SMART-1 is a significant advance in the operation of HPGe detectors and is a major enhancement to data and chain-of-custody integrity. It is supported by the digiDART, DSPEC jr 2.0, and DSPEC pro revolutionary, small sized, low power, DIGITAL nuclear multichannel analyzer systems. Both instruments are designed primarily with the needs of HPGe-detector gamma-ray spectrometry in mind. The SMART-1 HPGe detector has the high voltage included, so none of the instruments require an external high-voltage power supply. The SMART-1 HPGe detector monitors and reports on vital system functions. Also, the SMART-1 identification serial number can be read by the instrument. For more security it can save authentication codes and report the code at a later time.

ORTEC SMART-1 HPGe Detectors monitor the following conditions:

• Preamplifier +24 and +12 V values (read-only)
• Detector element temperature (read-only)
• Detector high voltage value (read-only)
• Detector high voltage state (on/off)
• Detector overload state (read-only)
• Detector HV shutdown state (read-only)
• Detector serial number (read-only)
• Detector authentication code (read/write)

These parameters are displayed as required on the LCD display of the attached instrument or computer, local or remote.

SMART-1 Physical
The SMART-1 is housed in a rugged ABS molded plastic enclosure. The SMART-1 is permanently attached to the detector endcap via a molded-strain-relieved sealed cable. This eliminates the possibility that the detector will suffer severe damage from moisture leaking into high-voltage connectors. The SMART-1 can be positioned in any convenient place and does not interfere with shielding or other mounting hardware.

The Detector Interface Module (DIM)
For older, non-ORTEC or non-SMART-1 detectors, the DIM is used to supply the HV for the detector. The DIM is provided in the same convenient housing as the SMART-1, but with flying leads (HV, Bias Supply Shutdown, Energy Output, Preamplifier Power, and Inhibit Output) to connect to the HPGe detector. The DIM does NOT provide SMART-1 functionality to a non-SMART-1 detector. It supplies HV and preamplifier power as well as providing warm-up protection for he HPGe detector.

The following DIMs support non-SMART-1 detector systems:

• DIM-POSGE For any non-SMART-1 positive-bias, HPGe detector. Includes short leads with mating connectors for connecting to existing detector cabling.
• DIM-NEGGE For any non-SMART-1 negative-bias, HPGe detector. Includes short leads with mating connectors for connecting to existing detector cabling.
• DIM-POSNAI For any positive-bias NaI detector. Includes short leads with mating connectors for connecting to existing detector cabling.

Specifications

Dimensions: The DIM is shaped for easy mounting; the maximum dimensions (including mounting lugs) are 12 cm x 8.2 cm x 3.3 cm (4.7 in. x 3.2 in. x 1.3 in.)

Weight: <240 gm (0.5 lb.)

Performance

• DIM-POSGE Output 0 +5 kV, 100 MΩ impedance
• DIM-NEGGE Output 0 -5 kV, 100 MΩ impedance
• DIM-POSNAI 0 +1800 V, 600 ľA below 1000 V, 300 ľA maximum above 1000 V

DIM Connectors

Multi-Pin connector for attachment to instrument (mating cable is provided with instrument)

DIM-POSGE and DIM-NEGGE (these connectors will mate directly with most standard HPGe detectors)

• Preamplifier Power: 9-PIN D female 1 W maximum (+12 V, 12 V, +24 V, 24 V, 2 GND)
• Analog In: BNC male
• Bias Shutdown In: BNC male
• Bias Out: SHV (HV) female
• TRP Inhibit Out/Coincidence Gate In: BNC male (function is software selected)

DIM-POSNAI

• Preamplifier Power: 9-PIN D female 1 W maximum (+12 V ,12 V, +24 V, 24 V, 2 GND)
• Analog In: BNC male
• Bias Out: SHV (HV) female
• Coincidence Gate In: BNC male

DIM-296 Option for 14 Pin PMT NaI Detectors
The DIM-296 option is an alternative to the DIM-POSNAI for NaI detectors with a standard 14-Pin base. The DIM-296 is a 296 ScintiPack with a single cable connection, ten feet in length for direct connection to the instrument.

• For scintillation detectors employing 10-stage PMTs that fit standard 14-pin sockets
• Convenient, single-cable connection direct to instrument
• Internal, adjustable, high-voltage bias supply eliminates high-voltage cables
• Active bias network minimizes peak shifts at high counting rates
• Low power consumption (240 mW) for portable applications