Mirion Technologies 2040 User manual

Model
2040
Coincidence Analyzer
9231715B
Manual Type

Copyright 2016, Mirion Technologies (Canberra), Inc .
All rights reserved.
The material in this document, including all information, pictures,
graphics and text, is the property of Mirion Technologies (Canberra),
Inc. and is protected by U.S. copyright laws and international copyright
conventions.
Mirion Technologies (Canberra) expressly grants the purchaser of this
product the right to copy any material in this document for the
purchaser’s own use, including as part of a submission to regulatory or
legal authorities pursuant to the purchaser’s legitimate business
needs.
No material in this document may be copied by any third party, or
used for any commercial purpose or for any use other than that
granted to the purchaser without the written permission of Mirion
Technologies (Canberra), Inc.
Mirion Technologies (Canberra), Inc., 800 Research Parkway,
Meriden, CT 06450
Tel: [phone] FAX: [phone] http://www.canberra.com/.
The information in this document describes the product as accurately
as possible, but is subject to change without notice.
Printed in the United States of America.
For technical assistance, call our Customer Service Hotline at 1-800-
255-6370 or email [e-mail].

Table of Contents
1. Introduction .................................................................................... 1
Coincidence Analyzer Operation....................................................................................................1
Applications....................................................................................................................................2
2. Controls and Connectors .............................................................. 3
Front and Rear Panels.....................................................................................................................3
3. Operations...................................................................................... 4
Setup...............................................................................................................................................4
Coincidence Checkout....................................................................................................................4
Anti-Coincidence............................................................................................................................7
4. Circuit Description......................................................................... 8
A. Specifications............................................................................... 13
Input..............................................................................................................................................13
Output...........................................................................................................................................13
Controls ........................................................................................................................................13
Performance..................................................................................................................................13
Connectors....................................................................................................................................13
Physical.........................................................................................................................................13
Environmental ..............................................................................................................................14
B. Installation Considerations ......................................................... 15
C. FCC Notice ................................................................................... 16
Model 2040 Coincidence Analyzer User's Manual - Not released – 9231715B i
i

Important Safety Considerations
Read Carefully
Indicates warning of mains or high voltage present at output labeled HV.
Risk of electrical shock if covers are removed.
Caution – risk of danger. Refer to documentation for detailed explanation of caution
symbol wherever marked.
Earth tree symbol: indicates the connection point for the primary earth (ground)
supply.
Product complies with appropriate current EU directives (Low Voltage & EMC).
Product complies with appropriate current FCC /UL /CSA 61010-1 directives
(Low Volatge & EMC).
Manufacturer’s Address
Mirion Technologies (Canberra), Inc.
800 Research Parkway
Meriden, CT 06450 USA
ii 2040 Coincidence Analyzer User's Manual - 9231715B

Coincidence Analyzer Operation
1. Introduction
Coincidence Analyzer Operation
The Canberra Model 2040 Coincidence Analyzer accepts up to four input signals
generated by energy analysis or time discrimination modules. In turn, it produces a
logic pulse output when all of the inputs enabled by front-panel switches occur
within the resolving time set by front-panel controls; that is, when the leading edges
of all selected input logic pulses occur within a time period equal to the “resolving
time” selected.
Two resolving time ranges are provided: 0.1 - 1.0 microsecond and 10 - 100
nanoseconds. The 0.1 to 1.0 microsecond range is typically used for energy
coincidence analysis; the 10 - 100 nanosecond range is used for timing or
simultaneous energy and timing coincidence experiments.
The input signals are positive NIM logic signals such as the +5 volt nominal pulses
0.5 microseconds wide from 2035A, 2036A, and 2037A Timing Single Channel
Analyzers. The pulse width is not' important since only the leading edge is used by
the 2040
Coincidence Analyzer to trigger the internal pulses. The positive or “slow” outputs
from the 1427 ARC Timing, the 1428 Constant Fraction Discriminator, and the 2055
LogicShaper and Delay may also be used as inputs to the 2040.
The 2040 output pulse is a NIM logic pulse, and is produced when all switch-selected
input conditions are met. For example, if A and B and ANTI inputs are IN, pulses
must be present at A and B and not at ANTI, with the leading edges of A and B
within the resolving time of the unit. A truth table for the various inputs is given in
the Truth table on page 7.
2040 Coincidence Analyzer User's Manual - 9231715B 1

