The status of the research on muon colliders is discussed and plans are outlined for future theoretical and experimental studies. Besides work on the parameters of a 3-4 and 0.5 TeV center-of-mass (COM) energy collider, many studies are now concentrating on a machine near 0.1 TeV (COM) that could be a factory for the s-channel production of Higgs particles. We discuss the research on the various components in such muon colliders, starting from the proton accelerator needed to generate pions from 1098-4402͞99͞2(8)͞081001(73)$15.00 © 1999 The American Physical Society 081001-1 PRST-AB 2 CHARLES M. ANKENBRANDT et al. 081001 (1999) a heavy-Z target and proceeding through the phase rotation and decay (p ! m n m ) channel, muon cooling, acceleration, storage in a collider ring, and the collider detector. We also present 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 report is an update of the progress on the research and development since the feasibility study of muon colliders presented at the Snowmass '96

A simple molecular fluorescent probe 5 has been designed and synthesized by appending anthracene and benzhydryl moieties through a piperazine bridge. The probe upon interaction with different metal ions showed high selectivity and sensitivity (2 ppb) for Hg(2+) through fluorescence "turn-on" response in HEPES buffer. The significant fluorescence enhancement (~10-fold) is attributable to PET arrest due to complexation with nitrogen atoms of the piperazine unit and Hg(2+) in 1:2 stoichiometry, in which a naked-eye sensitive fluorescent blue color of solution changed to a blue-green (switched-on). As a proof of concept, promising prospects for application in environmental and biological sciences 5 have been utilized to detect Hg(2+) sensitively in real samples, on cellulose paper strips, in protein medium (like BSA), and intracellularly in HeLa cells. Moreover, the optical behavior of 5 upon providing different chemical inputs has been utilized to construct individual logic gates and a reusable combinational logic circuit. The combinational circuit (switch ON mode; OR logic gate) is easily resettable to the original position (switch OFF mode; INHIBIT logic gate) by applying reset chemical inputs (OH(-) and PO4(3-)) with great reproducibility.

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In the present investigation an attempt has been madeto determine the effect of firing temperature, firing time and ingredients/additives (CaO, MgO. SiO,, Al=0.) on the swelling behaviour of iron ore pellets. For this purpose two Indian iron ore fines from Bailadila and Noamundi deposits and chemically pure iron oxide were used. From the results obtained, it is observed that the swelling of iron ore pellet is controlled by the firing temperature, firing time and additives/ingredients present in the pellet. The growth of iron whisker is contro[led by these ingredients. The presence of free lime promotes the swelling index of the pellet. KEYWORDS: swelling; whisker growth; firing temperature; firing time; iron ore; pellet crushing strength. l.

Abstract-A novel, potential and efficient microwave direct contact hyperthermia applicator referred to as water-loaded box-horn for therapeutic heating of bio-medium is designed and developed at 915 and 2450 MHz. Also, theoretical expressions for fields in bio-medium as produced by a direct contact box-horn applicator have been derived using plane wave spectral technique. The box-horn is a special type of dual mode horn antenna which supports TE 10 -and TE 30 -modes. Therefore, the aperture field distribution over the H-plane of the box-horn is nearly uniform which prevents steep temperature gradients in the heating medium. Water-loading of the box-horn provides a better impedance match to the bio-medium and hence better coupling of microwave energy into bio-medium. Also, it reduces the size of box-horn applicator considerably. The SAR distributions in bio-medium in direct contact with water-loaded box-horn have been computed theoretically with the developed analytical model and measured experimentally with the help of Agilent/HP vector network analyzer (8714 ET) at 915 and 2450 MHz. The theoretical and experimental results for SAR are in nearly in agreement with each other. It is investigated that higher penetration depth, lower power absorption coefficient and higher half-power width/depth or lower resolution in heating medium are found for box-horn designed at 915 MHz in comparison to those for box-horn designed at 2450 MHz.

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In the present investigation an attempt has been madeto study the swelling behaviour of iron oxide pellets madefrom chemically pure iron oxide and natural ore from Bailadila Mines. Thetests