fuji test beam line commissioning y.sudo univ. of tsukuba

Fuji Test Beam Linecommissioning

Y.SudoUniv. of Tsukuba

Room for test beam @Fuji B3

We can control currents of magnets from this room.Network is ready.

M1M2

M3 M4M5

M6M7

position of magnets and monitors （ Fuji strait section ）

Trigger counter

Target + rate monitor Electron monitor(strip scintillator )

10/11 at 18:00 Magnets are turned on with 3.0GeV/c.

10/12 　 at 11:00HER started injection of beam.

Beam shutter

lead-glass counter

This stage is able to move only vertically.

Controller of the stage

Concreteblock

Beam line

Beam shutter Beam shutter

Result of last week and planHER 700mA, LER 1200mAWe 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%

Pulse shape of lead-glass counter