Chapter 1Introduction
Applications
The inputs to the Model 2040 can be any standard NIM logic pulse such as produced
by SCAs. A coincidence set up with NaI detectors is shown in Figure 1. The unipolar
output pulse from the 2012 Amplifier is processed by a Model 2036A Constant
Fraction Timing SCA to produce a standard NIM logic pulse for the 2040
Coincidence
unit. In order to properly operate the system a delay curve is obtained in which
coincidences are measured as a function of relative delay between the two detectors.
The de- lay controls on each 2036A are used to set relative delay. In the ideal case of
no time jitter in either detector, the solid curve in Figure 2 is obtained. However, real
detectors will produce the dashed curve, and the minimum resolving time setting is
where there is a flat region (indicating all true coincidences are collected). The
proper relative de- lay is then the value for the center of the flat region.
A coincidence circuit in which the spectrum of one detector is collected in an MCA
gated by coincidence pulses from the 2040 is shown in Figure 3.The timing signals
are derived from Model 2037A Crossover Timing SCAs with bipolar pulses from the
2011 amplifiers. For Canberra ADCs operating in the late coincidence mode the
Model 2055 Logic Shaper and Delay may be omitted since only a trigger pulse is
required.
The 2040 may also be used in a slow coincidence mode in conjunction with a time-
to-amplitude converter such as the Model 2043 Time Analyzer shown in Figure
4. The 2040 coincidence would be used with the RANGE switch set to 0.1 - 1 μsec.
Care must be used in the arrangement shown to set the relative delays properly,
which is done by adjusting 2015A amplifier time constants, 2043 output delay, and
1457 de - lay amp time constants.
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Front and Rear Panels
2. Controls and Connectors
Front and Rear Panels
This is a brief description of the 2040’s front and rear panel connectors. For more
detailed information, refer to Appendix A, Specifications.
Resolving Time Control
This potentiometer selects resolving
times within the range set by the
RANGE switch.
Input Connector
Connectors A through C are used for
coincidence events. If all signals at these
connectors (enabled by the
corresponding input toggle switches)
occur within the resolving time set by
the RESOLVING TIME controls, an
output signal will occur at the OUTPUT
connector. The anti-coincidence input
(ANTI) is used to inhibit an output,
imposing a NAND condition.
Range Switch
This switch determines the resolving
time range within which the Model
2040 will operate. There are two
positions: 10 – 100 nanoseconds and
0.1 – 1.0 microseconds.
Output Connector
A positive 10 volt pulse with a rise time
less than 0.50 nanoseconds and a
duration of one microsecond is produced
when a coincidence (or anti-coincidence,
depending upon the connection made)
occurs among the enabled inputs to the
Model 2040.
Toggle Switch
These switches are used to select
those inputs which will be considered
for coincidence (or anti-coincidence)
experiment; all inputs not selected by
these switches are ignored; the
absence of any input pulse at an input
enabled by the toggle switch will
inhibit any output from the Model
2040 Coincidence Analyzer.
Figure 12040 Front Panel Controls and Connectors
Controls
2040 Coincidence Analyzer User's Manual - 9231715B 3

