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Signal Processing(NIM)

Products in category

Model 2003BT Silicon Detector Preamplifier

Model 2003BT Silicon Detector Preamplifier

Description

The CANBERRA Model 2003BT charge sensitive FET input preamp is designed for optimum performance with Silicon detectors such as the CANBERRA Passivated Implanted Planar Silicon (PIPS®) detectors and legacy Silicon Surface Barrier (SSB)detectors. Operating as a charge to voltage converter, the unit accepts charge carriers produced in the detector during each absorbed nuclear event. The output then provides a voltage in direct proportion to the collected charge at the rate of 0.45 V per pC. This translates to a gain of 20 mV per MeV for room temperature silicon detectors.

For typical use with positively biased silicon detectors, the extremely linear energy output provides a positive polarity pulse ideal for energy spectroscopy. The coincident timing output provides a negative polarity fast differentiated pulse ideal for resolution of nuclear events in time.

The high charge rate capability of the design is evidenced by an energy rate capacity of greater than 2 x 106 MeV per second when used with silicon detectors. In order to take full advantage of such a high count rate capability, a main amplifier with a correspondingly high count rate ability, such as the CANBERRA Model 2025 or Model 2026, should be used.

The basic operation of the preamplifier is indicated in the functional schematic. The first stage acts as an operational integrator which produces an output potential proportional to the accumulated charge on the feedback capacitor Cf. The integrator drives the energy output directly. The timing output is derived from the integrator error signal through a pulse shaping network. Such an arrangement allows for the low noise and fast rise times, as in Table 1 (see spec sheet). To preserve pulse fidelity the energy output is buffered through a series terminating resistor of 93 Ω.

The preamplifier offers a noise contribution of only 2.0 keV, FWHM, Si, with a rate of increase with increasing input capacitance of ±10 eV per pF. All necessary power is provided by a CANBERRA main amplifier through the 300 cm (10 ft) compatible cable furnished with the preamp.

Model 2003BT Silicon Surface Barrier Detector Preamplifier

Features

  • Low noise design: less than 2.0 keV (Si) at 0 pF
  • High energy rate capability: up to 2 x 106 MeV per second
  • FET input, diode protected
  • Independent energy and fast timing outputs
  • Fast rise time less than 3 ns at 0 pF
  • Small size
  • Capable of operating in a vacuum chamber
Model 2004 Semiconductor Detector Preamplifier

Model 2004 Semiconductor Detector Preamplifier

Description

The CANBERRA Model 2004 charge sensitive FET input preamplifier was designed for use with both low and high capacitance semiconductor detectors. The preamp converts the charge carriers developed in the detector during each absorbed nuclear event to a step function voltage pulse, the amplitude of which is proportional to the total charge accumulated in that event. The output provides a positive polarity signal when used with detectors requiring positive bias and decays with a nominal time constant of 50 ms.

The high charge rate capability of the design is evidenced by a charge rate capacity of better than 2 x 10-7 coulombs per second, or 4.5 x 106 MeV per second for silicon detectors. In order to take full advantage of such a high count rate capability, a main amplifier with a correspondingly high count rate ability, such as the CANBERRA Model 2020, should be employed.

As shown in the functional schematic, the first stage acts as an operational integrator which produces an output potential proportional to the accumulated charge. This integrator is coupled to an output buffer stage through a pole/zero trim network. A feature of particular importance to certain users is a removable socketed resistor on the printed circuit board for disabling the pole/zero circuit. For low count rate applications using high leakage detectors, the resulting low frequency noise bandwidth may improve resolution.

The preamplifier offers a noise contribution of only 2.8 keV, FWHM, Si, with a rate of noise increase with increasing input capacitance of only 10 eV per picofarad, FWHM, Si. Conversion gains of nominally 9 mV per MeV or 45 mV per MeV (Si) may be selected by a jumper plug on the printed circuit board inside the unit.

In addition, the input circuit includes a protection network to prevent damage to the input FET from transient high voltage waveforms caused by sudden application or removal of detector bias, or a detector fault. All necessary power is provided by a CANBERRA main amplifier through the 300 cm (ten ft.) compatible cable.

