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CAEN
Tools for Discovery
n
Rev. 4 - 14 April 2011
Electronic Instrumentation
User Manual UM3188
DT5790
Digital Pulse Analyzer
Rev. 0 - 10 July 2014
Purpose of this Manual
This User Manual contains the full description of the DT5790 Digital Pulse Analyzer.
Change Document Record
Date
10 July 2014
Revision
00 Initial release
Changes
Symbols, abbreviated terms and notation
ADC
CFD
DPP
DPP-PSD
PMT
SiPM
Analog to Digital Converter
Constant Fraction Discriminator
Digital Pulse Processing
DPP for Pulse Shape Discrimination
Photo Multiplier Tube
Silicon Photo Multiplier
Reference Documents
[RD1] GD2512 – CAENUpgrader QuickStart Guide
[RD2] UM2580 – Digital Pulse Shape Discriminator User Manual
[RD3] GD2783 – First Installation Guide to Desktop Digitizers & MCA
[RD4] GD2812 – DeskBoot QuickStart Guide
[RD5] GD2827 - How to make coincidences with CAEN digitizers
All documents can be downloaded at: http://www.caen.it/csite/LibrarySearch.jsp
CAEN S.p.A.
Via Vetraia, 11 55049 Viareggio (LU) - ITALY
Tel. +39.0584.388.398 Fax +39.0584.388.959 [email protected] www.caen.it
© CAEN SpA – 2014
Disclaimer
No part of this manual may be reproduced in any form or by any means, electronic, mechanical, recording, or otherwise, without the prior written permission of CAEN SpA.
The information contained herein has been carefully checked and is believed to be accurate; however, no responsibility is assumed for inaccuracies. CAEN SpA reserves the right to modify its products specifications without giving any notice; for up to date information please visit www.caen.it
.
MADE IN ITALY : We stress the fact that all the boards are made in Italy because in this globalized world, where getting the lowest possible price for products sometimes translates into poor pay and working conditions for the people who make them, at least you know that who made your board was reasonably paid and worked in a safe environment. (this obviously applies only to the boards marked "MADE IN ITALY", we cannot attest to the manufacturing process of "third party" boards).
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Electronic Instrumentation
Index
.............................................................................................. 9
................................................................................ 17
......................................................................................... 19
................................................................................................. 27
List of Figures
..............................................................................................19
....................................................................19
............................................................................................20
..............................................................................................20
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List of Tables
......................................................................6
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1 Introduction
The DT5790 is a complete digital acquisition PSD system for scintillators and other detectors. It is ideally suited for
Organic, Inorganic and Liquid Scintillators coupled to photodetectors like PMTs and SiPMs, whose pulses can be directly accepted by the board.
In a compact desktop form factor, the DT5790 houses:
250 MS/s 12-bit waveform digitizer with online Digital Pulse processing capability. Two single ended analog inputs on BNC connectors, 2 V pp
of input dynamics and adjustable DC offset via a 16-bit DAC on each channel in the full range.
2x ±4 kV 3 mA (4 W max.) bias outputs on SHV connectors. Channel polarity NEGATIVE, POSITIVE or MIXED
selectable by ordering options (Tab. 1.1).
2x ±12 V 100 mA and 2x ±24 V 50 mA PREAMP bias outputs through DB9 connectors for preamplifiers power supply.
The waveform digitizer operates upon the DPP-PSD firmware, developed for Charge Integration and Pulse Shape
Discrimination. DPP-PSD is based on an advanced online Digital Dual Gate Charge Integration allowing an effective data analysis even at high count rate. It performs input signal baseline calculation, self-triggering and double-gate charge integration with programmable parameters, double integration of both prompt and total charge for Pulse
Shape Discrimination and pedestal subtraction for energy calculation.
C and LabVIEW libraries with demos and examples for developers.
The DT5790 acquisition modes allows to:
Acquire waveforms, either input signals or the outputs of the internal digital filters, for monitoring and parameters tuning (Oscilloscope Mode).
Store parameters like charge and time stamp, extracted from the pulse (List Mode).
Store waveforms and parameters all at once (Mixed Mode, not managed by the provided DPP-PSD Control
Software).
According to the programmed mode, the relevant data can be available for the software to plot online the waveforms, or to build up charge and time histograms and PSD plots.
Thanks to the 2-input simultaneous acquisition, the DT5790 is able to manage coincidences and anti-coincidences 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. A CLK IN front panel connector is provided to synchronize the clocks from different boards, as well as digital I/Os can serve for trigger propagation and Start/Stop acquisition management.
The DT5790 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
DT5790 modules to a single Optical Link Controller (Mod. A2818/A3818).
