Alpha/gamma discrimination with a CaF2(Eu) target bolometer optically coupled to a composite infrared bolometer

Bobin, Christophe; Berkes, István; Hadjout, J. P.; Coron, N.; Leblanc, J.; Marcillac, P. de

doi:10.1016/s0168-9002(96)01185-0

Cited by 50 publications

(27 citation statements)

References 8 publications

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“…Alternatively, a dual readout approach based on the simultaneous measurement of the bolometric signals and of the scintillation light has been advocated, with applications both in double beta decay and in Dark Matter searches [6][7][8][9][10]. The rationale of this technique is that the scintillation light due to heavy particles is strongly quenched and the measurement of the ratio of the emitted light over the energy dissipated in heat allows one for signal-background discrimination.…”

Section: Dual Readout Approaches In Bolometric Experimentsmentioning

confidence: 99%

“…Light collection and quantum efficiencies may constitute a serious experimental challenge at cryogenic temperatures [6][7][8][9][10][11][12]. Yet, as discussed above, Cerenkov light offer the unique opportunity of full alpha background rejection even in the limit of very low detection efficiency.…”

Section: The Cerenkov Yield From Neutrinoless Double Beta Decay Of 13mentioning

confidence: 99%

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Cerenkov emission as a positive tag of double beta decays in bolometric experiments

Fatis

2009

Eur. Phys. J. C

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Active background reduction in high resolution calorimeters is a promising approach to achieve ultimate sensitivity in neutrinoless double beta decay experiments. We propose Cerenkov emission from beta rays in bolometric crystals as a viable alternative to scintillation. This novel approach could broaden the range of materials of interest for calorimetric searches of the double beta decay. We discuss the optical properties of TeO 2 crystals, as a show case.

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Section: Dual Readout Approaches In Bolometric Experimentsmentioning

confidence: 99%

Section: The Cerenkov Yield From Neutrinoless Double Beta Decay Of 13mentioning

confidence: 99%

Cerenkov emission as a positive tag of double beta decays in bolometric experiments

Fatis

2009

Eur. Phys. J. C

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“…Until now this has been achieved mainly through a simultaneous measurement of charge in semiconducting calorimeters [1,2,3]. Another technique is a simultaneous measurement of scintillation, with a principal calorimeter made out of a scintillating material which emits photons read in a secondary calorimeter [4,5] (or some other light sensitive device [6]). For instance, the next phase of the CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) dark-matter search will deploy up to 33 such modules with CaWO 4 as the main calorimeter [7].…”

Section: Introductionmentioning

confidence: 99%

Textured silicon calorimetric light detector

Stefano

Frank

Angloher

et al. 2003

Journal of Applied Physics

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We apply the standard photovoltaic technique of texturing to reduce the reflectivity of silicon cryogenic calorimetric light detectors. In the case of photons with random incidence angles, absorption is compatible with the increase in surface area. For the geometrically thin detectors studied, energy resolution from athermal phonons, dominated by position dependence, is proportional to the surface-to-volume ratio. With the CaWO 4 scintillating crystal used as light source, the time constants of the calorimeter should be adapted to the relatively slow light-emission times. PACS numbers: 29.40, 84.60.Jt, 85.25.Oj, 95.55.Vj, 95.35.+d *

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“…[62][63][64] It was the target material of the first scintillating bolometer ever constructed, 31 although in that experiment the light measurement was performed with a silicon photodiode, less sensitive than the semiconductor bolometers usually used in recent setups. 32 Scintillation at low temperature has been studied for pure and europium-activated targets, resulting in good scintillation at 1 K specially for doped samples, 65,66 although the radiopurity levels achieved in this case are usually worse. NaI, on the other hand, is one of the most widely used scintillators for γ spectroscopy due to its very high light yield.…”

Section: Scintillating Bolometers For Dark Matter Searchesmentioning

confidence: 99%

“…We also study the complementarity with two additional targets: CaF 2 and NaI. The first one has already been used as scintillating bolometer, 31,32 whereas the construction of a bolometer based on NaI (which is a hygroscopic and fragile material) is an ongoing R&D project of the Zaragoza group. 33 We include in our analysis not only the effect of the previously considered uncertainties in the halo parameters and SD structure functions, but also the possible influence of the thermal quenching between nuclear and electron recoils in the complementarity of these targets.…”

Section: Introductionmentioning

confidence: 99%

Scintillating bolometers: A key for determining WIMP parameters

Cerdeño

Marcos

Peiró

et al. 2014

Int. J. Mod. Phys. A

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In the last decade direct detection Dark Matter (DM) experiments have increased enormously their sensitivity and ton-scale setups have been proposed, especially using germanium and xenon targets with double readout and background discrimination capabilities. In light of this situation, we study the prospects for determining the parameters of Weakly Interacting Massive Particle (WIMP) DM (mass, spin-dependent (SD) and spin-independent (SI) cross section off nucleons) by combining the results of such experiments in the case of a hypothetical detection. In general, the degeneracy between the SD and SI components of the scattering cross section can only be removed using targets with different sensitivities to these components. Scintillating bolometers, with particle discrimination capability, very good energy resolution and threshold and a wide choice of target materials, are an excellent tool for a multitarget complementary DM search. We investigate how the simultaneous use of scintillating targets with different SD-SI sensitivities and/or light isotopes (as the case of CaF 2 and NaI) significantly improves the determination of the WIMP parameters. In order to make the analysis more realistic we include the effect of uncertainties in the halo model and in the spin-dependent nuclear structure functions, as well as the effect of a thermal quenching different from 1.

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Alpha/gamma discrimination with a CaF2(Eu) target bolometer optically coupled to a composite infrared bolometer

Cited by 50 publications

References 8 publications

Cerenkov emission as a positive tag of double beta decays in bolometric experiments

Cerenkov emission as a positive tag of double beta decays in bolometric experiments

Textured silicon calorimetric light detector

Scintillating bolometers: A key for determining WIMP parameters

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