Mirion Technologies 9641 User manual
Model 9641
ICB HV Power Supply
6231711C
User’s Manual
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: 203-238-2351 FAX: 203-235-1347 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 techsupport@canberra.com.
Table of Contents
1. Introduction .................................................................................... 1
2. Controls and Connectors .............................................................. 2
Front Panel......................................................................................................................................2
Rear Panel.......................................................................................................................................3
Internal Controls.............................................................................................................................4
3. Operation........................................................................................ 5
Installation......................................................................................................................................5
Internal Controls.............................................................................................................................5
Programmable Controls..................................................................................................................6
Setup...............................................................................................................................................7
Connectors......................................................................................................................................7
4. Circuit Description......................................................................... 9
A. Specifications............................................................................... 10
Inputs............................................................................................................................................10
Outputs .........................................................................................................................................10
Manual Controls...........................................................................................................................10
ICB Programmable Controls........................................................................................................10
Front Panel Indicators...................................................................................................................11
Performance..................................................................................................................................11
Connectors....................................................................................................................................11
ICB Programming Summary........................................................................................................12
Power Requirements.....................................................................................................................12
Physical.........................................................................................................................................13
Environmental ..............................................................................................................................13
Cables...........................................................................................................................................13
B. Rear Panel Connectors................................................................ 14
HV Output ....................................................................................................................................14
10 Output......................................................................................................................................14
Inhibit ...........................................................................................................................................14
ICB Interface Connector...............................................................................................................14
9641 ICB HV Power Supply User’s Manual – 9231711C i
C. Setup Diagram ..............................................................................16
D. Installation Considerations..........................................................17
E. FCC Notice ....................................................................................18
ii 9641 ICB HV Power Supply User’s Manual – 9231711C
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 Voltage & EMC).
Manufacturer’s Address
Mirion Technologies (Canberra), Inc.
800 Research Parkway
Meriden, CT 06450 USA
9641 ICB HV Power Supply User’s Manual – 9231711C iii
Notes
iv 9641 ICB HV Power Supply User’s Manual – 9231711C
1. Introduction
The Canberra Model 9641 High Voltage Power Supply is a single-width NIM family
member of the ICB line of programmable front end electronics and has been
designed primarily for use with photomultiplier and electron multiplier tubes. By
design, the 9641 will accommodate any detector requiring a bias voltage up to 2000
V and a current level of 1 mA or less.
The 9641 allows the user to select from two outputs, one ranging from ±15 to ±2000
V dc and the other derived from the first but attenuated by a factor of 10 giving ±1.5
to ±200 V dc. A 20 segment bar graph displays the output voltage. In addition, this
unit allows the user to select the output voltage polarity with an internal control.
The 9641 can withstand any overload or short circuit for an indefinite period of time.
The unit can be programmed to either resume normal operations after removal of the
fault or to require a programmed reset command.
An INHIBIT input is available for remote shutdown of the 9641. The unit can be
programmed to either resume operation upon removal of the INHIBIT signal or to
require a programmed reset command.
The 9641 accepts programming information over an 8-bit wide Canberra bus
standard called the Instrument Control Bus (ICB). ICB NIMs connect to this bus via
a host module such as the Model 556 Acquisition Interface Module (AIM) as part of
a hierarchy of networked acquisition and control managed by a Genie family
computing platform.
Adjustments are made via the Graphical User Interface of the Genie software
environments. Equivalent batch procedure commands are also available in the
environments. All ICB NIM parameters are stored in the single data file structure of
the Genie family, allowing verification of correct setup from one experiment to the
next.
All ICB NIMs feature a characteristic bi-color READY LED to indicate operational
status.
9641 ICB HV Power Supply User’s Manual – 9231711C 1
Installation
3. Operation
This chapter discusses the use of the Model 9641's controls and functions. The
controls are programmable unless otherwise noted. For proper operation, an ICB
master, such as a Model 556 AIM module, and appropriate software, such as Genie-
PC, are required. For details on programming the 9641's controls, please refer to the
software manual. The Model 9601 AIM/ICB Setup Manual gives complete
instructions for setting up an ICB hardware system.
