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460 delay line amplifier

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Brief description:Linear delay shaping for energy and time spectrum analysis of scintillation detectors Ideal for neutron gamma discrimination for pulse shape analysis Excellent high count rate performance Timing capabilities Optional integration time constant ORTEC Model 460 Linear Delay Shaping Amplifier for energy and time spectrum analysis of scintillation detectors

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Linear delay shaping for energy and time spectrum analysis of scintillation detectors
Ideal for neutron gamma discrimination for pulse shape analysis
Excellent high count rate performance
timing function
Optional integration time constant

ORTEC model 460 linear delay shaping amplifier is used for energy and time spectrum analysis of scintillation detectors. It can also be used in proportional counters, semiconductor detectors and position-sensitive proportional counters. Its delay-shaped output signal is particularly suitable for high count rate and timing applications. This specific type of output signal provides faster baseline recovery than a half-Gaussian shaped amplifier. Whether for cutting-edge or zero-crossing timing technology, the Model 460 has excellent timing capabilities, especially when used with the ORTEC Model 552 Pulse Shape Analyzer/Timing Single Channel Analyzer. Compared with traditional RC shaping circuits or active filter circuits, the timing jitter of double-delay linear shaping is smaller, which is mainly due to the fast rise and fall times of the output pulses after double-delay linear shaping.

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The Model 460 also offers the ability to select selectable integration time constants to optimize the signal-to-noise ratio in any particular experimental configuration. The integration time constant depends on factors such as system noise and the count rate in a particular experiment. The Type 460 is ideal for applications involving overload pulses as it recovers from an X500 overload to within 2% of its rated output in <5 non-overload pulse widths.

The Model 460 has <1 ns crosswalk over the 20:1 dynamic range of the output signal. It is therefore suitable for precise and fast coincidence timing applications using cross timing or constant fractional timing techniques. The Model 460 provides both immediate and delayed outputs, so the unipolar output can be temporarily stored for energy analysis as needed after timing and compliance evaluations are completed. A rear panel switch selects delayed or prompt reference recovery unipolar output.

The ORTEC Model 460 Amplifier is recommended for pulse shape analysis applications such as neutron gamma separation using the ORTEC Model 552 Pulse Shape Analyzer/Timed SCA.

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Performance

gain range	from10Arrive1000of7bit coarse gain selection and from0.3Arrive1single-turn fine gain control; the total gain is the result of the coarse and fine gain settings.
shaping filter	Front panel switch selectable integration time constant, τ= 0.04、0.1or0.25 μs（40、100or250 ns）。
integral nonlinearity	≤±0.05%。
noise	Use0.25 μssum of points1000gain, referred to the input terminal ≤20 μV rms;Gain= 50When, ≤25 μV;Gain= 10When, ≤60 μV。
cross swimming	For constant gain, at20:1dynamic range, swimming<±1 ns; in50:1dynamic range, swimming<±2 ns; in100:1dynamic range, swimming<±2.5 ns. For any adjacent coarse gain switch setting, the cross-offset<±4 ns。
Count rate stability	in existence¹³⁷Cssource0to10⁵random count/seconds, analyzer range85Pulse generator peak drift at %<0.2% whose peak value is stored in the analyzer range75% place.
temperature instability	Gain≤±0.01％/°C，0to50°C。 DC level≤±0.1 mV/°C，0to50°C。
Overload recovery	Bipolar fromX500overload in<5Return to rated output within a non-overload pulse width2Within %; the unipolar changes fromX100Overload recovery.
delayed linear shaping	1 µs. Both delays have the same value.

control

Fine-tune gain	Front panel single turn potentiometer for slaveX0.3ArriveX1Continuously adjust the gain factor.
Coarse gain adjustment	Seven-position switch on the front panel, you can chooseX10、20、50、100、200、500and1000gain factor.
INTEG	Front panel slide switch for selection0.04、0.1or0.25 μsthe integration time constant. for0.04 μssettings, amplifier rise time<75 ns。
PZ ADJ	The front panel potentiometer is used for25 μsThe decay time to ∞ is adjusted for pole-zero cancellation.
POS/NEG	Front panel slide switches are used to set the input circuit for either input polarity.
DC ADJ	The front panel potentiometer adjusts the DC level of the single delay line shaped unipolar output pulse.
delayIN/OUT	Rear panel slide switch selects delay for unipolar output pulses (In) or promptly (Out) timing. The delay time is equal to the width of the unipolar output pulse.

Input

BNC	Connectors on the front panel accept positive and negative inputs with a rise time of10to1000 ns, the decay time is25to2000 μs；Z_in ≅ 1000 Ω, DC coupled; linear3.3 V；20 V。

Output

Unipolar	0to+10 VFull-scale linear range in time or delayed; single delay line shaping; baseline recovery level adjustable to ±1 V；Z_o <1 Ω, via front panelBNCConnectors are DC coupled;Z_o = 93 Ω, via rear panelBNCThe connector is DC coupled. Short circuit protection.
bipolar	Timely output dominated by positive lobes,0-10 VDual delay line shaping for full-scale linear range;Z_o <1 Ω, via front panelBNCConnectors are DC coupled;Z_o = 93 Ω, via rear panelBNCThe connector is DC coupled. Short circuit protection.
preamplifier	Standard for use with preamplifiersORTECPower connector; rear panelAmphenol 17-10090connector.

electrical and mechanical

Required power supply	+24 V, 90 mA; –24 V, 90 mA; +12 V, 75 mA; –12 V, 60 mA。
weight	Net weight1Kilogram (2.25pounds). Shipping weight1.9Kilogram (4.25pounds).
Size	NIMStandard single width module,3.43 x 22.13cm (1.35 x 8.714inches), consistent withDOE/ER-0457Trequirements.

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460

delay line amplifier

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