ABSTRACT
The Joint European Torus (JET) gamma-ray camera has been recently upgraded with the installation of new gamma-ray detectors, based on LaBr3(Ce) scintillation crystals, which add spectroscopic capability to the existing system allowing measurements with good energy resolution (5% at 0.622 MeV), a dynamic range from hundreds of keV up to about 30 MeV, and high counting rate capabilities of MCps. First gamma-ray measurements during the C38 campaign of the JET have been successfully carried out, in particular, in D-3He plasmas from three-ion ion cyclotron resonance heating experiments, where the detection of 16.4 MeV γ-rays from D + 3He â γ + 5Li reactions with the gamma-ray camera upgrade allowed determining the spatial profile of alpha particles born in D + 3He fusion reactions.
ABSTRACT
A new tangential gamma-ray spectrometer has been developed for fast ion measurements in deuterium and deuterium-tritium plasmas of the Joint European Torus (JET). The instrument is based on a LaBr3 crystal with a photo-multiplier tube and replaces a pre-existing bismuth germanate detector, providing enhanced energy resolution and a counting rate capability in the MHz range. The line of sight is equipped with a LiH attenuator, which reduces the background due to 14 MeV neutron interactions with the crystal by more than two orders of magnitude and enables the observation of gamma-ray emission from confined α particles in JET deuterium-tritium plasmas. Thanks to its tangential line of sight, the detector can distinguish co- and counter-passing ions. The performance of the instrument is demonstrated through the results of recent JET fast ion experiments in deuterium plasmas.
ABSTRACT
A novel compact spectrometer optimized for the measurement of hard x rays generated by runaway electrons is presented. The detector is designed to be installed in the fan-shaped collimator of the gamma-ray imager diagnostic at the DIII-D tokamak. The spectrometer is based on a 1 × 1 cm2 cerium doped yttrium aluminum perovskite scintillator crystal coupled with a silicon photomultiplier. The detector dynamic energy range is in excess of 10 MeV, with an energy resolution of â¼10% at 661.7 keV. The fast detector signal (≈70 ns full width at half maximum) allows for operation at counting rates in excess of 1 MCps. The gain stability of the system can be monitored in real time using a light-emitting diode embedded in the instrument. The detector is expected to be deployed in the forthcoming DIII-D runaway electron experimental campaign.
ABSTRACT
A new gamma-ray spectrometer with MHz capabilities has been developed to measure the bremsstrahlung emission spectrum in the gamma-ray energy band generated by MeV range runaway electrons in disruption experiments at ASDEX Upgrade. Properties of the runaway electrons are inferred from the measured bremsstrahlung spectrum by a deconvolution technique, particularly with regard to their maximum energy. Changes induced to the runaway electron velocity space are unambiguously observed both in massive gas injection and resonant magnetic perturbation experiments with the detector.
ABSTRACT
UNLABELLED: Venipuncture and intravenous cannulation are the most common painful procedures performed on children. The most widely used topical anesthetic is eutectic mixture of local anesthetics (EMLA). EMLA use is associated with a transient cutaneous vasoconstriction which can make it difficult to identify veins. We assessed with a prospective, multicenter, observational study whether EMLA interferes with venipuncture and intravenous cannulation. The primary study outcome was a success at first attempt in the course of venipuncture or venous cannulation. The study enrolled 388 children; 255 of them received EMLA and 133 did not. Eighty-six percent of procedures were successful at the first attempt in the EMLA group and 76.7 % in the no EMLA group. CONCLUSION: In this study, EMLA use did not interfere with the success of venipuncture or venous cannulation in children.
Subject(s)
Anesthetics, Local/pharmacology , Catheterization, Peripheral , Lidocaine/pharmacology , Prilocaine/pharmacology , Vasoconstriction/drug effects , Child , Child, Preschool , Female , Humans , Lidocaine, Prilocaine Drug Combination , Logistic Models , Male , Ointments/pharmacology , Phlebotomy , Prospective StudiesSubject(s)
Asthma/etiology , Respiratory Sounds/physiopathology , Child , Chronic Disease , Humans , Phenotype , Time FactorsABSTRACT
OBJECTIVE: To evaluate the impact of the communication of an HPV diagnosis on the cognitive-behavioural aspect, emotional experiences, psychic-physical well-being, and psychosexual sphere in young women between the ages of 20 and 45. METHOD: During the period between February 2006 and March 2007, at the U.O. Department of Obstetrics and Gynecology of the ULSS 13 of Mirano (VE), we distributed three self-evaluating questionnaires (the CBA-20, the SAT-P, and the BISF-W) to 36 women who had been diagnosed with an HPV infection and 36 women who had never been diagnosed with HPV. RESULTS: 36% of the experimental group reacted to the diagnosis with fear and 29% reacted with anxiety, while in only 3% of the cases did the women react with anger. Significant differences emerged in two samples regarding state anxiety and obsessive and compulsive aspects, while there were no significant differences between the two groups regarding the subjective satisfaction with life quality and sexual function. A significant positive correlation was found between the sum of anxiety and fear expressed at the time of the diagnosis and the trait anxiety reported in the Cognitive Behavioural Assessment 2.0. CONCLUSIONS: The results indicate that the prevalent emotions felt at the time of the diagnosis are fear and anxiety. The persons who were diagnosed with an HPV infection resulted as having higher levels of trait anxiety, obsessions, compulsions, and above all, behaviours and worries related to hygiene and improbable infections.
