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Scientific Report 2007-2009
Laboratories and Facilities of the Department of Physics
Servizio Progettazione Meccanica - Servizio Officina Meccanica
The SPM (Servizio Progettazione Meccanica - Mechanical Engineering
Service) provides engineering and design skills to the experimental
groups of the INFN Section and of the Physics Department, according to the
Convention between INFN and the Department. The Service evolved with time,
changing from the old drawing boards to modern CADs systems, and acquiring
more and more competence as required by the more and more complex
experiments in which physicist of INFN and Physics Department are involved.
Today, the Service has a staff of one engineer and five technicians, under the
direction of the Chief Engineer Corrado Gargiulo, and can provide skills regarding
the dynamical analysis of complex structures, the design and realization of
high precision mechanical parts, the engineering of parts compliant with the
standards of the space industry, and also cryogenics, or high vacuum and high
cleanliness systems. The design and simulation tasks are performed on a cluster
of several workstation where all the most common CAD softwares are running:
AutoCAD, INVENTOR, I-DEAS, CATIA. Moreover, also the ANSYS program
is available for FEM simulation and analysis. The staff of the Service follows all
Figure 1: A clean box for the preparation
of sensing crystals in CUORE experiment.
phases of realization of a piece, from its design, to material procurement, to the tender for firms, to the actual construction,
up to the integration and commissioning into the experimental system of the parts that have been produced. Since its birth
the SPM participated to the most important experimental activities of INFN and gave its contribution also to many experiments
carried by physicists of the Department. Currently, members of the staff play an important role in the engineering
teams of experiments such as AMS, CUORE, and Virgo. For instance, since 2008 Corrado Gargiulo is responsible of the
integration at CERN of the AMS experiment that will fly on the International Space Station.
The SOM (Servizio Officina Meccanica - Machine Shop Service) of
the INFN Section is an extended machine shop facility which is in charge of nine
technicians that provide generic mechanical support to INFN and Department
experiments and work also directly in building and commissioning parts of
experimental systems, both on site and around the world.
The Servizio Meccanico is equipped with four milling machines, one of which,
the C.B.Ferrari A15, has five axis with a CNC control and a precision of 20
microns over a range of 30 cm, four lathes, two of which are high precision
tooling machines: the Shaublin 150 and the Shaublin 180 CCN. Moreover, a
section of the machine shop is dedicated to metrology, with a Poly Galaxy Diamond
3D Measuring Machine (measuring volume: 0.5 m 3 , precision ≃ 2µm),
a Hommelwerke roughness meter and a Mitutoyo L.H. 600 linear height meter
(precision ≃ 1µm, range 972 mm). Moreover, in the machine shop area two
clean rooms are located: a class 10000 clean room which has been used to integrate
parts of ATLAS, AMS and ALICE experiments, and a class 100 clean
Figure 2: Design of the AMS Star Tracker.
room, with a hut where the class 1 is reached. The class 100 room has been
built to develop Virgo payloads and is used now to study new parts for second
and third generation gravitational wave interferometers.
The machine shop has also a room dedicated to a washing
machine, equipped with a plant providing clean, demineralized
water. A small unit providing ultrapure water is also placed in
the class 100 clean room.
Other two services provided by the machine shop are a welding
station (Plasma, T.I.G., soft welding) and two ovens for thermal
treatments in air.
The Service participates in almost all the experimental activities
of the INFN Section and gives important contributions also to
the Department physicists, according to the convention between
INFN and Department. For instance, the machine shop staff provided
an important technical support to the Cosmic Microwave
Background group in the Department.
Figure 3: The C.B.Ferrari A15 milling machine
Sapienza Università di Roma 196 Dipartimento di Fisica