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Bassanese, S.

Paper Title Page
PM10 Characterisation of Fast Faraday Cups at the ELETTRA Linac 113
 
  • M. Ferianis, S. Bassanese, G. D'Auria
    ELETTRA, Sincrotrone Trieste, Trieste, Italy
  • C. Deibele
    SNS, Spalation Neutron Source, Oak Ridge, TN, USA
  • M. Poggi
    INFN-LNL, Laboratori Nazionali di Legnaro, Legnaro, Italy
 
  A major upgrade of the ELETTRA injector is currently on going: the 1 GeV LINAC will be replaced with a 100 MeV LINAC and a 2.5 GeV Booster Synchrotron. A new set of diagnostics is now under development for these two new machines. The new Fast Tune measurement system for the Booster represents a significant improvement as compared to the present Tune measurement system. With the Booster cycling at 3 Hz, horizontal and vertical tunes have to be measured during the energy ramp, whose duration is 160 ms. To completely characterise the dynamics of the Booster during the energy ramp, a set of 25 tune values has been required, corresponding to a 6.4 ms interval between successive measurements. The accuracy of this measurement is <10-3. Such frequency spans are achievable using a Real Time Spectrum Analyser (Tektronix 3026), which is a fast sampling instrument with built-in FFT algorithm and data presentation. In this paper, after describing the system specifications and architecture, we present the results of the preliminary tests, which have been carried out both in the laboratory and on the Storage Ring.  
PT25 Fast Tune Measurement System for the ELETTRA Booster 231
 
  • M. Ferianis, S. Bassanese, F. Iazzourene
    ELETTRA, Sincrotrone Trieste, Trieste, Italy
 
  Since several years, the Diagnostic Group at Laboratori Nazionali di Legnaro (LNL) has been designing Fast Faraday Cups (FFC) to be used on their Heavy Ion Accelerators; latest developments in this field include a stripline FFC, jointly developed with SNS, Oak Ridge. A collaborative partnership has been set-up between LNL and ELETTRA Laboratory to fully characterize new FFCs, using as electron source the ELETTRA 1 GeV Linac. Two FFCs, the stripline FFC, built at SNS, and a coaxial FFC, made at LNL, have been installed at ELETTRA who provided the wideband data acquisition and the remote control of the measurement. The first measurements carried out using 1 GHz oscilloscope allowed the proper set-up of remote control and a low jitter triggering. Wideband measurements were performed with a sampling scope equipped with 50 GHz head whereas the bandwidth of the stripline FFC is in the order of 10 GHz. A complete set of tests has been carried both on the coaxial FFC and on the stripline FFC. Thanks to the information provided by these wideband measurements, the Linac working point has been further optimized as well as the injection process into the ELETTRA SR.