EURO-SPECTRUM ENHANCER - CdTe

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EURO-SPECTRUM ENHANCER - CdTe INSTRUCTION S MANUAL CORPORATE HEADQUARTER CTT, 23, rue du Loess, BP 20, F-67037 STRASBOURG-CEDEX 2 Tel.

1 EURO-SPECTRUM ENHANCER - CdTe INSTRUCTION S MANUAL CORPORATE HEADQUARTER CTT, 23, rue du Loess, BP 20, F STRASBOURG-CEDEX 2 Tel. : +33 (0) , Fax : + 33 (0) info@eurorad.com Web : COMMERCIAL OFFICE 24, rue du Pont F CHENNEVIERES SUR MARNE Tel : +33 (0) Fax : +33 (0) info@eurorad.com Web : EURORAD 1/10

2 TABLE OF CONTENTS MAIN CHARACTERISTICS OF THE EURO-SPECTRUM ENHANCER...3 PRESENTATION...4 SYNOPTIC...4 FRONT PANEL VIEW...5 REAR PANEL VIEW...6 MECHANICAL SPECIFICATIONS...7 CONNECTION DIAGRAMM...7 MATERIAL REQUIREMENT...8 INSTALLATION...8 EXAMPLE OF SPECTRUM...9 EURORAD 2/10

MAIN CHARACTERISTICS OF THE EURO-SPECTRUM ENHANCER The Euro-Spectrum Enhancer is a spectrometric system, specifically adapted to detectors, probes and preamplifier developed by Eurorad.

3 MAIN CHARACTERISTICS OF THE EURO-SPECTRUM ENHANCER The Euro-Spectrum Enhancer is a spectrometric system, specifically adapted to detectors, probes and preamplifier developed by Eurorad. The Euro-Spectrum Enhancer system can be used together with CdTe and CdZnTe detectors for high energy spectrometry applications (137 Cs). Since it incorporates a time discriminator, the resolution FWHM and the P/V ratio are both improved with minimum loss in counting rate. The Euro-Spectrum Enhancer system includes both bias generator and power supply, allowing full practical efficiency with minimum external connections. EURORAD 3/10

4 PRESENTATION The Eurospectrum Enhancer set contains: One spectroscopic amplifier with shaping time adjusting One fast spectrometric amplifier One time discriminator One bias generator (optional) The power supply By selecting fast rise time pulses, the system permits an enhancement of the spectra obtained with CdTe and CZT detectors. SYNOPTIC P/Z GAIN 1 CR-RC2 2 1 BLR 2 OUTPUT 1 1 CSP 2 INPUT 1 POS NEG CR-RC2 2 1 BLR 2 Time Discriminator GATE SELECTOR 1 Detector 2 Preamplifier 3 Polarity selector 4 Main amplifier and P/Z cancellation 5 Delay line 6 Base line restorer 7 Second fast amplifier 8 Base line restorer 9 Time discriminator & selector potentiometer 9 EURORAD 4/10

FRONT PANEL VIEW MCA OUTPUT Polarity selector GATE OUTPUT Power Led P/Z adjustment Gain Time selector Polarity : Pos/Neg switch P/Z: 10 turns screwdriver potentiometer Gain: Precision potentiometer

5 FRONT PANEL VIEW MCA OUTPUT Polarity selector GATE OUTPUT Power Led P/Z adjustment Gain Time selector Polarity : Pos/Neg switch P/Z: 10 turns screwdriver potentiometer Gain: Precision potentiometer from x15 to x550 OUTPUT: Unipolar output Zo=50Ω Full scale range 0 to +10V Shaping times are factory adjusted : 0.5µs, 1µs & 2µs (adapted to HgI 2 ) GATE: TTL output About 5.5µs positive pulse Selector : 10 turns screwdriver potentiometer Turn counterclockwise to have more selection and less efficiency Turn clockwise to have less selection and more efficiency EURORAD 5/10

6 REAR PANEL VIEW ON/OFF Switch Preamplifier power supply HV connector INPUT HV adjustment SHV male connector and HT detector adjustment potentiometer (From +30 to +140V) ON/OFF switch: O for OFF I for ON PREAMP: 9-pin female Amphenol connector for preamplifier +/-12V INPUT : Type BNC connector. DC coupled Zin about 1KΩ Power VAC 0.2A 50/60 Hz Power required +12V at 60mA and 12V 45mA (without preamplifier) Fuse T1A into the box EURORAD 6/10

7 MECHANICAL SPECIFICATIONS Dimensions of the box: 50x152.5x220 mm Weight: About 1.5Kg CONNECTION DIAGRAMM INPUT Detector + preamplifier DB9 BIAS (internal or external) OUT MCA GATE IN MCA GATE EURORAD 7/10

8 MATERIAL REQUIREMENT Sensivity preamplifier : 2V/pc minimum Preamplifier power voltages : +/-12V INSTALLATION Plug the power supply cable into a plug Plug the DB9 preamplifier to PREAMP on the rear panel Connect the preamplifier OUTPUT to the BNC INPUT Plug the SHV connector and adjust the high voltage (+110V in factory) Switch the EURO-SPECTRUM ENHANCER ON, green led goes on Connect OUTPUT to MCA and an oscilloscope Place a radioactive source in front of the detector Observe the spectrum and adjust the gain Connect GATE output to MCA GATE input Select the coincidence mode (refer to the MCA s user manual) Adjust the selector potentiometer to obtain a good spectrum response EURORAD 8/10

9 EXAMPLE OF SPECTRUM CdTe 57 Co spectrum with different selection 57Co SPECTRUM WITH AND WITHOUT SELECTION Counts 3000 Série1 Série kev CdTe 137 Cs spectrum 137Cs SPECTRUM WITH AND WITHOUT SELECTION Counts 400 without sel with sel kev EURORAD 9/10

10 CdTe 133 Ba spectrum 133Ba spectrum with and without sel Counts Without sel with sel kev EURORAD 10/10

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