Tools for Discovery CAEN solutions for Diamond Detectors June 24 th 2011, Viareggio Giuliano Mini.

Tools for Discovery

CAEN solutions for Diamond Detectors

June 24th 2011, ViareggioGiuliano Mini

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Diamond Detectors & their read out

Diamond Detectors require challenging read out electronics:

• High Gain

• High Analogue Bandwidth

• High Sampling Rate

Wideband Amplifier

(Very) Fast Digitizers

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Wideband Amplifier

A1423:

1.6 GHz bandwith (-3 dB)

Positive or negative input signals

Gain range: from +15 dB to +50 dB

Input and output impedance 50 Ω, SWR <1.5:1

Noise Figure: 5dB @ 1GHz

Up to 500 V (positive or negative) detector bias voltage

Possibility to mount an Embedded Fast Discriminator (under test)

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Fast Digitizers (I)

x751 family:

8/4/2 channels depending on Form Factorand Sampling Rate

1/2 GSps

10 bit

500 MHz bandwidth (-3db)

Memory buffer up to 14.5MS/s per channel

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Fast Digitizers (II)

x761 family:

2/1 channels depending on Form Factor

4 GSps

10 bit

>850 MHz bandwidth (-3db)

Memory buffer up to 57.6MS/s per channel

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Fast Digitizers (III)

x742 family:

32/16 +2 channels depending on Form Factor

Up to 5 GSps

12 bit

600 MHz bandwidth (-3db)

1024 samples per event

Memory buffer up to 1024 events per channel

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Diamond

Syncrotron NIM Trigger(100 ns, -800mV, 50 Hz)

Neutron Beam Bunch spread 50

nsEn> 6 MeV

Wideband AmplifierGain x4, PoliMi

DT5751

ch1 ch0

RT~2 nsWidth~10 ns

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An example of application (I)

Digital ToF Measurements of Fast Neutrons in a Spallation Neutron Source

(ROTAX beamline at ISIS, M. Tardocchi, Milano Bicocca )

DBA-III

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An example of application (II)

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An example of application (III)

• Time difference between trigger signal and max of detector pulse is stored with the max value

•In figure is shown a typical ToF spectrum where the two peaks correspond to the two bunches of neutrons generated by the machine.