The aim of the GERDA experiment is to search for neutrinoless double beta decay of Ge-76 using High-Purity Germanium (HPGe) detectors isotopically enriched in Ge-76. The experiment is located in the Hall A of the underground Gran Sasso National Laboratory of INFN, Italy. The expected signal from the neutrinoless double beta decay is a line in the energy spectrum at the Qbb-value of the decay, 2039 keV. The background due to external sources (natural radioactivity, environmental neutrons) is minimized by operating the HPGe detectors naked in radio-pure liquid argon, acting as a coolant and as a passive shielding. The cryostat containing the liquid argon is enclosed in a stainless steel tank (10 m diameter) filled of water. The water volume serves as additional passive shielding and is operated as a Cherenkov detector to veto muon-induced events.
The experiment was under commissioning between June 2010 and November 2011. The physics data taking is ongoing since November 2011, with about 15 kg of enriched Ge-76 detectors deployed. The data taking is expected to last for about 5 years (with progressive improvements of the set-up). In the next phase(s) of the experiment, new custom-made detectors will be deployed and the liquid argon volume will be operated as an active veto, by detecting the argon scintillation light by means of photo-multipliers.
Acceptable Use Policy
AUP of the Virtual Organization GERDA
The goal of the Virtual Organization (the “VO”) gerda.mpg.de is to provide access to the existing computing and storage resources of the European Grid Infrastructure (EGI) to the GERDA Collaboration community and to facilitate collaboration among different research groups. Members and managers of the VO agree to be bound to the GRID Acceptable Use Policy, the various security policies and other relevant EGI policies, and to use the EGI Intrastructure only in the furtherance of the stated goal of the VO.
In particular, by registering with the VO as a user you shall be deemed to accept these conditions of use:
1. You shall only use the EGI Infrastructure to perform work, or transmit or store data consistent with the stated goals and policies of the VO of which you are a member and in compliance with these conditions of use.
2. You shall not use the Infrastructure for any unlawful purpose and not (attempt to) breach or circumvent any GRID administrative or security controls. You shall respect copyright and confidentiality agreements and protect your access credentials (e.g. private keys, passwords), sensitive data and files.
3. You shall immediately report any known or suspected security breach or misuse of the GRID or GRID credentials to the incident reporting locations specified by the VO and to the relevant credential issuing authorities.
4. Use of the EGI Infrastructure is at your own risk. There is no guarantee that the Infrastructure will be available at any time or that it will suit any purpose.
5. Logged information, including information provided by you for registration purposes, shall be used for administrative, operational, accounting, monitoring and security purposes only. This information may be disclosed to other organizations anywhere in the world for these purposes. Although efforts are made to maintain confidentiality, no guarantees are given.
6. The Resource Providers, the VOs and the EGI operators are entitled to regulate and terminate access for administrative, operational and security purposes and you shall immediately comply with their instructions.
7. You shall comply to all the specific regulations and policies of the GERDA Collaboration, and specifically those related to data property, data usage and data blinding.
8. You are liable for the consequences of any violation by you of these conditions of use.