An homeopathic cure to pure Xenon large diffusion

Abstract

The NEXT neutrinoless double beta decay experiment will use a high- pressure gas electroluminescence-based TPC to search for the decay of Xe-136. One of the main advantages of this technology is the possibility to reconstruct the topology of events with energies close to Qbb. The rejection potential associated to the topology reconstruction is limited by our capacity to prop- erly reconstruct the original path of the electrons in the gas. This reconstruction is limited by different factors that include the geometry of the detector, the density of the sensors in the tracking plane and the separation among them, etc. Ultimately, the resolution is limited by the physics of electron diffusion in the gas. In this paper we present a series of molecular additives that can be used in Xenon gas at very low partial pressure to reduce both longitudinal and transverse diffusion. We will show the results of different Monte-Carlo simulations of electron transport in the gas mixtures from wich we have extracted the value of some important parameters like diffusion, drift velocity and light yields. These results show that there is a series of candidates that can reduce diffusion without affecting the energy resolution of the detector and they should be studied experimentally. A comparison with preliminary results from such an ongoing experimental effort is given.

Proceedings of LIDINE 2015 conference

References in corpus (2)

• Angular analysis of the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay using $3\,\mbox{fb}^{-1}$ of integrated luminosity
• Energy Resolution studies for NEXT

Cited by in corpus (10)

• Background rejection in NEXT using deep neural networks
• Gaseous and dual-phase time projection chambers for imaging rare processes
• Electron Transport in Gaseous Detectors with a Python-based Monte Carlo Simulation Code
• Helium-Xenon mixtures to improve topological signature in high pressure gas Xenon TPCs
• Microscopic simulation of xenon-based optical TPCs in the presence of molecular additives
• Electroluminescence TPCs at the thermal diffusion limit
• Boosting background suppression in the NEXT experiment through Richardson-Lucy deconvolution
• Dielectric Strength of Noble and Quenched Gases for High Pressure Time Projection Chambers
• New Technologies for Discovery
• On the possibility of positive-ion detection in gaseous TPCs and its potential use for neutrinoless double beta decay searches in Xe-136