A5202 & DT5202

Technical specification

MECHANICAL

• Dimensions Weight: 72.8 W x 22.0 H x 174.5 L mm3 132 g

INPUTS

• 64 channels (= 2 Citiroc-1A chips)

SIGNAL POLARITY

• Positive

SENSITIVITY

• Dual range: Low Gain (LG)/High Gain (HG). Channel-by-channel individual setting of the gain value through a CSP feedback capacitor, Cf, adjustable from 25 fF to 1575 fF (25 fF step):
  • LG = 1.5 pF/Cf (max gain = 60)
  • HG = 10 x LG = 15 pF/Cf (max gain = 600)

DYNAMIC RANGE

• The Citiroc-1A Preamplifiers ensure a dynamic range from 160 fC to 400 pC (i.e. from 1 to 2500 photo-electrons with 106 SiPM gain)

SHAPING TIME

• Slow Shaper 7 options from 12.5 ns to 87.5 ns (12.5 ns step)
• Fast Shaper Fixed: 15 ns

FRONT PANEL I/Os

• 4 general purpose programmable LEMO I/Os connectors available:
  • 2 (T0-IN and T1-IN) to be used as input (LVTTL and NIM)
  • 2 (T0-OUT and T1-OUT) to be used as output (LVTTL)
• The T1-IN and T0-IN connectors are 50 Ω terminated with a jumper. The jumper can be moved to perform a bridged connection for daisy chain trigger distribution or wired-OR in a multi-board system.

DIGITAL PROBE

• LVTTL signal with different functions can be transmitted via the front panel output connectors.

ANALOG PROBE

• MCX connectors allowing the user to acquire analog signals from a specific, software selectable stage of each Citiroc-1A signal shaping chain:
  • LG/HG Preamplifier output
  • LG/HG Slow Shaper output
  • Fast Shaper output

SELF-TRIGGERS

• Programmable 10-bit DAC for common threshold
• Minimum threshold: 1/3 photo-electron
• Separate trigger line per channel
• Programmable 4-bit DAC for channel-by-channel threshold fine adjustment
• Logic combination (AND, OR, Majority) of triggers for start of A/D conversion and time reference.

EXTERNAL TRIGGERS

• From TDlink, T1-IN or T0-IN. T0/T1 lines can be daisy chained (IN-OUT) or wired-OR (bidirectional) to share a common global trigger between multiple units.

HIGH VOLTAGE POWER SUPPLY

• Single channel PCB mounted A7585D High Voltage Power Supply:
  • Common SiPM bias voltage: 20 ÷ 85 V
  • Setting precision: ±0.2%±50 mV
  • Individual channel adjustment: 8-bit (2.5 V or 4.5 V dynamic range, 10% tolerance)
  • Max. output bias current: 10 mA (software programmable limit)
  • Programmable temperature compensation

ACQUISITION MODES

• Spectroscopy Mode (PHA)
  • Simultaneous acquisition of all channels
  • 13-bit A/D conversion
  • Systematic conversion time ∼ 10 µs (Max. trigger rate ∼ 100 kHz)
  • Independent digital thresholds for channel-by-channel zero suppression (ZS)
• Counting Mode
  • Channel-by-channel independent counting
  • Common trigger to define counting window (Dwell time)
  • Maximum counting rate (per channel): ∼ 20 Mcps
• Timing Mode
  • Independent channels (merged list, time sorted)
  • 0.5 LSB resolution (∼ 250 ps RMS)
  • Time stamp referred to a common time reference coming from T0-IN/T1-IN connectors or from the logic combination of channel self-triggers
  • Spectroscopy information (lower resolution) from Time over Threshold (ToT) information

TIME STAMP

• 56-bit counter, 8 ns step
• Up to 128 boards can be synchronized with the DT5215 FERS-CB by sending a time stamp reset signal via TDlink

COMMUNICATION INTERFACES

• USB Ethernet Optical Link
  • USB2.0: microUSB connector
  • Bandwidth = ∼ 3 MB/s
• Ethernet connector, type Rj-45. Supports 10/100 Mbit/s connection to a PC
  • Bandwidth = ∼ 2.5 MB/s
• Optical Link
  • Small Form Factor Pluggable (SFP+) transceiver component for optical connection (3.125 Gbit/s). TDlink CAEN proprietary protocol allows for multi-board synchronization, slow control and data readout
  • Data Concentrator DT5215 required

FIRMWARE

• Firmware can be upgraded via USB, Ethernet or Optical Link (starting from firmware revision 7.5)
• Firmware of μC can be upgraded via Ethernet only

SOFTWARE

• Readout SW
  • Fully controlled by the Janus open source software for Windows® and Linux®.
  • It can run in console mode (C program, with console commands and gnuplot display for plots) or connected to a GUI (Python) that implements user friendly configuration panels and run controls.
  • Janus can acquire, plot and save output files with PHA, ToT histograms, as well as list files (energy and timestamp for each channel).
• Web Interface
  • Board information and monitoring, Ethernet configuration.

POWER REQUIREMENTS

• Single power supply (+12 V). Regularly working in a range between +7 V and +15 V

POWER CONSUMPTIONS

• 750 mA @ +12 V, i.e. ≈ 9 W (acquisition on, all channels enabled, HV on, 64 SiPMs mounted)
• 685 mA @ +12 V, i.e. ≈ 8.2 W (acquisition off, all channels enabled, HV off, no SiPMs mounted)