64 Channel Readout Module for Multi Anode Photomultipliers

The ROSMAP-MP is a compact readout module for multi anode photomultiplier tubes (MaPMT). The module can operate both in spectroscopy mode and timing mode. The mechanical interface is designed to fit the Hamamatsu H8500C and H12700 MaPMTs. Two variants of the ROSMAP-MP are available, namely the ROSMAP-MP-80 and the ROSMAP-MP-200, which have dynamic ranges of -80pC and -200pC, respectively.

In spectroscopy mode the ROSMAP-MP can read out all 64 channels upon a trigger (68k events/s), or only the triggered channel (200k events/s). The event energy is digitized with 13-bit resolution, and the pulse-height is transmitted along with the timestamp and channel ID. In timing mode, the module detects events up to a rate of up to 1M events/s, and only transmits information about the channel ID and timestamp. The trigger threshold can be set individually for each channel to cope with gain variations of the MaPMT.

IDEAS Testbench software is delivered with the module to ensure that the user can quickly start operating the ROSMAP-MP. This software allows module configuration, readout in all operating modes, pulse-height and histogram visualization and data logging to file. It also includes a Python interpreter for scripting. An API is also available, enabling creation of custom software solutions.

The size of the module is 50 mm x 50 mm, which allows it to fit entirely behind the Hamamatsu MaPMT tube. The module depth is 55 mm, and its mass is 113 g.
The ROSMAP-MP is controlled via an Ethernet interface, and powered by a 5V power supply. It is possible to synchronize several modules via the sync inputs.

Product Features

DetectorHamamatsu 8500C, Hamamatsu H12700
Number of inputs64
Input charge range (ROSMAP-MP-80)0 pC to -80 pC
Input charge range (ROSMAP-MP-200)0 pC to -200 pC
Max event detection rate68k/200k/1M events/s (all channel/one channel/timing)
Shaping time1.4 μs
Charge value ADC resolution13 bit
Trigger thresholdProgrammable
Data interfaceEthernet
Power supply5 V
Power consumptionCa. 3.2 W
Dimensions50 mm x 50 mm x 55 mm
ApplicationGamma cameras, spectroscopic detectors, scintillator based pixellated detectors