B13 - Detector Preamplifiers

ORTEC ®Detector Preamplifier OptionsUltra-High Count-Rate Preamplifier (PLUS Option)The Ultra-High Count-Rate Preamplifier (transistor-reset preamplifier) which may be ordered as the “PLUS” Option, is available forGEM or GAMMA-X detectors. This preamplifier, which can handle input count rates up to 1,000,000 counts/s at 1 MeV, offers theadded benefit of having no feedback resistor.PLUS Option Ordering InformationPlace the word PLUS after the GEM, GMX model number. Example: To order a 40% GAMMA-X (GMX) detector with resolutionspecification 1.95 keV, specify GMX40P4-76-PLUS.NOTE: For the best results at low energies with small planar Ge detectors, a Pulsed-Optical-Feedback (POF) preamplifier isrecommended. Call the factory for details.SMART-1 “Intelligent” Detector Option and Detector Interface Module (DIM)SMART-1 is a significant advance in the operation of HPGe detectors and is a major enhancement to data and chain-of-custodyintegrity. It is supported by the digiDART, DSPEC jr 2.0, and DSPEC pro revolutionary, small sized, low power, DIGITAL nuclearmultichannel analyzer systems. Both instruments are designed primarily with the needs of HPGe-detector gamma-ray spectrometry inmind. The SMART-1 HPGe detector has the high voltage included, so none of the instruments require an external high-voltage powersupply. The SMART-1 HPGe detector monitors and reports on vital system functions. Also, the SMART-1 identification serial numbercan 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 theattached instrument or computer, local or remote.SMART-1 PhysicalThe SMART-1 is housed in a rugged ABS molded plastic enclosure. TheSMART-1 is permanently attached to the detector endcap via a molded-strainrelievedsealed cable. This eliminates the possibility that the detector will suffersevere damage from moisture leaking into high-voltage connectors. The SMART-1 can be positioned in any convenient place and doesnot interfere with shielding or other mounting hardware.SMART-1 Ordering InformationTo order the SMART-1 option, add SMART-1 as a separate line item below the detector model specifications.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 sameconvenient housing as the SMART-1, but with flying leads (HV, Bias Supply Shutdown, Energy Output, Preamplifier Power, and InhibitOutput) to connect to the HPGe detector. The DIM does NOT provide SMART-1 functionality to a non-SMART-1 detector. It suppliesHV 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 toexisting detector cabling.• DIM-NEGGE For any non-SMART-1 negative-bias, HPGe detector. Includes short leads with mating connectors for connecting toexisting detector cabling.• DIM-POSNAI For any positive-bias NaI detector. Includes short leads with mating connectors for connecting to existing detectorcabling.

Detector Preamplifier OptionsDIM SpecificationsDimensions: 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: