CYGNO Collaboration Meeting 2021

20 Dec 2021, 09:00 → 21 Dec 2021, 18:20 Europe/Rome

Rectorate/Building-Auditorium (GSSI)

Elisabetta Baracchini (Gran Sasso Science Institute)

NEW!

Remote connection details

https://us02web.zoom.us/j/82660359480?pwd=TlhPRDUzTFN4RUhiMmNRVFA3aXdjQT09

Meeting ID: 826 6035 9480
Passcode: 674181

 

CYGNO COLLABORATION MEETING 2021

The CYGNO experiment (a CYGNus module with Optical readout) aims at exploiting the optical readout approach of multiple-GEM structures in large volume TPC for the study of rare events as interactions of low mass Dark Matter or Solar Neutrinos. The combined use of high-granularity sCMOS camera and fast light sensors allows the reconstruction of the 3D direction of the tracks, offering good energy resolution and very high sensitivity in the few keV energy range, together with a very good particle identification useful to distinguish nuclear recoils from electronic recoils. This experiment is part of the CYGNUS proto-collaboration which aims at establishing a multi-site multi-target Galactic Directional Recoil Observatory to probe the Dark Matter hypothesis below the Neutrino Floor and measure Solar Neutrinos with directionality.

The first CYGNO international collaboration meeting will be held at the Gran Sasso Science Institute in L'Aquila the 20th and 21st December 2021 to discuss the latest developments and updates.

IMPORTANT INFORMATION:

• Please, register as soon as possible through the registration form. The CYGNO Collaboration Meeting 2021 participation is completely free of charge, but we need to know how many people will come in person and visit Laboratori Nazionali del Gran Sasso as soon as possible for organisational reasons. 

• Please book the hotel room as soon as possible to ensure availability, given the high room requests for the meeting period. See Accommodation for details.

• Gran Sasso Science Institute is located about 120 km from Rome, easily reachable by bus. See How to reach GSSI for details.

• We are going to visit Laboratori Nazionali del Gran Sasso and the underground LIME setup on the 21st December morning. Please, confirm in the registration form your attendance if you wish to participate. See LNGS visits for details.

 

 

Local Organising Committee

Elisabetta Baracchini

Eliana Di Giovanni

Giovanni Mazzitelli

Davide Pinci

 

International Advisory Committee

Rafael Antunes Nóbrega

Joaquim Marques Ferreira dos Santos

Neil Spooner

 

 

 

 

Monday, 20 December

1 Welcome & Introduction

Speaker: Prof. Elisabetta Baracchini

welcome_coll_meet_2021.pdf

2 Status and Plans of the CYGNO

The status and plans of the CYGNO project will be presented

CYGNO_summary.pdf

3 it could work! (cit.)

Status of LIME installation at LNGS, present and future plans for LIME and CYGNO setup.

It could work!.pdf

4 Discussion

5 LIME: calibration with 55Fe source

The study of the response of LIME prototype to 5.9 keV photons produced by a ⁵⁵Fe source as a function of the interaction position and the operating condition of the detector will be presented and discussed.

Speaker: Davide Pinci (INFN - Sezione di Roma)

LIME_performance.pdf

6 Studies on LIME performance stabilities

In this talk I'll present the studies on LIME performance stability

Stability_test.pdf

7 LIME clustering and energy response

The current cluster reconstruction algorithm, event selection, energy reconstruction and corrections, together with results on data with X-rays calibration sources at different energies will be presented and discussed.

2021-12-20-clustering-linearity-collmeeting.pdf

8 Electroluminescence and gas studies with MANGO

I will talk about general status of electroluminescence and gas studies focusing on MANGO

General_Meeting_20_12_21.pdf

9 Further studies on He-CF4-isobutane mixtures for the CYGNO TPC and studies of the P/T detector response

Following the former studies on He-CF4 (60/40) mixtures with the addition of isobutane percentages from 1- 5%, on the search for the gas mixture that at best enhances the electroluminescence (EL) gain while minimizing the detector operation instabilities owing to the addition of isobutane, we varied the ratio of CF4-to-He for two different isobutane contents, namely 2% and 5% and studied the EL yield, charge gain and energy resolution while monitoring the detector instabilities as we were increasing the electric field.
These studies were motivated by the knowledge that CF4 favors scintillation production while isobutane increases detector operation instability, limiting this way the ultimate voltage applied and, thus, limiting the maximum achievable EL gain. Our goal is to compensate for this EL limitation due to isobutane with the increase of the added amount of CF4.
For this part of the work we have placed a borosilicate filter upon the photosensor window to cut off the VUV and UV part of the scintillation emission, to match closely the response of the ORCA camera used in CYGNO; this procedure enables a closer comparison of our results and the results obtained with LEMON and LIME.
Furthermore, we report on PTN studies that we had done to study the detector stability as a response to P and T variations in the environment and if those variations influence the detector response and how.

