MELODIC · Molecule for low diffusion TPCs for rare event searches
„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“
- Период
- 2017-09-18 → 2019-10-30
- Финансиране от ЕС
- 159 126 €
- Участници
- 2
- Схема
- MSCA-IF-GF
Линиите свързват координатора с партньорите.
Накратко на български
Добавянето на хелий или метан към ксенонов газ помага за намаляване на разсейването на електроните при търсене на бета разпад без неутрино. Това подобрява точността на измерванията, за да се разбере защо във Вселената има повече материя, отколкото антиматерия.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Molecule for low diffusion TPCs for rare event searches
All the structures that we see in the Universe like stars, galaxies, clusters, consist of matter. There is no antimatter in appreciable quantities and the Standard Model (SM) of particle physics alone cannot account for it. Why there is such more matter than antimatter in the Universe is one of the most important open questions in particle physics nowadays. The discovery of the neutrino as Majorana particle means that it is indistinguishable from its antiparticle. This will have profound implications for cosmology, as Majorana neutrinos violate lepton number and could explain matter-antimatter difference in the Universe. Currently, the most sensitive experimental method to establish that neutrinos are Majorana particles is the search for neutrinoless double beta decay (0nubb). The NEXT experiment is seeking for this decay in a high pressure xenon gas (HPGXe) time projection chamber (TPC) with electroluminescent (EL) amplification. This technology is one of the most promising as it can uniquely image the track of the two electrons emitted in a bb0nu event, together with high energy resolution. However, the current imaging performance is limited by the diffusion of the ionization electrons during drift. The goal of the Marie Sklodowska Curie project MELODIC is to reduce this diffusion by a factor 3 at 10 bar pressure by adding additives like He or CH4 to the pure xenon gas. This could enhance the sensitivity of the HPGXe-EL technology to the bb0nu decay by a factor 2 at 15 bar pressure. The main goal of the project has been achieved. We have demonstrated experimentally that adding 15% of Helium to the pure xenon can reduce the transverse diffusion of the pure xenon configuration a factor of 3 at a total pressure of 10 bar.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
One of the most promising technologies to search for neutrinoless double beta decay (0nubb) is a high pressure xenon gas (HPGXe) time projection chamber (TPC) with electroluminescent (EL) amplification. The key advantage of an EL HPGXe TPC is the capability to uniquely image the track of the two emitted electrons in a 0nubb event, together with high energy resolution. The current imaging performance is limited by the diffusion of the ionization electrons during drift. This proposaldescribes a research program to reduce diffusion by adding CH4 molecular additives to the xenon gas toimprove the imaging capability in an EL HPGXe TPC enhancing the sensitivity to the 0nubb decay, within the context of the NEXT collaboration. Dr. Lopez March and the two supervisors Prof. Gomez Cadenas and Prof. Nygren propose to develop the project in two stages: 1) characterization of the CH4 molecular additive in a small detector at the University of Texas at Arlington (UTA), Outgoing Phase); 2) exploit the new gas mixture to perform the measurement of the topological signature with the NEXT-DEMO TPC at the Instituto de Fisica Corpuscular (SPAIN) and with the NEW TPC at the underground Laboratorio Subterr\'aneo de Canfranc (LSC) (Return Phase). The objectives of the MELODIC project have been planned to boost the career development of the fellow. The overall training received by Dr. Lopez March in the proposed research project will give her independence and professional maturity. She will become a truly, multidisciplinary researcher capable of integrating different areas of research (operation of detectors and physics data analysis) making her uniquely trained for leading her own line of research.
Оригинален текст от CORDIS (на английски).
Участници
- UNIVERSITAT DE VALENCIA · ValenciaКоординаторИспания
- THE UNIVERSITY OF TEXAS SYSTEM · AustinСъединени щати
Връзки
Данни: CORDIS, © Европейски съюз