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