@inproceedings{830b59771ed04559b18ea0de9f2a868f,
title = "Methods to obtain high intensity proton ion beams with low emittance from ECR ion source at Peking university",
abstract = "With the development of accelerator technology, to obtain an ion beam with high intensity and low emittance is becoming one of the main goals of research for ion sources. At Peking University (PKU) we have developed several 2.45 GHz Permanent Magnet Electron Cyclotron Resonance (PMECR) ion sources for different projects. More attentions were paid on beam intensity increasing and beam emittance reduction. The essential methods to improve beam intensity are increasing the plasma density inside the discharge chamber and improving extraction efficiency of the wanted ions. To suppress the emmitance increasing of an extracted beam, the shape of the electrodes as well as the voltage of suppression electrode and the perveance of extraction system have been carefully selected. With these efforts, a 120 mA total proton beam with a duty factor of 10% has been extracted from the PMECR ion source at 50 kV, and the measured normalized rms emittance is less than 0.2 π mm.mrad. The beam current density at the extraction aperture is as high as 424 mA/cm2.",
author = "Ren, {H. T.} and Peng, {S. X.} and Lu, {P. N.} and M. Zhang and Zhou, {Q. F.} and Yuan, {Z. X.} and J. Zhao and Guo, {Z. Y.} and Chen, {J. E.}",
year = "2011",
language = "English",
isbn = "9789290833666",
series = "IPAC 2011 - 2nd International Particle Accelerator Conference",
pages = "3463--3465",
booktitle = "IPAC 2011 - 2nd International Particle Accelerator Conference",
note = "2nd International Particle Accelerator Conference, IPAC 2011 ; Conference date: 04-09-2011 Through 09-09-2011",
}