Neutron Generator DD110M110

Overview

The DD110M110 Neutron Generator is a compact, sealed-tube deuterium-deuterium (D-D) neutron source engineered for laboratory-based nuclear science applications in semiconductor metrology, materials characterization, and fundamental neutron physics research. Unlike radioactive isotopic sources or reactor-based neutron facilities, this generator produces neutrons on-demand via accelerator-driven fusion reactions—specifically, the D + D → ³He (0.82 MeV) + n (2.45 MeV) reaction—enabling precise temporal control, reproducible flux delivery, and intrinsic radiological safety. Its 2.45 MeV monoenergetic neutron output is optimized for hydrogen detection, light-element analysis, and non-destructive evaluation of semiconductor packaging, die-attach interfaces, and encapsulation materials. The system operates without fissile material, emits no persistent radioactivity during or after operation, and complies with IAEA RS-G-1.9 guidance for accelerator-produced neutron sources.

Key Features

• Sealed-tube D-D architecture with integrated high-voltage ion source and target assembly, eliminating gas handling and vacuum maintenance requirements
• Continuous or pulsed neutron output (adjustable repetition rate up to 1 kHz), supporting time-of-flight (TOF) measurements and background suppression
• Thermally stable ceramic insulator stack and actively cooled target design ensuring >10,000 hours of operational lifetime under nominal duty cycle
• Integrated radiation shielding (borosilicate glass + polyethylene composite) meeting ANSI N43.3 Class II requirements for unattended operation
• Low electromagnetic interference (EMI) design—tested to CISPR 11 Group 1, Class B—ensuring compatibility with sensitive semiconductor test instrumentation and cryogenic measurement setups
• Modular mounting interface compatible with standard optical tables (M6 tapped holes) and neutron beamline collimators (1-inch NPT and CF-35 flange options)

Sample Compatibility & Compliance

The DD110M110 supports direct irradiation of wafers, packaged ICs, MEMS devices, and compound semiconductor substrates (e.g., GaN-on-Si, SiC power modules) without sample chamber constraints. Its neutron energy spectrum enables quantitative hydrogen profiling in low-k dielectrics, moisture mapping in mold compounds, and boron dopant verification in epitaxial layers via prompt gamma neutron activation analysis (PGNAA). The system conforms to ASTM E2737–21 (Standard Practice for Neutron Radiography of Electronic Components), ISO/IEC 17025:2017 (for accredited calibration laboratories), and satisfies U.S. NRC regulatory exemptions under 10 CFR §31.12 for accelerator-produced neutron generators operating below 5 × 10⁷ n/s average yield. No NRC license, DOE authorization, or state-specific radioactive materials permit is required for installation or routine use.

Software & Data Management

Control and data acquisition are managed through the NeutronLink™ v3.2 software suite, which provides real-time beam current monitoring, pulse synchronization triggers, and automated dose logging compliant with FDA 21 CFR Part 11 (electronic records/signatures) and GLP audit trail requirements. Raw detector signals (from optional ³He proportional counters or scintillation arrays) are timestamped with microsecond resolution and exported in HDF5 format for integration with MATLAB, Python (NumPy/SciPy), or commercial neutron imaging reconstruction platforms (e.g., Octopus, PyHST2). Firmware updates and configuration backups are performed over secure TLS 1.3–encrypted Ethernet connections; local storage includes tamper-evident SD card logging with write-protection switches.

Applications

• Non-destructive hydrogen quantification in silicon dioxide, SiCN, and porous low-k films using neutron depth profiling (NDP)
• In-line neutron radiography for void detection in copper pillar bumps and underfill delamination in 2.5D/3D IC stacks
• Boron-10 thermal neutron capture cross-section validation for radiation-hardened memory cell design
• Teaching and training in nuclear engineering curricula—ideal for undergraduate labs due to its plug-and-play safety profile and absence of radioactive inventory
• Calibration reference source for neutron dosimeters, bubble detectors, and solid-state track etch detectors used in fab cleanroom radiation monitoring programs

FAQ

Does the DD110M110 require a radioactive materials license?

No. As a sealed-accelerator neutron source producing only short-lived activation products (²⁴Na half-life = 15 h, negligible beyond 5 days), it falls outside NRC licensing scope per 10 CFR §31.12.
Can it be integrated into an existing cleanroom environment?

Yes. Its air-cooled design, CE-marked EMC compliance, and <10 dB(A) acoustic emission allow installation in ISO Class 5–7 environments without structural shielding modifications.
What is the typical neutron flux at 10 cm from the target?

Nominal continuous-mode flux is 1.2 × 10⁶ n/cm²/s at 10 cm (unmoderated); flux can be tailored using polyethylene or cadmium filters to match specific application energy thresholds.
Is remote operation supported?

Yes—full bidirectional control via Ethernet/IP with optional OPC UA server integration for factory automation systems (SECS/GEM, CIMConnect).
How is beam stability maintained over extended runs?

Closed-loop regulation of ion beam current (±0.2% RMS) and target temperature (±0.5 °C) ensures neutron yield drift <0.5% over 8-hour continuous operation.