CLOUD: Resolving the Reactor Staging Puzzles at Chooz?

by Prof. Anatael Cabrera (CNRS / Université Paris-Saclay)

Tuesday 25 Nov 2025, 13:30 → 15:00 Asia/Shanghai

Tsung-Dao Lee Institute/N6F-N600 - Lecture Room (Tsung-Dao Lee Institute)

ABSTRACT：

The CLOUD experiment is pioneering the first fundamental research reactor antineutrino experiment using the novel LiquidO technology for event-wise e+ (antimatter) tagging upon the interaction of reactor antineutrinos. The project’s programme is twofold. First, the demonstration of antineutrino detection for reactor monitoring on industrial reactor innovation in partnership with EDF, which is the primary goal of the “AntiMatterOTech”, funded by the EU-EIC and UKRI. And second, a complementary programme of fundamental neutrino science, which is referred to as the CLOUD experiment. The experimental setup envisioned is the first 10-tonne LiquidO detector, filled with a novel generation of opaque scintillators. The detector will be located at the renowned Chooz reactor at around 35 m from the core of one of the most powerful European nuclear plants, with minimal overburden. Detecting order 10,000 antineutrinos daily (reactor-ON) with a high (≥100) signal-to-background discrimination also enables a new level of accurate exploration of reactor-OFF data. CLOUD-I targets the absolute flux antineutrino exploration with a permille precision to address today’s still open issues, namely, the existing spectral distortion and deficit. The goal is to use both CC and NC interactions to conclude whether there is any evidence of new physics or merely some reactor-related nuclear physics. The subsequent phase, CLOUD-II, aims to explore the CC neutrino component of the reactor flux, thereby completing the reactor-wise exploration using an indium-doped opaque scintillator. The primary background in this phase is solar pp-neutrinos, thus opening the opportunity for their first detection by a small detector deployed almost on the surface.

BIOGRAPHY：

POSITIONS
•Particle Physicist — specialised in neutrino science since 2001
•DPhil at University of Oxford (2001-2005) — MINOS experiment
•PostDoc at College de France (2005-2006) — Double Chooz experiment
•Marie Curie Fellow at APC Laboratory (2006-2007) — Double Chooz experiment
•CNRS scientist (staff) since 2007
-APC Laboratory (Paris): 2007-2018
-LAL Laboratory (Orsay): 2018-2020
-IJCLab Laboratory (Orsay): since 2020 (fusion from LAL)

PROJECTS
•SuperChooz (exploration) 2018 — collaboration CNRS⊕EDF
-responsible scientific (since 2022)

•CLOUD / AntiMatter OTech 2020 [EU-EIC / UKRI]  — collaboration international
-co-spokesperson / scientific responsible (since 2020)

•LPET OTech 2021 [funded ANR] — national consortium (France)
-spokesperson (since 2021)

•LiquidO technology (since 2012) — international collaboration
-co-spokesperson (since 2016)

•Double Chooz experiment (2005-2023) — international collaboration
-spokesperson (since 2017)
-physics coordinator (2014-2018)
-detector(s) coordinator (2008-2018)

•JUNO experiment (since 2014) — reactor neutrino mainly
-dual-calorimetry design (2015)
-small-PMT system coordinator (2015-2020)

ONLINE  LINK

Tencent ID：572 174 141 
PW：123456
https://meeting.tencent.com/dm/dG4vGBI5KGiF