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Detailed introduction
- Portable - lightweight, can be operated with "one hand", and has GPS positioning function. The Detective X is approximately 50% lighter than the industry-leading ORTEC Detective-EX-100T.
- Extremely Rugged - Designed for Military Use. Withstands temperatures ranging from -20°C to +50°C. IP65 protection level (waterproof, dustproof) and anti-fall design.
- Algorithm - Excellent detection and nuclide identification capabilities and lower false alarm rate compared to other systems. More than 175 radionuclides are stored in the library.
- Autocalibration - Continuous real-time detector stabilization continuously calibrates the instrument.
- Enhanced communication capabilities - Equipped with IEEE 802.11a/b/g/e/i/h/j standards and IEEE 802.11n wireless, wired Ethernet, USB, Bluetooth, and remote control via smartphone (Android, iOS and Windows PC). Remote control and monitoring can be easily accomplished from the central control room.
- Optional Li6ZnS neutron detector (without 3He).
- Large capacity mobile USB flash drive.
- Easy to operate: bright, clear, sunlight-readable display touch screen and intuitive menus.
- Dual batteries (hot-swappable) provide up to 10 hours of operating time.
- Large HPGe crystal (65 mm x 50 mm).
Detective X algorithm
In addition to the inherent selectivity of the HPGe detector type, Detective X's ultimate performance in terms of identification fidelity also depends on software algorithms. ORTEC licensed the original Lawrence Livermore RadScout algorithm in 2003 and made numerous improvements to it over the years. For example, as part of the DHS/DNDO HPRDS program, ORTEC developed the Advanced HPRDS RIID (Micro-HPRDS) from 2008 to 2010. Advances in this algorithm have greatly enhanced nuclide identification capabilities and minimized false alarms. Over the past 10 years, ORTEC has participated in various testing events sponsored by DNDO, DoD/DTRA, IAEA, and the U.S. Department of Energy National Laboratories to continue to improve algorithms and upgrade radionuclide libraries. Detective X uses algorithms and a large 65 mm x 50 mm crystal, making it the most accurate RIID on the market. The probability of false positives and false negatives is further reduced. If decisions need to be made about potential threat sources, backup experts also need HPGe spectrum. It is widely considered the "gold standard".
Detective X Hardware Overview
ORTEC has over 12 years of experience in HPGe RIID. Input from users around the world has been incorporated into Detective X. Detective X is compact, lightweight and has rugged hardware. The 40% high-efficiency (65 mm x 50 mm) HPGe crystal in the "ultra-high vacuum" cryostat is cooled by an integrated low-power Stirling refrigerator. The new refrigerator equipped with Detective X can provide greater cooling capacity. The ultra-high vacuum cryostat does not contain traditional molecular sieves, allowing the instrument to be turned on or off at any time during the detector cooling or rewarming cycle without any risk. ORTEC is one manufacturer that offers this feature in its handheld HPGe RIID.
A built-in digital MCA system and a dedicated data processor will be delivered with the product. Detective X features a bright VGA resolution display and touch-sensitive operation screen that is readable under direct sunlight. The operation of Detective X is very intuitive. Radionuclide gamma-ray spectra can be displayed and manipulated (e.g., vertical scale, zoom) similar to traditional multichannel analyzers. Gamma count rate, neutron flux and gamma dose rate are displayed continuously.
Using Detective X: Overview
- The high-resolution, sunlight-readable color touch screen is designed for operating the system and entering data such as passwords and alarm limits.
- The three physical buttons on the device (Power, Navigate (N) and Select (S)) can also be used for inspection and spectrum collection operations.
Audiovisual feedback:
- Bluetooth headsets can be used for audio alarms. The handle provides a vibration alarm.
- The top of the screen displays the current dose rate in mrem/hr (or μSv or μGy). The corresponding icon shows whether the instrument has GPS activated (green) or inactive (red). The icons also show the status of MFK, Bluetooth, LCX mode stabilizer (when disabled) and WiFi (connected or not connected).
- When radiation is detected and recognized, the recognition results will be displayed in the real-time recognition area of the screen. This area lists the names of any radioactive isotopes currently detected.
operating mode
Detection mode operation
Detection mode is used to locate and identify sources. In this mode, the instrument continuously "seeks" but does not store data. The Detection Mode screen will display the detector count rate and dose rate. It is also in search mode and monitoring mode.
The "Detection Mode" screen displays a strip chart of "Signal Index" and "SNM Index" in the middle of the screen. The strip chart updates every half second. They are real-time indicators of the presence of radioactive material. The strip chart sometimes shows an increasing trend before the recognition results are displayed on the screen.
Inspection always starts with a measurement in inspection mode. Detective X is set to start automatically in detection mode.
Identify mode operations
This mode identifies radionuclides by counting a target object or area from a fixed location over an extended period of time. Collect data for a preset time period or before collection is stopped.
The identification mode can operate in "single" spectrum mode or "multispectral analysis" mode. The mode is selected by the administrator. Single spectrum mode will initiate spectrum collection and perform radionuclide identification as the spectrum is collected. In multispectral mode, background, known and unknown spectra are collected, automatically packaged and sent to the control center.
The default time is real time. During this time, the radionuclide ID is displayed on the screen as the nuclide name. The operator can view the spectrum in real time or have the screen display the ten gamma ray energies in the spectrum during identification.
Detective X and background radiation - no more NORM alerts
Unless the standard material is significantly higher than the stored background, Detective X can identify and suppress NORM identification results from the background measurement saved on the instrument.
Detective X and Digital Stabilization - Performance
Although the digital germanium spectrometer is a highly stable instrument under changing temperatures, the Detective X can even be used in conditions. The automatic gain stabilizer system will "lock" on the natural background K-40 peaks (if present) to ensure that calibration is achieved even under harsh processing conditions. The stabilizer is very "smart". If the K-40 is not found in the spectrum, the gain stabilizer will be turned off. Additionally, users can choose to disable the spectrum stabilizer and proceed directly to ID measurements to minimize setup time in mission-critical scenarios.
