We propose to build a small storage ring for the accumulation of antiprotons produced in an external target. Stochastic and electron qooling will be used to reduce the transverse and longi tudinal phase space of the antiprotons. The dynamics of stochastic and electron cooling will also be studied in this storage ring using circulating protons. The cooled antiprotons can be rein jected into the main ring or energy doubler ring: after simultane ous acceleration along with a proton bunch the accelerator will become a colliding pp machine with a center of mass energy range 10 32 l of 300-2600 GeV. Luminosities in the range 10 29-cm-2 sec are expected.

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To increase the available photon flux density for users, alternate lattice tunings of the Aladdin synchrotron light source have been developed with horizontal emittances significantly lower than the present value of 127 π nmrad. Reduction of the horizontal emittance by a factor of three has been obtained experimentally. When the fourth harmonic Landau cavity is used to lengthen the bunch, the observed beam lifetime with the new lattice is not significantly changed from that of the existing lattice. The present goal is to achieve a factor of four horizontal and a factor of two vertical emittance reduction routinely. Progress in making this new configuration fully operational is discussed, including the use of quadrupole shunts with correction software for betafunction and dispersion correction, understanding of a mode coupling instability in higher-harmonic RF systems, RF clearing of ions, and fabrication of new optical monitoring stations.

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