Przystosowywanie cyklotronu AIC-144 do protonowej radioterapii oka część 4. Poprawa jakości próżni w komorze cyklotronu, usprawnienie systemu sterowania traktem wiązki, zmniejszenie obciążeń zmęczeniowych komory akceleracji

Abstract

This article concerns adaptation of the cyclotron AIC-144 to radiotherapy of eye melanoma. The first part of the article describes suppression of residual fumes inside the cyclotron chamber. In order to attain this new vacuum configuration turbomolecular pumps have been installed and the ion source has been supplied with hydrogen of high purity. The result was: better stability of the proton beam, increase of deflection coefficient and ion source life-span. Second part describes the system of control and power supply of transport ion beam to the therapy post. Next there is a description of the system which counteracts the mechanical stress in the cyclotron chamber. The both enterprises improve operational reliability, reduce downtime, increase comfort of service. The tests confirmed usefulness of the executed works.