Abstracts Brochure - CERN

WEPCH189
WEPCH190
WEPCH191
28-Jun-06 16:00 - 18:00 WEPCH — Poster Session
Design of the 20MeV User Facilities of Proton Engineering Frontier Project
K. R. Kim, Jae-Keun Kil. Kil, Chan-Young Lee. Lee, J.S. Lee, B.-S.
Park (KAERI)
328
The user facilities of PEFP (Proton Engineering
Frontier Project) was designed. It is composed
of two beamlines at the first stage and
has possibility of expansion to five beam-
lines. One is low flux beamline for the technology developments in the fields of biological and space sciences
and the other is high flux beamline for the utilization in the fields of nano and material sciences. The flux density is
1E+8∼1E+10 protons/cm2-sec and 1E+10∼1E+13 protons/cm2-sec each. The available energy range is 5∼20MeV and
the irradiation area is larger than 10cm in diameter with uniformity more than 90% for both. The specifications of
these beamlines mentioned above were decided on the basis of result of user demand survey and operation experience
of 45MeV proton beam test beamline installed at the MC-50 cyclotron of KIRAMS (Korea Institute of Radiological and
Medical Science). The key components of these beamlines are bending magnets, magnetic quadrupole doublet or
triplet, collimators, scanning magnets, target stage with water cooling system, degrader for energy control, scattering
foils for flux control, etc. The beam optics was calculated using TRANSPORT and TRACE 3D simulation code.
Design of a Ridge Filter for 36MeV Proton Beam Applied to BT and ST
We designed a ridge filter to obtain a uniform
Y.K. Lim, K. R. Kim (KAERI)
depth-dose distribution as well as to deliver
high linear energy transfer along the depth
of a target for 36MeV proton beam. Aluminum was chosen as the material of the filter to reduce the radioactivity
induced by proton irradiation. The designed ridge filter has a continuous cross-sectional line shape of ridges so that
the smoothly varying depth-dose distribution can be maintained before the distal fall-off for lower proton energy than
36MeV. The height of the ridge is 6 mm, its period is also 6 mm and the minimum thickness is 0.3 mm. A Monte Carlo
simulation code, MCNPX 2.5.0., was used to calculate the dose distributions. The width of the calculated uniform
dose region was 11 mm for 36MeV proton beam in a water-equivalent sample.
The Design and Manufacture of a 300 keV Heavy Ion Implanter for Surface Modification
of Materials
A 300keV ion implanter has been designed
J.S. Lee, Jae-Keun Kil. Kil, Chan-Young Lee. Lee (KAERI)
for studies of surface modification of several
materials by ion beam. The purpose of design
is domestic development of the basic technology for the high energy ion implanter. The main point of design
is production, acceleration and transportation of high nitrogen ion beam current up to 5mA and ion energy up to
300keV. 300keV ion implanter consists of Duo-PIGatron ion source, einzel lens, mass separation magnet, acceleration
tube, magnetic quadrupole doublet, electrostatic scanner and target. Beam optics design carried out where space
charge effect in the acceleration tube and second order aberrations in the mass separation magnet were considered.
The mass numbers range from 1 to 140 and the resolving power M/∆M is 131. Implanter control system includes
fiber optics links for the monitoring and control of the ion source parameters in the high voltage zone and computer
system for the characterization of the ion beam and whole control of an implantation process.