ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Direct fast H− beam chopping in a surface-plasma-type negative hydrogen ion source has been studied at KEK. The H− beam is chopped at several MHz by modulating the converter bias voltage of the ion source. However, in this case, a slow rise time of the chopped H− beam is one of the most serious problems for synchrotron injection. In order to make the rise time faster, a negative voltage was applied to the anode electrode. In the new scheme, mesh inserts were installed inside the ion extraction hole of the anode. Applying a retarding voltage on the meshes, the fast beam chopping was tested and the results are reported and discussed in the article. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1150264