The following list summarizes what can be done by the DT5790 at firmware level and by the relevant DPP-PSD Control
Software:
receive the signals directly coming from Organic, Inorganic and Liquid Scintillators coupled to photodetectors, like PMTs and SiPMs, and digitize them continuously at 250 MS/s;
Adapt the input pulses to the dynamic by the programmable DC Offset
calculate the baseline and subtract it from the input signal;
detect input pulses and generate a local trigger on them;
calculate the time of arrival of the trigger, perform a dual gate charge integration;
build an event, according to the readout mode, made of a configurable combination of Trigger Time Stamp,
Prompt Charge, Total Charge, or raw waveforms;
detect and reject pile-up events (not managed by the provided DPP-PSD Control Software);
as among channels of different boards through the external trigger and external modules;
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store events (waveforms or lists of charges and time stamp) into a memory buffer and manage the readout through the Optical Link or USB;
Apply an event suppression based on the PSD value in order to eliminate those events that are identified, for instance, as gammas while the acquisition is looking for neutrons only. This technique can significantly reduce the throughput rate in case of neutron detection in a very high rate gamma field;
Events can be read by the DPP-PSD Control Software, which allows to:
accumulate, plot and save the histograms (energy spectra associated to Total Charge parameter over 16k bins) from each channel;
visualize the PSD 2-D Scatter Plot from each channel;
generate output files (lists, histograms or waveforms) in a binary or ASCII format;
run the Oscilloscope Mode that plots the waveforms of the input signals as well as of the internal filters in order to adjust the parameters of the acquisition.
set and monitor the HV power supply of up to two detectors;
power up to two preamplifiers.
configure the inhibit logic for HV shut down as input from the amplifier.
Table of related items:
Board Model
DT5790P
DT5790N
DT5790M
Description
2 Ch. Digital Pulse Analyzer - Positive HV
2 Ch. Digital Pulse Analyzer - Negative HV
2 Ch. Digital Pulse Analyzer - Mixed HV
Product Code
WDT5790XMAAA
WDT5790XNAAA
WDT5790XPAAA
DPP Firmware
DPP-PSD
Accessory
A2818
A3818A
A3818B
A3818C
AI2730
AI2720
AI2705
AI2703
AY2730
AY2720
(*)
Description Product Code
Digital Pulse Processing for Pulse Height Analysis WFWDPPNGAA20
PCI Optical Link
PCIe 1 Optical Link
PCIe 2 Optical Link
PCIe 4 Optical Link
Description
Optical Fibre 30 m simplex
Optical Fibre 20 m simplex
Optical Fibre 5 m simplex
Optical Fibre 30 cm simplex
Optical Fibre 30 m duplex
Optical Fibre 20 m duplex
Product Code
WA2818XAAAAA
WA3818AXAAAA
WA3818BXAAAA
WA3818CXAAAA
WAI2730XAAAA
WAI2720XAAAA
WAI2705XAAAA
WAI2703XAAAA
WAY2730XAAAA
WAY2720XAAAA
AY2705 Optical Fibre 5 m duplex WAY2705XAAAA
Tab. 1.1: Compliance table of supported CAEN boards, accessories and DPP firmware
(*)
The DT5790 is delivered factory equipped with a licensed version of the DPP-PSD firmware.
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2 Technical Specifications
MECHANICAL
ENVIRONMENTAL
ANALOG INPUT
ADC
DIGITAL SIGNAL
PROCESSING
PREAMPLIFIER POWER
SUPPLY
HIGH VOLTAGE POWER
SUPPLY
OPERATING MODES
TRIGGER MODES
FRONT PANEL
DIGITAL I/O
Electronic Instrumentation
Dimensions
154 W x 50 H x 164 L mm³
(without connectors)
154 W x 50 H x 194 L mm³
(including connectors)
Weight
950 g
Operational Conditions
0 – 50°C Temperature Range - EMC compliant
Input Features
BNC connector
Single ended, DC coupled
Input range: 2 V pp
Impedance: 50 Ω
Positive and negative signals accepted
Bandwidth: DC to 125 MHz
Programmable DC offset adjustment on each input in the full scale range
Number of Inputs
2
Resolution
12 bits
Sampling Rate
250 MS/s(simultaneously on each input)
In put baseline calculation and subtraction
Manual trigger threshold adjustment
Dual gate charge integration
Pile-Up detection
Online PSD calculation
Configurable PSD threshold for Neutron-Gamma discrimination
Time Stamp: 4 ns resolution, 32 bit
Preamp Outputs
2
Preamp Features
DB9 connector
±12 V,100 mA output (DB9/pin4/pin9)
±24 V, 50 mA output (DB9/pin6/pin7)
Output voltage tolerance: 2%
Voltage ripple < 5 mV pp
Extra Features
Aux. analog input, 0 ÷ 10 V (DB9/pin3)
Ext. input for detector’s temperature readout (DB9/pin8)
HV Features
SHV connector
4 kV V set
, 3 mA I set
(4 W power limited)
