Room Temperature ECR
We imported an ECR ion source - CAPRICE from Grenoble in 1987 and used it as preliminary heavy ion beams injector to HIRFL. This ion source can produce multi-charged ion beams, but the ion beam species, charge state and the extracted beams` intensity are all very limited. It could not satisfy the experimental requirements of IMP. By our years` research and modification on it, many improvements were made on it, and the quantity and quality of the extracted beams were greatly improved.
With our accumulated experience on ECR ion source, we then set about to manufacture an ECR ion source depending all upon ourselves. In 1995, LECR1 was successfully set up in Lanzhou. This was the first multiply charged ECR ion source developed in China. And it was a great progress and breakthrough on accelerator physics and technology in China.
LECR1 has the virtues like long running periods, excellent repetition, low energy dispersion and emission. It can provide multiply charged ion beams of all gaseous elements, as well as some solid ones. The key technique parameters of it have reached or even exceeded the international levels of alike ECR ion sources.
While designing, we based ourselves upon our present experience, and moreover we paid more attention to the latest techniques adopted abroad. The typical adopted special techniques are the designing of magnetic field configuration, the insulted structures, and the cold cathode electron gun. Especially, a new ECR working mode and a new magnetic field configuration were successfully tested. Thereby, it gave a new method to the research on the establishment of the plasma in multi-charged ECR ion sources.
This ion source has been in running for many years, and served many rounds of atomic experiments with highly charged ion beams. The results prove that LECR1 can provide intensive ion beams and its capability is stable and reliable. Now it has been removed from the ion injector beam line of HIRFL and placed at the hall of our lab.