5 research outputs found
BULLKID: Monolithic array of particle absorbers sensed by Kinetic Inductance Detectors
We introduce BULLKID, an innovative phonon detector consisting of an array of
dices acting as particle absorbers sensed by multiplexed Kinetic Inductance
Detectors (KIDs). The dices are carved in a thick crystalline wafer and form a
monolithic structure. The carvings leave a thin common disk intact in the
wafer, acting both as holder for the dices and as substrate for the KID
lithography. The prototype presented consists of an array of 64 dices of
5.4x5.4x5 mm carved in a 3" diameter, 5 mm thick silicon wafer, with a
common disk 0.5 mm thick hosting a 60 nm patterned aluminum layer. The
resulting array is highly segmented but avoids the use of dedicated holding
structures for each unit. Despite the fact that the uniformity of the KID
electrical response across the array needs optimization, the operation of 8
units with similar features shows, on average, a baseline energy resolution of
eV. This makes it a suitable detector for low-energy processes such as
direct interactions of dark matter and coherent elastic neutrino-nucleus
scattering
Molte proprietĂ semplici individuate e dimostrate dagli studenti attraverso ragionamenti concreti simili a quelli naturali. Scelta e uso dei simboli. Sviluppo dell'autostima degli studenti
Pollution by anaesthetic gases in operating theatres Measurement of personal exposure and monitoring of the environment
Translated from Italian (Ann. Ist. Super. Sanita. 1983 v. 19(2-3) p. 361-368)SIGLEAvailable from British Library Document Supply Centre- DSC:9022.381(HSE-Trans--12060)T / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Low-energy spectrum of the BULLKID detector array operated on surface
International audienceWe present the first continuous operation in a surface lab of BULLKID, a detector for searches of light Dark Matter and precision measurements of the coherent and elastic neutrino-nucleus scattering. The detector consists of an array of 60 cubic silicon particle absorbers of 0.34 g each, sensed by cryogenic kinetic inductance detectors. The data presented focusses on one of the central elements of the array and on its surrounding elements used as veto. The energy spectrum resulting from an exposure of 39 hours to ambient backgrounds, obtained without radiation shields, is flat at the level of counts / keV kg days down to the energy threshold of eV. The data analysis demonstrates the unique capability of rejecting backgrounds generated from interactions in other sites of the array, stemming from the segmented and monolithic structure of the detector
BULLKID: Monolithic array of particle absorbers sensed by Kinetic Inductance Detectors
International audienceWe introduce BULLKID, an innovative phonon detector consisting of an array of dices acting as particle absorbers sensed by multiplexed Kinetic Inductance Detectors (KIDs). The dices are carved in a thick crystalline wafer and form a monolithic structure. The carvings leave a thin common disk intact in the wafer, acting both as holder for the dices and as substrate for the KID lithography. The prototype presented consists of an array of 64 dices of 5.4x5.4x5 mm carved in a 3" diameter, 5 mm thick silicon wafer, with a common disk 0.5 mm thick hosting a 60 nm patterned aluminum layer. The resulting array is highly segmented but avoids the use of dedicated holding structures for each unit. Despite the fact that the uniformity of the KID electrical response across the array needs optimization, the operation of 8 units with similar features shows, on average, a baseline energy resolution of eV. This makes it a suitable detector for low-energy processes such as direct interactions of dark matter and coherent elastic neutrino-nucleus scattering