Particle identification studies with a full-size 4-GEM prototype for the ALICE TPC upgrade

Aggarwal, M. M.; Ahammed, Z.; Aiola, S.; Alme, J.; Alt, T.; Andronic, A.; Anguelov, V.; Appelshäuser, H.; Arslandoc, Mesut; Averbeck, R.; Ball, M.; Barnaföldi, G. G.; Bartsch, E.; Bellwied, R.; Bencédi, G.; Berger, Martin; Bialas, N.; Bianchi, L.; Biswas, S.; Boldizsár, L.; Bratrud, L.; Braun‐Munzinger, P.; Bregant, M.; Britton, C.L.; Brücken, E.; Caines, H.; Castro, A.; Chattopadhyay, S.; Christiansen, P.; Clonts, L.G.; Cormier, T. M.; Dash, S.; Das, S.; Deisting, A.; Dittrich, S; Ehlers, R. J.; Helstrup, H.; Langoy, R.; Lien, J.; Mahmood, S. M.; Mathis, Andreas Michael; Rehman, A.; Röhrich, D.; Ullaland, K.; Velure, A.; Røed, K.; Wikne, J.; Zhao, C.

doi:10.1016/j.nima.2018.06.084

Cited by 13 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The new chambers will employ stacks containing Standard (S, 140 µm pitch) and Large Pitch (LP, 280 µm pitch) GEMs in the configuration S-LP-LP-S. This solution fulfils challenging requirements of the upgrade in terms of energy resolution, ion backflow (IBF) and stability against electrical discharges [5,6].…”

Section: Introductionmentioning

confidence: 99%

Discharge probability studies with multi-GEM detectors for the ALICE TPC Upgrade

Gasik¹

2019

Proceedings of 5th International Conference on Micro-Pattern Gas Detectors — PoS(MPGD2017)

View full text Add to dashboard Cite

A large Time Projection Chamber (TPC) is the main device for tracking and charged-particle identification in the ALICE experiment at the CERN LHC. After the second long shutdown in 2019-2020, the LHC will deliver Pb beams colliding at an interaction rate of up to 50 kHz, which is about a factor of 50 above the present readout rate of the TPC. To fully exploit the LHC potential, the TPC readout chambers will be upgraded with Gas Electron Multiplier (GEM) technology. To assure stable behaviour of the upgraded chambers in the harsh LHC environment, a dedicated R&D programme was launched in order to optimize GEM stack geometry and its high voltage configuration with respect to electric discharges. We present a summary of discharge probability measurements performed with 3-and 4-GEM prototypes irradiated with highly ionising alpha particles.

show abstract

Section: Introductionmentioning

confidence: 99%

Discharge probability studies with multi-GEM detectors for the ALICE TPC Upgrade

Gasik¹

2019

Proceedings of 5th International Conference on Micro-Pattern Gas Detectors — PoS(MPGD2017)

View full text Add to dashboard Cite

show abstract

“…In order to validate the performance of a large-size detector equipped with a stack of four GEMs in terms of d𝐸/d𝑥 resolution, a prototype IROC was tested at the CERN Proton Synchrotron [7,36]. The main result of this campaign is shown in Fig.…”

Section: Particle Identification Performancementioning

confidence: 99%

“…Horizontal error bars correspond to the uncertainty of 𝜎( 55 Fe) measurement with small prototypes. Data points and simulation are taken from [36].…”

Section: Particle Identification Performancementioning

confidence: 99%

The upgrade of the ALICE TPC with GEMs and continuous readout

Adolfsson,

Ahmed,

Aiola

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

The upgrade of the ALICE TPC will allow the experiment to cope with the high interaction rates foreseen for the forthcoming Run 3 and Run 4 at the CERN LHC. In this article, we describe the design of new readout chambers and front-end electronics, which are driven by the goals of the experiment. Gas Electron Multiplier (GEM) detectors arranged in stacks containing four GEMs each, and continuous readout electronics based on the SAMPA chip, an ALICE development, are replacing the previous elements. The construction of these new elements, together with their associated quality control procedures, is explained in detail. Finally, the readout chamber and front-end electronics cards replacement, together with the commissioning of the detector prior to installation in the experimental cavern, are presented. After a nine-year period of R&D, construction, and assembly, the upgrade of the TPC was completed in 2020. K: Charge transport and multiplication in gas, Electron multipliers (gas), Gaseous detectors, Gaseous imaging and tracking detectors, Micropattern gaseous detectors (GEM), Time Projection Chambers (TPC), dE/dx detectors, CMOS readout of gaseous detectors, Gas systems and purification, Voltage distributions Dedicated to the memory of Richard Daniel Majka

show abstract

“…The fraction of ions reaching the cathode depends on the detector architecture. In recent years, MPGD schemes with enhanced ion blocking capability have been developed [4,[14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Nanodiamond photocathodes for MPGD-based single photon detectors at future EIC

et al. 2020

View full text Add to dashboard Cite

We are developing gaseous photon detectors for Cherenkov imaging applications in the experiments at the future Electron Ion Collider. CsI, converting photons in the far ultraviolet range, is, so far, the only photoconverter compatible with the operation of gaseous detectors. It is very delicate to handle due to its hygroscopic nature: the absorbed water vapour decomposes the CsI molecule. In addition, its quantum efficiency degrades under ion bombardment. These are the key reasons to quest for novel, less delicate materials for photocathodes adequate for gaseous photon detectors. Layers of hydrogenated nanodiamond particles have recently been proposed as an alternative material and have shown promising characteristics. The performance of nanodiamond photocathodes coupled to thick GEM-based detectors is the objects of our ongoing R&D. The first phase of these studies includes the characterization of thick GEM coated with nanodiamond layers and the robustness of its photoconverting properties with respect to the bombardment by ions from the multiplication process in the gaseous detector. The approach is described in detail as well as all the results obtained so far within these exploratory studies.

show abstract

Particle identification studies with a full-size 4-GEM prototype for the ALICE TPC upgrade

Cited by 13 publications

References 19 publications

Discharge probability studies with multi-GEM detectors for the ALICE TPC Upgrade

Discharge probability studies with multi-GEM detectors for the ALICE TPC Upgrade

The upgrade of the ALICE TPC with GEMs and continuous readout

Nanodiamond photocathodes for MPGD-based single photon detectors at future EIC

Contact Info

Product

Resources

About