A new generation of high-resolution hypernuclear gamma-spectroscopy experiments with high-purity germanium detectors (HPGe) are presently designed at the FINUDA spectrometer at DAFNE, the Frascati f-factory, and at PANDA, the pp hadron spectrometer at the future FAIR facility. Both, the FINUDA and PANDA spectrometers are built around the target region covering a large solid angle. To maximise the detection efficiency the HPGe detectors have to be located near the target, and therefore they have to be operated in strong magnetic fields (B=1 T). The performance of HPGe detectors in such an environment has not been well investigated so far. In the present work VEGA and EUROBALL Cluster HPGe detectors were tested in the field provided by the ALADiN magnet at GSI. No significant degradation of the energy resolution was found, and a change in the rise time distribution of the pulses from preamplifiers was observed. A correlation between rise time and pulse height was observed and is used to correct the measured energy, recovering the energy resolution almost completely. Moreover, no problems in the electronics due to the magnetic field were observed.

Performance of HPGe detectors in high magnetic field / Iazzi, Felice; Szymanska, Katarzyna; A., SANCHEZ LORENTE; P., Achenbach; Agnello, Michelangelo; T., Bressani; Bufalino, Stefania; B., Cederwall; A., Feliciello; Ferro, Fabrizio; Kavatsyuk, J. G. E. R. L. M.; I., Kojouharov; L., Majling; A., Pantaleo; M., Palomba; J., Pochodazalla; G., Raciti; N., Saito; T. R., Saito; H., Schaffer; C., Sfienti; P. E., Tegner. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - A573:(2007), pp. 410-417. [10.1016/j.nima.2006.12.030]

Performance of HPGe detectors in high magnetic field

IAZZI, Felice;SZYMANSKA, KATARZYNA;AGNELLO, MICHELANGELO;BUFALINO, STEFANIA;FERRO, Fabrizio;
2007

Abstract

A new generation of high-resolution hypernuclear gamma-spectroscopy experiments with high-purity germanium detectors (HPGe) are presently designed at the FINUDA spectrometer at DAFNE, the Frascati f-factory, and at PANDA, the pp hadron spectrometer at the future FAIR facility. Both, the FINUDA and PANDA spectrometers are built around the target region covering a large solid angle. To maximise the detection efficiency the HPGe detectors have to be located near the target, and therefore they have to be operated in strong magnetic fields (B=1 T). The performance of HPGe detectors in such an environment has not been well investigated so far. In the present work VEGA and EUROBALL Cluster HPGe detectors were tested in the field provided by the ALADiN magnet at GSI. No significant degradation of the energy resolution was found, and a change in the rise time distribution of the pulses from preamplifiers was observed. A correlation between rise time and pulse height was observed and is used to correct the measured energy, recovering the energy resolution almost completely. Moreover, no problems in the electronics due to the magnetic field were observed.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1665051
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