those found with one-dimensional slit scanning techniques; results consist of a resolved component (approximately 0.7 arcsec in size) and an unresolved component. Researchers are currently reducing the rest of the data (taken on three different telescopes and at three different wavelengths) and are also exploring other high resolution methods like the shift and add technique and selecting only the very best images for processing. The availability of even better two-dimensional arrays within the next couple of years promises to make speckle interferometry and other high resolution techniques very powerful and exiting tools for probing a variety of objects in the subarcsec regime
Muon Collider Overview: Progress and Future Plans
Besides continued work on the parameters of a 3-4 and 0.5 TeV CoM collider,
many studies are now concentrating on a machine near 100 GeV that could be a
factory for the s-channel production of Higgs particles. We mention the
research on the various components in such muon colliders, starting from the
proton accelerator needed to generate pions from a heavy-Z target and
proceeding through the phase rotation and decay channel, muon cooling,
acceleration, storage in a ring and the collider detector. We also mention
theoretical and experimental R&D plans for the next several years that should
lead to a better understanding of the design and feasibility issues for all of
the components. This note is a summary of a report updating the progress on the
R&D since the Feasibility Study of Muon Colliders presented at the Workshop
Snowmass'96.Comment: 3 pages, 2 figures, LaTex EPAC format; to be published Proceedings of
the EPAC98 Conference, Stockholm, Sweden, June 1998. Additional information
and articles at http://www.cap.bnl.gov/mumu
Emittance growth mechanisms in the Tevatron beams
In this article we present results of emittance growth measurements in the
Tevatron beams. Several mechanisms leading to transverse and longitudinal
diffusions are analyzed and their contributions estimated.Comment: 7 p
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