MULTI OPTICAL TRANSITION RADIATION SYSTEM FOR ATF2

In this paper we describe the calibration tests, software development and first measurements of a Multi Optical Transition Radiation System (mOTR) located in the beam diagnostics section of the extraction line (EXT line) of ATF2, installed in close proximity to an existing multi wire scanner system (WS). The mOTR system is currently in routine operation. Its beam profile data are being used to generate beta matching and 2D emittance measurements. In addition to lattice diagnostics, these data also form the basis for the coupling correction system. The emittance measurement itself is fully automated and takes less than a minute to perform. This system is advantageous over the WS system due to its speed of operation (the data coming from single-shot measurements). We are currently developing algorithms to allow for 4D emittance reconstruction, which we will be testing this autumn with crosschecks from the WS system.