The 9641 is factory set for positive output polarity. If negative polarity is required,
change the internal polarity board before installing the unit in the NIM bin (refer to
Polarity Selection on page 6).
Installation
The Canberra Model 2100 Bin and Power Supply, or other bin and power supply
systems conforming to the mechanical and electrical standards set by DOE/ER-
00457T will accommodate the Model 9641. The 9641's right side-cover acts as a
guide for insertion of the instrument. The module is secured by turning the two front
panel captive screws clockwise until finger tight. It is recommended that the NIM bin
power switch be OFF whenever the module is installed or removed. To ensure safety,
be sure to use a NIM Bin which complies with all applicable safety requirements.
The Model 9641 can be operated where the ambient air temperature is between 0 °C
and +50 °C (+120 °F maximum). Perforations in the top and bottom sides permit
cooling air to circulate through the module. When relay rack mounted along with
other heat generating equipment, adequate clearance should be provided to allow for
sufficient air flow through both the perforated top and bottom covers of the NIM bin.
Internal Controls
Before removing the unit from the NIM bin, set the VOLTAGE control to 0.00 volts
and the HV to OFF.
WARNING:
The Model 9641 generates hazardous high
voltage, which may be present for up to one minute
after power is removed from the unit.
Avoid the risk of injury. Do not remove covers for at
least one minute after power has been removed
from the unit.
9641 ICB HV Power Supply User’s Manual – 9231711C 5
Chapter 3Operation
Polarity Selection
Output polarity can be changed by removing the unit's left side cover and changing
the polarity selector board's location. The board is symmetrical by design. Polarity is
not affected by orientation. When the unit's NIM bin power is turned on, the front
panel POLARITY preview LEDs will indicate the current polarity selection. Mirion
Technologies (Canberra) recommends that the polarity selection be verified before
turning on the unit 's NIM bin power. Factory set to POSitive.
WARNING: Do not operate the unit without side covers. Always
replace the covers immediately after setting the
polarity.
ICB Address Selection
The 9641's ICB address is set using a 16-position PC mounted rotary switch. This
switch is accessed through a hole in the left side cover. Using a small screwdriver, set
the address to a value of 0-F but unique from other modules connected to the
Instrument Control Bus (ICB).
Programmable Controls
A majority of the 9641's controls are programmable. For proper operation, an ICB
Master and software (AIM and Genie 2000 for example) are required. Please refer to
the software manual for details on controlling the 9641.
Inhibit Control
The Inhibit Function, which is independent of the Voltage Control 's setting, allows
the output voltage to be conditionally turned off or latched off by grounding or by
applying a logic 0 (≤0.7 V) to the rear panel INHIBIT connector. The front panel
INHIBIT STATUS indicator lights when the output has been inhibited.
The programmable INHIBIT input is compatible with all Canberra preamps for either
selection in the software setup menu; it isn't necessary to select the signal range to
match the HV INHIBIT logic high level of the associated Canberra preamp.
The software selection is provided for compatibility with INHIBIT signals from
instruments made by other manufacturers. Selecting 5V sets the pull up/clamp level
to +5 volts. Selecting 12V sets the pull up/clamp level to +12 volts. Please consult
the manual provided with your instrument for its requirements.
The 9641 can also be programmed for the Latched Inhibit Mode or the Conditional
Inhibit Mode.
In the Latched Mode, a reset is required when a logic 1 or open circuit is present at
the INHIBIT connector to restore the output voltage. The reset is generated by way
of the software platform. In the Conditional Mode, an INHIBIT input of ≥2 V or an
open circuit enables the output.
6 9641 ICB HV Power Supply User’s Manual – 9231711C
Setup
Automatic Overload Shutdown
One of the 9641's circuits monitors the output load current and automatically disables
the outputs for an overload or a fault condition.
A short duration arc-over or turn-on charging transient will not cause shutdown. The
front panel OVERLOAD STATUS indicator lights when the unit has been shut
down.
The unit can be programmed to either automatically resume operation when the fault
is removed or to require a manual reset by way of the software platform.
High Voltage Output
The High Voltage setting is programmable. It can be controlled to 1 part in 1024:
1.95 V (0.195 on the ÷10 output). Enabling and disabling of the HV output is also
programmable. When the HV is enabled, the front panel HV ON indicator will be
illuminated.
