UNDERWATER MUON DETECTOR SIPM FRONT.pdf

UNDERWATER MUON DETECTOR SIPM FRONT-END CARD REQUIREMENTS

INPUTS 64 channels 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 v/v) ‐ HG = 10 × LG = 15 pF/Cf (max gain = 600 v/v)

DYNAMIC RANGE 160 fC to 400 pC

SHAPPING TIME:

7 options from 12.5 ns to 87.5 ns (12.5 ns step) Fixed: 15 ns

SELF‐TRIGGER REQUIREMENTS

‐ 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 TRIGGER

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. More details in Sec. 8.4.5 and Sec. 8.4.6 respectively.

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 ns 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

Spectroscopy and Timing Mode ‐ 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) ‐ 0.5 ns 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

TRIGGER TIME STAMP

‐ 56‐bit counter, 8 ns step

HIGH VOLTAGE POWER SUPPLY

Single channel PCB mounted A7585D High Voltage Power Supply:

‐ Common SiPM bias voltage: 20 ÷ 85 V ‐ Settling precision: ± 20 mV ‐ Individual channel adjustment: 8‐bit (2.5V or 4.5V dynamic range) ‐ Max. output bias current: 10 mA 1(software programmable limit) ‐ Programmable temperature compensation

COMMUNICATION INTERFACES

USB

USB2.0 connector, type microUSB‐B Ethernet Ethernet connector, type RJ‐45. Supports 10/100 Mbit/s connection to a PC TDlink Optical link (4.25 Gbit/s) with synch distribution to allow for multi‐board synchronization, slow control and data readout.

FIRMWARE Upgradeable

SOFTWARE Fully controlled by vendor supplied software (Windows or Linux)

POWER CONSUMPTIONS

10W Max for 64 channels

UNDERWATER MUON DETECTOR SIPM CONCENTRATOR REQUIREMENTS

OPTICAL I/O

8 Channel Pluggable (SFP+) transceiver components for optical connection (3.125 Gbit/s).

Must allow for multi‐board Front-end card synchronization, slow control and data readout

FRONT-END CARD SYNCHRONIZATION

Clock Propagation ‐ Clock jitter = 20 ps (Typ.)

‐ Clock skew = fixed < 6.4 ns, depending on Timestamp reset and Run Start/Stop through:

‐ RJ45 SYNC IN/OUT (B/C lines) ‐ SYNC via software command sent to all the boards that need to be synchronized ‐ PPS, from GPS

REQUIRED COMMUNICATION INTERFACES

USB

USB3.0 connector, type C MAX Readout Rate: 300 MB/s (tested with iPerf) Ethernet

• Ethernet connector, type RJ‐45.

Supports 1 Gbps connection to the

PC

MAX Readout Rate: 80 MB/s.

• Optical connector, type SFP+.

10 Gbps connection to the PC MAX Readout Rate: 280 MB/s.

FIRMWARE Upgradable

SOFTWARE

Readout software vendor supplied (Windows or Linux)

POWER REQUIREMENTS

Single power supply: +12 V. Accepted voltage range: MIN +7 V, MAX +15 V

POWER CONSUMPTIONS

10W maximum