Reading Atto group Hydrogen/Deuterium dissociation Time of flight hardware integration and data...
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Reading Atto group Hydrogen/Deuterium dissociation Time of flight hardware integration and data acquisition The University of Reading Leszek Frasinski, Marek Stankiewicz, Justin Steele–Davies, Gavin Waters
Transcript of Reading Atto group Hydrogen/Deuterium dissociation Time of flight hardware integration and data...
Reading Atto group
Hydrogen/Deuterium dissociation
Time of flight hardware integration and data acquisition
The University of Reading
Leszek Frasinski, Marek Stankiewicz, Justin Steele–Davies, Gavin Waters
Experimental setup
• Time of flight drift tube.• MCP position
insensitive detectors.• Hypodermic needle
used to supply gas.• Shot for shot intensity
measurement!
The University of Reading
TOF spectraThe University of Reading
The University of Reading
Disassociation inhibited
H2
Separation dependency
• High field tunnel ionisation.
• Outer part of wave function ionised.
• Strong intensity dependence.H Posthumus et al, 2000
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Dissociation ratiosThe University of Reading
Hardware
• MCA-3 made by FAST ComTec• Multi channel analyser,
Time to digital converter,
Pulse height analysis.
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Hardware
• P7887 made by FAST ComTec
• Time to digital converter.
• 250fs resolution (no dead time)
• Multi stop, list mode compatible.
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Program OverviewThe University of Reading
LabView
Pressure gauges & gas handling system.
(RS232)
Time to digital converter.
List or Averaging mode
(Internal PCI)
Multichannel Analyzer.
List or Averagingmode
(Internal PCI)
National InstrumentsDAQ Card.
(Internal PCI)
MCDwin GUIMCDwin GUI
Drift Tube PhotodiodePID controller
&Gauge controller
