IDP / IDP 1000 Series

A system for analysis of ions, neutrals and radicals in UHV desorption studies

  • Model: IDP / IDP 1000 Series
  • Manufacturer: Hiden Analytical


The Hiden IDP (Ion Disorption Probe) is for the direct analysis of low energy ions from UHV surface science techniques. Applications include electron stimulated desorption, photon stimulated desorption and thermal desorption studies.


  • Surface science
  • Catalysis

The Hiden IDP Probe is a quadrupole mass spectrometer system configured with ion optics, ion extraction lens and integral electron impact ion source.


The Hiden IDP is for the direct analysis of low energy ions and neutrals from UHV surface science techniques. Applications include electron stimulated desorption, photon stimulated desorption and thermal desorption studies.

Additionally the system can be used as a high sensitivity residual gas analyser at UHV pressures.

Hiden IDP systems are directly PC controlled, Windows® MASsoft Professional PC software is included as standard and provides comprehensive data acquisition and presentation routines.

The Hiden IDP probe features

  • Mass Range options 50 amu, 300 amu, 510 amu, 1000 amu, and 2500 amu.
  • Ion counting detection – positive and negative ion.
  • 7 decade detector 1 to 107 c/s with continuous seven decade data presentation.
  • Integral IDP ion optics.
  • Integral UHV compatible analyser shroud.
  • Temperature reading integrated into data displays for thermal desorption applications.
  • Peak Integration with base line subtraction for desorption profile analysis.
  • Direct pulse rate output as a TTL signal.
  • External pulse gating input.
  • Windows® MASsoft Professional PC software with RS232 and Ethernet communication links.

IDP 1000 Operating Modes include

  • Systems include pre-set software modes for Leak detection, Trend analysis, Histogram scan and Profile peak scan with 0.02 amu increment over a user selectable mass window.
  • Background subtraction, providing subtraction of a designated spectrum from real time acquired data. Background subtraction operates for Histogram scans, Trend Analysis, Leak detection and Profile peak scans.
  • Trend analysis with real time plotting of peak intensities on a time axis, with tabular and graphical data views plotted simultaneously. Up to 100 mass channels can be programmed.
  • Peak Integration with base line subtraction providing integration of user selectable desorption profiles from trend analysis data.
  • Each mass channel in a trend analysis can have its own mass spectrometer parameter set for optimising the acquisition for each species.
  • Trend analysis channels are automatically set up by a simple double click selection on the required species names from the on board library list or they can be manually selected by typing the required mass number and species name.
  • Socket Interface for application control and dynamic data link with Windows® compliant applications.
  • Map mode for continuous display of mass selected ion intensity as a function of selected ion source parameters.
  • Electron energy scanning of a mass selected ion intensity for determination of appearance potentials and differentiation of radicals from a parent stable neutral molecule.
  • Quadrupole mid-axis potential scanning in the range -100 V to +100 V for retarding field energy analysis.
  • Mixed mode scanning. A user editable scan generator enables customisable data acquisition and multi window data displays including user selected views of profile peak, trend analysis (tabular and graphical), and histogram data simultaneously.
  •  Automatic tuning and on-line manual tuning of all ion source parameters under slide bar control.
  • Review and compare historical data simultaneously with real time data.
  • Data export facilities to ASCII files and Windows® supported output devices.
  • An integral ‘events’ program provides a user editable interface to link data to the integral input/output subsystem.
Mass Range 1:50 amu , 1:300 amu, 2:510 amu, 2:1000 amu, or 10:2500 amu.
Maximum  Operating  Pressure 5 x 10-6 mbar. 1×10-4 mbar with Faraday option
50 amu system 0.1% Valley between adjacent peaks of equal height throughout the mass range.
300/510 amu systems  1% Valley between adjacent peaks of equal height throughout the mass range.
1000 amu systems 10% Valley between adjacent peaks of equal height throughout the mass range.
2500 amu systems 10% Valley between adjacent peaks of equal height to 1000 amu, peak width at 2500 amu is 4 amu.

Software adjustable for high resolution applications.

Abundance Sensitivity 0.1 parts per million
Detector Air stable pulse ion counting electron multiplier.

1 up to 107 counts/s into 24-bit resolution counting electronics.

Measurement speed
Maximum measurement speed 650 measurements per second.
Dynamic Range From 1 count/s to 107 counts/s.

Continuous Logarithmic or Linear display.

Signal Gating Detector gating by direct TTL input, gating resolution to 0.1 µsecond.
Signal Output Direct TTL pulse output is available through a BNC rear panel connector.
Analogue Inputs 2 Analogue inputs, user labelled and scalable in units of user choice. 
Ion extraction lens Extractor lens, software settable and scanable from -370 V to +370 V. 
Ion focus lens 3 element lens, software settable and scanable from -370 V to +370 V
Integral Ion Source Electron bombardment type radially symmetric with two side mounted oxide coated iridium filaments.
Ion source software control Emission current 1µA – 2mA

Electron Energy 4 – 150 eV

Source cage 0 – 10 V

Source focus 0 – 150V

Quadrupole pole bias control The mid-axis potential of the IDP system is selectable and scanable in the range ± 100 eV.
Vacuum protection External interlock for remote protection. Internal trip operation in RGA mode only.
Vacuum  bakeout 250°C
Analyser mounting flange DN-100-CF (6″/150 mm OD Conflat-type) base flange. 9 mm rod diameter systems include an adaptor housing for mounting to a DN-63-CF (4.5”/114 mm OD conflat type).
Analyser insertion length from base flange face 434 mm from DN-100-CF base flange

220 mm from 9 mm pole diameter systems DN-63-CF adapter housing flange.

RC7 Control interface unit Height: 315 mm/7U

Width: 19″ rack mounting

Depth: 450 mm

RF head amp dimensions Free-standing module 345 mm x 160 mm x 125 mm
RF generator dimensions Free-standing module 437 mm x 272 mm x 270 mm with 0.9m RF cables to the analyser head.
Cable lengths
RC interface to RF head 3 m standard.

Longer lengths to 30 m available

RC interface to PC Up to 15 metres with RS232 link.

Up to 750 metres with unbridged Ethernet link.

5 m Ethernet and 5 m RS232 cables included.

Power   requirement 110-120 VAC, 220-240 VAC, 0.25kVA

Hiden IDP Quadrupole Mass Spectrometer for low energy ion analysis in electron or photon stimulated ion desorption studies


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