Observation of Geo-Neutrinos Physics Letters B Volume 687, Issues 4–5, 19 April 2010, Pages 299-304 doi:10.1016/j.physletb.2010.03.051 (local copy; preprint on arXiv) Italian press coverage of our Geo-Neutrino research (partial list): “Le particelle che arrivano dal centro della Terra” from ANSA
Borexino homes in on neutrino oscillations (CERN Courier) Experiment at Gran Sasso provides key evidence for the solar-neutrino problem. The mystery of the “missing” solar neutrinos arose in the 1970s when the pioneering experiment by Raymond Davis and colleagues in the Homestake
On April 6, 2009 at 03:32 a.m. (local time) a strong earthquake (Ml=5.8; Mw= 6.2) hit the town of L’Aquila and its surroundings. As is well known, unfortunately the earthquake had dramatic consequences. There have been over 300 victims, thousands of injured
CNGS, the CERN to LNGS neutrino beam has been (re)started on Jun 18, 2008. Also Borexino may detect some of the neutrinos from the CNGS beam.
First real time detection of 7Be solar neutrinos by Borexino Physics Letters B Volume 658, Issue 4, 3 January 2008, Pages 101-108 doi:10.1016/j.physletb.2007.09.054 Submitted 10 August 2007, Revised 12 September 2007, Accepted 20 September 2007, Available online 5 October 2007 (local
Borexino begins data taking on May 16, 2007 at 01:25 CEST
2007-05-15 – Inside view of the Borexino detector (camera #1). Borexino filling completed today @ 11:24:55 CEST. SSS is now full of scintillator, we’re almost ready to start the DAQ!
Water Tank filling completed on May 14, 2007. We’re getting closer…
PC procurement at Sarroch completed Borexino use a solution of PPO (a flour) in PC (pseudocumene, an organic solvent) as its scintillator (active detector mass) and a solution of DMP (a quencher) in the same solvent as a buffer fluid
Borexino filling goes on: About 300 m³ of PC in the SSS. In the following picture you can see the inside of the Borexino Stainless Steel Sphere as seen from camera #1. The water inside the SSS (and Inner Vessel)
Borexino “Water Tank” filling operations have begun. Ultrapure water in the WT will serve both as a shield against the external natural radioactivity background and as a Cherenkov detector for muon veto. The picture below was taken at the beginning of
PC delivery from Sarroch to LNGS has begun. PC (pseudocumene) delivery from the production plant in Sarroch (Sardinia island, Italy) to LNGS has begun. Four special Isotanks will be used for PC transportation. They will go back and forth in
Another step completed: the Borexino Stainless Steel Sphere (SSS) has been completely filled with ultra-pure water. Next steps: replace the water with buffer liquid and scintillator; filling the Water Tank with ultra-pure water (shield).
Videos of the Borexino nylon vessels installation (Jan – May, 2004). Here are some time-lapse videos of the whole operation, as seen by Borexino’s internal CCD photo-cameras, mounted on the Stainless Steel Sphere (inside dedicated sealed chambers, with special glass
Installation of the two concentric nylon inner vessels of the Borexino detector have been completed. Both vessels have been inflated with ultra-pure, humidified nitrogen gas, which will be eventually replaced by the final liquids.
CTF2 filling (May 22 – Jun 18, 2001), time-lapse video from the CTF internal CCTV camera (consider the effects from reflection and refraction as the water level approaches and gets over the position of the camera).
How Borexino will stare at the Sun CERN Courier, 23 September 1998 A new ultra-sensitive experiment to detect solar neutrinos is being built underground in Italy. As construction at the Gran Sasso laboratory nears completion, Gianpaolo Bellini explains how the
CTF achieved records in the domain of ultra-low background, large volume detectors. These encouraging results point towards the feasibility of detectors like Borexino.