DigiDART-LF Portable "SMART" MCA for NaI(Tl), LaBr and other Scintillation Radiation Detectors
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Portable “SMART” MCA for NaI(Tl), LaBr and other Scintillation Detectors • High-performance and RUGGED, 2k channels. • Available as a complete package including integrated probe. • DIGITALLY stable: consistent answers for long counts, changing count-rates and temperatures. • Operates WITHOUT an attached PC. • Built-in backlit LCD display and control keypad — Live display of acquiring data. • Nuclide ID and activity calculation for nine Regions of Interest (ROI). • Fits in the palm of your hand or hangs from your belt. • Holds >150 2k channel spectra in internal memory. • Battery life >9 hours. • Only 860 grams, excluding batteries. The ORTEC digiDART-LF is a high performance Multichannel Analyzer for use with NaI(Tl) detectors and modern scintillators such as lanthanum halides. It has been carefully engineered to perform the most demanding real world, PORTABLE gamma-ray spectroscopy applications. The digiDART-LF is an advanced, all-digital design, incorporating three ORTEC-held patents.1 digiDART-LF. . . Tough, Yet Light Weighing less than 860 grams, the digiDART-LF is an attractive, light-weight instrument; easy to handle, and RUGGED. The case is molded ABS — the same strong plastic used extensively in automobiles. The outside is coated with a shock-absorbing, easy-grip, stay-clean coating — just like your other tools. The display and keypad are recessed to protect them if the instrument is dropped. The connectors are all on one side and recessed for protection. The battery is inside — again for added protection and covered with a splash-proof door. It can be charged in place, even when the digiDART-LF is operating. The battery is truly integrated into the rugged digiDART-LF and not simply clipped on the back panel; exposed and easy to break. Changing the battery is simple: just open the door and replace. digiDART-LF Display and Keypad Naturally, the digiDART-LF is entirely computer controllable; but with the built-in display and numeric keypad, it is a DRAMATIC advance from the current generation of portable MCAs. This high-quality display and easy to use keypad mean it can perform a variety of tasks without an attached PC. For in-field applications, a PC is difficult to carry and operate, but without a display you can't see the spectrum or results. The digiDART-LF's built-in, backlit LCD display panel and keypad provide the confidence you need that your data is good. A clear spectral display is provided and start/stop control is accomplished simply by a single keypad entry. The spectral display of the digiDART-LF is patterned after ORTEC's very successful MAESTRO MCA Emulator, in use on thousands of systems worldwide. A 240 x 160 pixel LCD display allows the user to monitor acquisitions and instrument settings status, with no attached PC. It features a live spectral display with region of interest, peak information and online activity calculations. ROIs are shown as a bar below the spectrum. Real Time Activity Calculations. . . NO PC Required! DigiDART-LF can also perform nuclide ID and activity calculations using internally stored calibration information, at the touch of a button, and all without the use of an attached PC. Everything is user controlled: the library for analysis, displayed peak labels, unit labels and calibration parameters. They are all easily downloaded by MAESTRO to the digiDART-LF, but they can be changed in-field to adapt to your changing needs. Activity is calculated for a list of up to 9 nuclides. The spectral data can be saved and later re-analyzed in more detail using a more sophisticated PC-based analysis package such as A66SV-BW GammaVision Gamma Spectroscopy software for scintillation detectors.

Operator Menus All of the digiDART-LF screens and operations are set using the keypad and the display. The operation is simple — select what you want from the displayed list by number and the Enter key. The main groups are: View Status, Enter ID, Nuclide ROI contents, Peak Info, Select ROIs, Select Status contents, Adjust controls, general settings and View memory contents. The complete list of all functions is given in the specification section. Using the keypad and the display, the MCA settings can be verified or changed in the field without a host computer. Protection Protection of the...

MCA Specifications Maximum system throughput >100,000 cps. System Gain Settings Coarse Gain: 1,2, 4, 8, 16, or 32. Fine Gain: 0.45 to 1. Preamplifiers: INPUT accepts either positive or negative pulses with rise time of 10 to 650 ns and decay times of 40 |js to t»; Zin > 1000 Q dc-coupled; linear maximum 10 V; absolute maximum 20 V. System Conversion Gain: Software controlled from 512 to 2k channels. Digital Filter Shaping-Time Constants Rise times: 0.8 js to 20 js in steps of 0.2 js. Flat tops: 0.5 to 2.0 in steps of 0.1 js. Dead-Time Correction: Extended live-time correction according to...

Use of the digiDART-LF with Lanthanum Bromide (LaBr) Detectors The digiDART-LF is compatible with the increasingly popular lanthanum bromide detectors. A separate brochure on these detectors and their use with ORTEC instrumentation is available on request. 2BY2 and 3BY3 Integrated NaI Probes are everything that is required in one compact package. The models 2BY2 and 3BY3 are complete NaI(Tl) probes with single cable connection to the digiDART-LF, ready to go to work. They contain everything you need: a 2" x 2" ORTEC Model 905-3 or 3” x 3” 905-4 integral NaI(Tl) detector coupled to a DIM-296...