Nuclear Instrumentation Module

The NIM standard, original an acronym for Nuclear Instrumentation Module standard, was developed in 1964 for nuclear and high energy physics. Nuclear Instrumentation Standards ( NIM) are modular systems with bus connections, which serve only to power the built-in modules. The power is supplied via the bus ( backplane). These standards are designed completely modular, so that there is always a kind of " modular system " is available. The dimensions of the modules, the dimensions of the housing and super-frame and the connections ( backplane) are determined in accordance with the standards of EUR 4100 and AEC NIM ( TIS20893 ). The concept of modules in electronic systems allows enormous advantages in the flexibility in the exchange of instruments in the reduced design effort; they are easy to extend and maintain.

The NIM standard is the first ( and probably the easiest ) of such standards. He was report TID - 20893 defined by the U.S. Atomic Energy Commission 's in 1968-1969 and was in large parts of 1990 revised ( DOE/ER-0457T ). It provides a common pad for electronic modules, which are plugged into a larger case ( NIM crate, or NIM bin). The housing provides ± 12 and ± 24 volts DC for the modules via a backplane ready; the standard also writes ± 6V DC and 220V or 110V AC power ports before, but not all NIM housing have this. Seen construction Technically, the NIM modules have a minimum width of precip: 3.43 cm (1.35 in ) and a height of 22.225 cm ( 8.75 in ). The width can be as multiples of this standard, so there is double - wide and triple- wide modules. The insets serve as a holding device and power supply for 12 NIM modules. NIM modules can e.g. Be analog / digital converter, Analyzers, preamplifier and high voltage supplies. The NIM standard also defines the cables, connectors and connectors, impedances and thresholds for logic signals.

The Nuclear Instrumentation Module ( NIM ) standard is a standard for negative logic level.

For example, since the photomultiplier supply negative levels in 1964 logic level for negative pulses were defined in the NIM. This standard defines the logical "1" or " 0" currents, voltages above 50 Ω terminating resistors are measurable.

This in contrast defines the transistor-transistor logic (TTL) logic " 1 " or " 0" positive voltage level.

  • Digital technology
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