Setup
After setting the internal controls, install the Model 9641 in the NIM bin. Connect
the load to the appropriate rear panel SHV connector, and connect the ICB connector
to the ICB Master. Set the NIM bin power to ON; the appropriate polarity LED
should light, indicating the polarity selected.
Using the appropriate software, set the HV to ON and the VOLTAGE control to the
desired setting. The front panel bar graph will display the HV OUTPUT voltage in
kilovolts (kV).
Connectors
The 9641 has four connectors on the rear panel: HV Output and ÷10 Output, Inhibit,
and ICB.
HV Output and 10 Output
The 9641 has two rear panel output SHV connectors: HV OUTPUT and ÷10
OUTPUT. Mirion Technologies (Canberra) recommends that only one of these
outputs be used at a time.
For detectors operating at relatively low bias voltages and requiring little current, the
÷10 output should be used. This output is provided by means of a simple voltage
divider network, which has an impedance of 20 megohms. Therefore, loading effects
have to be taken into account if there is a significant current drain.
9641 ICB HV Power Supply User’s Manual – 9231711C 7
Chapter 3Operation
The advantage of the ÷10 output is that the zero offset and the control are better by a
factor of 10 over that of the HV OUTPUT. Most detectors (for example, Canberra
PIPS detectors, Si(Li) detectors, and Low Energy (LEGe) detectors), take very little
current and are thus compatible with the ÷10 output. The ÷10 output should never be
used with scintillation detectors which draw relatively large currents.
Inhibit Connector
This input allows an external control signal to enable/disable the HV output. A logic
low will disable the output.
ICB Connector
This connector provides bidirectional data to, and accepts control signals from, the
ICB Master. Control of the 9641 is via this port.
8 9641 ICB HV Power Supply User’s Manual – 9231711C
4. Circuit Description
A functional schematic of the Model 9641 can be ordered from Canberra. The high
voltage module is basically a dc to dc converter which converts low voltage dc power
to a high voltage dc output. This output voltage is highly regulated and filtered, and
can be varied by programming the control DAC. The input to the high voltage dc to
dc converter is obtained from a conventional NIM power supply and uses ±12 V dc
and ±24 V dc. The +5 V for the internal logic is derived from the +6 V NIM Supply.
An oscillator determines a high frequency (≈37 kHz) at which all amplification, high
voltage transformation, rectification, and filtering occurs. The amplification is a
function of a control voltage which performs the functions of control and regulation.
A sample of the output voltage is compared with a reference voltage in the sensing
circuit. The sensing circuit generates the control voltage to set and maintain a fixed
high voltage output.
9641 ICB HV Power Supply User’s Manual – 9231711C 9
Appendix ASpecifications
A. Specifications
Inputs
INHIBIT – Logic low or ground inhibits the HV outputs; max logic low ≤0.7 V;
logic high ≥2.0 V or open circuit enables.
ICB – Provides for connection to the Instrument Control Bus. Control of the Model
9641 is through this interface.
Outputs
HV OUTPUT – ±15 to ±2000 V dc, programmable in 1.95 V increments; 1 mA
output current capability; rear panel SHV connector.
÷10 OUTPUT – ±1.5 to ±200 V dc, programmable in 0.195 V increments; output
impedance 20 MΩ; rear panel SHV connector.
ICB - Provides feedback on the 9641's status: Inhibit, Overload, Polarity, ON/OFF
and HV setting.
Manual Controls
ADDRESS – Rotary switch selects 1 of 16 unique ICB Addresses; accessible
through opening in the side cover.
POLARITY – Internal programming plug sets output polarity.
ICB Programmable Controls
ON-OFF – Enable or disable the HV Output.
HV RESET – Restores normal operation following a latched Inhibit and/or Overload
Fault condition.
VOLTAGE – Programmable in increments of 1.95 V (0.195 V for the ÷10 output).
MODE CONTROL – Selects latched or non-latched modes for the Inhibit and/or
Overload conditions.
10 9641 ICB HV Power Supply User’s Manual – 9231711C
Front Panel Indicators
Front Panel Indicators
READY – Bi-color LED; green when on-line; yellow for fault or error; off when the
module is waiting for the computer to recognize it.
