The DAQ of the COMPASS experiment

Schmitt, L.; Angerer, H.; Franz, Neil; Grube, B.; Ketzer, B.; Konorov, I.; Kühn, Ralf; Liebl, Wolfgang; Paul, S.; Fischer, H.; Grünemaier, A.; Heinsius, F. H.; Königsmann, K.; Schmidt, T.; Fuchs, U.; Lamanna, M.

doi:10.1109/tns.2004.829386

Cited by 28 publications

(14 citation statements)

References 10 publications

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“…The two main versions cover data acquisition with common trigger, like in current high energy physics experiments (e.g. COM-PASS [6]), and a self triggering scheme. The later case has its importance for example within medical imaging, when many channels provide signals without a common trigger information.…”

Section: Discussionmentioning

confidence: 99%

A Versatile Sampling ADC System for On-Detector Applications and the AdvancedTCA Crate Standard

Mann

Konorov

Paul

2007

2007 15th IEEE-NPSS Real-Time Conference

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A data acquisition system based on sampling analog to digital converters (ADCs) and data processing in field programmable gate arrays (FPGAs) is presented. Up to 32 ADC channels are combined with reconfigurable logic on a small mezzanine form factor card to get a handy module for analog data acquisition. This module can then be mounted either on a dedicated detector frontend or included in an Advanced Telecom Computing Architecture (ATCA) crate system. For on-detector usage the system provides several features for fail safe and also fail tolerant operation and data readout. This opens applications in high energy physics detectors with difficult access schemes to the electronic part. The crate system offers on the other hand a high channel density with moderate channel costs. Additionally, the ATCA standard provides enough data bandwidth for online data processing within the crate system. Due to the unified interface of the ADC mezzanine cards, the system cost can be further reduced by an easy up-or downgrade of the ADC sampling frequency or the channel count by exchanging just the mezzanine card and thus maintaining the whole surrounding infrastructure. This enables to serve different detector requirements with a limited number of different mezzanine card types and eases also further enhancements with new upcoming ADC or FPGA devices.

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Section: Discussionmentioning

confidence: 99%

A Versatile Sampling ADC System for On-Detector Applications and the AdvancedTCA Crate Standard

Mann

Konorov

Paul

2007

2007 15th IEEE-NPSS Real-Time Conference

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“…Data from the front-end cards are transferred via optical links to the COMPASS readout and data acquisition system [8].…”

Section: Article In Pressmentioning

confidence: 99%

The fast photon detection system of COMPASS RICH-1

Abbon¹,

Alekseev²,

Angerer³

et al. 2007

Nuclear Instruments and Methods in Physics Research Section A:

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“…a time resolution of better than 120 ps and can handle input rates up to 10 MHz at trigger rates of up to 100 kHz. The data from one frontend card with 64 read-out channels are transferred via optical links to the COMPASS read-out system [8]. All read-out electronics is mounted in a very compact setup directly on the detector.…”

Section: The Upgrade Of the Central Regionmentioning

confidence: 99%

Fast photon detection for the COMPASS RICH detector

Abbon¹,

Alekseev²,

Angerer³

et al. 2007

Nuclear Physics B - Proceedings Supplements

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Particle identification at high rates is a central aspect of many present and future experiments in high-energy particle physics. The COMPASS experiment at the SPS accelerator at CERN uses a large scale Ring Imaging CHerenkov detector (RICH) to identify pions, kaons and protons in a wide momentum range. For the data taking in 2006, the COMPASS RICH has been upgraded in the central photon detection area (25% of the surface) with a new technology to detect Cherenkov photons at very high count rates of several 10 6 s −1 per channel and a new dead-time free read-out system, which allows trigger rates up to 100 kHz. The Cherenkov photons are detected by an array of 576 visible and ultra-violet sensitive multi-anode photomultipliers with 16 channels each. Lens telescopes of fused silica lenses have been designed and built to focus the Cherenkov photons onto the individual photomultipliers. The read-out electronics of the PMTs is based on the MAD4 amplifier-discriminator chip and the dead-time free high resolution F1-TDC. The 120 ps time resolution of the digital card guarantees negligible background from uncorrelated physical events. In the outer part of the detector, where the particle rates are lower, the present multi-wire proportional chambers (MWPC) with Cesium Iodide photo-cathodes have been upgraded with a new read-out electronic system based on the APV preamplifier and shaper ASIC with analog pipeline and sampling ADCs. The project was fully designed and implemented in the period November 2004 until May 2006. The upgraded detector showed an excellent performance during the 2006 data taking: the number of detected Cherenkov photons per ring was increased from 14 to above 60 at saturation. The time resolution was improved from about 3 microseconds to about one nanosecond which allows an excellent suppression of the background photons from uncorrelated events.

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The DAQ of the COMPASS experiment

Cited by 28 publications

References 10 publications

A Versatile Sampling ADC System for On-Detector Applications and the AdvancedTCA Crate Standard

A Versatile Sampling ADC System for On-Detector Applications and the AdvancedTCA Crate Standard

The fast photon detection system of COMPASS RICH-1

Fast photon detection for the COMPASS RICH detector

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