Model 2004 Semiconductor Detector Preamplifier

Features

  • Low noise design: less than 2.8 keV (Si) at 0 pF
  • High charge rate capability: up to 4.5 X 106 MeV/sec
  • FET input, diode protected
  • Pole/zero select or defeat
  • High voltage operation up to ±2000 V dc
Model 2005 Scintillation Preamplifier

Model 2005 Scintillation Preamplifier

Description

The CANBERRA Model 2005 is a charge sensitive preamplifier which collects the charge output from scintillation/photomultiplier detectors for presentation to a pulse shaping main amplifier. For the typical application with input from the decoupled anode signal from a photomultiplier tube base, the preamplifier generates a positive polarity energy pulse output.

Functionally the unit operates as an integrator utilizing an operational type configuration by which the potential difference across the feedback capacitor is directly proportional to the charge accumulated from the detector input. The integrator is followed by a pole/zero cancellation circuit for optimum overload performance, and a differentiator to provide the 50 ms tail pulse. In addition, a buffer stage allows the Model 2005 to drive a long cable length without pulse degradation.

Charge conversion gains of nominally 4.5 or 22.7 millivolts per picocoulomb may be selected by a jumper plug on the printed circuit board inside the unit. Power for the unit is usually supplied from the associated main amplifier through the 3 m (10 ft) power cable provided with the preamp.

Model 2005 Scintillation Preamplifier

Features

  • Low noise design: less than 10-15 coulombs rms
  • High charge rate capacity (up to 9 mC/s) for high count rate applications
  • FET input, diode protected
  • Fast risetime: less than 15 ns
Model 2006 Proportional Counter Preamplifier

Model 2006 Proportional Counter Preamplifier

Description

The CANBERRA Models 2006 preamplfier is designed for use with proportional counter detectors. The preamp converts the ionization charge from the detector into a step voltage pulse whose amplitude is proportional to the total charge collected in each event. The pulse decays with a time constant of 50 ms for presentation to a main amplifier.

For typical use with a positive HV bias to the anode of the detector, the preamplifier generates positive polarity energy pulses which are shaped in the amplifier as necessary for counting or low energy x-ray analysis.

This preamplifier contains a diode-protected FET input stage optimized for low noise operation. The first stage acts as an operational integrator which produces an output potential proportional to the accumulated charge. This integrator configuration is followed by a pole/zero adjustment to return the unipolar pulse to a reference or baseline level without overshoot, and a differentiator to provide the 50 ms tail pulse. The second active stage operates as a buffer for driving various cable lengths without pulse degradation. Conversion gains of nominally 47 mV/M-ion-pairs or 235 mV/M-ion-pairs may be selected by a jumper plug inside the unit. The higher scale factor is especially useful for best signal-to-noise ratio in experiments involving low energy sources.

The noise level is equivalent to less than 350 ion pairs with zero source capacitance using 2 ms near-Gaussian pulse shaping, and degrades less than 1 ion pair per pF of input capacitance. As illustrated in Table 1, low noise and fast rise time prevail over a wide range of input capacitance. The high count rate capability of the design is evidenced by a charge rate capacity greater than 2 x 10-7 coulombs per second. In order to take full advantage of such a high count rate capability, a high count rate main shaping amplifier is recommended.

A test input is provided to assist in system setup. The test capacitor value is certified in the unit test report for reference use as a secondary charge calibration standard. The nominal voltage gain from the test output is X 1 for the output scale factor of 47 mV/M-ion-pairs and X 5 for the output scale factor of 235 mV/M-ion-pairs.

Power is supplied from the associated CANBERRA pulse shaping amplifier. The power lines are filtered within the unit to provide high noise immunity. A 3 m (10 ft) power cable is provided with the preamp.