Speakers: Mrs Rita J C Roque (LIBPhys, Deparment of Physics, University of Coimbra, 3004-516 Coimbra, Portugal), Mr R Daniel P Mano (LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal)

CYGNO Meeting - 20-12-2021_211220_081505.pdf

10 INITIUM: an Innovative Negative Ion Time projection chamber for Underground Dark Matter searches.....it could really work?????

Speaker: Prof. Elisabetta Baracchini

Baracchini_CYGNO_collaboration_meeting_GSSI_20_12_21.pdf

11 Sensor Dark Noise Studies

A summary of the activities carried out by the UFJF (Universidade Federal de Juiz de Fora) and CBPF (Centro Brasileiro de Pesquisas Físicas) institutions within the CYGNO Collaboration will be presented and future plans will be discussed.

CygnoMeet2021_SensorsStudy(1).pdf

17:20 Coffe break

12 Status of the data acquisition and trigger system

We report on the current status and future upgrades of the data acquisition and trigger system.

CygnoDAQ-CM-2021.12.21.pdf

13 Discussion

20:00 Social Dinner

https://indico.gssi.it/event/334/page/95-social-dinner

Tuesday, 21 December

14 Gas system status

I will review the status of the gas system for the underground operations

renga_cygno_dec21.pdf

15 Molecular sieve-based gas recycling system with radon reduction for rare-event gaseous detectors

A new molecular sieve-based gas recycling system is presented that provides for simultaneous removal of both radon and common impurities from SF$_6$:CF$_4$:He gases in TPCs, hence minimising the total amount of gas required. Removal of internally-produced radon and associated progeny is important for background suppression whilst removal of outgassing and leaked-in contaminants such as water, oxygen and nitrogen is required to suppress capture of interaction-produced electrons which causes gain suppression. The system utilises a Vacuum Swing Adsorption (VSA) technique, allowing continuous long-term operation. Studies are presented of a new low radioactive molecular sieve, developed for this work and found to emanate radon up to 98% less per radon captured than commercial material.

GREGORIO2021_CYGNOMEETING.pdf

16 Direct detection for CYGNO

I will review the concepts of direct detection of dark matter, for both spin independent and spin dependent interactions, relevant for the CYGNO experiment. In particular, I will discuss the possibility to improve the sensitivity exploiting the Migdal effect.

Speaker: Giovanni Grilli di Cortona (INFN - LNF)

Grilli_DD4Cygno.pdf

17 Detector simulation and saturation

The status of the simulation of the detector response (digitisation), including the saturation effect, will be presented together with preliminary comparisons between simulation and real data.

Digitization_201221_v3.pdf

18 Directionality of low energy electron recoil

In this talk, I will expose the latest results in directionality reconstruction of low energy electron recoil with LIME detector

Pres_CYGNOMeeting_V0.pdf

19 Electron and Nuclear Recoil Discrimination Studies

I'll talk about track reconstruction and particle identification studies using multivariate analysis in the CYGNO experiment.

Electron and Nuclear Recoil Discrimination Studies_collaboration meeing_atul.pdf

20 Background simulation in LIME

I will present a summary of the results of the Monte Carlo simulation of the expected background in LIME for underground operation.

LIME_bkg_collab_meeting_20-12-21.pdf

21 Background simulations for CYGNO detector

A review of the simulations for the background estimation of CYGNO experiment is presented. External background from environmental gamma and neutrons at LNGS is simulated for different shielding options. Internal background from the various parts of the setup is calculated assuming the radioactivity measurements made by the collaboration (if available), or from literature and public databases.

CYGNO_collaboration_meeting_20-21_12_21.pdf

22 Cygno PubComm Activity

The PubComm take care of the Paper writing/review and the Conference participation.
A summary of the 2021 activity is presented; a remind of the general guidelines; the wiki repository and the paper Author list.

Speaker: Dr Giovanni Maccarrone (INFN - LNF)

JMac GSSI 21-12-21.pdf

23 Discussion and Goodbyes

17:15 Coffee break