Development of a Li<sub>2</sub>MoO<sub>4</sub>scintillating bolometer for low background physics

Cardani, L.; Casali, N.; Nagorny, S.S.; Pattavina, L.; Piperno, G.; Баринова, О.П.; Beeman, J. W.; Bellini, F.; Danevich, F.A.; Domizio, S. Di; Gironi, L.; Kirsanova, S.V.; Orio, F.; Pessina, G.; Pirro, S.; Rusconi, C.; Tomei, C.; Tretyak, V. I.; Vignati, M.

doi:10.1088/1748-0221/8/10/p10002

Cited by 88 publications

(97 citation statements)

References 37 publications

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“…According to our predictions, the geometry with the largest active volume (geometry (3)) provides the highest detection efficiency. The active volume of geometry (2) is about 60% of the one of geometry (3), and this results in a similar decrease of the efficiency. On the contrary, given the ratio between the active volume of geometry (1) and geometry (3), we would have expected an efficiency of 4% for the 25 nm KID.…”

Section: Efficiency Optimizationmentioning

confidence: 82%

“…After the lift-off, we cut the Si wafer into a 2×2 cm 2 chip, that is assembled in a copper structure using insulating PTFE elements, as shown in Figure 1. The detectors are cooled below the critical temperature using a 3 He/ 4 He dilution refrigerator with base temperature of about 10 mK. The output signal is fed into a CITLF4 SiGe low noise amplifier [16], which is thermally anchored to the 4 K plate of the cryostat.…”

Section: Results Of the First Phase: Aluminum Kidsmentioning

confidence: 99%

“…A possible solution consists in equipping the bolometer with a light detector, that enables particle identification exploiting the different light emission of α's, electrons and nuclear recoils. This technique has been successfully exploited for bolometers emitting scintillation light, like ZnSe [1], ZnMoO 4 [2], LiMoO 4 [3] Email address: laura.cardani@roma1.infn.it (L. Cardani) and many others. The scintillation crystals were coupled to light detectors made by thin Germanium disks equipped with Neutron Transmutation Doped Germanium sensors, that show a typical intrinsic energy resolution of about 80 eV RMS [4].…”

Section: Why New Cryogenic Light Detectors?mentioning

confidence: 99%

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New application of superconductors: High sensitivity cryogenic light detectors

Cardani

Bellini

Casali

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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In this paper we describe the current status of the CALDER project, which is developing ultra-sensitive light detectors based on superconductors for cryogenic applications. When we apply an AC current to a superconductor, the Cooper pairs oscillate and acquire kinetic inductance, that can be measured by inserting the superconductor in a LC circuit with high merit factor. Interactions in the superconductor can break the Cooper pairs, causing sizable variations in the kinetic inductance and, thus, in the response of the LC circuit. The continuous monitoring of the amplitude and frequency modulation allows to reconstruct the incident energy with excellent sensitivity. This concept is at the basis of Kinetic Inductance Detectors (KIDs), that are characterized by natural aptitude to multiplexed read-out (several sensors can be tuned to different resonant frequencies and coupled to the same line), resolution of few eV, stable behavior over a wide temperature range, and ease in fabrication. We present the results obtained by the CALDER collaboration with 2×2 cm 2 substrates sampled by 1 or 4 Aluminum KIDs. We show that the performances of the first prototypes are already competitive with those of other commonly used light detectors, and we discuss the strategies for a further improvement.Keywords: Kinetic Inductance Detectors, light detector, background reduction, Dark Matter, Neutrinoless Double Beta Decay Why new cryogenic light detectors?Background reduction is becoming more and more important for all the experiments looking for rare events, such as dark matter interactions, neutrino-less double beta decay (0νDBD), or rare α decays. Among the several technological approaches proposed for these searches, cryogenic calorimeters (or bolometers) stand out for their excellent energy resolution (of the order of 0.1%) and for the possibility of probing different compounds; the crystals operated as bolometers can be grown starting from most of the possible 0νDBD candidates or rare-α emitters, and from several interesting targets for dark matter search.Bolometers can be equally sensitive to α's, electrons and, if the threshold is low enough, also to nuclear recoils. This could be an advantage, as experiments designed for a specific purpose could be competitive also in other physics sectors. On the other hand, the lack of tools to identify the nature of the interacting particles prevents an efficient background suppression. A possible solution consists in equipping the bolometer with a light detector, that enables particle identification exploiting the different light emission of α's, electrons and nuclear recoils. This technique has been successfully exploited for bolometers emitting scintillation light,

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Section: Efficiency Optimizationmentioning

confidence: 82%

Section: Results Of the First Phase: Aluminum Kidsmentioning

confidence: 99%

Section: Why New Cryogenic Light Detectors?mentioning

confidence: 99%

See 1 more Smart Citation

New application of superconductors: High sensitivity cryogenic light detectors

Cardani

Bellini

Casali

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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“…Because TeO 2 crystals do not produce scintillation light, the simplest approach would be to move to other scintillating crystal compounds that contain other 0νDBD candidate isotopes. Several studies demonstrated that crystals such as ZnSe [4] ( 82 Se), ZnMoO 4 [5] or LiMoO 4 [6] ( 100 Mo) and others, satisfy these requirements. These studies were performed with light detectors composed by Si or Ge slabs operated as thermal detectors and equipped with neutron-transmutation-doped Ge termistors as sensors.…”

Section: Introductionmentioning

confidence: 99%

CALDER: Cryogenic light detectors for background-free searches

Domizio

Bellini

Cardani

et al. 2018

AIP Conference Proceedings

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High sensitivity phonon-mediated kinetic inductance detector with combined amplitude and phase read-out Applied Physics Letters 110, 033504 (2017) Abstract. CALDER is a R&D project for the development of cryogenic light detectors with an active surface of 5x5cm 2 and an energy resolution of 20 eV RMS for visible and UV photons. These devices can enhance the sensitivity of next generation large mass bolometric detectors for rare event searches, providing an active background rejection method based on particle discrimination. A CALDER detector is composed by a large area Si absorber substrate with superconducting kinetic inductance detectors (KIDs) deposited on it. The substrate converts the incoming light into athermal phonons, that are then sensed by the KIDs. KID technology combine fabrication simplicity with natural attitude to frequency-domain multiplexing, making it an ideal candidate for a large scale bolometric experiments. We will give an overview of the CALDER project and show the performances obtained with prototype detectors both in terms of energy resolution and efficiency.

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“…The AMoRE collaboration utilizes calcium molybdate (CaMoO 4 ) crystal scintillators [15,16] [23]. Moreover, Li 2 MoO 4 based detectors can be also used for neutron counting in low background conditions [22] and search for solar axions [24].…”

mentioning

confidence: 99%