Beetle—a radiation hard readout chip for the LHCb experiment Agari, M.; van Bakel, N.; Bauer, C. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2004, Letnik:
518, Številka:
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A new radiation hard pipelined readout chip is being developed for the LHCb-experiment. Appropriate design measures have been taken to ensure the radiation hardness against total ionising dose ...effects in excess of
45
Mrad
, as well as radiation effects induced by single particles.
The base frequency of oscillators used in the Global System for Mobile Communication (GSM) network or Global Positioning System (GPS) receiver applications needs to be very stable with respect to ...temperature and supply-voltage variations. One approach to obtain extremely good frequency stability is the use of oven-stabilized crystal oscillators. With this kind of oscillator, a frequency stability versus temperature of a few ppb versus the standard temperature range can be achieved. In this paper, a digitally compensated crystal oscillator is described. The system provides a frequency stability of (/spl Delta/f)/f<1.5 ppm for a temperature range of -40/spl deg/C to 90/spl deg/C compared to about /spl plusmn/20 ppm for a noncompensated crystal. The core of the system is an application-specified integrated circuit (ASIC) fabricated in a standard 0.8-/spl mu/m CMOS process. The power consumption for the oscillator running at 13 MHz is 100 mW. The final device equipped with the ASIC, crystal blank, and a few external components fits into a 14/spl times/9/spl times/3 mm/sup 3/ package.
Overview of microstrip read-out chips Feuerstack-Raible, Martin
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2000, Letnik:
447, Številka:
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Journal Article
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In recent times a variety of different read-out chips for microstrip detectors have been designed or are being developed. This article gives an overview of chips currently available or chips which ...should be available within near future. The chips are categorized for better comparability.
The Beetle is a 128 channel analog pipelined readout chip which is intended for use in the silicon vertex locator (VELO) of the LHCb experiment at CERN. The Beetle chip is specially designed to ...withstand high radiation doses.
Two Beetle1.1 chips bonded to a silicon strip detector have been tested with minimum ionizing particles. The main goal was to measure the signal-to-noise (S/N) ratio of the Beetle1.1 connected to a prototype VELO detector. Furthermore we investigated the general behaviour of the Beetle1.1. In this note we present the chip architecture, the measured (S/N) numbers as well as some characteristics (e.g. risetime, spillover) of the Beetle1.1 chip. Results from a total ionizing dose irradiation test are reported.
We report on a search for the flavor-changing neutral current decay D0→μ+μ− using 50×106 events recorded with a dimuon trigger in interactions of 920 GeV protons with nuclei by the HERA-B experiment. ...We find no evidence for such decays and set a 90% confidence level upper limit on the branching fraction B(D0→μ+μ−)<2.0×10−6.
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