Hungary, 1121 Budapest, Konkoly-Thege Miklós út 29-33 +36.1.392.2642 +36.1.392.2282 1991–2018 Mirrotron Ltd.

Neutron Choppers

Disc Choppers      Fermi Choppers      Beam Choppers      Servodrive System      Magnetic Bearing Solution      LisTOF DAQ Module

Disc Choppers

  • Servo or magnetic bearing drive
  • Single or dual disk configurations
  • Disk diameter up to 700 mm
  • Symmetric or asymmetric cut-outs
  • Speed up to 20,000 RPM for symmetrical cut-out disc
  • Speed up to 15,000 RPM for asymmetrical cut-out disc
  • Neutron tested transmission
  • Transmission down to 10-8 is achievable
  • Possibility of neutron guide integration in common vacuum space with Chopper housing
  • Ability to park the disk at any angle within ±1 degree
  • Operates in vacuum of 10-2 mbar or better
  • No cooling necessary in conditioned environments
  • 10B / Gd2O3 coating

Fermi Choppers

  • Design with magnetic bearing
  • Speed up to 36,000 RPM
  • Single or dual slit package
  • Accurate translation device for dual chopper
  • Slit package frame is made of high-strength aluminium alloy
  • Slit material: Boron/Gadolinium coating/foil
  • Slit material: Aluminium or Silicon
  • Operates in vacuum of 5·10-2 mbar or better
  • Air or water cooling option
  • Payload mass: 7.25 kg
  • Complete Safety Analysis Design package

Beam Chopper

  • Custom design
  • Variable speed and diameter available
  • 10B / B4C / Al / Cd absorbing layer
  • Absorption neutronically tested
  • Calibrated in neutron beam
  • For beam testing and TOF analysis
  • Control electronics with phase control
  • Vacuum / air conditions

Servo Drive System

  • Advanced control algorithms provide phase control of the system to 99% repeatability ±6 µs at 50 Hz (i.e. within 0.040 n degrees of alignment with its windows on each revolution)
  • Ability to park the disk at any angle within ±1 degree
  • Integrated frameless brushless servo motor, on the shaft allowing high speeds to be achieved
  • Up to 12000 rpm
  • Withstands 3.5 Mrad of gamma radiation dosage level
  • On board vacuum control is available
  • On board vibration control is available
  • Remote/Local control
  • Operating software is available

Magnetic Bearing Solution

  • Magnetic bearing spindle with controller, supplied by SKF
  • Magnetic bearing solution for low loss operation in vacuum environment
  • Advanced control algorithms provide phase control of the system to 100% repeatability ±10 µs at 60 Hz (i.e. within 0.054 degrees of alignment with its windows on each revolution)
  • Subsynchronous phase control of the system to 6 Hz
  • Ability to park the disk at any angle within ±1 degree
  • Radial bearing capacity is 265 N; thrust capacity is 220 N
  • Integrated DC brushless, constant-torque (0.14 Nm) motor to the shaft allowing high speeds to be achieved
  • Withstands 3.5 Mrad of gamma radiation dosage level
  • Operating software is available

LisTOF DAQ Module

  • Similar to TDC
  • Measurement of a number of parallel events
  • Synchronization of Units
  • 30 to 200 Channel Management in 1 Device
  • Data gathering
  • Series of filters
  • Histogram generation
  • Events are recorded in lists
  • Lists are processed into histograms
  • Lists remain available for revisiting
  • Common 2D Event List
  • 2D information (X & Y) extracted from Stop signals
  • Spectral 2D Event List
  • 2D plus wavelength information extracted from chopper events