Hiden IDP Ion and Molecular Analysis Mass Spectrometer

Overview

The Hiden IDP Ion and Molecular Analysis Mass Spectrometer is a research-grade, triple-filter quadrupole mass spectrometer engineered for high-fidelity detection and energy-resolved characterization of ions, neutral species, and radicals generated in surface science and ultra-high vacuum (UHV) experiments. Unlike conventional residual gas analyzers (RGAs), the IDP integrates pulsed ion counting, quadrupole biasing, and time-gated signal acquisition to enable simultaneous mass and kinetic energy analysis—critical for electron-stimulated desorption (ESD), photon-stimulated desorption (PSD), and temperature-programmed desorption (TPD) studies. Its core architecture employs a robust three-stage quadrupole mass filter coupled with an advanced four-element ion optical train, allowing precise transmission and energy discrimination of low-energy desorbed species (down to thermal energies) while maintaining high mass resolution and long-term signal stability. Designed and manufactured in the UK by Hiden Analytical—a leader in UHV-compatible process and analytical mass spectrometry—the IDP meets stringent requirements for reproducible quantitative analysis under demanding vacuum conditions (<1×10⁻¹⁰ mbar typical operating range).

Key Features

• Pulsed ion counting detector delivering continuous dynamic range across seven orders of magnitude (10⁷), enabling quantification from trace-level (5 ppb) to bulk-phase (100%) species without detector saturation or gain switching.
• Triple-filter quadrupole design optimized for high mass fidelity up to 2500 amu (optional), with standard configuration covering 1–300 amu and selectable resolution modes (0.1% and 1% valley resolution).
• Integrated ion energy analyzer with programmable ±100 eV bias (extendable to ±1000 eV), facilitating direct measurement of ion kinetic energy distributions—essential for mechanistic interpretation of desorption pathways.
• Time-gated signal acquisition with 0.1 µs temporal resolution, supporting time-of-flight (TOF)-compatible experiments, transient reaction monitoring, and synchronized temperature ramp correlation during TPD runs.
• Four-stage ion optics incorporating a built-in electron/ion source and UHV-compatible shielding, ensuring optimal ion transmission efficiency and minimizing background contributions in sub-monolayer surface analysis.
• Real-time temperature synchronization during thermal desorption protocols, with direct readout and logging of heater thermocouple data alongside mass spectral acquisition.

Sample Compatibility & Compliance

The IDP is compatible with UHV surface science chambers (typically ≤1×10⁻¹⁰ mbar base pressure), molecular beam epitaxy (MBE) systems, catalysis reactors, and plasma-surface interaction setups. It interfaces seamlessly with common UHV feedthroughs and differential pumping stages. The instrument conforms to CE marking requirements and operates within electromagnetic compatibility (EMC) Directive 2014/30/EU standards. Its hardware and MASsoft software support audit-ready data handling aligned with GLP and GMP principles, including full electronic record retention, user-access controls, and timestamped metadata capture per ICH-GCP and ISO/IEC 17025 guidelines. While not FDA 21 CFR Part 11 certified out-of-the-box, the MASsoft Professional Suite provides configurable electronic signature and audit trail modules suitable for regulated environments upon validation.

Software & Data Management

Control and data acquisition are managed via MASsoft Professional—a Windows-based application developed exclusively for Hiden instrumentation. MASsoft supports real-time spectral display, multi-channel time-series plotting, mass calibration (linear and quadratic), energy scale calibration, and automated sequence scripting for unattended TPD or ESD experiments. All raw and processed data are stored in vendor-neutral HDF5 format, ensuring long-term archival integrity and interoperability with third-party analysis tools (e.g., Python SciPy, MATLAB, Igor Pro). Export options include CSV, ASCII, and XML; metadata fields include vacuum pressure, ion source parameters, lens voltages, gate timing, and temperature logs. Remote operation is supported over Ethernet using TCP/IP protocol, enabling integration into centralized lab automation frameworks.

Applications

• Surface reaction kinetics and reaction intermediate identification in heterogeneous catalysis under operando conditions.
• Quantitative analysis of desorbing fragments during ESD/PSD of functionalized surfaces, thin films, and 2D materials.
• Energy-resolved mapping of ion emission thresholds in oxide and semiconductor interfaces.
• Radical detection and stoichiometric tracking in plasma-assisted thin-film deposition and etching processes.
• In-situ monitoring of volatile organic compound (VOC) evolution during thermal aging of battery electrode materials.
• Isotopic ratio tracking in tracer studies involving deuterated or ¹³C-labeled precursors.

FAQ

What vacuum level is required for optimal IDP performance?

The IDP is designed for ultra-high vacuum environments, with recommended operating pressure ≤1×10⁻⁹ mbar for maximum sensitivity and minimal background interference.
Can the IDP detect neutral species directly?

Yes—when combined with electron impact or photoionization sources (e.g., Hiden’s EGA or VUV lamp options), the IDP enables soft ionization of neutrals, permitting their mass-resolved detection and quantification.
Is MASsoft compatible with Linux or macOS?

MASsoft Professional is native to Windows OS (Windows 10/11, 64-bit); however, remote control via Ethernet and HDF5 data export ensure cross-platform post-processing capability.
How is calibration performed for mass and energy scales?

Mass calibration uses known reference gases (e.g., N₂, Ar, CO₂); energy calibration employs retarding field analysis with tunable lens bias—both procedures are guided interactively within MASsoft.
Does the IDP support multi-user access with role-based permissions?

Yes—MASsoft supports user profiles with configurable access levels (view-only, acquisition, calibration, admin), supporting shared facility management and compliance with multi-operator laboratory workflows.