학술논문
Beam Quality Improvement at JULIC
Document Type
Periodical
Author
Source
IEEE Transactions on Nuclear Science IEEE Trans. Nucl. Sci. Nuclear Science, IEEE Transactions on. 26(2):2007-2011 Apr, 1979
Subject
Language
ISSN
0018-9499
1558-1578
1558-1578
Abstract
To improve the external beam quality at JULIC, three different measures have been undertaken: the development of a systematic procedure for beam phase optimization, the precise adjustment of the center region to nominal values as well as the installation of harmonic coils near the cyclotron center and the introduction of two axial phase slits according to calculations for proper axial imaging. Starting with a cyclotron as it was tuned in the former day by day operation, the successive application of the above means resulted in an improvement of the radial emittance by a factor of 2 to 10 mm.mrad and of the energy resolution by a factor of 3 to below 1.5.10-3. The three different means for better machine tuning and their effect on the external beam quality are described.