HV polarity configurable by ordering option
V set
, V mon
resolution: 0.1 V
I set
,I mon
resolution: 0.05 µA
Voltage ripple: 3 mV pp
(Typ.), 5 mV pp
(Max.) @1kV/500µA
3 mV pp
(Typ.), 5 mV pp
(Max.) @2kV/1mA
10 mV pp
(Typ.), 15 mV pp
(Max.) @4kV/1mA
User configurable Ramp-Up/Ramp-Down rates independently for each channel: 1÷ 500 V/s range in steps of 1 V/s
User configurable HV parameters independently for each channel
HV Outputs
2
Safety Features
OverVoltage/UnderVoltage alarms
Overcurrent/OverTemperature alarms (Kill or Ramp selectable esc modes)
Channel Inhibit on DB9 and dedicated BNC connectors, configurable logic by panel switch
Pulse Shape Discrimination (PSD): histogram of Charge Long (16k) and 2-D scatter plot of PSD parameter (built at software level)
List mode: total charge, prompt charge and time stamp for each event
Oscilloscope mode: input and internal filters waveforms
Uncorrelated: each channel operates independently (based on channel self-trigger)
Correlated: coincidence/anticoincidence among channels and/or an external trigger (TRG-IN)
External: channels are triggered by external trigger only (TRG-IN)
CLK-IN (AMP Modu II)
AC coupled differential Input Clock:
LVDS, ECL, PECL, LVPECL, CML (single ended
GPO (LEMO)
General Purpose Output: NIM/ TTL, Z in
= 50 Ω
Can be used to propagate the global trigger in
NIM/TTL available by orderable cable);
Jitter<100ppm requested;
Can be used as external clock reference for single board or to synchronize the clocks of multiple boards, provided through a Fan In multi-board synchronization (in combination with TRG-IN), as output register or Run ON/OFF status
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COMMUNICATION
INTERFACE
TRG-IN (LEMO)
External Trigger Input: NIM/TTL, Z in
= 50 Ω
Can be used either to force the event acquisition from all the channels of the board, or to gate/veto the individual channel self-triggers, or in coincidence/anti-coincidence with the selftriggers, or to propagate the common trigger in multi-board synchronization (in combination with
GPO).
Optical Link
CAEN CONET proprietary protocol
Up to 80 MB/s transfer rate
Daisy chain capability: it is possible to connect up to 8 or 32 ADC modules to a single Optical Link
Controller (A2818 or A3818 respectively)
GPI (LEMO)
General Purpose Input: NIM/TTL, Z in
= 50 Ω
Can be used as SYNC/START in multi-board synchronization or Run ON/OFF Control
USB
USB 2.0 compliant
Up to 30 MB/s transfer rate
FIRMWARE
Firmware can be upgraded via USB/Optical Link
SOFTWARE
POWER REQUIREMENTS
Controlled by the DPP-PSD Control Software
For developers: general purpose C libraries with demo samples available
Operating Supply Voltage: +12 VDC ± 10%
Consumptions (@ +12 VDC): 3.2 A (Typ.) with maximum current charge on preamps outputs and 1 kV / 1 mA (1 W) charge on HV outputs; ± 10% tolerance.
Power supply unit (+12 VDC, 45 W) included in the kit
Tab. 2.1: DT5790 Specifications Table
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3 Packaging and Compliancy
The unit is a Desktop module housed in an alloy box (weight: 950 g) with the following dimension:
154 W x 50 H x 164 L mm³ (connectors encumbrance not included)
154 W x 50 H x 194 L mm³ (including connectors)
154 mm
164
mm
Fig. 3.1: DT5790 front view
194 mm
164 mm
9
Fig. 3.2: DT5790 side view
CAUTION:
to manage the product, consult the operating instructions provided.
A potential risk exists if the operating instructions are not followed!
CAEN provides the specific document “Precautions for Handling, Storage and
Installation”, available in the documentation tab of the product’s web page, that the user is mandatory to read before to operate with CAEN equipment.
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Electronic Instrumentation
4 Power Requirements
The module is powered by the external AC/DC stabilized power supply included in the delivered kit (12 VDC, 3.75 A, 45
W).
Tab. 4.1 reports the recommended supply voltage operating conditions and the current consumptions.
OPERATING SUPPLY
VOLTAGE
(nominal)
+12 VDC ± 10%
CONSUMPTIONS
(@ +12 VDC)
DT5781 3.2 A⁽
*
⁾ (Typ.) ± 10%
⁽*⁾ measured with maximum current charge on preamps outputs and 1 kV / 1 mA (1 W) charge on HV outputs
Tab. 4.1: Power requirements table
Note: Using a different power supply source, like battery or linear type, it is recommended the source to provide +12
VDC and at least 3.75 A (as for the provided power supply unit); the power jack is a 2.1 mm type, a suitable cable is the
RS 656-3816 type (or similar).
