Scintillation light detection in the 6-m drift-length ProtoDUNE Dual Phase liquid argon TPC

DUNE is a dual-site experiment for long-baseline neutrino oscillation studies, neutrino astrophysics and nucleon decay searches. ProtoDUNE Dual Phase (DP) is a 6  ×  6  ×  6 m 3 liquid argon time-projection-chamber (LArTPC) that recorded cosmic-muon data at the CERN Neutrino Platform in 2019-2020 as a prototype of the DUNE Far Detector. Charged particles propagating through the LArTPC produce ionization and scintillation light. The scintillation light signal in these detectors can provide the trigger for non-beam events. In addition, it adds precise timing capabilities and improves the calorimetry measurements. In ProtoDUNE-DP, scintillation and electroluminescence light produced by cosmic muons in the LArTPC is collected by photomultiplier tubes placed up to 7 m away from the ionizing track. In this paper, the ProtoDUNE-DP photon detection system performance is evaluated with a particular focus on the different wavelength shifters, such as PEN and TPB, and the use of Xe-doped LAr, considering its future use in giant LArTPCs. The scintillation light production and propagation processes are analyzed and a comparison of simulation to data is performed, improving understanding of the liquid argon properties

Separation of track- and shower-like energy deposits in ProtoDUNE-SP using a convolutional neural network

Liquid argon time projection chamber detector technology provides high spatial and calorimetric resolutions on the charged particles traversing liquid argon. As a result, the technology has been used in a number of recent neutrino experiments, and is the technology of choice for the Deep Underground Neutrino Experiment (DUNE). In order to perform high precision measurements of neutrinos in the detector, final state particles need to be effectively identified, and their energy accurately reconstructed. This article proposes an algorithm based on a convolutional neural network to perform the classification of energy deposits and reconstructed particles as track-like or arising from electromagnetic cascades. Results from testing the algorithm on data from ProtoDUNE-SP, a prototype of the DUNE far detector, are presented. The network identifies track- and shower-like particles, as well as Michel electrons, with high efficiency. The performance of the algorithm is consistent between data and simulation

Separation of track- and shower-like energy deposits in ProtoDUNE-SP using a convolutional neural network

Liquid argon time projection chamber detector technology provides high spatial and calorimetric resolutions on the charged particles traversing liquid argon. As a result, the technology has been used in a number of recent neutrino experiments, and is the technology of choice for the Deep Underground Neutrino Experiment (DUNE). In order to perform high precision measurements of neutrinos in the detector, final state particles need to be effectively identified, and their energy accurately reconstructed. This article proposes an algorithm based on a convolutional neural network to perform the classification of energy deposits and reconstructed particles as track-like or arising from electromagnetic cascades. Results from testing the algorithm on experimental data from ProtoDUNE-SP, a prototype of the DUNE far detector, are presented. The network identifies track- and shower-like particles, as well as Michel electrons, with high efficiency. The performance of the algorithm is consistent between experimental data and simulation

Predictors of the use of healthcare services in children and adolescents in Spain.

OBJECTIVE: To assess medium to long term predictors of healthcare services use in a population-based sample of children/adolescents in Spain. METHODS: A sample of children and adolescents aged 8-18 and their parents were evaluated at baseline (2003) and follow-up (2006). Total use of healthcare services and visits to specialist and dentists at the follow-up were analyzed. RESULTS: Four hundred fifty-four children/adolescents completed baseline and follow-up assessments (response rate 54 %). 90 % of respondents reported at least one visit during the 12 months previous to the follow-up. Low socioeconomic status (beta coefficient = 0.30; 95 % CI = 0.02-0.57), double healthcare coverage (0.41; 0.17-0.66), parental use of services, poor mental health and activity limitation were associated to the total number of visits. Access to specialist was associated to double healthcare coverage (OR = 1.77; 1.01-3.07) and parental primary level of education (OR = 0.51; 0.32-0.81). Age and low family affluence predicted visits to dentists (OR = 0.38; 0.19-0.73). CONCLUSION: No barriers to healthcare services use were found. Family level of education, family affluence and double healthcare coverage predicted the use of specialists and dentists

Environmental risk and protective factors of adolescents' and youths' mental health: differences between parents' appraisal and self-reports.

