| Modality of access under this proposal | |||||||||||||||||||||
In the building room where facilities are located, a meeting room and a visitor room are available and can be booked during user stay. Furthermore, control room is equipped with PC (including internet), provided by the infrastructure. The TSF and TSF-f facilities offer substantial manpower for support of external users. As they are cryogenic installations, some special features of these facilities are to be carefully described to users, so that they can get more familiar with cryogenic constraints. While the time
scale for TSF is typically of the order of month, it is reduced to order
of day for TSF-f. For TSF, allocated time can be divided in different
periods: (i) assembling and cabling of new components/instrumentation,
(ii) vacuum and cool-down of the experiment and (iii) running period;
(iv) eventually a warm-up period is necessary before removing the experiment
from the cryostat. The running period, dedicated to the experiment itself,
is usually of the order of few days, which is generally sufficient to
acquire lots of data, as using liquid helium (the fluid with the lowest
kinematic viscosity) enables a drastic reduction in space and time scale.
The working periods of external users can not be chosen freely and they
are supposed to coordinate with our own research projects. For the proposed
time, the complete facility is reserved exclusively for the external user
and there is no need to share with other working groups. In case the user
wishes to insert a new sensor in the TSF facility, this sensor should
be first tested in the TSF-f facility for validation. |
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Support offered under this proposal : The SBT permanent staff is composed of fifty two persons, all working in the field of cryogenics. Various collaborations enable CEA/SBT to take part in national and international projects such as Large Hadron Collider (LHC) at CERN, ITER, Laser Mégajoule (LMJ), HERSCHEL and TSF. Taking benefit of this large cryogenic team, unexperienced (in cryogenics) external users will receive a one or two day training course on cryogenic constraints. Two engineers (one experienced in large refrigeration, the other experienced in superfluid turbulent flows) will supervise the access, while two full time technicians + one partial time CAD designer will install the experiment in the tunnel. CEA buildings are located in a vast scientific area with all the infrastructure necessary for scientific work: more than 6000 scientists (from CEA, CNRS, ILL, ESRF) work in this area. CNRS/Institut Neel is located a few meters far from CEA, with the great expertise in cryogenic turbulence, and LEGI is only a few kilometres far from CEA. Outreach of new users: see www.eutche.eu and networking activities. Review procedure under this proposal: see networking activities. |
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Unit of Access: the unit of access given here is the day. However, concerning the TSF facility, the reference time for the access is 5 weeks: 2 weeks dedicated to installation and verification of the correct operation of all diagnostics; 2 weeks are dedicated to the experiment itself; then one week is dedicated to warm up and decommissioning. In case the experiment is lighter, then it could be imagined to divide this typical time for access by two (ie: 2 weeks and a half). For the TSF-f facility the unit of access is again the day, but in that case a one week, or a two-week experiment could be considered, depending of course of the complexity. |