Fig. 4.1: AC/DC power supply provided with the DT5790 kit
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5 Panels Description
CAEN
Electronic Instrumentation
H V 0
L I NK
Fig. 5.1: DT5790 front panel view
PREA M P 1
H V 1 DET 0 DET 1
O
N
O
V
C
O
N
O
V
C
CLK I N GPO T RG IN GPI
T
T
L
N
IM
P
L
L
L
O
C
K
Y
P
L
L
B
R
P
S
U
N
T
R
G
D
R
D
Y
B
U
S
Y
PREA M P 0
H
I N H I B I T
H
L
H V
Fig. 5.2: DT5790 rear panel view
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Front Panel
ANALOG INPUT
FUNCTION
Input connectors receiving the analog signals from the detector.
ELECTRICAL SPECS
Input dynamics: 2 V
Input impedance (Z in
): 50 Ω.
MECHANICAL SPECS
Series: BNC connectors.
Type: R 141 557 000W.
Manufacturer: RADIALL.
HV OUTPUT
FUNCTION
Output connectors providing HV power supply to up to detectors.
ELECTRICAL SPECS
MECHANICAL SPECS
Series: SHV connectors.
Type: R 317 580.
Manufacturer: RADIALL.
HV LEDs (YELLOW/RED): LED ON lights up RED (in case of positive output) or YELLOW (in case of negative output) when the output is active; LED OVC lights up RED if the output goes in overcurrent.
POLARITY LABEL: POSITIVE (positive HV output); NEGATIVE (negative HV output).
EXTERNAL CLOCK IN
FUNCTION
Input for the external clock.
ELECTRICAL SPECS
Sign. type: differential (LVDS, ECL, PECL,
LVPECL, CML).
Coupling: AC.
Z diff
: 100 Ω.
MECHANICAL SPECS
Series: AMPMODU connectors.
Type: 3-102203-4 (3-pin).
Manufacturer: AMP Inc.
PINOUT
CLK IN LED (GREEN): indicates the external clock is enabled.
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GENERAL PURPOSE OUTPUT
FUNCTION
General purpose digital output. Can be used to propagate the trigger as well as the GPI signal to other boards connected in Daisy chain.
ELECTRICAL SPECS
Signal level: NIM or TTL.
Requires 50 Ω termination.
MECHANICAL SPECS
Series: 101 A 004 connectors.
Type: DLP 101 A 004-28.
Manufacturer: FISCHER.
Alternatively:
Type: EPL 00 250 NTN.
Manufacturer: LEMO.
EXTERNAL TRIGGER INPUT
FUNCTION
Input for the external trigger.
ELECTRICAL SPECS
Signal level: NIM or TTL.
Input impedance (Z i n
): 50 Ω.
MECHANICAL SPECS
Series: 101 A 004 connectors.
Type: DLP 101 A 004-28.
Manufacturer: FISCHER.
Alternatively:
Type: EPL 00 250 NTN.
Manufacturer: LEMO.
GENERAL PURPOSE INPUT
FUNCTION
General purpose digital input connector. Can be used to reset the time stamp or to start/stop the acquisition.
ELECTRICAL SPECS
Signal level: NIM or TTL.
Input impedance (Z in
): 50 Ω.
MECHANICAL SPECS
Series: 101 A 004 connectors.
Type: DLP 101 A 004-28.
Manufacturer: FISCHER.
Alternatively:
Type: EPL 00 250 NTN.
Manufacturer: LEMO.
OPTICAL LINK PORT
FUNCTION
Optical LINK connector for data readout and flow control. Daisy chainable. Compliant to
Multimode 62.5/125μm cable featuring LC connectors on both sides.
ELECTRICAL SPECS
Transfer rate: up to 80 MB/s.
MECHANICAL SPECS
Series: SFF Transceivers.
Type: FTLF8519F-2KNL (LC connectors).
Manufacturer: FINISAR.
PINOUT
LINK LEDs (GREEN/YELOW): right LED (GREEN) indicates the network presence, while left LED (YELLOW) signals the data transfer activity.
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USB PORT
FUNCTION
USB connector for data readout and flow control.
ELECTRICAL SPECS
Standard: compliant to USB 2.0 and USB 1.0.
Transfer rate: up to 30 MB/s.
MECHANICAL SPECS
Series: USB connectors.
Type: 787780-2 (B-Type).
Manufacturer: AMP Inc.
USB LINK LED (GREEN): indicates the USB communication is active.
DIAGNOSTICS LEDs
TTL (GREEN): indicates GPO, TRG IN, and GPI signals are TTL;
NIM (GREEN): indicates GPO, TRG IN, and GPI signals are NIM;
PLL LOCK (GREEN): indicates PLL is locked to the reference clock;
PLL BYPS (GREEN): indicates the PLL drives directly the ADCs. PLL circuit is switched off and PLL LOCK LED is turned off;
RUN (GREEN): indicates the acquisition is running (data taking). Please, refer
to the ACQUISITION_STATUS register description, Chapter 8 of [RD2]).
TRG (GREEN): indicates the trigger is accepted.
DRDY (GREEN): indicates the event/data is present in the Output Buffer.