Chapter 3Operations
3. Operations
Since it is impossible to determine exactly how the user will operate his module in a
specific experiment, explicit instructions cannot be given. However, if the following
general procedures are performed, the user will become as familiar with the operation
of the module as is necessary.
Setup
1. Insert the Model 2040 Coincidence Analyzer module in an AEC compatible
bin such as the Canberra Model 2000.
2. For coincidence operation, connect input signals, which meet the conditions
detailed in the Inputs section of Appendix A, Specifications, to BNC
connectors A and B. (See also “Applications” on page X.).
3. Set toggle switches A and B to the IN position.
4. Set the toggle switches associated with input C and 'ANTI at their out
positions (down).
5. Connect the OUTPUT connector to an oscilloscope or to the input of a scaler
such as the Canberra Model•1772.Set the sensitivities of the oscilloscope to
5V/cm and 1 microsecond/cm, vertical and horizontal, respectively.
6. Set the RANGE switch to 0.1 – 1.0 microsecond; set the RESOLVING
TIME control to 10 (max.).
Coincidence Checkout
1. Activate the input signals and observe the OUTPUT signal on the
oscilloscope (or observe the scaler beginning to count). If an output cannot
be seen, using the oscilloscope check that the inputs are as specified in the
Inputs section of Appendix A, Specifications. An output signal will be
generated when the input signals occur within one microsecond of each
other.
2. Repeat step 1 with the following input signal combinations:
a. Input A and Input C.
b. Input B and Input Co c. Inputs A, B, and Co
Be sure that the IN switch is set for those inputs which are to be. Enabled
(and that they are off for those not enabled).
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Coincidence Checkout
3. Keeping the set up as in Step 2, reduce the RESOLVING TIME control
setting and note that the OUTPUT signal finally disappears.
4. Using two coincidence inputs (A and B, for example) delay one with respect
to the other. The following diagrams show how Canberra modules can be
used for this test:
Figure 2Use variable delay on one Model 2037A SCA
5. Check that an output is generated when the input signals occur within the
RESOLVING TIME set on the RESOLVING TIME control. Vary the delay
and RESOLVING TIME controls and check them at different settings. Refer
to Figure 4-2 for a typical linearity/accuracy curve of actual resolving time
vs. indicated time.
2040 Coincidence Analyzer User's Manual - 9231715B 5

Chapter 3Operations
6. Set all IN switches at their off position (down). Note that the OUTPUT
signal disappears.
Figure 4-2 Dial Resolving Time vs. Actual Resolving Time
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Anti-Coincidence
Anti-Coincidence
1. Supply a signal to the ANTI connector and one to the INPUT A connector.
2. Set the RESOLVING TIME control at 10.
3. Set the RANGE switch at 0.1 – 1.0 microsecond.
4. Set the A IN switch at IN.
5. Set the ANTI IN switch at IN.
6. Set all other switches at their off position (down).
7. Observe the OUTPUT. No output pulse will be generated if any input signals
on connectors A, B, or C occur in coincidence with the signal at the ANTI
connector.
8. Repeat Step 7 utilizing other coincidence inputs. The following truth table
will be obtained when operating the Model 2040 Coincidence Analyzer:
Input Signal
A B C ANTI OUTPUT
0 0 0 1 0
0
0
1
1
0
0 1 0 1 0
0 1 1 1 0
1 0 0 1 0
1 0 1 1 0
1 1 0 1 0
1 1 1 1 0
0
0
0
0
0
0 0 1 0 1
0 1 0 0 1
0 1 1 0 1
1 0 0 0 1
1 0 1 0 1
1 1 0 0 1
1
1
1
0
1
Note: It is assumed that a “0” input refers to the corresponding channel that is
switched “OUT”.
2040 Coincidence Analyzer User's Manual - 9231715B 7

Chapter 4Circuit Description
4. Circuit Description
The following is a description of the circuitry used in the 2040 Coincidence
Analyzer. A functional schematic and/or block diagram of the Model 2040 can be
ordered from Canberra.
Each input to the Model 2040 has a differentiator and a one-shot associated with it.
The differentiator detects the leading edge of the input pulse and generates a negative
spike to trigger the one-shot.
The ANTI input is disabled by holding the buffer transistor (Q13) on, so that an input
will not make a trigger spike. The three COINC inputs are disabled by turning off the
one-shot input transistor. This also makes the output of the one-shot high so that it
can be ANDed with enabled one-shots.
RESOLVING TIME is essentially the width of the one-shots. The last input must be
triggered before the first input one-shot times out. (See Timing Diagrams). When the
third triggered input one-shot goes high, this makes the input to the Schmitt Trigger
made up of Q20, Q2 I, and Q22 go high and give a TRIG X pulse.
TRIG X triggers the ENABLE ONE-SHOT (Q23, Q24) which in turn triggers the
OUTPUT ONE-SHOT (Q25, Q27) to generate an output.
However, if an ANTI input occurs within the resolving time, a TRIG Y will be
generated by Schmitt Trigger QI 7, QI8 and Q19. This triggers the DISABLE ONE-
SHOT (Q30, Q31) and holds the output of the ENABLE ONE-SHOT low to inhibit
an output.
Resolving time is varied by the RESOLVING TIME control and the RANGE switch
to control the time of each one-shot.
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Anti-Coincidence
2040 Coincidence Analyzer User's Manual - 9231715B 9

