FRONT-END ASIC FOR A SILICON COMPTON TELESCOPE.

Conference · Sat Oct 27 04:00:00 EDT 2007

OSTI ID:921922

DE GERONIMO, G; FRIED, J; FROST, E; PHLIPS, B; VERNON, E; WULF, E A

We describe a front-end application specific integrated circuit (ASIC) developed for a silicon Compton telescope. Composed of 32 channels, it reads out signals in both polarities from each side of a Silicon strip sensor, 2 mm thick 27 cm long, characterized by a strip capacitance of 30 pF. Each front-end channel provides low-noise charge amplification, shaping with a stabilized baseline, discrimination, and peak detection with an analog memory. The channels can process events simultaneously, and the read out is sparsified. The charge amplifier makes uses a dual-cascode configuration and dual-polarity adaptive reset, The low-hysteresis discriminator and the multi-phase peak detector process signals with a dynamic range in excess of four hundred. An equivalent noise charge (ENC) below 200 electrons was measured at 30 pF, with a slope of about 4.5 electrons/pF at a peaking time of 4 {micro}s. With a total dissipated power of 5 mW the channel covers an energy range up to 3.2 MeV.

• Research Organization: Brookhaven National Laboratory
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 921922
• Report Number(s): BNL--79557-2007-CP; KA-04-04
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
COMPTON EFFECT
DESIGN
INTEGRATED CIRCUITS
TELESCOPES