BUSY (RED): indicates all the buffers are full for at least one channel.
HAZARD SYMBOLS
CAUTION: indicates the need to consult the operating instructions provided with the product.
A potential risk exists if the operating instructions are not followed
HIGH VOLTAGE: indicates the presence of electric shock hazards. Enclosures marked with these symbols should only be opened by CAEN authorized personnel.
To avoid risk of injury from electric shock, do not open this enclosure
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Rear Panel
PREAMPLIFIER I/Os
FUNCTION
I/O connectors for the preamplifiers power supply.
ELECTRICAL SPECS
MECHANICAL SPECS
Series: HD20 connectors.
Type: 5747150-2 (D-Sub, female, 9-pole) with clips 5552561-3.
Manufacturer: TYCO Electronics.
PINOUT
INHIBIT POLARITY SWITCH
FUNCTION
Slide switches for the HV output inhibit polarity setting.
ELECTRICAL SPECS
Active high level range: +2 V ÷ + 24 V.
Active low level range: -24 V ÷ -2 V.
MECHANICAL SPECS
Series: 1K2 slide switches.
Type: 090320102 (1 VIA).
Manufacturer: EAO International.
INHIBIT LED (RED): indicates the status of the inhibit logic. The LED lights up RED in case of inhibit condition.
INHIBIT INPUT
FUNCTION
BNC inputs receiving the HV output inhibit from the preamplifiers. Inhibit polarity can be selected through a dedicated switch in order to fit the preamplifier’s logic.
ELECTRICAL SPECS
MECHANICAL SPECS
Series: BNC connectors.
Type: R 141 557 000W.
Manufacturer: RADIALL
Not available.
Note: The HV channel inhibit input is duplicated on DB9 connectors (see PIN5 description of PREAMPLIFIER I/Os above).
SPARE LINK
FUNCTION
Auxiliary connector reserved for CAEN usage.
ELECTRICAL SPECS
Not available.
MECHANICAL SPECS
Series: Header connectors.
Type: 7610-5002-5+5.
Manufacturer: 3M.
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DC INPUT
FUNCTION
Input power supply (+12 VDC).
ELECTRICAL SPECS
MECHANICAL SPECS
Series: CC power supply connectors
Type: KLDX-0202-A-LT (DC power jack).
Manufacturer: KYCON
PINOUT
C
ON/OFF SWITCH
FUNCTION
Panel switch for module power supply
ON/OFF:
O → power supply OFF.
I → power supply ON.
ELECTRICAL SPECS
Not available.
MECHANICAL SPECS
Series: A1 switches.
Type: A11331122000 (Single pole two way)
Manufacturer: Molveno.
IDENTIFYING LABEL
FUNCTION
Board’s identifying label indicating:
the model;
the serial number (S/N);
the symbol of the CE conformity marking.
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6 Detector & PREAMP Power Supply
Detector Power Supply
17
Fig. 6.1: HV output component
The Digital Pulse Analyzer houses High Voltage (HV) Power Supply outputs (4 kV, 3 m
A, limited to 4 W) to power supply
mixed polarity (see Tab. 1.1). HV outputs are delivered through SHV connectors.
The HV output RAMP-UP and RAMP-DOWN rates may be selected independently for each channel in the 1÷ 500 V/s
range in steps of 1 V/s. Other HV specifications are detailed in § 2.
Note: HV channels parameters can be configured and monitored through the CAEN DPP-PSD Control Software(see §
DETECTOR POWER SUPPLY INHIBIT
Inhibit signal coming from the detector is accepted as input on the DB9 preamp connector and duplicated on a
safe operating temperature. The polarity can be High or Low, hardware selectable through an external switch:
Positive Polarity (H): the enabling condition is an open circuit or active high (+2 V ÷ + 24 V); inhibit condition is ground or active low (-24 V ÷ -2 V).
Negative Polarity (L): the enabling condition is ground or active low (-24 V ÷ -2 V); inhibit condition is an open circuit or active high (+2 V ÷ + 24 V).
When the inhibit condition is detected, the related HV output is switched off roughly (KILL) or stepwise (RAMP).
ADDITIONAL FEATURES
The HV output electronics provides additional safety features like OverVoltage and UnderVoltage warning when the output voltage differs from the programmed value by more than 1% of the full scale nominal value (i.e. 40V), as well as protection features which cause the switching off of the detector power supply roughly (KILL) or stepwise (RAMP) in event of HV output’s OverCurrent or OverTemperature detection if a HV output tries to draw a current larger than its programmed limit or its temperature is over the safety limit.
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PREAMP Power Supply
DT5790 is equipped with 2 Low Voltage Power Supply outputs for preamplifiers, providing: ±12 V / 100 mA or ±24 V /
50 mA on DB9 female connectors. Detailed technical specifications are reported in Tab. 2.1.
Fig. 6.2: DB9 connector pinout
PINOUT DESCRIPTION:
PIN1-2: ground.