HV OUTPUT – 20 segment Bar graph, 0-2 kV.
POLARITY – Front panel LEDs indicate polarity continuously.
INHIBIT – LED to indicate Inhibit status.
OVERLOAD – LED to indicate Overload status.
Performance
RIPPLE AND NOISE – ≤3 mV peak to peak at 1 mA.
OUTPUT STABILITY – Long term drift of output voltage is ≤0.01%/hr. and
≤0.02%/8 hr. at constant input line voltage, load, and ambient temperature after a 30
minute warmup.
TEMPERATURE COEFFICIENT – ≤±40ppm/°C after 30 minute warmup, operating
range 0 to 50 °C.
REGULATION – ≤0.001% variation in output voltage over the load range and
≤0.001% for ±0.1% input voltage change within the operating range at constant
ambient temperature.
OVERLOAD PROTECTION – Power supply will withstand any overload, including
a short circuit for an indefinite period.
CURRENT LIMIT – 1.3 mA maximum.
RESOLUTION – 1.95 V increments (0.195 V for the ÷10 output).
Connectors
HV OUTPUT – Rear panel SHV
÷10 OUTPUT - Rear panel SHV
INHIBIT – Rear panel BNC
ICB – Rear panel, 20-pin ribbon header.
9641 ICB HV Power Supply User’s Manual – 9231711C 11
Appendix ASpecifications
ICB Programming Summary
Setup Parameters Read Write
Output Voltage X X
Voltage Polarity X
Inhibit Logic Levels X X
Latch Inhibit Mode
X
X
Latch Overload Mode X X
Module Status
ICB Address
X
Model Number X
Factory Serial Number X
Hardware Fault X
Inhibit Condition X
Overload Condition X
Control
On-Line (READY LED –Green) X X
Off-Line (READY LED – Off) X X
Problem (READY LED Yellow) X X
Inhibit/Overload Reset X
Power Requirements
+24 V dc – 15 mA +12 V dc – 55 mA
–24 V dc – 10 mA –12 V dc – 50 mA
+6 V dc – 350 mA
12 9641 ICB HV Power Supply User’s Manual – 9231711C
Physical
Physical
SIZE – Standard single width NIM module 3.43 x 22.12 cm (1.35 x 8.71 in.) per
DOE/ER-0457T.
NET WEIGHT – 1.02 kg (2.25 lb)
SHIPPING WEIGHT – 1.93 kg (4.25 lb)
Environmental
OPERATING TEMPERATURE – 0 to 50 °C (32 to 122 °F).
OPERATING HUMIDITY – 0 to 80% relative, non-condensing.
Tested to the environmental conditions specified by EN 61010, Installation Category
I, Pollution Degree 2.
Cables
A 12-port connecting cable is supplied with each Model 556 AIM; if the cable is
ordered separately, specify Model C1560 12-port ICB Connecting Cable.
9641 ICB HV Power Supply User’s Manual – 9231711C 13
Appendix BRear Panel Connectors
B. Rear Panel Connectors
This appendix lists the details of the 9641’s rear panel connector.
HV Output
SHV connector supplies 0 to 2000 volts adjustable in increments of 1.95 volts.
10 Output
SHV connector supplies 0 to 200 volts adjustable in increments of 0.195 volts.
Inhibit
BNC connector, input accepts an externally generated signal to enable/disable the
HV output. A logic low (≤0.7 volts) will disable the HV Output. The maximum high
level is programmable with selections of +5 V or +12 V. A high level or open circuit
will enable the HV output.
ICB Interface Connector
This 20-pin ribbon connector (J103) provides all the necessary signals for connection
to the Instrument Control Bus (ICB). Negative true signals are shown with a trailing
asterisk (LWE*); all other signals are positive true.
PIN SIGNAL PIN SIGNAL
1 GND 2 LD0
3 LD1 4 GND
5 LD2 6 LD3
7 GND 8 LD4
9 LD5 10 GND
11 LD6 12 LD7
13 GND 14 LWE*
15 GND 16 LDS*
17 GND 18 LAS*
19 GND 20 LSRQ*
14 9641 ICB HV Power Supply User’s Manual – 9231711C
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