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Berkeley Projects

Berkeley's KamLAND Projects

Particles are detected by electric pulses coming from 2000 photomultiplier tubes (pmts) in KamLAND. A team of Berkeley engineers and physicists designed and built electronics optimized to get the most information possible from the pmts. 
In order to correctly interpret the data, well characterized sources of events are deployed into the detector. A safe and accurate system to deploy sources was designed in part by a team from Berkeley.
Data Processing
Even though neutrino events are few and far inbetween, KamLAND records ~30 events a second which translates into more than 200GB of data a day. This data needs to be stored, analyzed and processed into physical quantities such as, time and charge, vertexes and finally neutrino candidate events. Collaborators at Berkeley have worked with NERSC to utilize the HPSS data storage system and PDSF processing facilities.
Data Analysis
As the raw data is processed into higher levels of information, it takes time to put together the data, the physics, and the knowledge of the detector's response to produce an answer. Berkeley physicists have been heavily involved with their collaborators in all levels of the analysis.

Muon Tracking
Cosmic ray muons incident on the KamLAND detector are presently identified by the high levels of charge deposited in the inner and outer PMT arrays. Muon trajectories are inferred from the charge arrival time distributions, and this data will be used to calibrate the muon reconstruction algorithm used for the main detector, and to measure the efficiency of the muon tagging procedure.