V5 MSND® Lithium-6 Thermal Neutron Detector
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | V5 |
| Pricing | Upon Request |
| Thermal Neutron Detection Efficiency | 20–30% ±1% |
| Max. Neutron Count Rate | <1 cps |
| Gamma Rejection | <1 cps under ¹³⁷Cs irradiation (5.0×10⁴ γ/cm²/s) |
| Power Consumption | <1 mW |
| Active Area | 4 cm² |
| Output Interface | Digital TTL, SMA connector, USB |
Overview
The V5 MSND® Lithium-6 Thermal Neutron Detector is a solid-state, low-power neutron sensing module engineered for high-fidelity thermal neutron detection in nuclear safeguards, reactor monitoring, radiation portal surveillance, and research-grade neutron beamline instrumentation. Unlike traditional ³He-based proportional counters—whose global supply has been severely constrained since the early 2010s—the V5 implements proprietary MSND® (Microstructured Semiconductor Neutron Detector) technology, utilizing enriched ⁶Li conversion layers integrated with silicon semiconductor readout architecture. This design enables direct charge collection from the ⁶Li(n,α)³H reaction products (alpha particle and triton), eliminating gas amplification stages and associated operational complexities. The detector operates at ambient temperature without bias voltage or quenching gas, delivering stable, pulse-mode digital output with intrinsic gamma discrimination capability. Its 4 cm² active area provides scalable spatial coverage while maintaining sub-milliwatt power draw—making it suitable for battery-powered, distributed, or embedded radiation monitoring systems compliant with IEC 62706 and ANSI N42.33 standards.
Key Features
- MSND® solid-state architecture replaces legacy ³He tubes with enriched ⁶Li-conversion on monolithic silicon—eliminating pressurized gas, high-voltage operation, and temperature sensitivity.
- Thermal neutron detection efficiency of 20–30% ±1% (measured per ASTM E2698-21 using calibrated ²⁵²Cf and moderated Am-Be sources).
- Gamma rejection ratio >10⁵:1 against ⁶⁶² keV photons from ¹³⁷Cs, verified under continuous irradiation at 5.0×10⁴ γ/cm²/s flux density.
- Ultra-low power consumption (<1 mW typical), enabling integration into energy-constrained platforms including wireless sensor nodes and UAV-mounted payloads.
- Digital TTL output synchronized to neutron capture events; no analog pulse shaping or external discriminator required.
- Integrated IC module includes onboard signal conditioning, dead-time correction, and real-time count rate estimation (0–1 cps range).
- Standard interfaces: SMA coaxial connector for TTL pulses, micro-USB for configuration, firmware updates, and streaming histogram data.
Sample Compatibility & Compliance
The V5 detector requires no sample preparation or encapsulation—it responds exclusively to incident thermal neutrons (E<0.5 eV) moderated by standard polyethylene or graphite reflectors. It is insensitive to fast neutrons unless coupled with an external moderator assembly. The device complies with ISO/IEC 17025 calibration traceability requirements when used with NIST-traceable neutron sources. Its mechanical housing meets IP54 environmental rating, and electromagnetic compatibility conforms to EN 61000-6-3 (emission) and EN 61000-6-2 (immunity). For regulatory deployment in nuclear facility monitoring, the V5 supports audit-ready logging via USB, including timestamped event records aligned with UTC, satisfying GLP and IAEA INFCIRC/225/Rev.5 documentation expectations.
Software & Data Management
A cross-platform (Windows/macOS/Linux) configuration utility is provided via USB interface, allowing users to adjust acquisition parameters—including pulse width filtering, internal clock calibration, and firmware version verification. Raw TTL pulses are time-stamped with ≤1 µs resolution and can be streamed to host systems for spectral analysis or integrated into SCADA architectures via Modbus TCP or OPC UA gateways (adapter kit optional). All firmware binaries undergo SHA-256 integrity verification prior to installation. Audit logs—including detector uptime, error counters, and configuration changes—are stored in non-volatile memory and exportable as CSV or JSON for QA/QC review. The software stack adheres to FDA 21 CFR Part 11 principles where electronic records are employed in regulated environments.
Applications
- Nuclear material accountancy and spent fuel verification in dry cask storage facilities.
- Real-time thermal neutron flux mapping in research reactor reflector regions and beam shutters.
- Portable neutron source localization during radiological emergency response (e.g., RDD detection).
- Neutron dosimetry validation in mixed-field radiotherapy bunkers (paired with TLD/OSL dosimeters).
- Education and training: compact, safe, and maintenance-free alternative to ³He detectors in university nuclear engineering labs.
- Long-term unattended monitoring of uranium enrichment cascades under IAEA safeguards protocols.
FAQ
Is the V5 detector sensitive to fast neutrons?
No—it is intrinsically optimized for thermal neutrons. Fast neutron response requires external moderation; performance under such configurations must be empirically characterized per ISO 8529-1.
Can multiple V5 modules be synchronized for coincidence counting?
Yes—TTL outputs support external triggering and time-of-flight alignment with ≤5 ns jitter using common clock distribution.
What calibration documentation is supplied?
Each unit ships with a certificate of conformance, NIST-traceable efficiency calibration report (per ASTM E2698), and gamma rejection test data under ¹³⁷Cs exposure.
Does the detector require periodic recalibration?
No—MSND® architecture exhibits negligible long-term drift; annual verification against reference sources is recommended per ISO/IEC 17025.
Is firmware upgrade capability field-accessible?
Yes—USB-based updates preserve all user configuration settings and include rollback support for validated versions.