PIN3: spare external analog input with 0 ÷ 10 V dynamics.
PIN4: +12 V / 100 mA power supply output.
PIN5: HV channel external inhibit input. Inhibit polarity can be selected through a dedicated switch in order to fit the preamplifier’s logic (see the description of INHIBIT POLARITY SWITCH above).
Note: The HV channel inhibit input is duplicated on dedicated BNC connectors.
PIN6: -24 V / 50 mA power supply output.
PIN7: +24 V / 50 mA power supply output.
PIN8: external input for detector’s temperature readout from a PT100 or PT1000 sensor model (not managed by the
DPP-PSD Control Software).
PIN9: -12 V / 100 mA power supply output
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7 Notes on Digitizer Operating
The DT5790 Digital Pulse Analyzer operates on the analog signals provided on its 2 inputs the same as a CAEN DT5720 digitizer equipped with a DPP-PSD Firmware for the Digital Pulse Shape Discrimination. x2
SSRAM
INPUT i
DAC
x1
ADC
12bit @
250MS/s
CHANNEL
FPGA
(AMC)
8 8
CLK-IN
OSC
50MHz
PLL
SCLK
TRGCLK
TRG IN
GPO
GPI
INTERFACE
FPGA
(ROC)
CONET
USB
19
Fig. 7.1: Simplified block diagram of the digitizer block in the DT5790
The DT5790 is an acquisition system that receives the analog signal and performs the A/D conversion (@250 MS/s, 12 bit) at the input of the module, just after an analog input stage whose purpose is to adapt the signal voltage swing to the dynamic range of the ADC. After the A/D conversion, the stream of samples is managed by an FPGA programmed to perform on-line Digital Pulse Processing in order to implement the Digital Pulse Analyzer based on the Pulse Shape
Discrimination (DPP-PSD); the algorithms implemented in the DPP-PSD firmware are based on the dual gate charge integration for the calculation of the PSD parameter used for the gamma-neutron discrimination.
PU REJECT
PUR n/
γ REJECT
PSD
THRESHOLD
PULSE SHAPE
DISCRIMINATOR
VME
INPUT
ADC
DELAY
CHARGE
ACCUMULATOR
BASELINE
+
TRIGGER
THRESHOLD
_
SHORT
GATE
LONG
GATE
DISCR
TRIGGER
WAVEFORM
Q-TOTAL
Q-FAST
CLOCK
COUNTER
TIME STAMP
EVENT
BUILDER
OUT
DATA
TRG
VALIDATION
READOUT
INTERFACE
USB
CONET
AMC FPGA
TRG_CH0
COINCIDENCE
LOGIC
EXT I/Os
TRG_CHn
MEMORY
BUFFERS
Fig. 7.2: Block Diagram of the processing chain programmed into the digitizer’s FPGA
Refer to [RD2] for a detailed description of:
Principle of operation of the DPP-PSD Firmware
Acquisition modes supported at firmware level and DPP Control Software description
Memory organization and data format
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8 Drivers & Libraries
In order to interface with the DT5790, CAEN provides the drivers for all the different types of physical communication channels featured by the DT5790 and compliant with Windows and Linux OS, as well as a set of C libraries.
Drivers
COMM LINKS OS OS VERSION
XP / Vista / 7
(32 and 64-bit)
USB / OPT LINK kernel Rel. 2.4 / 2.6 / 3.6 / 3.10 / 3.11⁽*⁾
⁽*⁾ Please, refer to the product web page (Board and Bridge) for the specific kernel support
Tab. 8.1: Drivers info table
Drivers USB 2.0 compliant. Drivers updates are downloadable on CAEN website (www.caen.it) in the
“Software/Firmware” tab at the DT5790 web page (login required):
Home / Products / Spectroscopy Solutions / Digital Systems for Charge Integration / Systems for Charge Integration / DT5790
Fig. 8.1: Typical view of the drivers download at the DT5790 web page
Note: For Microsoft Windows OSs, the USB drivers installation is detailed in [RD3].
Drivers Optical Link CONET 2 compliant. This drivers are managed by the A2818 PCI card or the A3818 PCIe card. Drivers updates are downloadable on CAEN website (www.caen.it) in the “Software/Firmware” tab at the A2818 or A3818 web page (login required):
Home / Products / Modular Pulse Processing Electronics / PCI/PCIe / <Controller>
Fig. 8.2: Typical view of the drivers download at the A3818 web page.
Note: For the installation of the Optical Link drivers, refer to the User Manual of the specific Controller.
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Libraries
CAEN provides a set of libraries required by its DPP-PHA software tools, which are also the basis for users who want to develop their own software.
CAENVMELib is a set of ANSI C functions which permit a user program to use and configure the CAEN Bridges and Controllers V1718/VX1718 (VME-USB2.0 Bridge), V2718/VX2718 (VME-PCI/PCIe Optical Link Bridge),
A2818/A3818 (PCI/PCIe-CONET Controller).
