
User Guide
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Vertilon Corporation, 66 Tadmuck Road, Westford, MA 01886 /Tel: (978) 692-7070 /Fax: (978) 692-7010 /www.vertilon.com
Product Overview
The SIB1064 sensor interface board allows the Hamamatsu S13615-1025N-08 8 x 8 multi-pixel photon counter (MPPC)
array to easily interface to a Vertilon PhotoniQ multichannel data acquisition system. The MPPC device is attached to the
bottom side of the printed circuit board where the 64 cathode output signals are routed directly to the sensor interface
board (SIB) connectors. The SIB connectors conform to Vertilon’s standard, low-noise, multi-channel, cable
interconnection system. The connectors mate to a micro-coaxial cable assembly that passes the 64 device outputs to the
PhotoniQ. Bias to MPPC array is provided on a high voltage cable by the PhotoniQ where it can be enabled and
configured through the PhotoniQ graphical user interface. A special current-sense output from the bias interface circuitry
is routed to the input of a variable gain preamplifier on the SIB1064 indicating the total AC current signal to all 64 MPPC
channels. This signal, which is available to the user on an SMB jack, is fed into a leading edge discriminator with a user-
programmable threshold. The discriminator generates a trigger signal on an SMB jack when an event exceeding a
predefined energy threshold is detected on the S13615-1025N-08 device. The trigger output is typically connected to the
trigger input on the PhotoniQ data acquisition system where it is used to initiate the collection of the energy signals from
the MPPC array connected to the DAQ system’s inputs. Alternatively, it can be connected to external digital timing
hardware such as a coincidence detector. A temperature sensor located on the SIB1064 provides a continuous readout
of the ambient temperature near the S13615-1025N-08. The full functionality and operation of the SIB1064 is
conveniently controlled through the PhotoniQ’s graphical user interface. Intelligent software in the PhotoniQ constantly
monitors the status of its SIB connectors to determine the type of sensor interface board attached to them. Once
recognized, a dialog box specific to the recognized SIB is made available in the GUI through which the user has complete
control over its operation.
The various functions on the SIB1064 are described in greater detail on the following pages. When necessary, refer to
the functional block diagram shown in Figure 1 below.
Interface board for Hamamatsu S13615-1025N-08 8 x 8 MPPC array
Supports 64 parallel charge output channels from MPPC array
Leading edge discriminator for event trigger and timing
Adjustable gain and threshold for discriminator channel
High voltage circuitry to bias the S13615 device
Integrated temperature sensor
100% compatible with Vertilon’s PhotoniQ 64 channel DAQs
Simplified control through PhotoniQ graphical user interface