The layer 0 inner silicon detector of the D0 experiment Angstadt, R.; Bagby, L.; Bean, A. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
10/2010, Letnik:
622, Številka:
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Journal Article
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This paper describes the design, fabrication, installation and performance of the new inner layer called Layer 0 (L0) that was inserted in the existing Run IIa silicon micro-strip tracker (SMT) of ...the D0 experiment at the Fermilab Tevatron p¯p collider. L0 provides tracking information from two layers of sensors, which are mounted with center lines at a radial distance of 16.1 and 17.6mm from the beam axis. The sensors and read-out electronics are mounted on a specially designed and fabricated carbon fiber structure that includes cooling for sensor and read-out electronics. The structure has a thin polyimide circuit bonded to it so that the circuit couples electrically to the carbon fiber allowing the support structure to be used both for detector grounding and a low impedance connection between the remotely mounted hybrids and the sensors.
SVX4 is the new silicon strip readout IC designed to meet the increased radiation tolerance requirements for Run IIb at the Tevatron collider. Devices have been fabricated, tested, and approved for ...production. The SVX4 design is a technology migration of the SVX3D design currently in use by CDF. Whereas SVX3D was fabricated in a 0.8-/spl mu/m radiation-hard process, SVX4 was fabricated in a standard 0.25-/spl mu/m mixed-signal CMOS technology using the "radiation tolerant by design" transistor topologies devised by the CERN RD49 collaboration. The specific cell layouts include digital cells developed by the ATLAS Pixel group, and full-custom analog blocks. Unlike its predecessors, the new design also includes the necessary features required for generic use by both the CDF and D0 experiments at Fermilab. Performance of the IC includes >20 MRad total dose tolerance, and /spl sim/2000 e-rms equivalent input noise charge with 40-pF input capacitance, when sampled at 132-ns period with an 80-ns preamp risetime. At the nominal digitize/readout rate of 106/53 MHz, the 9 mm/spl times/6.3 mm die dissipates /spl sim/2 mW/channel average at 2.5 V. A review of typical operation, details of the design conversion process, and performance measurements are covered.
A new digitizing and data acquisition system for the beam loss monitors is being developed for use in several accelerators of the Fermilab complex. In addition to providing diagnostic information ...about beam loss, the loss monitor system is designed to provide a primary protection against damage to the superconducting magnets of the Tevatron. Protecting the Tevatron magnets over the full set of collider operating conditions requires the abort logic and thresholds to be flexible and reconfigurable quickly from stored settings. A digitizer card is the core component of the system. It integrates and digitizes the current from the loss monitor chambers each beam revolution period (21 mus), maintains three running sums of up to 64k measurements, and compares the measurements and sums to programmable abort thresholds. In this paper we report on the overall system design and on tests of a prototype digitizer card during Tevatron operation.
The Silicon Micro-strip Tracker (SMT) at the DØ experiment in the Fermilab Tevatron collider has been operating since 2001. In 2006, an additional layer, referred to as ‘Layer 0’, was installed to ...improve impact parameter resolution and compensate for detector degradation due to radiation damage to the original innermost SMT layer. The SMT detector provides valuable tracking and vertexing information for the experiment. This contribution will highlight aspects of the long term operation of the SMT, including the impact of the silicon readout test-stand. Due to the full integration of the test-stand into the DØ trigger framework, this test-stand provides an advantageous tool for training of new experts and studying subtle effects in the SMT while minimizing impact on the global data acquisition.
A TRD trigger for the Tevatron Collider experiment at D0 Utes, M.; Johnson, M.; Martin, M.
IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States),
08/1992, Letnik:
39, Številka:
4
Journal Article, Conference Proceeding
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A VME-based module for use as an input to the D0 detector level 1.5 is described. Its main function will be the confirmation of electron candidates flagged by the first-level calorimeter trigger ...using digitized data from the transition radiation detector (TRD). Features of the board include the use of fast FIFOs to store incoming track coordinates, dual-ported SRAM lookup tables for addressing integrated charge data and forming scalars, multipliers/accumulators for speed of calculation, and a single synchronous finite state machine to control all board operations.< >
Testing a system as large as the D Zero data acquisition system is difficult. The use of IBM compatible personal computers in a hardware test system that can run on any size system from an engineer’s ...test bench to the entire subsystem in the D Zero Detector is described. The test system uses a PC to W E bus interface for the local testing and the Token Ring network for more global testing. This system has been implemented for several different hardware systems in D Zero.
This paper describes the design and construction of the MicroBooNE liquid argon time projection chamber and associated systems. MicroBooNE is the first phase of the Short Baseline Neutrino program, ...located at Fermilab, and will utilize the capabilities of liquid argon detectors to examine a rich assortment of physics topics. In this document details of design specifications, assembly procedures, and acceptance tests are reported.
The SiliconMicro-strip Tracker (SMT) at the D{\O} experiment in the Fermilab
Tevatron collider has been operating since 2001. In 2006, an additional layer,
referred to as 'Layer 0', was installed to ...improve impact parameter resolution
and compensate for detector degradation due to radiation damage to the original
innermost SMT layer. The SMT detector provides valuable tracking and vertexing
information for the experiment. This contribution will highlight aspects of the
long term operation of the SMT, including the impact of the silicon readout
test-stand. Due to the full integration of the test-stand into the D{\O}
trigger framework, this test-stand provides an advantageous tool for training
of new experts and studying subtle effects in the SMT while minimizing impact
on the global data acquisition.
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