The NEXT experiment to search for the neutrinoless double beta decay of Xe-136

Monrabal, F.

doi:10.22323/1.282.0497

Cited by 2 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Collaboration is now starting the data taking of the NEXT-White (NEW) detector [8]. NEW is located underground at Laboratorio Subterráneo de Canfranc (LSC) and its main objective is to corroborate the NEXT background model as well as to demonstrate the energy resolution for high energy events and evaluate the topological discrimination applicable due to track reconstruction.…”

Section: Energy Plane (Pmts)mentioning

confidence: 99%

Application and performance of an ML-EM algorithm in NEXT

Simón

Lerche²,

Monrabal

et al. 2017

J. Inst.

View full text Add to dashboard Cite

A: The goal of the NEXT experiment is the observation of neutrinoless double beta decay in 136 Xe using a gaseous xenon TPC with electroluminescent amplification and specialized photodetector arrays for calorimetry and tracking. The NEXT Collaboration is exploring a number of reconstruction algorithms to exploit the full potential of the detector. This paper describes one of them: the Maximum Likelihood Expectation Maximization (ML-EM) method, a generic iterative algorithm to find maximum-likelihood estimates of parameters that has been applied to solve many different types of complex inverse problems. In particular, we discuss a bi-dimensional version of the method in which the photosensor signals integrated over time are used to reconstruct a transverse projection of the event. First results show that, when applied to detector simulation data, the algorithm achieves nearly optimal energy resolution (better than 0.5% FWHM at the Q value of 136 Xe) for events distributed over the full active volume of the TPC.

show abstract

Section: Energy Plane (Pmts)mentioning

confidence: 99%

Application and performance of an ML-EM algorithm in NEXT

Simón

Lerche²,

Monrabal

et al. 2017

J. Inst.

View full text Add to dashboard Cite

show abstract

Helium–Xenon mixtures to improve the topological signature in high pressure gas xenon TPCs

Felkai

Monrabal

González-Díaz³

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

Within the framework of xenon-based double beta decay experiments, we propose the possibility to improve the background rejection of an electroluminescent Time Projection Chamber (EL TPC) by reducing the diffusion of the drifting electrons while keeping nearly intact the energy resolution of a pure xenon EL TPC. Based on state-of-the-art microscopic simulations, a substantial addition of helium, around 10 or 15 %, may reduce drastically the transverse diffusion down to 2.5 mm/ √ m from the 10.5 mm/ √ m of pure xenon. The longitudinal diffusion remains around 4 mm/ √ m. Light production studies have been performed as well. They show that the relative variation in energy resolution introduced by such a change does not exceed a few percent, which leaves the energy resolution practically unchanged. The technical caveats of using photomultipliers close to an helium atmosphere are also discussed in detail.

show abstract

The NEXT experiment to search for the neutrinoless double beta decay of Xe-136

Cited by 2 publications

References 8 publications

Application and performance of an ML-EM algorithm in NEXT

Application and performance of an ML-EM algorithm in NEXT

Helium–Xenon mixtures to improve the topological signature in high pressure gas xenon TPCs

Contact Info

Product

Resources

About