The kicker magnet.
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A team of accelerator physicists from KEK and SLAC succeeded in
extracting 3 bunches of electron beam at a duration of 154 nano seconds -- a
milestone in realizing the beam control operation mode required in the
ILC.
The Accelerator Test Facility (ATF) is a unique place to test cutting edge
accelerator technologies required at the ILC. KEK is planning to extend
its beam diagnostics line to develop and test various kinds of new beam
diagnostics monitors and apparatus for the beam stabilization. It is
essential to achieve short duration beam bunches for the beam line at
337 nanoseconds or at 169 nanoseconds, which is the same as the planned operation
mode of the ILC.
Dr. Terunuma and the team who achieved the 3 bunches beam operation.
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Dr. Terunuma and his group have been developing a special type of magnet
system called a "kicker magnet" with a flat-top of 320 nanoseconds. The
magnet was developed by a SLAC team by modifying the epoxy kicker.
The
power supply has been replaced with the one proved to work at the ATF,
and they modified the entire system as "double kicker system". They
succeeded in extracting 3 bunches of electron beam at a duration of 154 nanoseconds
on 28 October.
"The collaboration of SLAC and KEK has led to this success", said
Terunuma. "We have installed the system into ATF in September and
started the operation in early October. It's a remarkable success to
achieve the required operation mode in such a short time scale".
--Youhei Morita
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