1,721,144 research outputs found
CUORICINO: final results
No full textCUORICINO, the predecessor experiment of CUORE, was operated in Gran Sasso National Laboratories in Italy and demonstrated the feasibility of CUORE. The CUORICINO detector was an array of large cubic TeO2 crystals summing up to the total mass of 40.7 kg. CUORICINO stopped the data taking in middle 2008. We present the CUORICINO detector performances and final experimental results in double beta decay, on ground and excited states of 130Te and on 120Te, together with the total data analysis that is of fundamental interest in the prediction of the expected CUORE background
CUORICINO results for 2νββ decay to the first excited state 0 +
No full textThe CUORICINO results for two neutrino double beta decay of 130Te to the excited state 01+ of 130Xe are presented. © 2012 Elsevier B.V
Status of the CUORE and CUORE-0 experiments at Gran Sasso
Full text linkCUORE is a 741 kg array of TeO2 bolometers for the search of
neutrinoless double beta decay in 130Te. The detector is being constructed at the Laboratori Nazionali del Gran Sasso, Italy, where it will start taking data in 2015. If the target background of 0.01 counts/(keV·kg·y) will be reached, in five years of data taking CUORE will have a half life sensitivity of ∼ 1026 y. CUORE-0 is a smaller experiment constructed to test and demonstrate the performances expected for CUORE. The detector is a single tower of 52 CUORE-like bolometers that started taking data in spring 2013. The status and perspectives of the CUORE and
CUORE-0 experiments will be presented
Toward sub-Kelvin resistive cooling and non destructive detection of trapped non-neutral electron plasma
No full textA resonant circuit tuned to a particular frequency of the motion of charged particles stored in a Penning trap and connected to a low noise amplifier allows, at the same time, cooling and non destructive detection of the particles. Its use is widely diffused when single or few particles are stored near the centre of a hyperbolic Penning trap. We present a consistent model that predicts the shape of the induced signal when the tuned circuit is used to detect and cool the axial motion of a cold non neutral plasma stored in an open-ended cylindrical Penning trap. The model correctly accounts for the not negligible axial plasma size. We show that the power spectrum of the signal measured across the tuned circuit provides information about the particle number and insights about the plasma temperature. We report on the design of a HEMT-based cryogenic amplifier working at 14.4 MHz and 4.2 K and the results of the noise measurements. We have measured a drain current noise in the range from 6 to 17 pA/ p Hz, which corresponds to an increase of the tuned circuit equivalent temperature of at maximum 0.35 K. The cryogenic amplifier has a very low power consumption from few tens to few hundreds of μW corresponding to a drain current in the range 100-800 μA. An additional contribution due to the gate noise has been identified when the drain current is below 300 μA; above that value an upper limit of the increase of the equivalent tuned circuit temperature due to this contribution of 0.02 K has been obtained. These features make the tuned circuit connected to this amplifier a promising device for detecting and cooling the axial motion of an electron plasma when the Penning trap is mounted inside a dilution refrigerator
Lowering the energy threshold of large-mass bolometric detectors
No full textLarge-mass bolometers are used in particle physics experiments to search for rare processes. The energy threshold of such detectors plays a critical role in their capability to search for dark matter interactions and rare nuclear decays. We have developed a trigger and a pulse shape algorithm based on the matched filter technique which, when applied to data from test bolometers of the Cuore experiment, lowered the energy threshold from tens of keV to the few keV region. The detection efficiency is in excess of 80%, and nearly all nonphysical pulses are rejected. © 2011 IOP Publishing Ltd and SISSA
- …
