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Title: Reduction of Beam Current Noise in the FNAL Magnetron Ion Source

The new FNAL Injector Line with a circular dimple magnetron ion source has been operational since December of 2013. Since the new injector came on line there have been variations in the H- beam current flattop observed near the downstream end of the linac. Several different cathode geometries including a hollow cathode suggested by Dudnikov [1] were tried. We expanded on those studies by trying mixtures ranging from 0.25%N, 99.75%H to 3%N, 97%H. The results of these studies in our test stand will be presented in this paper.
Authors:
 [1] ;  [1] ;
  1. Fermilab
Publication Date:
OSTI Identifier:
1326612
Report Number(s):
FERMILAB-CONF-14-356-AD
Journal ID: ISSN 0094--243X; 1319822
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Journal Volume: 1655
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS