Enriched TeO2 bolometers with active particle discrimination: Towards the CUPID experiment

Artusa, D. R.; Avignone, F. T.; Beeman, J. W.; Dafinei, I.; Dumoulin, L.; Ge, Z. W.; Giuliani, A.; Gotti, C.; Marcillac, P. de; Marnieros, S.; Nagorny, S.; Nisi, S.; Nones, C.; Norman, E. B.; Novati, V.; Olivieri, E.; Orlandi, D.; Pagnanini, L.; Pattavina, L.; Pessina, G.; Pirro, S.; Poda, D.V.; Rusconi, C.; Schäffner, K.; Scielzo, N. D.; Zhu, Yuqing

doi:10.1016/j.physletb.2017.02.011

Cited by 49 publications

(61 citation statements)

References 44 publications

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“…Detectors based on TeO 2 exhibit excellent energy resolution (∆ F W HM ∼ 5 keV in the ROI around the 130 Te Q-value at 2527 keV) and very high internal purity [40] (< 1 µBq/kg for 238 U and 232 Th and their daughters). Preliminary results on TeO 2 crystals grown with tellurium enriched in 130 Te at 92% level reproduce the excellent performance of the devices with natural isotopic composition [43]. As TeO 2 is a very weak scintillator [44,45], the CROSS solution is very convenient: in fact, in order to exclude the α component in a future upgrade of TeO 2 bolometers, an optical bolometer needs to detect the tiny Cherenkov radiation emitted by β particles [33], requiring an intense R&D that is far to be concluded at the moment [28].…”

Section: Isotope and Compound Choice In Crossmentioning

confidence: 56%

“…The light absorber of the optical bolometer consists of a high-purity germanium wafer ( 44×0.175 mm). The light detector is often used in the Neganov-Trofimov-Luke mode with the purpose to enhance the device sensitivity [43,45]. This is convenient considering the feeble light emitted by the TeO 2 crystal and the complicated geometry of the assembly that does not ensure optimal light collection.…”

Section: Experimental Set-up and Prototype Constructionmentioning

confidence: 99%

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The 0ν2β-decay CROSS experiment: preliminary results and prospects

Bandac¹,

Barabash²,

Bergé³

et al. 2020

J. High Energ. Phys.

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Neutrinoless double-beta decay is a key process in particle physics. Its experimental investigation is the only viable method that can establish the Majorana nature of neutrinos, providing at the same time a sensitive inclusive test of lepton number violation. CROSS (Cryogenic Rare-event Observatory with Surface Sensitivity) aims at developing and testing a new bolometric technology to be applied to future large-scale experiments searching for neutrinoless double-beta decay of the promising nuclei 100 Mo and 130 Te. The limiting factor in large-scale bolometric searches for this rare process is the background induced by surface radioactive contamination, as shown by the results of the CUORE experiment. The basic concept of CROSS consists of rejecting this challenging background component by pulse-shape discrimination, assisted by a proper coating of the faces of the crystal containing the isotope of interest and serving as energy absorber of the bolometric detector. In this paper, we demonstrate that ultra-pure superconductive Al films deposited on the crystal surfaces act successfully as pulse-shape modifiers, both with fast and slow phonon sensors. Rejection factors higher than 99.9% of α surface radioactivity have been demonstrated in a series of prototypes based on crystals of Li 2 MoO 4 and TeO 2 . We have also shown that point-like energy depositions can be identified up to a distance of ∼ 1 mm from the coated surface. The present program envisions an intermediate experiment to be installed underground in the Canfranc laboratory (Spain) in a CROSS-dedicated facility. This experiment, comprising ∼ 3×10 25 nuclei of 100 Mo, will be a general test of the CROSS technology as well as a worldwide competitive search for neutrinoless double-beta decay, with sensitivity to the effective Majorana mass down to 70 meV in the most favorable conditions.

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Section: Isotope and Compound Choice In Crossmentioning

confidence: 56%

Section: Experimental Set-up and Prototype Constructionmentioning

confidence: 99%

The 0ν2β-decay CROSS experiment: preliminary results and prospects

Bandac¹,

Barabash²,

Bergé³

et al. 2020

J. High Energ. Phys.

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“…When a light detector is coupled to a source of scintillation and/or Cherenkov radiation, the registered light (initially calibrated e.g. by X-rays at 0 V electrode bias) can also be exploited [39]. It is worth noting that the calibration of a detector operated in the NTL mode strongly depends on the source used, since the quantum efficiency depends on the particle and wavelength (we will see later in the text).…”

Section: Calibrationmentioning

confidence: 99%

“…To-date, several technologies of NTL bolometers for the detection of photons have been developed and used for the aforementioned applications. They can be grouped according to the absorber material and the temperature sensor as follows: silicon absorbers equipped with TES (Transition-Edge Sensor) thermometers [14,32,33,34,35]; silicon absorber with NTD (Neutron-Transmutation-Doped) germanium thermistors [36,37]; and germanium absorbers read-out by NTD-Ge thermistors [38,39,40].…”

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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“…At the same time the lower limits for the half-lives of the 0νββ decay mode keep steadily increasing [3]. Important nuclei for the present and future 0νββ experiments are 76 Ge (the GERDA experiment [6], and in the future GERDA and Majorana [7]), 82 Se (the NEMO-3 experiment [8], and in the future SuperNEMO [9] and MOON [10]), 96 Zr (the NEMO-3 experiment [11]), 100 Mo (the NEMO-3 experiment [12], and in the future AMoRE [13], LUMINEU [14], CUPID [15], MOON [10]), 116 Cd (the NEMO-3 experiment [16], and in the future AURORA [17], COBRA [18]), 130 Te (the CUORE experiment [19], and in the future CUORE and SNO+ [20]), and 136 Xe (the EXO [21] and KamLAND-Zen [22] experiments, and in the future NEXT [23] and PandaX-III [24]). …”

Section: Introductionmentioning

confidence: 99%

Impact of the quenching of gA on the sensitivity of 0νββ experiments

Suhonen

2017

Phys. Rev. C

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Detection of the neutrinoless ββ (0νββ) decay is of high priority in the particle-and neutrinophysics communities. The detectability of this decay mode is strongly influenced by the value of the weak axial-vector coupling constant gA. The recent nuclear-model analyses of β and ββ decays suggest that the value of gA could be dramatically quenched, reaching ratios of g free A /gA ≈ 4, where g free A = 1.27 is the free, neutron-decay, value of gA. The effects of this quenching appear devastating for the sensitivity of the present and future 0νββ experiments since the 4th power of this ratio scales the 0νββ half-lives. This, in turn, could lead to some two orders of magnitude less sensitivity for the 0νββ experiments. In the present article it is shown that by using a consistent approach to both the two-neutrino ββ and 0νββ decays by the proton-neutron quasiparticle random-phase approximation (pnQRPA), the feared two-orders-of-magnitude reduction in the sensitivity of the 0νββ experiments actually shrinks to a reduction by factors in the range 2 − 6. This certainly has dramatic consequences for the potential to detect the 0νββ decay.PACS numbers: 21.60.Jz, 23.40.Hc, 27.50.+e, 27.60.+j Keywords: Detectability of the neutrinoless double beta decay, nuclear matrix elements, quenching of the axial-vector coupling strength, sensitivity of the double-beta experiments

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Enriched TeO2 bolometers with active particle discrimination: Towards the CUPID experiment

Cited by 49 publications

References 44 publications

The 0ν2β-decay CROSS experiment: preliminary results and prospects

The 0ν2β-decay CROSS experiment: preliminary results and prospects

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

Impact of the quenching of gA on the sensitivity of 0νββ experiments

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