Abstract
Development of an efficient low‐energy beam transport section (LEBT) is an important issue in accelerator research. An experiment is undertaken to build up an electrostatic quadrupole (ESQ) lens system with an aim to transport a 30 mA, 35 kV H− beam, with normalized beam brightness of ∼8×1010 A/(m‐rad)2, over a length of about 30 cm and match it into a radio‐frequency‐quadrupole. Beam parameters of a Penning‐Dudnikov type ion source at the AT‐1 test stand at Los Alamos National Laboratory are used. The LEBT section consists of six electrostatic quadrupole lenses. The apparatus is designed by detailed computer code simulation of beam dynamics. An emittance growth of about 80% is predicted in transporting the beam through the ESQ system. The ESQ lens system is fabricated. Tests of the system are planned to validate the design parameters, voltage hold‐off of the quadrupole assembly, etc. Critical issues on the design of the apparatus and its fabrication will be discussed.
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