BELLE Detector Roll-in on May 1st
The tuning of the BELLE detector has
been carried out by measuring millions of
cosmic rays with the solenoid excited. The
performance of detector components has reached
the designed one. So the BELLE group decided
to move the detector system from the assembly
area to the beam collision point (experimentalists
call it as "Roll-In") in the Tsukuba
hall.
The "Roll-In" was taken place on
May 1st, 1999. The detector system (weight
1500 ton. in total) sitting on a movable
platform moved with a speed of 0.5meter/min
along steel rails by a hydraulic driving
mechanism. From 10:00 am, it started moving
toward the beam collision point slowly over
13 meter distance. It took 30 minutes to
finish this "long trip". After
the "Roll-In", many works to connect
the BELLE to the accelerator system will
be made and finally the beam operation will
resume on May 25th. The pictures below show
these scenes.
Click picture for large photo (60-68KB)
