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MRG-500
Mössbauer Drive Unit
MRG-500.jpg

The Mössbauer Drive Unit MRG-500 is designed for controlling the Mössbauer Velocity Trans­ducers MA-260 and MVT-1000. Together with one these transducers, it forms a complete Mössbauer system, providing a precise g-source motion during Mössbauer effect measurements. A built-in digital function generator supplies the reference signal, which determines the waveform of the source motion. With SINE and TRIANGLE (CONSTANT ACCELERA­TION) the two most frequently used waveforms are available. They are stored digitally and are converted by means of a D/A converter to a highly precise analog signal, which is fed to the control circuit. Besides the analog signal, the function generator provides digital control pul­ses (START/CHANNEL ADVANCE), which can be used to synchronise a Multichannel Analyser. The ideal waveform and the deviation of the actual source motion from it can be monitored using the measuring signals available at the analog MONI­TOR and ERROR outputs.


SPECIFICATIONS
OUTPUTS
MONITOR
Analog signal, proportional to the correct value of the velocity
approx. 30 mV per mm/s
ERROR
Analog signal, proportional to the differ­ence between the actual and the correct value of the velocity
approx. 30 mV per mm/s
START/CHA (CHANNEL ADVANCE)
Digital signals for the synchronisation of the MCA.
Pulse Height
approx. 5 V
Pulse Length
approx. 1 μs
Impedance
50 Ω
CONTROLS
VELOCITY
Front panel 10-turn potentiometer for adjusting the velocity · Front panel toggle switch for reducing the range of adjustment to one tenth · Front panel toggle switch for turning the Velocity Transducer on and off
GAIN
Front panel 10-turn trim potentiometer for adjusting the amplification of the feedback loop
FREQ.RESP.
Front panel 10-turn trimpotentio­meter for adjusting the frequency response of the feedback loop
FREQUENCY
Front panel 10-turn potentiometer to adjust the frequency within the range 1... 50 Hz
CHANNELS
Front panel toggle switch for selecting the number of channels: 512 or 1024
MODE
Front panel toggle switch for selecting the waveform of the reference signal
SINE or TRIANGLE (CONSTANT ACCELERATION)
PHYSICAL
 
Double width NIM-module
Weight: 1.2 kg
POWER REQUIREMENTS
 
+ 6 V
± 12 V 200 mA
± 24 V 60 mA
or
+ 12 V 500 mA / -12 V 200 mA
± 24 V 60 mA
 
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