DT5781

The CAEN Mod.DT5781 is a compact desktop system integrating 4 Independent 16k Digital MCA for digital nuclear Spectroscopy. A version with 2 independent 16k MCA is also available (DT5781A). It is ideally suited for high energy resolution semiconductor detectors, like HPGe and Silicon, connected to a Charge Sensitive Preamplifier (CSP) but it can also properly work directly connected to a PMT with inorganic scintillators (Nal, Csl) and other types of crystal, provided that the pulse shape is exponential and the decay time is long enough (typ. > 200 ns).

The module houses 4x (or 2x) 100 MS/s 14-bit waveform digitizer (based on 724 series) on single-ended inputs with BNC connectors, featuring 4-step software configurable input range and adjustable DC offset via a 16-bit DAC on each input in the full range.

Thanks to its two independent inputs of simultaneous acquisition, the DT5781 is able to manage coincidences and anticoincidences between a pair of detectors, allowing the user, for example, to easily take advantage of background rejection or anti-Compton techniques.
The module has been designed to operate as a scalable multi-input, multi-board acquisition system, offering synchronization capabilities.

The DT5781 houses USB 2.0 and Optical Link interfaces. USB 2.0 allows data transfers up to 30 MB/s. The Optical Link supports transfer rate of 80 MB/s and offers Daisy-chain capability. Therefore, it is possible to connect up to 8/32 MCA modules to a single Optical Link Controller (Mod. A5818/A4818).

Operating modes: 

• “Pulse Height Analysis (PHA)”: pulse height histogram (1k-2k-4k-8k-16k) built at software level.

• “List mode”: pulse height and time stamp for each event.

• “Oscilloscope” mode: input and internal filters waveforms.

Software available (Windows and Linux):

CAEN provides drivers for all the different types of physical communication channels, a set of C and LabView libraries (CAENComm, CAENDigitizer, CAENDPP), demo applications and utilities:

• CAENUpgrader: tool that allows the user to update the firmware of the digitizers, change the PLL settings, load, when requested, the license for the pay firmware and other utilities.

• MC² Analyzer: Digital MCA Data Acquisition and Analysis Software designed for CAEN Digital Multi Channel Analyzers and Digitizers running Pulse Height Analysis. (Windows only).

• CoMPASS: Multiparametric DAQ Software for Physics Applications designer for CAEN Digitizers running Pulse Shape Discrimination and Pulse Height Analysis, CAEN Pulse processors and MCAs.