218M Optical Chopper & Control Module

  • 418M Optical Chopper & Control Module
Call us:
+44 (0)118 975 1355

Four easily-interchangeable chopping discs are provided as standard which allow chopping frequencies in the range of 5Hz to 3kHz.

Key features of the 218F, such as phase jitter, frequency stability and a long motor life, have been prioritised over more esoteric features not required in most applications to offer outstanding performance in a cost effective solution.

Core benefits

Features

  • Modular optical chopper control unit with remote chopper providing frequencies of 5Hz-3kHz
  • Square wave reference output for use with lock-in amplifiers
  • Front panel control
  • Arrest function for source integrated arrestable choppers
  • Fully programmable via USB 2.0 interface

Electrical

Chopping Frequency with 2-slot blade5Hz to 500Hz
Chopping Frequency with 5-slot blade12.5Hz to 500Hz
Chopping Frequency with 10-slot blade25 Hz to 1kHz
Chopping Frequency with 30-slot blade75 Hz to 3kHz
Phase Jitter with 2-slot blade 0.6° pk-pk over entire frequency range.
Phase Jitter with 5-, 10- and 30-slot blades1° pk-pk over entire frequency range.
Reference Output800mV positive going wave from 200W, sensed by IR LED/photodiode mounted on chopping head
Resolution1Hz with 10-slot disc
MotorHigh quality 11-pole DC motor with precious metal commutator
Temperature Dependence of Frequency StabilityLess than 0.01% change per K
Line Voltage Dependence of Frequency StabilityLess than 0.01% change results from a change in line voltage from 190V to 265/ 95V to 130V

Interface & Mechanical

ControlFront panel
Front Panel Controlled FeaturesChopping frequency set, chopper on/off
DimensionsSingle width module, 3U high
Connector Amphenol (chopper), BNC (reference)

Ordering Information

S200_218_M218M Optical Chopper & Control Module
S200_218_BBlade set (2, 5, 10 and 30 slot)
S200_218_HChopping head
SUND_CMPChopper mounting plate for monochromator entrance slit
17596Chopper mount for IL1, IL6, IL7 and IL8

The Bentham Standard

We’re with you from the first call to the final result

Call us on +44 (0)118 975 1355 or email us