PURPOSE: We investigated the effect of parents' mental health, life events, and home life (among other factors) on adolescents'/youths' mental health, whether such an effect varies when several variables are assessed jointly, and also whether the informant source of the mental health problem modifies the estimations. METHODS: We studied a representative sample of 454 Spanish adolescents/youths studied longitudinally (2 assessments, 3 years apart). We considered factors associated with adolescents'/youths' mental health (conduct, emotional, and hyperactivity scores [SDQ]): risk factors (parents' mental health and life events) and mediators (social and financial support). Structural equation modeling was applied. We constructed two models: (a) with parents' SDQ responses and (b) with self-reported SDQ responses (in a subsample of N = 260). RESULTS: Model fit was adequate for parents' appraisal. Parents' mental health (p < 0.05) and undesirable life events (p < 0.05) were the most important risk factors. The same model showed poorer fit when self-reported measures were used. Home life exerted a stronger protective effect on adolescents'/youths' mental health when reported by adolescents/youths. The negative effect of parents' mental health was significantly protected by home life in emotional [-0.14 (0.07)] and hyperactivity scores [-0.2 (0.08)]. CONCLUSIONS: Even in the presence of other factors, parents' mental health has an important effect on adolescents'/youths' mental health. Good levels of home life are protective, especially when adolescents'/youths' mental health is self-reported

Erratum: Environmental risk and protective factors of adolescents' and youths' mental health: Differences between parents' appraisal and self-reports (Quality of Life Research DOI: 10.1007/s11136-012-0167-x)

PURPOSE: We investigated the effect of parents' mental health, life events, and home life (among other factors) on adolescents'/youths' mental health, whether such an effect varies when several variables are assessed jointly, and also whether the informant source of the mental health problem modifies the estimations. METHODS: We studied a representative sample of 454 Spanish adolescents/youths studied longitudinally (2 assessments, 3 years apart). We considered factors associated with adolescents'/youths' mental health (conduct, emotional, and hyperactivity scores [SDQ]): risk factors (parents' mental health and life events) and mediators (social and financial support). Structural equation modeling was applied. We constructed two models: (a) with parents' SDQ responses and (b) with self-reported SDQ responses (in a subsample of N = 260). RESULTS: Model fit was adequate for parents' appraisal. Parents' mental health (p < 0.05) and undesirable life events (p < 0.05) were the most important risk factors. The same model showed poorer fit when self-reported measures were used. Home life exerted a stronger protective effect on adolescents'/youths' mental health when reported by adolescents/youths. The negative effect of parents' mental health was significantly protected by home life in emotional [-0.14 (0.07)] and hyperactivity scores [-0.2 (0.08)]. CONCLUSIONS: Even in the presence of other factors, parents' mental health has an important effect on adolescents'/youths' mental health. Good levels of home life are protective, especially when adolescents'/youths' mental health is self-reported

Relationship between life events and psychosomatic complaints during adolescence/youth: a structural equation model approach.

PURPOSE: To assess the contribution of life events (LEs) on psychosomatic complaints in adolescents/youths taking into account a set of socioeconomic variables. METHODS: We tested a conceptual model implemented with structural equation modeling on longitudinal data from a representative sample of adolescents/youths and parents. Psychosomatic complaints were measured by the Health Behaviour in School-aged Children scale and hypothesized to be affected by: (a) contextual factors at distal level: financial resources, home life and social support (KIDSCREEN), and parent baseline mental health (SF-12); (b) triggering factors: LEs (Coddington Life Events Scales, with two typologies: desirability and familiarity); (c) intermediate factors: same as distal level but measured at follow-up; (d) immediate cause: mental health at proximal level (Strengths and Difficulties Questionnaire at baseline and follow-up); and (e) gender. RESULTS: The structural model yielded a good fit (Comparative Fit Index = .95, Tucker-Lewis Index = .93, Root Mean Square Error = .04). Boys showed more psychosomatic complaints than girls (β = .40, p &lt; .05). Girls reported experiencing more LEs (p &lt; .05). Only undesirable LEs showed a significant direct negative effect on psychosomatic complaints, which became nonsignificant when mediated by home life and mental health. Undesirable LEs had a remaining indirect effects on psychosomatic complaints (βindirect = -.10, p &lt; .05) via Home Life and Mental health, which were protective factors (β = .41 and β = -.15, p &lt; .05). CONCLUSIONS: The experience of undesirable LEs increases the probability of psychosomatic complaints, but the final effect would be determined by previous levels of home life and mental health stability