Fuji Test Beam Line commissioning

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Fuji Test Beam Linecommissioning

• Y.Sudo
• Univ. of Tsukuba

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Room for test beam _at_Fuji B3
We can control currents of magnets from this
room. Network is ready.
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position of magnets and monitors(Fuji strait
section)
Target rate monitor
Electron monitor(strip scintillator )
M1
M2
M3
M4
M5
M6
Trigger counter
Beam shutter
M7
10/11 at 1800 Magnets are turned on with
3.0GeV/c. 10/12 at 1100 HER started injection
of beam.
lead-glass counter
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Beam shutter
Beam shutter
Concrete block
Beam line
This stage is able to move only vertically.
Controller of the stage
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Result of last week and plan

• HER 700mA, LER 1200mA
• We observed beam 30Hz.
• Beam energy looks constant.
• (according to oscilloscope)
• When shutter is closed, rate of
• the beam goes down 0Hz.
• Plans of this week
• Measurement of correlation
• between beam intensity and
• - HER current
• - condition of the vacuum
• correlation of intensity between upper side of
  shutter and lower side
• Measurement of beam profile with electron
  monitor.
• Adjustment of magnets
• adjust currents of B2-4 between -1 and 1