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To remove arsenic from water we are developing a research project that applies magnetic separation methods. In order to increase the removal efficiency we are using magnetic aggregates. These magnetic aggregates are iron-based and were all (except for one) prepared by us. In this paper we report the preparation steps and some of the results of the characterization and absorption tests we have performed in order to conclude about its structure and efficiency in what concerns arsenic removal. Index Terms--Arsenic removal, characterization of magnetic materials, iron oxides, magnetic aggregates, magnetic separation, preparation of magnetic materials, testing.

A wide-bored conduction-cooled superconducting magnet with operating current of 116 A is designed, fabricated and tested for the material processing devices. A second-stage GM cryocooler with the second-stage cooling power of 1 W is used to cool the superconducting magnet from room temperature to 4.2 K.

Several different shell types Nb(sub 3)Sn coils are developed and installed in a mirror magnet configuration and tested at Fermilab. The results show that the previously suspect splice technique is adequate and is not responsible for the quench performance limitation.

The main quadrupole magnets in the Q1 (LQXA) and Q3 (LQXC) assemblies are MQXA elements designed and fabricated by KEK and Toshiba, while those in the Q2 (LQXB) assemblies are MQXB quadrupoles designed and fabricated by Fremilab. The cold test results of LQXB02 and an overview of the magnetic measurements results of the cold masses built up to date are presented.