Wiseman MRS20kV/100W Microchannel Plate Detector High-Voltage Power Supply Module

Overview

The Wiseman MRS20kV/100W is a compact, high-stability, instrument-grade high-voltage (HV) power supply module engineered specifically for scientific detection systems requiring precise, low-noise, and highly reproducible bias voltages. Designed for integration into microchannel plate (MCP) detectors, electron multipliers, and other vacuum-based particle or photon detection assemblies, this module delivers regulated DC output up to 20 kV at 100 W continuous power. Its core architecture employs zero-current resonant switching and advanced high-voltage insulation techniques to achieve exceptional stability (<0.05% over 8 hours), ultra-low ripple (≤0.25% peak-to-peak at full load), and minimal temperature drift (0.01%/°C). Unlike general-purpose HV supplies, the MRS series is optimized for signal integrity in low-current, high-impedance sensing environments—critical for time-of-flight mass spectrometry (TOF-MS), secondary electron amplification, and single-particle counting applications where baseline noise and voltage drift directly impact detection limit and quantitative accuracy.

Key Features

• Programmable output range: 0–20 kV DC with polarity selection (positive or negative), supporting both MCP stack biasing and dynode chain configurations
• 100 W continuous output capacity with efficient thermal management—enabling stable operation in enclosed instrument chassis without forced air cooling
• Low-noise design: output ripple maintained at ≤0.25% P-P under full-load conditions, minimizing spurious signal artifacts in sensitive detector electronics
• High short-term and long-term stability: ≤0.05% variation over 8-hour periods post warm-up; ≤0.01% per 8 hours for precision calibration-critical setups
• Comprehensive protection suite: hardware-limited overvoltage shutdown, current-foldback short-circuit response, arc detection with automatic recovery, and safety interlock interface (24 V logic-compatible)
• Flexible analog remote control: 0–10 V input for proportional voltage/current setpoint adjustment; internal 10 V reference enables external potentiometer interfacing
• Six-sided mu-metal–enhanced shielding minimizes EMI coupling—essential for co-location with low-level preamplifiers or RF-sensitive components
• OEM-ready mechanical form factor: 143 × 100 × 42 mm footprint, 1 kg mass, and terminal-block I/O simplify integration into custom detector housings or analyzer subassemblies
• CE-marked and compliant with EN 61000-6-3 (emissions) and EN 61000-6-2 (immunity), supporting laboratory and industrial deployment under EU regulatory frameworks

Sample Compatibility & Compliance

The MRS20kV/100W is routinely deployed as the bias source for microchannel plate detectors in time-of-flight mass spectrometers (e.g., MALDI-TOF, TOF-SIMS), electron multipliers in residual gas analyzers (RGAs), and anode supplies in proportional counters used in nuclear physics experiments. Its low leakage current (10¹⁴ Ω), and controlled rise/fall time (<500 ms for 0–20 kV step) ensure compatibility with ultra-high vacuum (UHV)-compatible detector stacks and minimize charging transients during pulsed operation. The module meets essential requirements for GLP-compliant instrumentation: traceable voltage regulation, built-in analog monitoring outputs (0–5 V = 0–100% of setpoint), and passive fault logging via status pins. While not FDA 21 CFR Part 11–certified out-of-the-box, its analog control architecture supports integration into validated systems with external audit-trail-capable data acquisition layers.

Software & Data Management

The MRS20kV/100W operates as a standalone analog-controlled module and does not include embedded firmware, USB, or Ethernet interfaces. All operational parameters—including real-time voltage and current monitoring—are accessible via dedicated 0–5 V analog output signals (±1% accuracy at full scale), enabling seamless connection to third-party DAQ systems (e.g., National Instruments PXI, Keysight DAQ970A) or custom LabVIEW/Python control scripts. For OEM integration, Wiseman provides detailed pinout schematics, timing diagrams for interlock sequencing, and thermal derating curves across ambient temperatures (0–50 °C). Optional DIN-rail mounting kits and shielded HV cable assemblies (500 mm, 20 kV rated) are available to support repeatable system-level qualification testing per IEC 61010-1.

Applications

• Microchannel plate (MCP) detector biasing in mass spectrometry and surface analysis instruments
• Anode and dynode chain powering for photomultiplier tubes (PMTs) in fluorescence lifetime imaging (FLIM) and scintillation detection
• Electron multiplier voltage supply in residual gas analyzers and quadrupole mass filters
• Beam focusing and deflection electrode bias in electron/ion optics subsystems
• Ionization chamber and proportional counter high-voltage excitation in radiation measurement systems
• Capacitive charging for pulsed laser-triggered discharge sources and electrostatic precipitators
• OEM integration into portable analytical platforms requiring compact, low-EMI HV generation

FAQ

Is the MRS20kV/100W suitable for use in ultra-high vacuum (UHV) environments?
Yes—the module’s internal layout, conformal coating, and low-outgassing materials meet standard UHV compatibility guidelines when mounted externally to the vacuum chamber with appropriate feedthroughs. HV output must be routed via UHV-rated coaxial cables.
Can output polarity be switched in-field without hardware modification?
No—polarity is fixed per unit configuration (MRS20P = positive, MRS20N = negative). Selection must be specified at time of order.
Does the unit support digital communication protocols such as RS-232 or CAN bus?
No—it is analog-only. Digital control requires external DAC/ADC interfacing through the 0–10 V setpoint and 0–5 V monitor lines.
What is the maximum safe operating altitude for this module?
Rated for operation up to 2,000 m above sea level per IEC 60664-1; derating recommended above this elevation due to reduced dielectric strength of air.
Are calibration certificates provided with each unit?
Standard units ship with factory test reports (voltage accuracy, ripple, stability); NIST-traceable calibration certificates are available as a value-added option upon request.