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- 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
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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.
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