CAENComm library manages the communication at low level (read and write access). The purpose of the
CAENComm is to implement a common interface to the higher software layers, masking the details of the physical channel and its protocol, thus making the libraries and applications that rely on the CAENComm independent from the physical layer. Moreover, the CAENComm is based in turn on CAENVMElib and it requires the CAENVMELib library (access to the VME bus) even in the cases where the VME is not used.
CAENDigitizer is a library of functions designed specifically for the Digitizer family and it supports also the boards running the DPP firmware, as it happens in the DPHA. The CAENDigitizer library is based on the
CAENComm which is based on CAENVMELib, as said above.
As far as the DT5790 is concerned, the supported communication channels are the following:
PC → USB → DT5790
PC → PCI (A2818) → CONET → DT5790
PC → PCIe (A3818) → CONET → DT5790
DPP-PSD Control Software
User’s SW for PSD
CAENDigitizer Library
CAENComm Library
A2818 driver A3818 driver USB driver
USB 2.0
A2818 A3818
DT5790
CONET2 (Optical Link)
Fig. 8.3: Hardware and software layers scheme
(www.caen.it) in the “Download” tab at the library web page:
Home / Products / Firmware/Software / Digitizer Software / Software Libraries / <Library>
Install in the order: CAENVMELib → CAENComm library → CAENDigitizer library.
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9 Software Tools
CAEN provides software tools to interface the DT5790, which are available for free download on www.caen.it at:
Home / Products / Firmware/Software / Digitizer Software
DPP-PSD Control Software
The DT5790 can be controlled through the DPP-PSD Control Software, a software interface for configuration, acquisition, data plotting. It allows the user to set the parameters for the acquisition, to configure the DPP and the HV parameters, to perform the data readout and the HV monitoring, the histogram collection and the spectrum or waveform plotting and saving. The program doesn’t feature data analysis, but can be easily interfaced to software tools for offline analysis.
Fig. 9.1: DPP-PSD Control Software: Top – DPP settings Tab and typical
60
Co Total Charge Spectrum; Bottom - PSD 2-D Scatter
Plot
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Fig. 9.2: HV management tab
DPP-PSD Control Software is available both for Windows and Linux platforms. The installation package can be downloaded on CAEN web site (www.caen.it) at:
Home / Products / Firmware/Software / Digitizer Software / Readout Software
The reference document for installation instructions and program detailed description is [RD2].
Note: Windows version of DPP-PSD Control Software is stand-alone (the required libraries are installed locally with the program; only the communication driver must be installed apart by the user), while the version for Linux needs the required libraries to be already installed apart.
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CAENUpgrader
•
•
CAENUpgrader is a free software composed of command line tools together with a Java Graphical User Interface.
Specifically for the DT5790, CAENUpgrader allows in few easy steps to:
Upload different versions of the Readout and HV firmware on the board
Read the Readout or HV firmware release of the board and the PCI or PCIe controller eventually used with
•
•
Upgrade the internal PLL (firmware file that can only be provided on demand by CAEN)
Get the Board Info file, useful in case of support
• Force the board to reboot loading the Standard or Backup copy of the firmware stored on-board
CAENUpgrader can operate with Windows and Linux, 32 and 64-bit operating systems.
third-party Java SE6 (or later).
Fig. 9.3: CAENUpgrader Graphical User Interface
CAENUpgrader installation package can be downloaded on CAEN web site (www.caen.it) at:
Home / Products / Firmware/Software / Digitizer Software / Configuration Tools
The reference document for installation instructions and program detailed description is [RD1]
Note: Windows version of CAENUpgrader is stand-alone (the required libraries are installed locally with the program), while the version for Linux needs the required libraries to be already installed apart by the user.
Note: DT5790 model is supported by CAENUpgrader software release 1.5 or higher.
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CAENComm Demo
CAENComm Demo is a simple program developed in C/C++ source code and provided both with Java and LabVIEW GUI interface. The demo mainly allows for a full board configuration at low level by direct read/write access to the registers and may be used as a debug instrument.
Fig. 9.4: CAENComm Demo Java and LabVIEW graphical interface
CAENComm Demo can operate with Windows OSs, 32 and 64-bit. It requires CAENComm and CAEVMElib libraries as
additional software to be installed (see § 8).
The Demo is included in the CAENComm library installation Windows package, which can be downloaded on CAEN web site (login required) at:
Home / Products / Firmware/Software / Digitizer Software / Software Libraries / CAENComm Library
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10 HW Installation
Power ON Sequence
To power ON the board, follow this procedure:
1. connect the 12V DC power supply to the DT5790 through the DC input rear connector;
2. power up the DT5790 through the ON/OFF rear switch
See § 5 to identify the relevant components
Power ON Status
At Power-ON, the module is in the following status:
the Output Buffer is cleared; registers are set to their default configuration
Fig. 10.1: Front panel LEDs status at power ON
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11 Firmware and Upgrades
The DT5790 is delivered factory equipped with a licensed DPP-PSD Firmware. This means that no license needs to be bought apart by the user when purchasing a DT5790.
