LVD
Collaboration
Laboratory: LNGS-Gran Sasso National Laboratory
National Responsible: A. Zichichi
1. Goal of the experiment.
The LVD experiment was conceived with a twofold purpose: the study of high energy cosmic ray processes deep underground and the study of low energy neutrino bursts, typically originated in the Super Nova gravitational stellar collapses.
2.
Activities during 2002
The LVD experiment, in the final configuration of 3 towers (~1
kton of active mass), has taken data with an average duty cycle of more than
99.5% monitoring the Galaxy for Super Nova stellar collapses. No such event has
been observed.
In the framework of the SNEWS network, dedicated to the
simultaneous detection of the Supernova events, we analyzed the data collected
during the tests with SuperKamiokande and SNO and we investigated on the proper
way to have a computer server with a very high security level. That is a very
strict requirement from our SNEWS partners in order to start automatic alert.
The study on doped liquid scintillator continued. We put one
tank in the tunnel in order to study the effects of the natural radioactivity.
The following achievements have been obtained:
(*) The automatic SuperNova alert will start as soon as the security of the LNGS server will be certified.
(**) We couldnt complete the work due to lack of funding
Milestones 2003
Data taking at the highest efficiency and uptime | 31-12-2003 |
Upgrade of the clock distribution system and synchronization to TDCs. | 31-12-2003 |
Continuation of collaboration in the SNEWS system. | 31-12-2003 |
3. INFN contribution to the experiemnt in terms of manpower and financial support
- Manpower: 25 researchers (12.5 FTE), 3 technicians (2 FTE)
- Budget for the Year 2003: 1.6 % of the CSN2 budget for 2003
4. Publications in refereed journals (in 2002): 1
5. Conference talks (in 2002): 2
6. Number of undergraduate and doctoral theses on the experiment
Laurea diplomas: 1
7. Leadership roles and primary responsibilities in the experiment
Spokeperson and Chairman of the Executive Committee (A. Zichichi), Chairman of the Analysis Committee (P. Galeotti), Chairman of the Technical Committee (P. Giusti).
8. Innovative instruments
The LVD collaboration has set up in the Gran Sasso Laboratory a plant for the production of the good quality and inexpensive liquid scintillator needed for the experiment. Nowadays it is used to develop new liquid scintillators with improved characteristics by using various dopants.
9. Competing experiments
Relative to the detection of low energy neutrino bursts, the main competing experiments are SuperKamiokande, SNO, AMANDA and, until the end of 2000, MACRO. LVD compares well with respect to these experiment due to its following characteristics:
10. International Committee which has reviewed the experiment.
The LVD experiment has been reviewed and approved by the LNGS International Scientific Committee.