Development of very-thick transparent GEMs with wavelength-shifting capability for noble element TPCs

AbstractA new concept for the simultaneous detection of primary and secondary scintillation in time projection chambers is proposed. Its core element is a type of very-thick GEM structure supplied with transparent electrodes and machined from a polyethylene naphthalate plate, a natural wavelength shifter. Such a device has good prospects for scalability and, by virtue of its genuine optical properties, it can improve on the light collection efficiency, energy threshold and resolution of conventional micropattern gas detectors. This, together with the intrinsic radiopurity of its constituting elements, offers advantages for noble gas and liquid based time projection chambers, used for dark matter searches and neutrino experiments. Production, optical and electrical characterization, and first measurements performed with the new device are reported.

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Development of the GridPix detector for dual phase noble gas time projection chambers

2011 IEEE Nuclear Science Symposium Conference Record ◽

10.1109/nssmic.2011.6154446 ◽

2011 ◽

Cited By ~ 1

Author(s):

M. Alfonsi ◽

N. van Bakel ◽

M. P. Decowski ◽

G. Hemink ◽

H. van der Graaf ◽

...

Keyword(s):

Noble Gas ◽

Dual Phase ◽

Time Projection Chambers ◽

Time Projection

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Space Charge Effects in Noble-Liquid Calorimeters and Time Projection Chambers

Instruments ◽

10.3390/instruments5010009 ◽

2021 ◽

Vol 5 (1) ◽

pp. 9

Author(s):

Sandro Palestini

Keyword(s):

Space Charge ◽

Scaling Laws ◽

Relative Size ◽

Design Solution ◽

Space Charge Effects ◽

Charge Effects ◽

Time Projection Chambers ◽

Drift Length ◽

Calibration Methods ◽

Time Projection

The subject of space charge in ionization detectors is reviewed, showing how the observations and the formalism used to describe the effects have evolved, starting with applications to calorimeters and reaching recent, large time-projection chambers. General scaling laws, and different ways to present and model the effects are presented. The relations between space-charge effects and the boundary conditions imposed on the side faces of the detector are discussed, together with a design solution that mitigates some of the effects. The implications of the relative size of drift length and transverse detector size are illustrated. Calibration methods are briefly discussed.

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Evaluation of Portable Acceleration Solutions for LArTPC Simulation Using Wire-Cell Toolkit

EPJ Web of Conferences ◽

10.1051/epjconf/202125103032 ◽

2021 ◽

Vol 251 ◽

pp. 03032

Author(s):

Haiwang Yu ◽

Zhihua Dong ◽

Kyle Knoepfel ◽

Meifeng Lin ◽

Brett Viren ◽

...

Keyword(s):

Heterogeneous Computing ◽

Programming Model ◽

Liquid Argon ◽

Simulation Code ◽

Computationally Intensive ◽

Physics Model ◽

Specialized Hardware ◽

Neutrino Experiments ◽

High Level ◽

Time Projection

The Liquid Argon Time Projection Chamber (LArTPC) technology plays an essential role in many current and future neutrino experiments. Accurate and fast simulation is critical to developing efficient analysis algorithms and precise physics model projections. The speed of simulation becomes more important as Deep Learning algorithms are getting more widely used in LArTPC analysis and their training requires a large simulated dataset. Heterogeneous computing is an efficient way to delegate computationally intensive tasks to specialized hardware. However, as the landscape of compute accelerators quickly evolves, it becomes increasingly difficult to manually adapt the code to the latest hardware or software environments. A solution which is portable to multiple hardware architectures without substantially compromising performance would thus be very beneficial, especially for long-term projects such as the LArTPC simulations. In search of a portable, scalable and maintainable software solution for LArTPC simulations, we have started to explore high-level portable programming frameworks that support several hardware backends. In this paper, we present our experience porting the LArTPC simulation code in the Wire-Cell Toolkit to NVIDIA GPUs, first with the CUDA programming model and then with a portable library called Kokkos. Preliminary performance results on NVIDIA V100 GPUs and multi-core CPUs are presented, followed by a discussion of the factors affiecting the performance and plans for future improvements.

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Gas-filled detectors

Particle Detectors ◽

10.1093/oso/9780198858362.003.0007 ◽

2020 ◽

pp. 171-254

Author(s):

Hermann Kolanoski ◽

Norbert Wermes

Keyword(s):

Magnetic Fields ◽

Particle Physics ◽

Parallel Plate ◽

Charged Particles ◽

Aging Effects ◽

Charge Generation ◽

Detector Performance ◽

Time Projection Chambers ◽

Drift Chambers ◽

Time Projection

Detectors that record charged particles through their ionisation of gases are found in many experiments of nuclear and particle physics. By conversion of the charges created along a track into electrical signals, particle trajectories can be measured with these detectors in large volumes, also inside magnetic fields. The operation principles of gaseous detectors are explained, which include charge generation, gas amplification, operation modes and gas mixtures. Different detector types are described in some detail, starting with ionisation chambers without gas amplification, proceeding to those with gas amplification like spark and streamer chambers, parallel plate arrangements, multi-wire proportional chambers, chambers with microstructured electrodes, drift chambers, and ending with time-projection chambers. The chapter closes with an overview of aging effects in gaseous detectors which cause negative alterations of the detector performance.

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First Demonstration of a Pixelated Charge Readout for Single-Phase Liquid Argon Time Projection Chambers

Instruments ◽

10.3390/instruments4010009 ◽

2020 ◽

Vol 4 (1) ◽

pp. 9 ◽

Cited By ~ 2

Author(s):

Jonathan Asaadi ◽

Martin Auger ◽

Antonio Ereditato ◽

Damian Goeldi ◽

Umut Kose ◽

...

Keyword(s):

Single Phase ◽

Signal To Noise Ratio ◽

Liquid Argon ◽

Track Reconstruction ◽

3D Tracking ◽

3D Space ◽

Time Projection Chambers ◽

Event Reconstruction ◽

Phase Liquid ◽

Time Projection

Traditional charge readout technologies of single-phase Liquid Argon Time projection Chambers (LArTPCs) based on projective wire readout introduce intrinsic ambiguities in event reconstruction. Combined with the slow response inherent in LArTPC detectors, reconstruction ambiguities have limited their performance, until now. Here, we present a proof of principle of a pixelated charge readout that enables the full 3D tracking capabilities of LArTPCs. We characterize the signal-to-noise ratio of charge readout chain to be about 14, and demonstrate track reconstruction on 3D space points produced by the pixel readout. This pixelated charge readout makes LArTPCs a viable option for high-multiplicity environments.

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