Chapter 4Circuit Description
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Anti-Coincidence
2040 Coincidence Analyzer User's Manual - 9231715B 11

Chapter 4Circuit Description
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Input
A. Specifications
Input
INPUTS – Accept positive 4-10 V pulses; rise time <40 ns; duration greater than 100
ns; Zin ≈ 2.2 kΩ shunted by 120 pF.
Output
OUTPUT – Positive 10 V pulse; rise time <50 ns; width; Zout = 50Ω; dc coupled.
Controls
RANGE – 10 to 100 ns or 0.1 to 1.0 μs, front panel switch selected.
RESOLVING TIME – 1 to 10 within selected RANGE; front panel ten-turn
potentiometer control.
CHANNEL SELECTION – Each channel can be enabled (IN) or disabled (OUT) for
coincidence evaluation using front panel switches. Input within selected
RESOLVING TIME must be present at each enabled channel for an output to be
generated.
Performance
RESOLVING TIME STABILITY – ≤5% of setting or 3 ns, whichever is larger.
Connectors
All signal connectors are front panel BNC type. POWER REQUIREMENTS
+24 V dc .-35 mA +12 V dc -170 mA
.24 V dc .-80 mA -12 V dc -12 mA
Physical
SIZE – Standard single-width NIM module 3.43 cm x 22.12 cm (1.35 x 8.71 in.) per
DOE/ER-0457T.
NET WEIGHT – 0.9 kg (2.0 lb). SHIPPING WEIGHT – 1.8 kg (4.0 lb).
2040 Coincidence Analyzer User's Manual - 9231715B 13

Environmental
OPERATING TEMPERATURE – 0 to 50 °C.
OPERATING HUMIDITY – 0 to 80% relative, non-condensing.
Meets the environmental conditions specified by EN 61010, Installation Category I,
Pollution Degree 2.
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Environmental
B. Installation Considerations
This unit complies with all applicable requirements. Compliance testing was
performed with application configurations commonly used for this device.
During design and assembly of the device, precautions were taken by the
manufacturer to minimize the effects of RFI and EMC on the system. However, care
should be taken to maintain full compliance. These considerations include:
•A rack or tabletop enclosure fully closed on all sides with rear door access.
•Single point external cable access.
•Blank panels to cover open front panel Bin area.
•Compliant grounding and safety precautions for any internal power
distribution.
•The use of NRTL/CE compliant accessories such as fans, UPS, etc.
Preventive Maintenance
This unit does not require any periodic cleaning maintenance.
Any maintenance should be performed by a qualified Mirion Technologies
(Canberra) service representative.
Operating Protection Impairment
Mirion Technologies (Canberra) is not liable for any operational malfunctions or
personal injuries due to mishandling or unauthorized repair and maintenance not
detailed in this manual.
Cleaning/Decontamination
When needed, the unit may be cleaned. Remove power from the unit before cleaning.
Use only a soft cloth dampened with warm water and do not allow water to enter the
unit. Make sure unit is fully dry before restoring power. Because of the ventilation
holes in the NIM wrap, do not use any liquids to clean the wrap, side, or rear panels.
2040 Coincidence Analyzer User's Manual - 9231715B 15

C. FCC Notice
The following paragraphs are notices required by Federal Communications
Commission (FCC) rules, Part 15, Subpart A.
“The user is cautioned that any changes or modifications not expressly approved
by the party responsible for compliance could void the user’s authority to operate
the equipment.”
This equipment has been tested and found to comply with the limits for
a class A digital Device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial
environment. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
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