Model 2006 Proportional Counter Preamplifier

Features

  • Low noise design: <350 ion pairs at Cs = 0 pF
  • High charge rate capacity for high count rate applications; up to 2 x 10-7 coulombs/second
  • FET input, diode protected
  • Fast risetime: <20 ns at Cs = 0 pF
  • High voltage operation up to ±2000 V dc
Model 2007B Scintillation Preamplifier

Model 2007B Scintillation Preamplifier

Description

The Model 2007B low-noise charge-sensitive preamplifier integrates the charge pulse from a PMT (decoupled from the anode) and converts it into a convenient positive voltage pulse output. The peak amplitude of each output pulse is linearly proportional to the total charge output of the PMT during each amplified photo event. The pulse is set to decay at a nominal 50 ms time constant, and interfaces directly with any of CANBERRA's spectroscopy amplifiers.

The 2007B generates a positive polarity output pulse in response to a typical input signal from a photomultiplier's decoupled anode. This amplifier features high voltage transient protection for a longer life in your lab, low noise contribution for better resolution and a rise time of less than 20 ns for use in timing applications.

Model 2007B Scintillation Preamplifier

Features

  • Low preamp power requirement ±12 V dc at 15 mA
  • Compatible with Accuspec NaI Plus
  • HV transient protection.
Model 2007/2007P Photomultiplier Tube Base/Preamplifier

Model 2007/2007P Photomultiplier Tube Base/Preamplifier

Description

The CANBERRA Models 2007 and 2007P are compact PM tube bases containing a high-voltage divider network to supply all necessary bias voltages for most common 10-stage PM tubes. A focus control provides for optimization of detector resolution and a gain control permits trimming the HV bias when several tubes must be matched for array setups.

Designed for compatibility with the CANBERRA Model 802 Series scintillation detectors, or equivalent, the tube base connects directly to the PMT, providing one integrally mounted assembly.

The Model 2007 includes high-voltage blocking capacitors to couple the anode and dynode signal outputs to a preamplifier, such as the CANBERRA Model 2005, or to a constant fraction discriminator, such as the CANBERRA Model 2129.

The Model 2007P includes a preamplifier which integrates the charge impulse from the anode of the PM tube to a pulse-shaping main amplifier, such as the CANBERRA Model 2020. The preamp features high-voltage transient protection, noise contribution less than 0.1 fC rms, and a rise time of less than 20 ns.

Model 2007/2007P Photomultiplier Tube Base/Preamplifier

Features

  • Mounts directly on photomultiplier tube (PMT)
  • Up to + 2 kV dc PMT bias
  • Separate focus and gain controls
  • Model 2007 has separate anode and dynode outputs
  • Model 2007P combines tube base with low noise, charge sensitive preamplifier with HV transient protection
Multiport II Multichannel Analyzer

Multiport II Multichannel Analyzer

Description

The Multiport II is a double width NIM intended for use where existing amplifier and HVPS modules are to be combined with a high analog performance, low-cost ADC/MCA. It provides greater flexibility than traditional bus plug-in boards but at a comparable cost. Multiport II can be purchased in versions from one to six inputs. Units with fewer than six inputs can be field upgraded with additional inputs. Two communications interface versions are available: Ethernet/USB and USB only.

Multiport is suitable for use with a wide range of radiation detectors. Selecting a proper preamplifier, amplifier and high voltage power supply, makes Multiport compatible with NaI(Tl), HPGe, SiLi, CdTe, Ion Implanted, Plastic scintillation, BGO and other detector technologies. Modular NIM packaging makes it easy to reconfigure systems as needs change or as new technologies become available.

The Multiport II is easy to install and easy to link. Host computer interfacing is accomplished via a standard USB port or a standard Ethernet port (UTP) and through standard protocols. These widely recognized interfaces make the Multiport II compatible with a wide range of computer platforms, so the Multiport II user need not worry about compatibility as computer bus standards evolve. Also, multiple Multiport II units can be totally remote-controlled from a single computer. The Multiport II provides better performance and lower noise than plug-in PC board based MCAs by keeping all sensitive components out of the computer itself and by putting the MCA close to the radiation detectors. Furthermore, there is only one cable between the host computer and the Multiport II NIM module for simplicity of inter connection.

