JAEA-Review-2010-065.pdf:15.99MB - 日本原子力研究開発機構

5-03
Operation of the Electrostatic Accelerators
T. Agematsu a) , S. Uno a) , A. Chiba a) , K. Yamada a) , A. Yokoyama a) , Y. Saitoh a) , Y. Ishii a) ,
T. Satoh a) , T. Ohkubo a) , W. Yokota a) , T. Kitano b) , T. Takayama b) , S. Kanai b) ,
T. Orimo b) , Y. Aoki b) and N. Yamada b)
a) Department of Advanced Radiation Technology, TARRI, JAEA,
b) Beam Operation Service, Co., Ltd
1. Operation and Status
Three electrostatic accelerators were operated smoothly
in FY 2009, and all the planned experiments were carried
out except those canceled by users. The yearly operation
time of the tandem accelerator, the single-ended accelerator
and the ion implanter amounted to 2,100, 2,416 and 1,866
hours respectively, similarly to past years. The total
operation time of each accelerator since operation started
was 32,422, 36,864 and 28,875 hours, respectively. The
monthly operation time is shown in Fig. 1. Ion species
used for experiments in FY 2009 are also shown in Fig. 2.
Fig. 1 Monthly operation time of each
accelerator in FY 2009.
(C,Al,Au)
(Be,B,Al,Si,Mo,Ag)
JAEA-Review 2010-065
2. Maintenance
The number of troubles was smaller than that for past
years. Major maintenance performed in FY 2009 is as
follows;
Tandem accelerator: There was no trouble of accelerator
leading to cancelation of experiments. Minor repair and
scheduled maintenance were carried out.
Single-ended accelerator: The radio frequency oscillator
of the ion source mounted in high-voltage terminal and the
sequencer for control of the SB beam line have failed, and
they were changed to new ones.
Ion implanter: The oven controller of Freeman ion source
was renewed in February 2010.
3. New Beam Development
As to the ion implanter, intensity of Pt ion beam was very
small and we tried to generate Pd ion as an alternative. But
intensity of Pd ion beam can not be kept long time, and it is
insufficient now for experiments. We will study to keep
beam intensity long time.
As to the tandem accelerator, ion beam of Mn was
successfully generated and accelerated at intensity of
150 nA. We also tried to generate Yb ion, which was trial
development for expanding the variety of ion species as
lanthanoid group. However, beam intensity of the target
mass separated by analyzer magnet of accelerator was very
small, and it is insufficient for experiments.
(He,Li,B,C,O,Ne,S,K,Cr,
Mn,Ni,Ge,Xe,Tb,Pt,Bi)
Fig. 2 Ion species used for experiments in FY 2009.
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