Name: CYGNO Collaboration Meeting 2021
Start: 2021-12-20T09:00:00+01:00
End: 2021-12-21T18:20:00+01:00
Location: GSSI

CYGNO Collaboration Meeting 2021

from Monday, 20 December 2021 (09:00) to Tuesday, 21 December 2021 (18:20)

Monday, 20 December 2021
14:00 Welcome & Introduction - Elisabetta Baracchini
Welcome & Introduction
- Elisabetta Baracchini
14:00 - 14:10
Room: Rectorate/Building-Auditorium
14:10 Status and Plans of the CYGNO
Status and Plans of the CYGNO
14:10 - 14:30
Room: Rectorate/Building-Auditorium The status and plans of the CYGNO project will be presented

14:30 it could work! (cit.)
it could work! (cit.)
14:30 - 14:50
Room: Rectorate/Building-Auditorium Status of LIME installation at LNGS, present and future plans for LIME and CYGNO setup.

14:50 Discussion
Discussion
14:50 - 15:00
Room: Rectorate/Building-Auditorium
15:00 LIME: calibration with 55Fe source - Davide Pinci (INFN - Sezione di Roma)
LIME: calibration with 55Fe source
- Davide Pinci (INFN - Sezione di Roma)
15:00 - 15:20
Room: Rectorate/Building-Auditorium The study of the response of LIME prototype to 5.9 keV photons produced by a <sup>55</sup>Fe source as a function of the interaction position and the operating condition of the detector will be presented and discussed.
15:20 Studies on LIME performance stabilities
Studies on LIME performance stabilities
15:20 - 15:40
Room: Rectorate/Building-Auditorium In this talk I'll present the studies on LIME performance stability

15:40 LIME clustering and energy response
LIME clustering and energy response
15:40 - 16:00
Room: Rectorate/Building-Auditorium 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.

16:00 Electroluminescence and gas studies with MANGO
Electroluminescence and gas studies with MANGO
16:00 - 16:20
Room: Rectorate/Building-Auditorium I will talk about general status of electroluminescence and gas studies focusing on MANGO
16:20 Further studies on He-CF4-isobutane mixtures for the CYGNO TPC and studies of the P/T detector response - Rita J C Roque (LIBPhys, Deparment of Physics, University of Coimbra, 3004-516 Coimbra, Portugal) R Daniel P Mano (LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal)
Further studies on He-CF4-isobutane mixtures for the CYGNO TPC and studies of the P/T detector response
- Rita J C Roque (LIBPhys, Deparment of Physics, University of Coimbra, 3004-516 Coimbra, Portugal)
- R Daniel P Mano (LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal)
16:20 - 16:40
Room: Rectorate/Building-Auditorium 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.
16:40 INITIUM: an Innovative Negative Ion Time projection chamber for Underground Dark Matter searches.....it could really work????? - Elisabetta Baracchini
INITIUM: an Innovative Negative Ion Time projection chamber for Underground Dark Matter searches.....it could really work?????
- Elisabetta Baracchini
16:40 - 17:00
Room: Rectorate/Building-Auditorium
17:00 Sensor Dark Noise Studies
Sensor Dark Noise Studies
17:00 - 17:20
Room: Rectorate/Building-Auditorium 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.

17:20 Coffe break
Coffe break
17:20 - 17:40
Room: Rectorate/Building-Auditorium

17:40 Status of the data acquisition and trigger system
Status of the data acquisition and trigger system
17:40 - 18:00
Room: Rectorate/Building-Auditorium We report on the current status and future upgrades of the data acquisition and trigger system.

18:00 Discussion
Discussion
18:00 - 18:20
Room: Rectorate/Building-Auditorium

20:00 Social Dinner
Social Dinner
20:00 - 22:00
Room: Rectorate/Building-Auditorium
Tuesday, 21 December 2021

14:00 Gas system status
Gas system status
14:00 - 14:20
Room: Rectorate/Building-Auditorium I will review the status of the gas system for the underground operations

14:20 Molecular sieve-based gas recycling system with radon reduction for rare-event gaseous detectors
Molecular sieve-based gas recycling system with radon reduction for rare-event gaseous detectors
14:20 - 14:40
Room: Rectorate/Building-Auditorium 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.
14:40 Direct detection for CYGNO - Giovanni Grilli di Cortona (INFN - LNF)
Direct detection for CYGNO
- Giovanni Grilli di Cortona (INFN - LNF)
14:40 - 15:00
Room: Rectorate/Building-Auditorium 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.
15:00 Detector simulation and saturation
Detector simulation and saturation
15:00 - 15:20
Room: Rectorate/Building-Auditorium 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.

15:20 Directionality of low energy electron recoil
Directionality of low energy electron recoil
15:20 - 15:40
Room: Rectorate/Building-Auditorium In this talk, I will expose the latest results in directionality reconstruction of low energy electron recoil with LIME detector

15:40 Electron and Nuclear Recoil Discrimination Studies
Electron and Nuclear Recoil Discrimination Studies
15:40 - 16:00
Room: Rectorate/Building-Auditorium I'll talk about track reconstruction and particle identification studies using multivariate analysis in the CYGNO experiment.

16:00 Background simulation in LIME
Background simulation in LIME
16:00 - 16:20
Room: Rectorate/Building-Auditorium I will present a summary of the results of the Monte Carlo simulation of the expected background in LIME for underground operation.

16:20 Background simulations for CYGNO detector
Background simulations for CYGNO detector
16:20 - 16:40
Room: Rectorate/Building-Auditorium 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.
16:40 Cygno PubComm Activity - Giovanni Maccarrone (INFN - LNF)
Cygno PubComm Activity
- Giovanni Maccarrone (INFN - LNF)
16:40 - 17:00
Room: Rectorate/Building-Auditorium 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.
17:00 Discussion and Goodbyes
Discussion and Goodbyes
17:00 - 17:15
Room: Rectorate/Building-Auditorium

17:15 Coffee break
Coffee break
17:15 - 17:45
Room: Rectorate/Building-Auditorium