Multiport II provides full I/O support, including CANBERRA standard PUR/LTC, sample changer synchronization and advanced PHA operations.

For more flexibility and more applications, Multiport II supports both Pulse Height Analysis (PHA) and Multichannel Scaling (MCS) modes of operation. In MCA mode, a single channel analyzer (SCA) is also available as well as input/output that allows acquisition to be synchronized by external modules. SCA output works in both modes PHA and MCS. In MCS mode SCA pulses may also be selected as input pulses. The maximum input rate is 10 MHZ in TTL input mode.

Multiport II Multichannel Analyzer

Features

  • Up to six independent Multichannel Analyzers (in-the-field customer upgradable)
  • Each MCA fully computer controlled
  • 16K ADC, 1 usec fast fixed conversion time with linearization enhancement circuit for excellent nonlinearity
  • Fully buffered memory allowing simultaneous ADC memory write and spectrum transfer to host computer
  • PHA and MCS acquisition modes
  • Full I/O control (including sample changer)
  • On-board data backup
  • Suitable for HPGe, NaI(Tl), CdTe and other detector technologies
  • Communications interface: Ethernet/USB or USB only
  • Fully supported by Genie™ 2000 software
Model 2000/2100 Bin/Power Supply

Model 2000/2100 Bin/Power Supply

Description

The CANBERRA Models 2000 and 2100 Bin/Power Supplies provide mounting space and power sources for up to 12 standard Nuclear Instrument Modules (NIM) conforming to DOE/ER-0457T. Multiple width NIM modules are also accommodated in any combination up to a total of 12 single widths. Modern circuit design and thermal management allow a high level of performance to be delivered in an adjustment-free, low-profile package that allows easy access to the NIM rear panels.

Connectors for each module position provide the standard NIM power supply voltages of ±6*, ±12 and ±24 V dc, and 117 V ac. Up to 150 W of total dc power is available to a balanced load at ambient temperatures up to 50 °C, with derating up to 60 °C. The power supply is EMI filtered, short-circuit proof, thermally protected, tightly regulated and exceptionally stable. It includes over-voltage protection for the ±6 V supplies*. In addition, the ac inrush current is controlled to reduce transients in sensitive systems as well as to enhance reliability.

The control panel includes an on/off switch, a power monitor lamp, voltage test points and a temperature warning lamp which indicates temperatures approaching the design limit of the power supply.

The Bin is preconfigured at the factory for the standard line power of the destination country. However, an externally accessible line-entry module facilitates selection of 100, 120, 230 or 240 V ac nominal input power.

Model 2000/2100 Bin/Power Supply

Features

  • NIM standard, IEC 801 compliant
  • 150 W capability (96 W for Model 2000)
  • 90-130 V or 193-260 V operation
  • ±12 V at 3 A, ±24 V at 1.5 A, ±6 V at 10 A*

*+/-6 V supply provided only on the Model 2100.

Model 3002D 0-3 kV H.V. Power Supply

Model 3002D 0-3 kV H.V. Power Supply

Description

The CANBERRA Model 3002D is a NIM Bin compatible high voltage power supply designed for operation with essentially all types of nuclear radiation detectors. Particularly well-suited for use with scintillation detectors, the standard double-width NIM module provides a well regulated output up to 10 mA at 0 to ±3000 V dc.

A recessed switch on the bottom panel is used to select either 115 or 230 V ac input power furnished through a power line cord and connector. The Model 3002D can also be operated outside the NIM Bin from any ac power receptacle, since it requires no power from the Bin. The power supply will withstand any overload or direct output short-circuit for an indefinite period of time and provide normal output automatically upon removal of the fault.


Output voltage is continuously adjustable by means of the calibrated front panel control over the full range from 0 to ±3000 V. The output voltage can also be controlled over its full range by application of an external input dc level of 0 to -5 V through a rear panel BNC connector.

