Abstract--The ALICE High Momentum Particle Identification (HMPID) detector, presently under construction, consists of seven identical proximity focusing RICH counters, covering in total 11 m 2 and exploiting large area CsI photocathodes for Cherenkov light imaging. The detector design, assembly and quality checks will be presented, with particular emphasis on the CsI photocathodes production and validation procedure. Performance studies in beam tests of the produced detector modules and results on ageing of CsI photocathodes due to ions bombardment will be discussed.
Air samples collected at the second Bosporus bridge of Istanbul which carries a heavy traffic load between Asia and Europe, were analyzed for 22 elements by the INAA method. Pb, Cd and Fe concentrations in the samples were determined by AAS. Iron concentrations were used as a cross check between the two methods. In order to define the enrichment factors for the elements in the bridge area, a sample collected from our university campus which can be considered as a rural site, was also analyzed. Differences were observed especially for Br, A1, Mg, Ti, Cu and Na between the two sites. Based on the results of the samples from the bridge, we got a value of 0.58(16) for the Br/Pb-ratio.
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