ANTERO SHAVANO Portable Neutron Spectrometer & Dose Equivalent Meter

Overview

The ANTERO SHAVANO is a field-deployable, solid-state neutron spectrometer and dose equivalent meter engineered for high-fidelity neutron radiation characterization in operational nuclear safety and homeland security environments. Unlike conventional thermal neutron detectors relying on ³He gas or scintillation-based systems, the ANTERO SHAVANO leverages Micro-Structured Semiconductor Neutron Detector (MSND) technology — a patented solid-state architecture developed by U2D, Inc. (USA). This design integrates precisely patterned boron-10 (¹⁰B)-loaded microchannels into silicon substrates, enabling efficient thermal and epithermal neutron capture via the ¹⁰B(n,α)⁷Li reaction while preserving spatial resolution and timing fidelity. The detector operates at low bias voltage (< 50 V), exhibits sub-microsecond pulse rise time, and delivers real-time neutron energy spectrum unfolding across the 0.025 eV–1 MeV range. Its compact form factor (8 lbs / 3.6 kg) and ruggedized IP65-rated enclosure support extended battery-powered operation in uncontrolled field conditions — from reactor containment perimeters to border checkpoint screening zones.

Key Features

• Micro-Structured Semiconductor Neutron Detector (MSND) core with ¹⁰B-enriched microchannel array for enhanced thermal/epithermal neutron detection efficiency (>3× higher than planar Si-based counterparts)
• Real-time neutron energy spectrum acquisition and dose equivalent rate calculation (H*(10)) compliant with ICRP-74 fluence-to-dose conversion coefficients
• Sub-2 mm intrinsic position resolution enables directional neutron source localization and angular distribution analysis
• Time-of-flight (TOF)-capable electronics with <100 ns timing resolution for pulsed neutron source identification (e.g., spontaneous fission, accelerator-driven sources)
• Integrated GPS, inclinometer, and environmental sensor suite (temperature, pressure, humidity) for georeferenced spectral logging
• Field-configurable measurement modes: dose rate (µSv/h), count rate (cps), unfolded spectrum (bins: 64–256 channels), and alarm-triggered event capture

Sample Compatibility & Compliance

The ANTERO SHAVANO is designed for direct measurement of neutron fields in mixed-radiation environments without external moderation or shielding. It maintains linearity over dose equivalent rates from 0.1 µSv/h to 10 mSv/h and demonstrates minimal gamma discrimination ratio (< 1×10⁻⁵ cps per mSv/h for ⁶⁰Co). Device firmware and data output comply with ANSI N42.33-2022 (Portable Radiation Detection Instrumentation) and IEC 62706:2015 (Neutron Survey Meters). All spectral processing algorithms are traceable to NIST neutron reference fields (e.g., NIST’s ²⁵²Cf and Am-Be calibration sources). The system supports audit-ready data export in IAEA-compliant .n42 format and meets GLP documentation requirements for regulatory reporting under 10 CFR Part 20 and DOE Order 458.1.

Software & Data Management

The ANTERO SHAVANO is operated via the U2D FieldSuite™ desktop and mobile application (Windows 10/11, Android 11+), which provides full spectral deconvolution using iterative maximum-likelihood estimation (MLE) with regularization constraints. Raw pulse-height spectra, time-stamped dose logs, and GPS-tagged location metadata are stored locally in encrypted SQLite databases and synchronized to secure cloud repositories via TLS 1.3. Software features include configurable alarm thresholds, spectral library matching (e.g., weapons-grade Pu vs. reactor-grade U), and automated report generation compliant with IAEA INFCIRC/225/Rev.5 Annex II. Audit trail functionality records all user actions, parameter changes, and calibration events in accordance with FDA 21 CFR Part 11 requirements.

Applications

• Nuclear nonproliferation and counter-terrorism: Localization and isotopic identification of concealed neutron-emitting materials (e.g., ²⁵²Cf, ²⁴¹Am-Be, plutonium metal) at ports of entry and critical infrastructure sites
• In-situ reactor monitoring: Real-time neutron flux mapping during refueling outages, spent fuel pool surveillance, and decommissioning activities
• Radiological emergency response: Rapid assessment of neutron contribution in mixed-field incidents involving damaged nuclear material or improvised radiological devices
• Health physics and ALARA program support: Personal and area neutron dosimetry validation, shielding effectiveness verification, and task-based exposure forecasting
• Research reactor and accelerator facility operations: Beamline characterization, neutron activation analysis support, and moderator performance evaluation

FAQ

What neutron energy ranges does the ANTERO SHAVANO measure?
It measures neutrons from thermal (0.025 eV) up to 1 MeV using intrinsic spectral response and unfolding algorithms — no external moderators required for broad-range characterization.
Does it require periodic recalibration against reference sources?
Yes; annual traceable calibration is recommended using NIST-traceable ²⁵²Cf and Am-Be neutron sources, with in-field verification possible via built-in electronic test pulses and ambient background consistency checks.
Can it distinguish between different neutron-emitting isotopes?
Yes — through spectral shape analysis and multivariate pattern matching against a curated library of reference spectra, including spontaneous fission (e.g., ²⁵²Cf), (α,n) sources (e.g., Am-Be), and fission chain signatures.
Is the device suitable for use in high-humidity or outdoor environments?
Yes — its IP65-rated enclosure, wide operating temperature range (−20 °C to +50 °C), and condensation-resistant optical interfaces ensure reliable deployment in maritime, desert, and arctic field conditions.
How is data integrity ensured during transmission and storage?
All data streams are cryptographically signed using SHA-256, timestamped with UTC-synchronized hardware clocks, and archived with immutable audit logs meeting ISO/IEC 17025 and NIST SP 800-53 Rev. 5 requirements.