A 3-1/2 digit liquid crystal display meter measures output voltage with a resolution of 10 V, and output current with a resolution of 10 mA. A polarity reversal switch provides selection of positive or negative output polarity. To prevent inadvertent polarity reversal, the switch is top panel mounted and screwdriver activated. In addition, the setting of the polarity selector switch is indicated by illumination of a front panel LED which can be previewed in the STANDBY mode.

Model 3002D 0-3 kV H.V. Power Supply

Features

  • Digital display of voltage and current
  • Regulated 0 to ±3000 V dc, 0 to 10 mA output
  • External control of output voltage over full range
  • Polarity indication with preview
  • Noise and ripple <10 mV peak-to-peak
  • Overload and short circuit protected
Model 3102D 0-2 kV H.V. Power Supply

Model 3102D 0-2 kV H.V. Power Supply

Description

The CANBERRA Model 3102D High Voltage Power Supply is a single-width NIM module designed primarily for use with photomultiplier and electron multiplier tubes. But it can be used with any detector requiring a bias voltage up to 2000 V and a current level of 1 mA or less.

The 3102D allows the user to select from two continuously adjustable outputs, one ranging from ±15 to ±2000 V dc and the other from ±1.5 to ±200 V dc. The output voltage is measured and displayed by a three-digit voltmeter. In addition, this unit allows the user to select the output voltage polarity with an internal control.

The 3102D can withstand any overload or short circuit for an indefinite period of time. It can be set using an internal jumper to allow for a manual reset or an automatic reset when the fault condition is removed.

The 3102D features an output rise time of five seconds to protect preamplifiers and detectors from excessive surge currents while charging.

Model 3102D 0-2 kV H.V. Power Supply

Features

  • Compact single width NIM package
  • Regulated up to ±2000 V dc. 1 mA output
  • Noise and ripple ≥3 mV peak to peak
  • Overload and short circuit protected
  • Overload, inhibit and polarity status indicators
  • Inhibit and overload latching circuits
  • Digital front panel meter
Model 3106D 0-6 kV H.V. Power Supply

Model 3106D 0-6 kV H.V. Power Supply

Description

The CANBERRA Model 3106D is a NIM high voltage power supply designed primarily for operation with semiconductor detectors. It is particularly well suited for use with high resolution detector systems. By design, the 3106D will accommodate all types of detectors requiring up to 6 kV bias and up to 300 μA of current.

The output voltage is continuously adjustable from ±30 V dc to ±6000 V dc. For low voltage detectors, a secondary output having a range of ±3 V to ±600 V is available. A three-digit volt meter measures and displays the output voltage with a resolution of 10 volts on the normal output and 1 volt on the secondary output. Polarity is selected internally.

The Model 3106D will withstand any overload or short circuit condition for an indefinite period of time. An inhibit input is available for remote shut down of the 3106D. The unit can be programmed by an internal jumper either to resume normal operation after removal of the fault or the inhibit or to require a manual reset.

The 3106D’s output rise time of 5 seconds protects preamplifiers and detectors from excessive surge currents while charging.

Model 3106D 0-6 kV H.V. Power Supply

Features

  • Compact single width NIM package
  • Regulated up to ±6000 V dc, 300 μA output
  • Noise and ripple ≤3 mV peak to peak
  • Overload and short circuit protected
  • Overload, inhibit and polarity status indicators
  • Inhibit and overload latching circuits
  • Digital front panel meter
Model 2015B AMP/TSCA

Model 2015B AMP/TSCA

Description

The CANBERRA Model 2015B combines, in one single width module, a spectroscopy amplifier with gated baseline restoration and a timing single channel pulse height analyzer.

The 2015B amplifier employs a simple gated baseline restorer which, because of its symmetrical characteristic, provides high resolution for HPGe detectors at low and high counting rates.

Although it is a high performance instrument, the Model 2015B is also very versatile. It has all the characteristics necessary to make it useful with scintillation detectors, gas proportional counters, and silicon detectors. High gain, low noise, selectable time constants, and count rate optimization are several of the more important features designed into the amplifier of the Model 2015B.

