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Modification of the ALS booster synchrotron for an experiment on optical stochastic cooling

Modifications to the Booster synchrotron of the Advance Light Source of the Lawrence Berkeley National Laboratory have been made in preparation for a test of the optical stochastic cooling in a single pass beam line, planned for installation in the extraction area of the synchrotron. Electron beam acceleration to 650 MeV, synchrotron radiation cooling at 650 MeV, and deceleration to 200 MeV have been demonstrated. Measurements have been made of the beam horizontal and vertical emittances and beam energy spread in the beam extracted from the synchrotron at 200 MeV and 250 MeV and compared with computer simulation results.