Prime pagine RA2010FUS:Copia di Layout 1 - ENEA - Fusione

magnetic confinement (cont’d.)
progress report
2010
011
1.1 FTU Facility
Summary of the machine operation
The first experimental campaign started at the end of March but it was immediately stopped due to a leak
in the vacuum chamber. After that a long series of vacuum problems prevented operations from being
restarted until mid–June. The experimental campaign went on until the end of June, when it was closed due
to problems to the motor flywheel generator (MFG1) chiller.
The restart of the machine, originally scheduled for the end of October, began mid November, but,
unfortunately, the 141 pulses done (51 of which for plant tests) turned out to be useless for the experimental
campaign, because of several hardware failures. The main problem encountered was a broken electronic card
of the Programmable High Speed Controller (PHSC) which controls the poloidal power supplies: since it
required long time for reparation, this led to the end of the experimental campaign.
Therefore, the statistics considered for 2010 are those of the first experimental campaign: 320 shots were
successfully completed, out of a total of 349 performed in 12.5 experimental days. The average number of
successful daily pulses was 25.60. Table 1.I reports the summary data. Figure 1.1 reports the source of
downtime in 2010: Power Supplies is the greatest cause of delay with 31% of the total.
Control and Data Acquisition System. The project of replacing ageing hardware on Frascati Tokamak
Upgrade (FTU) and improving the software infrastructure in the control and data acquisition area, is still
under way. It is mainly based on the principles of the open source software and commodity hardware.
The physical link between the lower and the medium level in the FTU
control system three–level standard model – historically relying on
RS232 protocol on fiber optics – was replaced with serial
communication on standard Ethernet by using a new device
which provides network access to industrial instruments through
a serial connection. The technology has also allowed dedicated
hardware to be replaced by using machine virtualization on a
single Linux host.
A high multiplexed channel density and few kHz lower hybrid
(LH) power data acquisition systems were developed in
Compact PCI standard. Moreover, the legacy Soft–X VME
data acquisition system CPU was renewed by developing at the
same time a new software interface based on open source
Universe II libraries, and a more user friendly management
system.
Figure 1.1 – Source of downtime in 2010.
Power supplies is the greatest cause of delay
with 31% of the total