The utility of the Model 2015B derives from the dual function of its pulse height analyzer circuitry. In the SCA mode of operation, a logic signal output is generated whenever the amplifier unipolar signal falls between the energy levels determined by the front panel controls (E and ΔE). This mode is especially useful when a wide dynamic range is required.

In the Timing (TSCA) mode the same logic signal is generated, but it is referenced in time relative to the leading edge of the preamp signal. This provides a signal that is useful in applications requiring time coincidence.

In addition to the SCA OUTPUT, the Model 2015B also provides a multifunction capability which can be programmed internally to provide a lower level (E) Discriminator Output, or an upper level DISCriminator (E + ΔE) Output or to provide an external input level for remote control of the lower level discriminator.

Precise repeatable performance is designed and built into the 2015B. The front panel variable controls of the Model 2015B are precision ten-turn potentiometers. The precision of the ΔE window setting can be further enhanced by use of rear panel sensitivity selector switch (ΔE Range). A front panel LED indicator is provided to assist in set up and troubleshooting. The LED is activated from the lower level discriminator and is useful for setting the discriminator just above the noise.

Model 2015B AMP/TSCA

Features

  • Spectroscopy grade amplifier with high count rate restoration
  • Timing single channel analyzer with:
    • SCA and LLD or ULD outputs
    • LLD threshold indicator for easy set-up
    • Preamp leading edge timing
  • Designed for use with proportional counters, NaI(Tl), Ge, and Si detectors
Model 2026 Spectroscopy Amplifier

Model 2026 Spectroscopy Amplifier

Description

The Model 2026 amplifier provides the features and performance of a research amplifier in an easy to use single width NIM module. Now you can have the flexibility you need without the amplifier set-up and adjustment aggravation you don't need.

The Model 2026 lets you select either Gaussian or Triangular pulse shaping for the Unipolar output with a convenient front panel switch. In addition, it offers a choice of six front panel switch-selectable shaping time constants for each of the pulse shaping methods. This direct control of both the shaping method and time constants lets you select the configuration that will optimize resolution and throughput performance based on your application.

The 2026's Pileup Rejector/Live Time Corrector (PUR/LTC) circuitry allows quantitative gamma analysis with minimal dependence on system count rate. The PUR circuit interrogates incoming pulses for pile up and generates a signal that prevents the ADC from converting the piled up events. The LTC circuit then generates a system dead time that extends the collection time to compensate for the events lost due to pileup rejection. The result: lower background, better resolution and accurate live time information for the best possible analysis results.

But don't worry about setting up this amplifier. Many of the 2026's features are self-adjusting so you get the performance you need and a trouble-free setup. The 2026 automatically adjusts the PUR threshold just above your system noise level, insuring PUR efficiency and minimizing the spectral distortion caused by pile up at high count rates. The restoration rate and threshold of the gated baseline restorer are also automatically optimized for both low and high count rate applications. With all these automatic features the 2026 gives you consistently better data for your activity calculations, regardless of the count rate, the application or the operator.

The 2026 lets you position peaks precisely and easily with its Super Fine Gain (SFG) control. The SFG provides gain resolution better than 1 in 16 000 (0.00625%), allowing greater precision for more accurate peak location in less time. This feature is now a requirement, instead of a luxury, for most spectroscopy systems. This is especially true in applications using detector arrays in which the inputs from several detectors must be combined into a single spectrum.

The excellent overload recovery characteristics of the 2026 make it ideal for use with today's high throughput reset preamplifiers such as the CANBERRA 2101 Transistor Reset Preamplifier. This allows you to assemble a high resolution spectroscopy system without the energy rate limitations normally associated with RC preamplifiers.

The Model 2026's wide gain range allows you to use it with a wide range of detectors including germanium, silicon, scintillation, proportional counters or pulsed ion chambers. The versatility of the 2026 is further enhanced by a bipolar output for use in timing and gating applications.

Model 2026 Spectroscopy Amplifier

Features

  • Gaussian/Triangular shaping
  • Super fine gain control
  • Pileup rejector and live time corrector
  • Automatic baseline recovery rate and threshold
  • Differential input
  • Excellent overload recovery
  • Compact single width NIM