Prototypes of ionizing radiation detectors with internal signal amplification based on the bipolar transistor effect have been fabricated at ITC-irst (Trento, Italy). Results from the electrical characterization and preliminary functional tests of the devices have been previously reported. Here, we present a more detailed investigation of the performance of this type of detector, with particular attention to their noise and rate limits. Measurements of the signal waveform and of the gain versus frequency dependence are performed by illuminating the devices with, respectively, pulsed or sinusoidally modulated IR light. Pulse height spectra of X-rays from an 241Am source have been taken with very simple front-end electronics (an LF351 operational amplifier) or by directly reading with an oscilloscope the voltage drop across a load resistor connected to the emitter. An equivalent noise charge (referred to input) of 380 electrons r.m.s. has been obtained with the first setup for a small device, with an active area of 0.5x0.5 mm2 and a depleted thickness of 0.6 mm. The corresponding power dissipation in the BJT was 17 mW. The performance limitations of the devices are discussed.

Performance evaluation of radiation sensors with internal signal amplification based on the BJT effect / L., Bosisio; G., Batignani; S., Bettarini; M., Boscardin; G. F., DALLA BETTA; G., Giacomini; C., Piemonte; Verzellesi, Giovanni; N., Zorzi. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 568:(2006), pp. 217-223.

Performance evaluation of radiation sensors with internal signal amplification based on the BJT effect

VERZELLESI, Giovanni;
2006

Abstract

Prototypes of ionizing radiation detectors with internal signal amplification based on the bipolar transistor effect have been fabricated at ITC-irst (Trento, Italy). Results from the electrical characterization and preliminary functional tests of the devices have been previously reported. Here, we present a more detailed investigation of the performance of this type of detector, with particular attention to their noise and rate limits. Measurements of the signal waveform and of the gain versus frequency dependence are performed by illuminating the devices with, respectively, pulsed or sinusoidally modulated IR light. Pulse height spectra of X-rays from an 241Am source have been taken with very simple front-end electronics (an LF351 operational amplifier) or by directly reading with an oscilloscope the voltage drop across a load resistor connected to the emitter. An equivalent noise charge (referred to input) of 380 electrons r.m.s. has been obtained with the first setup for a small device, with an active area of 0.5x0.5 mm2 and a depleted thickness of 0.6 mm. The corresponding power dissipation in the BJT was 17 mW. The performance limitations of the devices are discussed.
568
217
223
Performance evaluation of radiation sensors with internal signal amplification based on the BJT effect / L., Bosisio; G., Batignani; S., Bettarini; M., Boscardin; G. F., DALLA BETTA; G., Giacomini; C., Piemonte; Verzellesi, Giovanni; N., Zorzi. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 568:(2006), pp. 217-223.
L., Bosisio; G., Batignani; S., Bettarini; M., Boscardin; G. F., DALLA BETTA; G., Giacomini; C., Piemonte; Verzellesi, Giovanni; N., Zorzi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/460418
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