Firmware updates are available for download on CAEN website (www.caen.it) in the “Software/Firmware” tab at the
DT5790 web page (login required):
Home / Products / Spectroscopy Solutions / Digital Systems for Charge Integration / Systems for Charge Integration / DT5790
The board hosts one FPGA on the mainboard and one FPGA on the mezzanine. The channel FPGAs firmware is identical. A unique file is provided that will updated all the FPGAs at the same time.
ROC FPGA MAINBOARD FPGA (Readout Controller + VME interface):
FPGA Altera Cyclone EP1C20.
AMC FPGA CHANNEL FPGA (ADC readout/Memory Controller):
FPGA Altera Cyclone EP1C20
The firmware is stored onto on-board FLASH memory. Two copies of the firmware are stored in two different pages of the FLASH, called Standard (STD) and Backup (BKP); at power on, a microcontroller reads the FLASH memory and programs the module with the firmware version that is the STD one by default.
It is possible to upgrade the board firmware via USB or Optical Link by writing the FLASH with the CAENUpgrader
IT IS STRONGLY SUGGESTED TO UPGRADE ONLY ONE OF THE STORED FIRMWARE REVISIONS (GENERALLY THE STD
ONE): IF BOTH REVISION ARE SIMULTANEOUSLY UPDATED AND A FAILURE OCCURS, IT WILL NOT BE POSSIBLE TO
UPLOAD THE FIRMWARE VIA USB OR OPTICAL LINK AGAIN AND THE BOARD MUST BE SENT TO CAEN IN REPAIR!
In case of failures while programming the STD page of the FLASH, which compromise the communication with the
DT5790, the user can perform the following recovering procedure as first attempt:
-Force the board to reboot loading the copy of the firmware stored on the BKP page of the FLASH. For this purpose,
The DeskBoot CAEN utility can be used (available for download on CAEN website) or the Reboot option in
don’t work with optical link).
- Without power-cycling the board, use CAENUpgrader to read the firmware revision (in this case the one of the BKP copy). If this succeeds, it is possible now to communicate again with the board.
- Use CAENupgrader to load again the firmware on the STD page, then power-cycle in order the board to get operative again.
procedure fails, the board needs to be sent back to CAEN in repair (see § 12).
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Firmware File Description
The programming file, that has the extension .cfa (CAEN Firmware Archive), is a sort of archive format file aggregating all the DPP firmware files compatible with the same family of digitizers.
The firmware file name follows this general scheme: x720_x790_DPP-PSD_rev_X.Y_131.Z.CFA where:
x720_x790 are all the boards the file is compliant to.
DPP-PSD is the specific digital algorithm implemented into the firmware.
X.Y is the major/minor revision number of the mainboard FPGA.
131.Z is the major/minor revision number of the channel FPGA. Note that the major revision number (131) is fixed for the specific DPP algorithm (PSD).
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12 Technical Support
CAEN
Electronic Instrumentation
CAEN makes available the technical support of its specialists at the e-mail addresses below
:
[email protected]
(for questions about
the hardware)
[email protected]
(for questions about software
and libraries)
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UM3188 – DT5790 Digital Pulse Analyzer User Manual rev. 0
CAEN
Tools for Discovery
n
Electronic Instrumentation
CAEN SpA is acknowledged as the only company in the world providing a complete range of High/Low Voltage Power
Supply systems and Front-End/Data Acquisition modules which meet IEEE Standards for Nuclear and Particle Physics.
Extensive Research and Development capabilities have allowed CAEN SpA to play an important, long term role in this field.
Our activities have always been at the forefront of technology, thanks to years of intensive collaborations with the most important Research Centres of the world. Our products appeal to a wide range of customers including engineers, scientists and technical professionals who all trust them to help achieve their goals faster and more effectively.
CAEN S.p.A.
CAEN GmbH
Klingenstraße 108
CAEN
Tools for Discovery
UM3188 - DT5790 User Manual rev. 0 - 10 July 2014
Via Vetraia, 11
55049 Viareggio
Italy
Tel. +39.0584.388.398
Fax +39.0584.388.959 [email protected] www.caen.it
D-42651 Solingen
Germany
Phone +49 (0)212 254 4077
Fax +49 (0)212 25 44079
Mobile +49 (0)151 16 548 484 [email protected] www.caen-de.com
Electronic Instrumentation
CAEN Technologies, Inc.
1140 Bay Street - Suite 2 C
Staten Island, NY 10305
USA
Tel. +1.718.981.0401
Fax +1.718.556.9185 [email protected] www.caentechnologies.com
00100-13-XX790-MUTX
Copyright © CAEN SpA. All rights reserved. Information in this publication supersedes all earlier versions. Specifications subject to change without notice.
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