LArPix: Demonstration of low-power 3D pixelated charge readout for liquid argon time projection chambers
| Title: | LArPix: Demonstration of low-power 3D pixelated charge readout for liquid argon time projection chambers |
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| Authors: | Dwyer, D. A., Garcia-Sciveres, M., Gnani, D., Grace, C., Kohn, S., Kramer, M., Krieger, A., Lin, C. J., Luk, K. B., Madigan, P., Marshall, C., Steiner, H., Stezelberger, T. |
| Source: | JINST 13 P10007 (2018) |
| Publication Year: | 2018 |
| Collection: | High Energy Physics - Experiment Physics (Other) |
| Subject Terms: | Physics - Instrumentation and Detectors, High Energy Physics - Experiment |
| More Details: | We report the demonstration of a low-power pixelated readout system designed for three-dimensional ionization charge detection and digital readout of liquid argon time projection chambers (LArTPCs). Unambiguous 3D charge readout was achieved using a custom-designed system-on-a-chip ASIC (LArPix) to uniquely instrument each pad in a pixelated array of charge-collection pads. The LArPix ASIC, manufactured in 180 nm bulk CMOS, provides 32 channels of charge-sensitive amplification with self-triggered digitization and multiplexed readout at temperatures from 80 K to 300 K. Using an 832-channel LArPix-based readout system with 3 mm spacing between pads, we demonstrated low-noise ($<$500 e$^-$ RMS equivalent noise charge) and very low-power ($<$100 $\mu$W/channel) ionization signal detection and readout. The readout was used to successfully measure the three-dimensional ionization distributions of cosmic rays passing through a LArTPC, free from the ambiguities of existing projective techniques. The system design relies on standard printed circuit board manufacturing techniques, enabling scalable and low-cost production of large-area readout systems using common commercial facilities. This demonstration overcomes a critical technical obstacle for operation of LArTPCs in high-occupancy environments, such as the near detector site of the Deep Underground Neutrino Experiment (DUNE). Comment: 19 pages, 10 figures, 1 ancillary animation. V3 includes minor revisions based on referee comments |
| Document Type: | Working Paper |
| DOI: | 10.1088/1748-0221/13/10/P10007 |
| Access URL: | http://arxiv.org/abs/1808.02969 |
| Accession Number: | edsarx.1808.02969 |
| Database: | arXiv |
| DOI: | 10.1088/1748-0221/13/10/P10007 |
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