Title :
Beam tests of the 10 keV injector for the University of Maryland electron ring (UMER)
Author :
Bernal, S. ; Li, H. ; Virgo, M. ; Kwon, S.P. ; Holland, M. ; Kishek, R.A. ; Valfells, A. ; Godlove, T. ; O´Shea, P.G. ; Reiser, M. ; Yun, V. ; Kehne, D.
Author_Institution :
Inst. for Res. in Electron. & Appl. Phys., Maryland Univ., College Park, MD, USA
Abstract :
Results are presented of the first experiments with a 10 keV, 100 mA beam in the matching section for UMER. The section, about 1.5 m long, consists of one short solenoid, six printed-circuit (PC) quadrupoles, a bend PC dipole, a number of steering dipoles, and two sets of Helmholtz coils for balancing the Earth´s field. The 2 RMS beam radius as a function of axial distance in the straight part of the beam line is obtained from fluorescent screen pictures. The results are compared with calculations using the K-V envelope equations. The importance of an accurate determination of the initial conditions, i.e. beam envelope size and slope at the entrance plane, as well as the emittance, is emphasized. Furthermore, the role of different types of errors, specially misalignment and quadrupole rotations is discussed
Keywords :
accelerator magnets; electromagnets; electron accelerators; electron beams; particle beam injection; storage rings; 1.5 m; 10 keV; 100 mA; Helmholtz coils; K-V envelope equations; UMER; University of Maryland electron ring; beam tests; bend dipole; injector; matching section; misalignment; printed-circuit quadrupoles; quadrupole rotations; short solenoid; steering dipoles; Apertures; Cathodes; Circuit testing; Coils; Educational institutions; Electron beams; Fluorescence; Magnetic fields; Physics; Voltage;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987299
