Potentialities of the future technical improvements in the search of rare nuclear decays by bolometers

Bellini, F.

doi:10.1142/s0217751x18430030

Cited by 14 publications

(14 citation statements)

References 139 publications

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“…see [4][5][6]). Additionally, recent technological advances have demonstrated the ability to do particle identification [4][5][6], allowing for a reduction of backgrounds in the signal region of interest by multiple orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

A CUPID Li₂¹⁰⁰MoO₄ scintillating bolometer tested in the CROSS underground facility

Armatol¹,

Armengaud²,

Armstrong³

et al. 2021

J. Inst.

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A scintillating bolometer based on a large cubic Li 2 100 MoO 4 crystal (45 mm side) and a Ge wafer (scintillation detector) has been operated in the CROSS cryogenic facility at the Canfranc underground laboratory in Spain. The dual-readout detector is a prototype of the technology that will be used in the next-generation 0 2 experiment CUPID. The measurements were performed at 18 and 12 mK temperature in a pulse tube dilution refrigerator. This setup utilizes the same technology as the CUORE cryostat that will host CUPID and so represents an accurate estimation of the expected performance. The Li 2 100 MoO 4 bolometer shows a high energy resolution of 6 keV FWHM at the 2615 keV line. The detection of scintillation light for each event triggered by the Li 2 100 MoO 4 bolometer allowed for a full separation (∼8) between () and events above 2 MeV. The Li 2 100 MoO 4 crystal also shows a high internal radiopurity with 228 Th and 226 Ra activities of less than 3 and 8 Bq/kg, respectively. Taking also into account the advantage of a more compact and massive detector array, which can be made of cubic-shaped crystals (compared to the cylindrical ones), this test demonstrates the great potential of cubic Li 2 100 MoO 4 scintillating bolometers for high-sensitivity searches for the 100 Mo 0 2 decay in CROSS and CUPID projects.

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Section: Introductionmentioning

confidence: 99%

A CUPID Li₂¹⁰⁰MoO₄ scintillating bolometer tested in the CROSS underground facility

Armatol¹,

Armengaud²,

Armstrong³

et al. 2021

J. Inst.

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“…The main crystal is operated as a bolometer and the simultaneous detection of heat and light signals associated to the same event can provide particle identification and consequently an active background rejection, as proposed in [7,8,9,10] and successfully performed (see e.g. in [11,12,13]). In particular, composite heat-and-light detectors allow to control dominant background events such as nuclear recoils in dark-matter searches and alpha particles in double-beta-decay experiments.…”

Section: Introductionmentioning

confidence: 99%

Charge-to-heat transducers exploiting the Neganov-Trofimov-Luke effect for light detection in rare-event searches

Novati

Bergé

Dumoulin

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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In this work we present how to fabricate large-area (15 cm 2 ), ultra-low threshold germanium bolometric photo-detectors and how to operate them to detect few (optical) photons. These detectors work at temperatures as low as few tens of mK and exploit the Neganov-Trofimov-Luke (NTL) effect. They are operated as charge-to-heat transducers: the heat signal is linearly increased by simply changing a voltage bias applied to special metal electrodes, fabricated onto the germanium absorber, and read by a (NTD-Ge) thermal sensor. We fabricated a batch of five prototypes and ran them in different facilities with dilution refrigerators. We carefully studied how impinging spurious infrared radiation impacts the detector performances, by shining infrared photons via optical-fiber-guided LED signals, in a controlled manner, into the bolometers. We hence demonstrated how the radiation-tightness of the test environment tremendously enhances the detector performances, allowing to set electrode voltage bias up to 90 volts without any leakage current and signal-to-noise gain as large as a factor 12 (for visible photons). As consequence, for the first time we could operate large-area NTD-Ge-sensorequipped NTL bolometric photo-detectors capable to reach sub 10-eV baseline noise (RMS). Such detectors open new frontiers for rare-event search experiments based on low light yield Ge-NTD equipped scintillating bolometers, such the CUPID neutrinoless double-beta decay experiment.1 The enhancement of visible-wavelength photons absorption was initially found to be 35% [45].

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“…Among the technologies proposed for double beta decay searches, cryogenic calorimeters stand out for their energy resolution and efficiency [14][15][16]. These devices can be sketched as crystals of hundreds of grams cooled at 10 mK and coupled to temperature sensors.…”

Section: Introductionmentioning

confidence: 99%

Search for neutrinoless double beta decay of $$^{64}$$Zn and $$^{70}$$Zn with CUPID-0

et al. 2020

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CUPID-0 is the first pilot experiment of CUPID, a next-generation project searching for neutrinoless double beta decay. In its first scientific run, CUPID-0 operated 26 ZnSe cryogenic calorimeters coupled to light detectors in the underground Laboratori Nazionali del Gran Sasso. In this work, we analyzed a ZnSe exposure of 11.34 kg year to search for the neutrinoless double beta decay of $$^{70}$$70Zn and for the neutrinoless positron-emitting electron capture of $$^{64}$$64Zn. We found no evidence for these decays and set 90$$\%$$% credible interval limits of $$\hbox {T}_{1/2}^{0\nu \beta \beta }$$T1/20νββ($$^{70}$$70Zn) > 1.6 $$10^{21}$$1021 year and $$\hbox {T}_{1/2}^{0\nu EC \beta +}$$T1/20νECβ+($$^{64}$$64Zn) > 1.2$$\times 10^{22}$$×1022 year, surpassing by more than one order of magnitude the previous experimental results (Belli et al. in J Phys G 38(11):115107, https://doi.org/10.1088/0954-3899/38/11/115107, 2011).

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Potentialities of the future technical improvements in the search of rare nuclear decays by bolometers

Cited by 14 publications

References 139 publications

A CUPID Li₂¹⁰⁰MoO₄ scintillating bolometer tested in the CROSS underground facility

A CUPID Li₂¹⁰⁰MoO₄ scintillating bolometer tested in the CROSS underground facility

Charge-to-heat transducers exploiting the Neganov-Trofimov-Luke effect for light detection in rare-event searches

Search for neutrinoless double beta decay of $$^{64}$$Zn and $$^{70}$$Zn with CUPID-0

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Potentialities of the future technical improvements in the search of rare nuclear decays by bolometers

Cited by 14 publications

References 139 publications

A CUPID Li2100MoO4 scintillating bolometer tested in the CROSS underground facility

A CUPID Li2100MoO4 scintillating bolometer tested in the CROSS underground facility

Charge-to-heat transducers exploiting the Neganov-Trofimov-Luke effect for light detection in rare-event searches

Search for neutrinoless double beta decay of $$^{64}$$Zn and $$^{70}$$Zn with CUPID-0

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A CUPID Li₂¹⁰⁰MoO₄ scintillating bolometer tested in the CROSS underground facility

A CUPID Li₂¹⁰⁰MoO₄ scintillating bolometer tested in the CROSS underground facility