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Multiport II™
The Multiport II unit 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.
Features
- Up to six independent Multichannel Analyzers (in-the-field customer upgradable)
- Each MCA fully computer controlled
- 16K ADC, 1 µs 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, PIPS®, X-PIPS™ and other detector technologies
- Communications interface: Ethernet/USB
- Fully supported by Genie™ 2000 software
Description
The Multiport II MCA module provides greater flexibility than traditional bus plug-in boards but at a comparable cost. It can be purchased in versions from one to six inputs. Units with fewer than six inputs can be field upgraded with additional inputs.
The Multiport II module is easy to install and easy to link. Host computer interfacing is accomplished via a standard USB port or a standard Ethernet port (unshielded twisted pair) and through standard protocols. These widely recognized interfaces make the unit compatible with a wide range of computer platforms. Also, multiple Multiport II units can be totally remote-controlled from a single computer. Furthermore, there is only one cable between the host computer and the Multiport II NIM module for simplicity of inter connection.
The Multiport II MCAs are suitable for use with a wide range of radiation detectors. Selecting a proper preamplifier, amplifier and high voltage power supply, makes the unit 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 use of parallel processing technique results in an effective zero time to “add one” in memory, resulting in a fast conversion time. Furthermore, the on-board implementation of the sliding scale method improves the linearity and the channel uniformity. To protect long collections from power failure, the Multiport II unit features on-board data and settings retention at fixed time intervals for each of its MCAs.
Each Multiport II MCA provides full I/O support, including Mirion standard PUR/LTC, sample changer synchronization and advanced PHA operations.
For more flexibility and more applications, both Pulse Height Analysis (PHA) and Multichannel Scaling (MCS) modes of operation are supported. 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.
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