RESUMO
The high current ion source with the low energy beam transport (LEBT) will serve as injector into the proton LINAC to provide primary proton beam for the production of antiprotons. The pulsed ion source developed and built in CEA/Saclay operates with a frequency of 2.45 GHz based on ECR plasma production with two coils with 87.5 mT magnetic field necessary for the electron cyclotron resonance. The compact LEBT consists of two solenoids with a maximum magnetic field of 500 mT including two integrated magnetic steerers to adjust the horizontal and vertical beam positions. The total length of the compact LEBT is 2.3 m and was made as short as possible to reduced emittance growth along the beam line. To measure ion beam intensity behind the pentode extraction system, between solenoids and at the end of the beam line, two current transformers and a Faraday cup are installed. To get information about the beam quality and position, the diagnostic chamber with different equipment will be installed between the two solenoids. This article reports the current status of the proton injector for the facility of antiproton and ion research.
RESUMO
Spinal anaesthesia is a safe, routinely performed procedure. However, in patients with lumbar cutaneous abnormities or deformities of the lower extremities, a previously undetected spinal anomaly may be present. In such patients, it may be prudent to avoid central neuraxial block to prevent neural damage. This instructive case presents such an adult patient in whom previously undiagnosed diastematomyelia, low conus and tethered cord was discovered only in the assessment of postspinal neurological symptoms.
