Absolute calibration up to 20 MeV of an online readout CMOS system suitable to detect high-power lasers accelerated protons.

We present the design and absolute calibration of a charged particle online readout CMOS system tailored for high-power laser experiments. This system equips a Thomson parabola spectrometer, which is used at the Apollon petawatt scale laser facility to measure the spectra of protons produced by high-intensity laser-target interactions. The RadEye1 CMOS matrices array detectors are paired with a custom triggering system for image grabbing. This allows us to register the proton and ion signals remotely. The repetition rate is presently 1 shot/min, but the frame grabbing enables the system to be compatible with modern high-power lasers running, e.g., at 1 Hz. We detail here the implementation, in the harsh electromagnetic environment of such interactions, of the system, and its absolute calibration, which was performed for proton energies from 4 to 20 MeV.

[Rapid diagnosis of tuberculous meningitis by polymerase chain reaction. A case in an infant]. / Diagnostic rapide de la méningite tuberculeuse par polymerase chain reaction. Une observation chez un nourrisson.

A fifteen-month-old child was admitted with a week history of isolated fever. On CSF (Cerebral Spinal Fluid) examination, hyperproteinorachy, hyperglycorachy and hypochlorurachy were found. The diagnosis of tuberculosis meningitis was suspected but usual tests were unable to find Mycobacterium tuberculosis in CSF, urine and sputum. Only the Polymerase Chain Reaction detected the Mycobacterium tuberculosis genome in the CSF. A specific treatment was started immediately. Apyrexia was obtained within 2 days; the outcome was favorable, without sequelae.