Department of Commerce, Mountain Administrative Support Center, Procurement Division, MC3, 325 Broadway, Boulder, CO 80303-3328

R -- NONNEUTRAL PLASMA PHYSICS EXPERIMENTS IN PENNING TRAPS SOL NB847000600084 DUE 022396 POC Jacqueline Wright (303) 497-5282 The ion storage group in the Time and Frequency Division at the National Institute of Standards and Technology (NIST), is looking for someone to conduct nonneutral plasma physics experiments in Penning traps. This work receives other agency support and supports the divisions efforts on frequency standards. The nonneutral plasma physics work involves two different experiments. In the first experiment, a careful experimental study of the plasma modes of laser-cooled, spheroidal Penning trap plasmas (Be+ or Mg+) will be done. These modes are interesting theoretically because they can be calculated exactly. They are also interesting experimentally because they provide diagnostic information on the plasma shape and density. Of particular interest are the asymmetric (m=/0) modes because these modes may be used to change the plasma angular momentum and therefore possibly control the plasma rotation frequency, density and shape. The second experiment seeks to demonstrate the trapping and sympathetic cooling of positrons in a Penning trap by laser cooled Be+ ions. The person conducting the experiments must have previous experience and be an expert in nonneutral plasma physics. Work with nonneutral ion plasmas is extremely useful. Experience with techniques (such as the ''rotating wall'' technique) for stabilizing and controlling the plasma rotation frequency will be very useful for studying whether the asymmetric modes can be used to control the plasma shape and density. Extensive hands-on experience with the set-up and operation of frequency doubled CW dye lasers with wavelengths in the ultraviolet is a necessity for the completion of this work. This is not a request for quotes. Written responses must be received in this office within 15 days and must contain sufficient information to clearly establish ability to provide the necessary service. No award will be made on the basis of proposals received in response to this notice. In the absence of other qualified sources, it is the intent of the government to negotiate a sole source basis with Xias-Pei Houng, University of California, San Diego, La Jolla, CA 92093. (0025)

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